Pension and Other Benefit Programs (Schedule of Periodic Benefit (Credit) Costs for U.S. Defined Benefit Pension Plans) (Details) - U.S. Pension Plans [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost of benefits earned during the period	$ 5.5	$ 4.8	$ 5.7
Interest cost on projected benefit obligation	15.5	50.3	46.1
Expected return on plan assets	(34.5)	(80.1)	(95.9)
Amortization of net actuarial (gain) loss	6.3	19.2	20.0
Settlement	374.4
Special termination benefits	2.0
Net periodic pension cost (credit)	$ 369.2	$ (5.8)	$ (24.1)