Pension and Other Benefit Programs (Schedule of Amounts Recognized in Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension costs	$ 84.6	$ 83.2
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension costs	84.6	83.2
Accounts payable and accrued expenses	(2.7)	(2.7)
Postretirement benefit liabilities	0.0	0.0
Pension benefit liabilities	(25.0)	(25.9)
Net amount recognized	56.9	54.6
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension costs	0.0	0.0
Accounts payable and accrued expenses	(0.1)	(0.1)
Postretirement benefit liabilities	0.0	0.0
Pension benefit liabilities	(1.9)	(1.7)
Net amount recognized	(2.0)	(1.8)
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension costs	0.0	0.0
Accounts payable and accrued expenses	(5.2)	(7.1)
Postretirement benefit liabilities	(42.4)	(54.8)
Pension benefit liabilities	0.0	0.0
Net amount recognized	$ (47.6)	$ (61.9)