Pension and Other Benefit Programs (Schedule of Net Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations as of beginning of period	$ 435.1	$ 441.7
Defined Benefit Plan, Service Cost	3.7	4.8
Defined Benefit Plan, Interest Cost	10.5	9.0
Actuarial (gain) loss	(99.8)	(10.9)
Benefits paid	(12.4)	(9.5)
Benefit obligations as of end of period	337.1	435.1	$ 441.7
Fair value of plan assets as of beginning of period	506.7	520.7
Actual return on plan assets	(105.4)	(7.4)
Employer contributions	2.8	2.9
Benefits paid	(12.4)	(9.5)
Fair value of plan assets as of end of period	391.7	506.7	520.7
Funded status	54.6	71.6
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations as of beginning of period	78.0	81.4
Defined Benefit Plan, Interest Cost	1.5	1.2	1.9
Plan participants' contributions	1.6	1.9
Actuarial (gain) loss	(12.4)	2.0
Benefits paid	(6.8)	(8.5)
Benefit obligations as of end of period	61.9	78.0	$ 81.4
Fair value of plan assets as of beginning of period	0.0
Employer contributions	5.2	6.6
Plan participants' contributions	1.6	1.9
Benefits paid	(6.8)	(8.5)
Fair value of plan assets as of end of period	0.0	0.0
Funded status	$ (61.9)	$ (78.0)