Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS (Details)

v2.4.0.6
DISCONTINUED OPERATIONS (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Statements of Consolidated Operations                      
INCOME (LOSS) and GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax $ 30.8 $ (2.7) $ 2.3 $ 5.5 $ 16.5 $ (16.8) $ 16.3 $ 4.1 $ 35.9 $ 20.1 $ 22.5
Sonoma [Member]
                     
ASSETS HELD FOR SALE                      
Cash and cash equivalents 0       2.3       0 2.3  
Accounts receivable 0       16.3       0 16.3  
Inventories 0       18.8       0 18.8  
Other current assets 0       2.0       0 2.0  
Property, plant and equipment, net 0       120.5       0 120.5  
Assets held for sale 0       159.9       0 159.9  
LIABILITIES HELD FOR SALE                      
Accounts payable 0       15.6       0 15.6  
Accrued expenses 0       1.5       0 1.5  
Environmental and mine closure obligations 0       8.8       0 8.8  
Liabilities held for sale 0       25.9       0 25.9  
Statements of Consolidated Operations                      
REVENUES FROM PRODUCT SALES AND SERVICES - Product                 151.6 230.4 198.3
INCOME (LOSS) and GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax                 35.9 38.6 25.6
Income (Loss) From Discontinued Operations [Member] | Sonoma [Member]
                     
Statements of Consolidated Operations                      
GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax                 38.0 0 0
Gain on sale from discontinued operations, tax expense                 8.1    
INCOME (LOSS) and GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax                 (2.1) 38.6 25.6
Tax effect of discontinued operation, tax expense (benefit)                 $ 2.4 $ 12.4 $ 11.0