Postretirement Benefits Postretirement Benefits (Discount Rates Used To Determine Net Cost Other) (Details)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	[1]	4.03%	4.05%	4.10%

[1] Represents the weighted average rate for the U.S. qualified plans in 2017 and 2016 due to the remeasurements