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Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | $ 17,655 |
Net current period other comprehensive income (loss) | $ (479) | $ (977) | (138) | $ (1,764)
Balance, end of period | 16,978 |  | 16,978 |
Foreign Currency Translation Adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | (2,066) | (1,133)
OCI before reclassifications |  |  | (175) | (1,770)
Reclassifications due to business divestitures |  |  | 43 |
Amounts reclassified from AOCI |  |  | 0 | 0
Net current period other comprehensive income (loss) |  |  | (132) | (1,770)
Balance, end of period | (2,198) | (2,903) | (2,198) | (2,903)
Gains (Losses) on Derivatives Qualifying as Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | 1 | 1
OCI before reclassifications |  |  | 0 | 0
Reclassifications due to business divestitures |  |  | 0 |
Amounts reclassified from AOCI |  |  | 0 | 0
Net current period other comprehensive income (loss) |  |  | 0 | 0
Balance, end of period | 1 | 1 | 1 | 1
Pension and Postretirement Liability Adjustment |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | (133) | (291)
OCI before reclassifications |  |  | (2) | (2)
Reclassifications due to business divestitures |  |  | (1) |
Amounts reclassified from AOCI |  |  | 3 | (8)
Net current period other comprehensive income (loss) |  |  | (6) | 6
Balance, end of period | (139) | (285) | (139) | (285)
AOCI Attributable to Parent |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | (2,198) | (1,423)
OCI before reclassifications |  |  | (177) | (1,772)
Reclassifications due to business divestitures |  |  | 42 |
Amounts reclassified from AOCI |  |  | 3 | (8)
Net current period other comprehensive income (loss) |  |  | (138) | (1,764)
Balance, end of period | $ (2,336) | $ (3,187) | $ (2,336) | $ (3,187)

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