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Accumulated Other Comprehensive Loss (Summary of Changes in AOCI) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax | $ (1,005) | $ 49 | $ 710 | $ (3,211)
Other comprehensive (loss) income, net - Foreign Currency Translation | (1,050) | (647) | 609 |
Amounts reclassified, pretax - Foreign Currency Translation | 2 | 0 | 0 |
Tax benefit (expense) | (6) | (14) | 25 |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Impact of Separation of Carrier and Otis, net of Tax |  |  | 3,287 |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax | (782) | (1,828) | (4,483) | (6,772)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax | 1,225 | 3,210 | 1,842 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 129 | 258 | 373 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax | (308) | (813) | (510) |
Other Comprehensive Income (Loss), Defined Benefit Plan, Impact of Separation of Carrier and Otis, net of Tax |  |  | 584 |
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax | (231) | (136) | 39 | (166)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax | (246) | (226) | 181 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax | 103 | (28) | 82 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax | 48 | 79 | (62) |
Other Comprehensive Income (Loss), Cash Flow Hedge, Impact of Separation of Carrier and Otis, net of Tax |  |  | 4 |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (2,018) | (1,915) | (3,734) | $ (10,149)
Other comprehensive (loss) income before reclassifications, net | (71) | 2,337 | 2,632 |
Amounts reclassified, pretax | 234 | 230 | 455 |
Other Comprehensive Income (Loss), Tax | $ 266 | $ 748 | 547 |
Other Comprehensive Income (Loss), Impact of Separation of Carrier and Otis, net of Tax |  |  | $ 3,875 |

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X
- Definition Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 + Details
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