Pension and Postretirement Health Care (Net Periodic Pension Expense (Benefit)) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Pension Plan
Amortization
Contribution to pension plan			$ 50,000,000	$ 0
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 1,100,000	$ 900,000	2,200,000	1,800,000
Interest Cost	1,400,000	1,300,000	2,700,000	2,600,000
Amortization
Net Actuarial Loss (Gain)	1,800,000	1,400,000	3,600,000	2,800,000
Prior Service Cost	100,000	0	100,000	0
Net Periodic Pension Expense	4,400,000	3,600,000	8,600,000	7,200,000
Postretirement Health Care Plan
Defined Benefit plan Net periodic benefit cost
Interest Cost	400,000	400,000	700,000	800,000
Amortization
Net Periodic Pension Expense	400,000	400,000	700,000	800,000
U.S. Plan | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	10,300,000	9,600,000	20,700,000	19,200,000
Interest Cost	11,100,000	11,500,000	22,200,000	23,000,000
Expected Return on Plan Assets	(22,100,000)	(23,500,000)	(44,100,000)	(47,000,000)
Amortization
Net Actuarial Loss (Gain)	7,000,000	4,800,000	14,100,000	9,600,000
Prior Service Cost	(100,000)	(100,000)	(200,000)	(200,000)
Net Periodic Pension Expense	6,200,000	2,300,000	12,700,000	4,600,000
Non U.S. Plans | Pension Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	400,000	0	800,000	0
Interest Cost	1,000,000	1,000,000	2,000,000	1,900,000
Expected Return on Plan Assets	(1,100,000)	(1,100,000)	(2,200,000)	(2,200,000)
Settlement Expense	400,000	200,000	400,000	200,000
Amortization
Net Actuarial Loss (Gain)	300,000	300,000	600,000	600,000
Net Periodic Pension Expense	$ 1,000,000	$ 400,000	$ 1,600,000	$ 500,000