Fair Value - Fair Value of Financial Instruments and Assets Measured on a Nonrecurring Basis (Details) - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Fair Value of Financial Instruments [Line Items]
Short-Term and Long-Term Debt - Carrying Amount	[1]	$ 1,956.1	$ 1,986.4
Level 2 [Member]
Fair Value of Financial Instruments [Line Items]
Short-Term and Long-Term Debt - Fair Value	[1]	$ 1,962.9	$ 2,192.6

[1] Excludes unamortized debt issuance costs.