Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2009
Income Tax Contingency [Line Items]
Effective income tax rate	27.20%	30.10%	27.40%	30.40%
Effective income tax rate reconciliation, at federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Equity investments	$ 0.6	$ 0.0	$ (1.3)	$ 0.0
Restructuring charges	0.0	0.2	0.0	(1.1)
Acquisition-related charges	(3.1)	$ 0.0	(3.1)	$ 0.0
Unrecognized tax benefits	215.5		215.5
Unrecognized tax benefits that would impact effective tax rate	185.2		185.2
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Decrease in unrecognized tax benefit due to closure of audit			14.3
Foreign Country [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Interest and penalties recorded					$ 4.6
Maximum [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Greater than remote likelihood decrease in gross unrecognized tax benefits within next 12 months	$ 3.9		$ 3.9