Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Deferred Tax Asset/Liability Related to Advanced Pricing Agreement	$ 44.0
Reconciliation of the total gross unrecognized tax benefits
Balance, January 1	60.4	$ 22.9
Additions based on tax positions related to current year	20.7	19.3
Additions for tax positions of prior years	6.7	22.5
Unrecognized Tax Benefits, Increase Resulting from Acquisition	53.4	0.0
Reductions for closure of tax audits and settlements	(10.4)
Reductions for lapse in statute of limitations	(0.3)	(1.5)
Translation adjustment	(3.2)	(2.8)
Balance, December 31	127.3	60.4
Unrecognized tax benefits that would impact effective tax rate	57.2
Income tax penalties and interest expense	2.3	1.9
Income tax penalties and interest accrued on unrecognized tax benefits	$ 12.8	$ 10.3