Benefit Obligations (Schedule of Weighted Average Target Asset Allocations) (Details)	12 Months Ended
	Dec. 31, 2016
United States Pension Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	100.00%
United States Pension Plan of US Entity [Member] | Bonds - Domestic to Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	54.00%
United States Pension Plan of US Entity [Member] | Equities - Domestic to Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	26.00%
United States Pension Plan of US Entity [Member] | Equities - International to Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	20.00%
United States Pension Plan of US Entity [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	0.00%
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	100.00%
Foreign Pension Plan [Member] | Bonds - Domestic to Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	58.00%
Foreign Pension Plan [Member] | Equities - Domestic to Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	16.00%
Foreign Pension Plan [Member] | Equities - International to Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	0.00%
Foreign Pension Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	26.00%