Pension and Postretirement Health Care (Net Periodic Pension Expense (Benefit)) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Plan
Amortization
Contribution to pension plan			$ 50,000,000	$ 0
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 1,000,000	$ 1,000,000	3,200,000	2,800,000
Interest Cost	1,300,000	1,300,000	4,000,000	3,900,000
Amortization
Net Actuarial Loss (Gain)	1,900,000	1,500,000	5,500,000	4,300,000
Prior Service Cost	100,000	100,000	200,000	100,000
Net Periodic Pension Expense	4,300,000	3,900,000	12,900,000	11,100,000
Postretirement Health Care Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	0	100,000	0	100,000
Interest Cost	300,000	300,000	1,000,000	1,100,000
Amortization
Net Periodic Pension Expense	300,000	400,000	1,000,000	1,200,000
U.S. Plan | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	10,400,000	9,600,000	31,100,000	28,800,000
Interest Cost	11,100,000	11,400,000	33,300,000	34,400,000
Expected Return on Plan Assets	(22,100,000)	(23,400,000)	(66,200,000)	(70,400,000)
Amortization
Net Actuarial Loss (Gain)	7,000,000	4,700,000	21,100,000	14,300,000
Prior Service Cost	(100,000)	(100,000)	(300,000)	(300,000)
Net Periodic Pension Expense	6,300,000	2,200,000	19,000,000	6,800,000
Non U.S. Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	400,000	0	1,200,000	0
Interest Cost	1,000,000	1,000,000	3,000,000	2,900,000
Expected Return on Plan Assets	(1,100,000)	(1,100,000)	(3,300,000)	(3,300,000)
Settlement Expense	0	700,000	400,000	900,000
Amortization
Net Actuarial Loss (Gain)	300,000	400,000	900,000	1,000,000
Net Periodic Pension Expense	$ 600,000	$ 1,000,000	$ 2,200,000	$ 1,500,000