Income Taxes (Details ) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income before income taxes:
United States	$ 161.4	$ 152.8	$ 145.8
Foreign	811.1	693.8	633.0
Income before income taxes	972.5	846.6	778.8
Current tax provision:
United States	63.7	47.5	54.6
Foreign	183.1	162.3	163.1
Provision for income taxes, current	246.8	209.8	217.7
Deferred tax provision (benefit):
United States	(0.7)	(0.1)	7.7
Foreign	11.2	(1.8)	(6.1)
Provision for income taxes, deferred	10.5	(1.9)	1.6
Provision for income taxes	257.3	207.9	219.3
Foreign tax loss and credit carryforwards	60.3
U.S. federal loss carryforwards	16.9
U.S. state tax loss and credit carryforwards net of federal benefit	4.4
Foreign tax losses and credit carry forwards that will either expire or be refunded at various dates through 2029	28.8
Federal tax credit carry forwards that will either expire or be refunded at various dates through 2029	16.9
State tax credit carry forwards, net of federal benefits will either expire or be refunded at various dates through 2029	0.1
Valuation allowance, related to the foreign net operating loss carryforwards and U.S. state tax credits	15.5	19.4
Change in the valuation allowance, related to foreign net operating loss and foreign and U.S. state credit carryforwards	$ (3.9)	$ 1.5