Pension Plans - Asset Allocations (Details) - Foreign Plan	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocations	100.00%	100.00%
Equity securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocations	0.00%	0.00%
Debt securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocations	20.00%	28.00%
Insurance arrangements
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocations	62.00%	53.00%
Cash
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocations	0.00%	0.00%
Other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocations	18.00%	19.00%