Pensions and Postretirement Benefits Other Than Pensions (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined benefit plan, fair value of pension plan assets	$ 2,145.7	$ 2,051.6
Percent of our projected benefit obligation relates to plans that cannot be funded	600000000.00%
Accumulated benefit obligation for all defined benefit pension plans	$ 2,372.2	2,343.2
Projected benefit obligation	1,928.6	1,850.0
Accumulated benefit obligation	1,902.3	1,847.0
Fair value of plan assets	1,611.0	1,585.6
Net of Medicare Part D subsidy	0.4	0.4
Net periodic benefit cost after net curtailment and settlement (gains) losses	(20.0)	(10.6)	$ (1.6)
Postretirement Benefit Costs [Member]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.6	0.0	0.0
Postretirement benefit cost	0.1
Net periodic benefit cost after net curtailment and settlement (gains) losses	2.3	3.1	5.6
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	13.0
Pension Plans [Member]
Defined benefit plan, fair value of pension plan assets	$ 2,145.7	$ 2,051.6	2,993.8
Discount rate	5.16%	5.51%
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	$ 3.6	$ 3.9	5.0
Projected pension expenses for 2013	46.0
Projected company contributions in 2013	61.0
Plan net actuarial gains (losses)	(63.7)	810.3
Net periodic benefit cost after net curtailment and settlement (gains) losses	54.9	56.2	51.9
Defined Contribution Plan, Employer Discretionary Contribution Amount	165.0	138.0	126.0
Company contributions	$ 93.5	$ 90.5	$ 55.9
Postretirement [Member]
Discount rate	5.17%	5.51%	2.73%
Plan net actuarial gains (losses)	$ 7.4	$ 53.7
Non-U.S. [Member]
Discount rate	4.18%	4.63%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 30.9	$ 33.8	$ 34.9
Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	4.7	3.3
Fixed Income Investments [Member]
Defined benefit plan, fair value of pension plan assets	1,650.0	1,597.8
Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined benefit plan, fair value of pension plan assets	$ 0.0	$ 0.0