Annual report pursuant to Section 13 and 15(d)

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details)

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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 442.8 $ 410.9 $ 315.1
Charged to Costs and Expenses (56.5) (158.4) (1.1)
Charged to Other Accounts (2.0) (12.3) 8.1
Deductions 6.7 202.6 88.8
Balance at End of Period 391.0 442.8 410.9
Trade accounts receivable      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 10.9 9.1 7.8
Charged to Costs and Expenses 5.4 5.6 5.0
Charged to Other Accounts 0.0 0.0 0.0
Deductions (5.1) (3.8) (3.7)
Balance at End of Period 11.2 10.9 9.1
Deferred income tax asset valuation allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 431.9 401.8 307.3
Charged to Costs and Expenses (61.9) (164.0) (6.1)
Charged to Other Accounts (2.0) (12.3) 8.1
Deductions 11.8 206.4 92.5
Balance at End of Period $ 379.8 $ 431.9 $ 401.8