Pension and Postretirement Health Care (Net Periodic Pension Expense (Benefit)) (Details) - USD ($)	1 Months Ended	3 Months Ended
	Aug. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Pension Plan
Amortization
Contribution to pension plan		$ 0	$ 0
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		1,300,000	1,100,000
Interest Cost		900,000	1,200,000
Amortization
Actuarial Loss (Gain)		2,100,000	1,800,000
Prior Service Cost		0	0
Net Periodic Pension Expense		4,300,000	4,100,000
Postretirement Health Care Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		0	0
Interest Cost		100,000	200,000
Amortization
Actuarial Loss (Gain)		(100,000)	(200,000)
Prior Service Cost		(200,000)	0
Net Periodic Pension Expense		(200,000)	0
Amortization period for prior service costs	13 years 10 months 24 days
U.S Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		13,200,000	11,800,000
Interest Cost		9,800,000	10,800,000
Expected Return on Plan Assets		(20,100,000)	(19,200,000)
Amortization
Actuarial Loss (Gain)		9,400,000	8,800,000
Prior Service Cost		(100,000)	(100,000)
Net Periodic Pension Expense		12,200,000	12,100,000
Non U.S. Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		500,000	500,000
Interest Cost		600,000	700,000
Expected Return on Plan Assets		(600,000)	(700,000)
Settlement Expense		200,000	200,000
Amortization
Actuarial Loss (Gain)		300,000	300,000
Prior Service Cost		0	0
Net Periodic Pension Expense		$ 1,000,000.0	$ 1,000,000.0