Pension and Postretirement Health Care (Net Periodic Pension Expense (Benefit)) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Amortization
Payment for settlement	$ 6,900,000		$ 24,500,000
Postretirement Health Care Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service Cost	0	$ 0	0	$ 0
Interest Cost	0	200,000	200,000	600,000
Amortization
Actuarial Loss (Gain)	0	(100,000)	(100,000)	(500,000)
Prior Service Cost	(200,000)	(100,000)	(700,000)	(100,000)
Total Pension Expense	(200,000)	0	(600,000)	0
U.S Plans | Pension Plan | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service Cost	13,100,000	11,900,000	39,500,000	35,500,000
Interest Cost	10,400,000	10,800,000	30,000,000.0	32,400,000
Expected Return on Plan Assets	(20,000,000.0)	(19,200,000)	(60,200,000)	(57,600,000)
Amortization
Actuarial Loss (Gain)	7,100,000	8,800,000	25,900,000	26,400,000
Prior Service Cost	(100,000)	(100,000)	(300,000)	(300,000)
Total Pension Expense	10,500,000	12,200,000	34,900,000	36,400,000
Settlement Expense	6,900,000	0	24,500,000	0
Total Pension Expense	$ 17,400,000	12,200,000	$ 59,400,000	36,400,000
Discount rate	3.06%		3.06%
Expected long-term rate of return on plan assets			5.00%
Settlement expense			$ 81,600,000
Benefit obligation	$ 1,389,000,000		1,389,000,000		$ 1,470,600,000
Defined benefit plan, plan assets, period decrease			26,000,000
Contribution to pension plan			0	0
U.S Plans | Pension Plan | Non-Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service Cost	1,300,000	1,200,000	3,900,000	3,400,000
Interest Cost	900,000	1,200,000	2,800,000	3,600,000
Amortization
Actuarial Loss (Gain)	2,100,000	1,700,000	6,200,000	5,300,000
Prior Service Cost	100,000	0	100,000	100,000
Total Pension Expense	4,400,000	4,100,000	13,000,000.0	12,400,000
Contribution to pension plan			6,700,000	10,600,000
Non U.S. Plans | Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service Cost	500,000	600,000	1,600,000	1,600,000
Interest Cost	500,000	700,000	1,600,000	2,100,000
Expected Return on Plan Assets	(600,000)	(800,000)	(1,900,000)	(2,300,000)
Amortization
Actuarial Loss (Gain)	300,000	200,000	800,000	800,000
Prior Service Cost	0	100,000	100,000	100,000
Total Pension Expense	700,000	800,000	2,200,000	2,300,000
Settlement Expense	(200,000)	100,000	700,000	300,000
Total Pension Expense	$ 500,000	$ 900,000	$ 2,900,000	$ 2,600,000