Derivative Instruments and Fair Value Accounting FX Hedge (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Foreign Currency Fair Value Hedge Derivative [Line Items]
Total stockholders' equity		$ 1,295.6	$ 1,967.9	$ 1,296.8	$ 2,016.0
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative, Notional Amount		35.0
Derivative Asset		1.4
Foreign Exchange Contract [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member]
Foreign Currency Fair Value Hedge Derivative [Line Items]
Total stockholders' equity		(1.5)
Foreign Exchange Contract [Member] | Interest Expense [Member] | Designated as Hedging Instrument [Member]
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0.2	$ (3.7)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[1]	$ (1.5)

[1] Based on the fair value of open hedges as of March 31, 2022.