Other Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 268.8	$ 408.5	$ 312.0	$ 174.8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(423.1)	(322.3)	$ (293.7)
Other Current Liabilities
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Redeemable Financial Liability	$ 129.1	$ 173.0