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Supplemental Financial Information - Other Non-Current Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Voluntary Separation Program | $ 190 | $ 233
Postretirement obligation | 334 | 330
Other deferred compensation | 302 | 369
Other | 270 | 292
Other noncurrent liabilities | 1,096 | 1,224
Unusual or Infrequent Item, or Both [Line Items] |  |
Taxes receivable | $ 219 | 699
CARES Act |  |
Unusual or Infrequent Item, or Both [Line Items] |  |
Taxes receivable |  | $ 472

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