Pension and Postretirement Health Care (Net Periodic Pension Expense (Benefit)) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Plan
Amortization
Contribution to pension plan			$ 0	$ 50,000,000
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 1,100,000	$ 1,000,000.0	3,100,000	3,200,000
Interest Cost	1,500,000	1,300,000	4,400,000	4,000,000.0
Amortization
Net Actuarial Loss (Gain)	1,400,000	1,900,000	4,200,000	5,500,000
Prior Service Cost	0	100,000	100,000	200,000
Net Periodic Pension Expense	4,000,000.0	4,300,000	11,800,000	12,900,000
Postretirement Health Care Plan
Defined Benefit plan Net periodic benefit cost
Interest Cost	300,000	300,000	900,000	1,000,000.0
Amortization
Net Actuarial Loss (Gain)	(200,000)	0	(800,000)	0
Net Periodic Pension Expense	100,000	300,000	100,000	1,000,000.0
U.S. Plan | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	10,400,000	10,400,000	31,200,000	31,100,000
Interest Cost	11,800,000	11,100,000	35,400,000	33,300,000
Expected Return on Plan Assets	(21,700,000)	(22,100,000)	(65,100,000)	(66,200,000)
Amortization
Net Actuarial Loss (Gain)	4,300,000	7,000,000.0	12,900,000	21,100,000
Prior Service Cost	(100,000)	(100,000)	(300,000)	(300,000)
Net Periodic Pension Expense	4,700,000	6,300,000	14,100,000	19,000,000.0
Non U.S. Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	500,000	400,000	1,500,000	1,200,000
Interest Cost	900,000	1,000,000.0	2,900,000	3,000,000.0
Expected Return on Plan Assets	(1,000,000.0)	(1,100,000)	(2,900,000)	(3,300,000)
Settlement Expense	0	0	0	400,000
Amortization
Net Actuarial Loss (Gain)	200,000	300,000	500,000	900,000
Net Periodic Pension Expense	$ 600,000	$ 600,000	$ 2,000,000.0	$ 2,200,000