Income Taxes Change in Valuation Allowances (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Valuation Allowances
Beginning balance		$ 275.1	$ 332.2	$ 467.3
Reversed to costs and expenses		(15.4)	(20.8)	(72.8)
Charged (reversed) to gross tax assets and other accounts 1	[1]	9.5	(9.2)	(26.4)
Foreign currency translation		(13.6)	(27.1)	(35.9)
Ending balance		255.6	275.1	$ 332.2
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards		1,012.3
Deferred Tax Liabilities, Undistributed Foreign Earnings		2,622.4	$ 2,592.4
Foreign Tax Authority
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration		889.1
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		123.2
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		$ 55.6
Minimum | Foreign Tax Authority
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards, Expiration Date		Jan. 01, 2017
Minimum | State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards, Expiration Date		Jan. 01, 2017
Maximum | Foreign Tax Authority
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2036
Maximum | State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2036

[1] Primarily represents changes to the valuation allowance related to the change of a corresponding deferred tax asset.