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Supplemental Financial Information - Other Non-Current Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Voluntary Separation Program $ 211 $ 233
Postretirement obligation 333 330
Other deferred compensation 334 369
Other 282 292
Other noncurrent liabilities $ 1,160 $ 1,224