Pension and Other Post-Retirement Benefits - Weighted Average Asset Allocations of Foreign Funded (Details) - Foreign Plan [Member] - Defined Benefit Pension [Member]	Dec. 31, 2020	Dec. 31, 2019
Weighted-average asset allocations of its foreign funded pension plan
Actual plan asset allocations	100.00%	100.00%
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Equity Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Actual plan asset allocations	30.70%	33.40%
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	36.80%
Debt Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Actual plan asset allocations	69.30%	66.60%
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	63.20%