Quarterly report pursuant to Section 13 or 15(d)

DEBT AND CREDIT FACILITIES DEBT AND CREDIT FACILITIES (Schedule of Extinguishment of Debt) (Details)

v3.10.0.1
DEBT AND CREDIT FACILITIES DEBT AND CREDIT FACILITIES (Schedule of Extinguishment of Debt) (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
$400 Million 5.90% 2020 Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value $ 88.4 $ 88.9
$1,075 Million 5.75% 2025 Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 1,073.3 1,075.0
$500 million 4.80% 2020 Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 122.3 122.4
$700 Million 4.875% 2021 Senior Note [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 125.2 $ 138.4
Debt Repurchase [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 15.5  
Debt Repurchase [Member] | $400 Million 5.90% 2020 Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 0.5  
Debt Repurchase [Member] | $1,075 Million 5.75% 2025 Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 1.7  
Debt Repurchase [Member] | $500 million 4.80% 2020 Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value 0.1  
Debt Repurchase [Member] | $700 Million 4.875% 2021 Senior Note [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Par Value $ 13.2