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Employee Benefit Plans - Amounts Recognized in the Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Noncurrent assets	$ 27.6	$ 20.2
Liability, Defined Benefit Pension Plan, Current	(6.6)	(8.0)
Defined benefit pension plan, liabilities, noncurrent	(121.3)	(141.2)
Defined benefit plan, amounts recognized in balance sheet	(100.3)	(129.0)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Noncurrent assets	0.0	0.0
Postemployment Benefits Liability, Current	(28.4)	(29.8)
Other postretirement defined benefit plan, liabilities, noncurrent	(481.2)	(556.7)
Other postretirement defined benefit plan, liabilities	$ (509.6)	$ (586.5)

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Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as current. Excludes other postretirement benefit plan.

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Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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