Pension and Postretirement Health Care (Net Periodic Pension Expense (Benefit)) (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Amortization
Defined benefit plan, benefit obligation, increase (decrease) for plan amendment	$ 12,600,000
Defined benefit plan, benefit obligation, increase (decrease) for amortization period adjustment	$ 300,000	$ (97,500,000)	$ (87,600,000)	$ (285,800,000)	$ (262,600,000)
Pension Plan
Amortization
Contribution to pension plan				0	0
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		1,200,000	1,100,000	3,400,000	3,100,000
Interest Cost		1,200,000	1,500,000	3,600,000	4,400,000
Amortization
Net Actuarial Loss (Gain)		1,700,000	1,400,000	5,300,000	4,200,000
Prior Service Cost		0	0	100,000	100,000
Net Periodic Pension Expense		4,100,000	4,000,000.0	12,400,000	11,800,000
Postretirement Health Care Plan
Defined Benefit plan Net periodic benefit cost
Interest Cost		200,000	300,000	600,000	900,000
Amortization
Net Actuarial Loss (Gain)		(100,000)	(200,000)	(500,000)	(800,000)
Prior Service Cost		(100,000)	0	(100,000)	0
Net Periodic Pension Expense		0	100,000	0	100,000
U.S Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		11,900,000	10,400,000	35,500,000	31,200,000
Interest Cost		10,800,000	11,800,000	32,400,000	35,400,000
Expected Return on Plan Assets		(19,200,000)	(21,700,000)	(57,600,000)	(65,100,000)
Amortization
Net Actuarial Loss (Gain)		8,800,000	4,300,000	26,400,000	12,900,000
Prior Service Cost		(100,000)	(100,000)	(300,000)	(300,000)
Net Periodic Pension Expense		12,200,000	4,700,000	36,400,000	14,100,000
Non U.S. Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		600,000	500,000	1,600,000	1,500,000
Interest Cost		700,000	900,000	2,100,000	2,900,000
Expected Return on Plan Assets		(800,000)	(1,000,000.0)	(2,300,000)	(2,900,000)
Settlement Expense		100,000	0	300,000	0
Amortization
Net Actuarial Loss (Gain)		200,000	200,000	800,000	500,000
Prior Service Cost		100,000	0	100,000	0
Net Periodic Pension Expense		$ 900,000	$ 600,000	$ 2,600,000	$ 2,000,000.0