SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 27.6	$ 12.5	$ 12.3
Charged to Costs and Expenses	5.2	5.8	0.8
Charged to Other Accounts	7.9	10.2	(0.5)
Deductions	(4.8)	(0.9)	(0.1)
Balance at End of Year	35.9	27.6	12.5
Deferred tax asset valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	477.6	124.5	128.7
Charged to Costs and Expenses	272.6	214.1	(2.2)
Charged to Other Accounts	109.0	139.0	(2.0)
Deductions	0	0	0
Balance at End of Year	$ 859.2	$ 477.6	$ 124.5