Annual report pursuant to Section 13 and 15(d)

DEBT AND CREDIT FACILITIES (Narrative) (Details)

v3.10.0.1
DEBT AND CREDIT FACILITIES (Narrative) (Details)
$ / shares in Units, shares in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2018
USD ($)
$ / shares
Dec. 31, 2017
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
shares
Feb. 28, 2018
USD ($)
Feb. 09, 2017
$ / shares
shares
Sep. 16, 2016
USD ($)
Aug. 10, 2016
$ / shares
shares
Mar. 30, 2015
USD ($)
Line of Credit Facility [Line Items]                    
Debt Extinguished     $ 227,400,000 $ 1,610,700,000            
Common shares, par value | $ / shares     $ 0.125 $ 0.125            
Common Stock, New Shares, Issued | shares             63,250   44,400  
Net proceeds from issuance of common shares     $ 0 $ 661,300,000 $ 287,400,000          
Shares Issued, Price Per Share | $ / shares             $ 10.75   $ 6.75  
Gain (loss) on extinguishment of debt     (6,800,000) (165,400,000) 166,300,000          
Debt redemption premiums paid   $ 17,400,000 7,100,000 110,000,000            
U.S. Tranche     400,000,000              
Sublimit for Issuers of Letters of Credit for U.S. Tranche     248,800,000              
Sublimit for U.S. Swingline Loans     100,000,000              
Debt issuance costs     $ 1,500,000 28,600,000 $ 5,200,000          
Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature       $ 83,400,000            
Common Shares Issued in Debt to Equity Exchange | shares         8,200          
$400 Million 4.875% 2024 Senior Notes [Member]                    
Line of Credit Facility [Line Items]                    
Imputed interest rate     5.00% 5.00%            
Debt Instrument, Interest Rate, Stated Percentage     4.875%              
Debt Instrument, Par Value     $ 400,000,000 $ 400,000,000            
Unamortized Debt Issuance Expense     5,700,000 7,100,000            
Debt Instrument, Unamortized Discount     $ 2,200,000 $ 2,600,000            
$1.075 Billion 5.75% 2025 Senior Notes [Member]                    
Line of Credit Facility [Line Items]                    
Proceeds from Issuance of Debt $ 500,000,000                  
Imputed interest rate     6.01% 6.01%            
Redemption Price of 35 percent or less of Outstanding     1.0575              
Debt Instrument, Interest Rate, Stated Percentage     5.75%              
Debt Instrument, Par Value     $ 1,073,300,000              
Note Redemption Price, Percent of Principal Amount to be Redeemed     100.00%              
Amount in aggregate that can be redeemed on or prior to March 1, 2020     0.35              
Unamortized Debt Issuance Expense     $ 9,900,000 $ 11,300,000            
Debt Instrument, Unamortized Discount     $ 14,600,000 $ 16,500,000            
$316 Million 1.5% 2025 Senior Notes [Domain]                    
Line of Credit Facility [Line Items]                    
Imputed interest rate     6.26% 6.26%            
Convertible debt, initial conversion price     $ 8.17              
Convertible debt, common shares exchanged     $ 122.4365              
Common shares, par value | $ / shares     $ 0.125              
Convertible debt, principal increment     $ 1,000              
Debt Instrument, Interest Rate, Stated Percentage     1.50%              
Debt Instrument, Par Value     $ 316,300,000 $ 316,300,000            
Note Redemption Price, Percent of Principal Amount to be Redeemed     100.00%              
Unamortized Debt Issuance Expense     $ 5,500,000 6,600,000            
Debt Instrument, Unamortized Discount     75,600,000 85,600,000            
$316 Million 1.5% 2025 Senior Notes [Domain] | Maximum [Member]                    
Line of Credit Facility [Line Items]                    
Convertible debt, conversion price percentage     0.98              
$316 Million 1.5% 2025 Senior Notes [Domain] | Minimum [Member]                    
Line of Credit Facility [Line Items]                    
Convertible debt, conversion price percentage     1.30              
$1.075 Billion 5.75% 2025 Senior Notes                    
Line of Credit Facility [Line Items]                    
Debt Extinguished     1,700,000              
Debt Instrument, Par Value       1,075,000,000            
Gain (loss) on extinguishment of debt     100,000              
$540 Million 8.25% 2020 First Lien Notes                    
Line of Credit Facility [Line Items]                    
Debt Extinguished $ 35,600,000     $ 540,000,000            
Debt Instrument, Interest Rate, Stated Percentage       8.25%            
Gain (loss) on extinguishment of debt       $ (93,500,000)            
$218.5 Million 8.00% 2020 1.5 Lien Notes                    
Line of Credit Facility [Line Items]                    
Debt Extinguished       $ 218,500,000            
Debt Instrument, Interest Rate, Stated Percentage       8.00% 8.00%          
Debt Instrument, Par Value         $ 218,500,000          
Gain (loss) on extinguishment of debt       $ 45,100,000 174,300,000          
Debt Instrument, Face Amount Exchanged         512,200,000          
$544.2 Million 7.75% 2020 Second Lien Notes                    
Line of Credit Facility [Line Items]                    
Debt Extinguished       $ 430,100,000            
Debt Instrument, Interest Rate, Stated Percentage       7.75%            
Gain (loss) on extinguishment of debt       $ (104,500,000) 6,900,000          
Debt Instrument, Face Amount Exchanged         $ 114,100,000          
Secured Debt [Member]                    
Line of Credit Facility [Line Items]                    
Debt Extinguished     648,600,000              
$500 Million 3.95% 2018 Senior Notes [Member]                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Interest Rate, Stated Percentage         3.95%          
Gain (loss) on extinguishment of debt   19,900,000     $ 1,800,000          
Debt Instrument, Face Amount Exchanged         17,600,000          
$400 Million 5.90% 2020 Senior Notes                    
Line of Credit Facility [Line Items]                    
Imputed interest rate       5.98%            
Debt Extinguished     $ 88,900,000 $ 136,700,000            
