Pension Plans and Other Post Employment Benefit Plans Target Allocation for Plan Assets (Details) - Pension Plan	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	100.00%	100.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	50.00%	50.00%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	2.00%	2.00%
Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	8.00%	8.00%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	3.00%	3.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	2.00%	2.00%
UNITED STATES | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	19.00%	17.00%
Non-US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	16.00%	18.00%