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Charges and Credits - Summary of Charges and Credits (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2024
Charges And Credits [Line Items] |  |  |  |  |  |
Charges and credits, Pretax Charge |  |  |  |  |  | $ 279,000,000
Charges and credits, Tax Benefit |  |  |  |  |  | 48,000,000
Charges and credits, Noncontrolling Interests |  |  |  |  |  | 20,000,000
Charges and credits, Net |  |  |  | $ 0 | $ 0 | $ 211,000,000
Interest And Other | Workforce reductions |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |
Charges and credits, Pretax Charge | $ 65,000,000 | $ 111,000,000 |  |  |  |
Charges and credits, Tax Benefit | 10,000,000 | 17,000,000 |  |  |  |
Charges and credits, Net | 55,000,000 | 94,000,000 |  |  |  |
Interest And Other | Merger & integration |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |
Charges and credits, Pretax Charge | 47,000,000 | 31,000,000 | $ 25,000,000 |  |  |
Charges and credits, Tax Benefit | 10,000,000 | 5,000,000 | 6,000,000 |  |  |
Charges and credits, Noncontrolling Interests | 7,000,000 | 8,000,000 | 5,000,000 |  |  |
Charges and credits, Net | $ 30,000,000 | $ 18,000,000 | $ 14,000,000 |  |  |

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- Definition Charges and credits tax. + References No definition available. + Details
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