Pension Plans, Postretirement and Other Employee Benefits - Pension Plan Assets Classes of Securities (Details)	Dec. 31, 2020
U.S. | Equity securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	66.00%
U.S. | Fixed income securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	12.00%
U.S. | Debt Securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	12.00%
U.S. | Insurance contracts
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	0.00%
U.S. | Other
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	10.00%
Non-U.S. | Equity securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	26.00%
Non-U.S. | Fixed income securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	2.00%
Non-U.S. | Debt Securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	46.00%
Non-U.S. | Insurance contracts
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	20.00%
Non-U.S. | Other
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	6.00%