Debt Instrument, Interest Rate, Stated Percentage     5.90% 5.90%            
Debt Instrument, Par Value       $ 88,900,000            
Gain (loss) on extinguishment of debt     $ (3,300,000) (7,800,000) 28,300,000          
Unamortized Debt Issuance Expense       200,000            
Debt Instrument, Unamortized Discount       $ 100,000            
Debt Instrument, Face Amount Exchanged         $ 65,100,000          
$500 Million 4.80% 2020 Senior Notes                    
Line of Credit Facility [Line Items]                    
Imputed interest rate       4.83%            
Debt Extinguished     $ 122,400,000 $ 114,400,000            
Debt Instrument, Interest Rate, Stated Percentage     4.80% 4.80% 4.80%          
Debt Instrument, Par Value       $ 122,400,000            
Gain (loss) on extinguishment of debt     $ (3,700,000) (1,900,000) $ 19,500,000          
Debt Redemption Expenses   2,500,000                
Unamortized Debt Issuance Expense       300,000            
Debt Instrument, Unamortized Discount       $ 100,000            
Debt Instrument, Face Amount Exchanged         $ 44,700,000          
$700 Million 4.875% 2021 Senior Notes                    
Line of Credit Facility [Line Items]                    
Imputed interest rate     4.89% 4.89%            
Debt Extinguished     $ 14,400,000 $ 171,000,000            
Debt Instrument, Interest Rate, Stated Percentage     4.875% 4.875% 4.875%          
Debt Instrument, Par Value     $ 124,000,000 $ 138,400,000            
Gain (loss) on extinguishment of debt     $ 100,000 (2,800,000) $ 33,300,000          
Basis points     25              
Unamortized Debt Issuance Expense     $ 200,000 300,000            
Debt Instrument, Unamortized Discount     $ 0 $ 100,000            
Debt Instrument, Face Amount Exchanged         76,300,000          
$800 Million 6.25% 2040 Senior Notes [Member]                    
Line of Credit Facility [Line Items]                    
Imputed interest rate     6.34% 6.34%            
Debt Instrument, Par Value     $ 298,400,000 $ 298,400,000            
Gain (loss) on extinguishment of debt         84,500,000          
Basis points     40              
Unamortized Debt Issuance Expense     $ 2,300,000 2,400,000            
Debt Instrument, Unamortized Discount     3,300,000 3,400,000            
Debt Instrument, Face Amount Exchanged         194,400,000          
Unsecured Debt [Member]                    
Line of Credit Facility [Line Items]                    
Debt Extinguished     $ 422,200,000              
Repurchase price if triggering event occurs     1.01              
Note Redemption Price, Percent of Principal Amount to be Redeemed     100.00%              
Unsecured Debt [Member] | Maximum [Member]                    
Line of Credit Facility [Line Items]                    
Time Period During Which Senior Notes May Be Redeemed at Company's Option, Number of Days From When Prior Notice Sent to Holders     60 days              
Unsecured Debt [Member] | Minimum [Member]                    
Line of Credit Facility [Line Items]                    
Time Period During Which Senior Notes May Be Redeemed at Company's Option, Number of Days From When Prior Notice Sent to Holders     30 days              
ABL Facility [Member]                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Par Value           $ 450,000,000       $ 550,000,000
U.S. Tranche     $ 450,000,000              
Sublimit for Issuers of Letters of Credit for U.S. Tranche     273,200,000              
Sublimit for U.S. Swingline Loans     120,000,000              
Australian Tranche     50,000,000              
Sublimit for Issuance of Letters of Credit for Australian Tranche     24,400,000              
Sublimit for Australian Swingline Loans     $ 20,000,000              
LIBOR Rate Based on a One-month interest period plus 1 percent     0.01              
Fixed Charge Coverage Ratio     1.0              
Credit facility, amount outstanding     $ 0 0            
Line of Credit Facility, Remaining Borrowing Capacity     268,700,000 226,700,000            
Revolving credit facility, borrowing capacity     $ 323,700,000 273,200,000            
ABL Facility [Member] | Maximum [Member]                    
Line of Credit Facility [Line Items]                    
Base Rate     0.005              
Letter of Credit [Member]                    
Line of Credit Facility [Line Items]                    
Credit facility, amount outstanding     $ 55,000,000 $ 46,500,000            
Debt Repurchase [Member] | $500 Million 3.95% 2018 Senior Notes [Member]                    
Line of Credit Facility [Line Items]                    
Redemption Price               $ 301,000,000    
Debt Instrument, Par Value   $ 283,600,000                
Debt Repurchase [Member] | $500 Million 4.80% 2020 Senior Notes                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Par Value         5,000,000          
Gain (loss) on extinguishment of debt         600,000          
Exchange of Debt for Equity [Member]                    
Line of Credit Facility [Line Items]                    
Gain (loss) on extinguishment of debt         11,300,000          
Exchange of Debt for Equity [Member] | $218.5 Million 8.00% 2020 1.5 Lien Notes                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Face Amount Exchanged         20,100,000          
Exchange of Debt for Equity [Member] | $500 Million 3.95% 2018 Senior Notes [Member]                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Face Amount Exchanged         10,000,000          
Exchange of Debt for Equity [Member] | $700 Million 4.875% 2021 Senior Notes                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Face Amount Exchanged         $ 26,800,000          
Equity [Member] | $316 Million 1.5% 2025 Senior Notes [Domain]                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Unamortized Discount     $ 85,900,000              
Prime Rate [Member]                    
Line of Credit Facility [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     1.00%