Pension and Other Benefit Programs (Schedule of Periodic Benefit (Credit) Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost of benefits earned during the period	$ 4.8	$ 5.5
Interest cost on accumulated postretirement benefit obligation	9.0	15.5
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost of benefits earned during the period	0.0	0.0	$ 0.1
Interest cost on accumulated postretirement benefit obligation	1.2	1.9	2.4
Amortization of prior service (credit)	(0.3)	(0.3)	(0.2)
Amortization of net actuarial (gain) loss	(2.2)	(6.6)	(8.5)
Net periodic pension cost (credit)	$ (1.3)	$ (5.0)	$ (6.2)