Reconciliation of Effective Income Tax Rate (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Valuation Allowance [Line Items]
U.S. federal statutory income tax rate										35.00%		35.00%		35.00%
Income tax provision at U.S. federal statutory rate										$ 252.3		$ 163.8		$ 236.2
State and local income taxes, net of federal income tax benefit										21.4		6.5		27.3
Impact of foreign operations, including withholding taxes										1.7		30.5		8.4
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount										(66.0)	[1]	3.2	[1]	(57.3)	[1]
Worthless securities deduction										0		(22.2)		0
Increases in unrecognized tax benefits, net										5.2		0		24.1
Other										1.9		(0.6)		(25.4)
Total provision for income taxes	87.9	[2]	65.0	65.3	(1.7)	103.2	28.4	62.0	(12.4)	216.5		181.2		213.3
Effective income tax rate on operations										30.00%		38.70%		31.60%
One hundred percent valuation allowance										100.00%		100.00%		100.00%
Asia Pacific
Valuation Allowance [Line Items]
Reversal of valuation allowance														26.2
Continental Europe
Valuation Allowance [Line Items]
Reversal of valuation allowance										124.8				21.8
Valuation allowance established										57.2
Tax Contingency for the years 2007 - 2010 [Member]
Valuation Allowance [Line Items]
Valuation Allowances and Reserves, Charged to Cost and Expense														$ 19.5

[1] Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

[2] The three months ended December 31, 2014 included a tax benefit of $67.6 due to the net reversal of valuation allowances on deferred tax assets in Continental Europe.