Pension Plans and Other Post Employment Benefit Plans Target Allocation for Plan Assets (Details)	Dec. 31, 2020	Dec. 31, 2019
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	51.00%	50.00%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	2.00%	3.00%
Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	6.00%	6.00%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	4.00%	3.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	1.00%	2.00%
UNITED STATES | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	20.00%	20.00%
Non-US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation for plan assets	16.00%	16.00%