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Changes in Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Components of comprehensive income (loss), net of tax | Changes in each component for the three and nine months ended September 30, 2023 and 2022 were as follows:
Three Months Ended September 30, 2023 (Millions), net of tax |  | Net Unrealized Gains (Losses) on Debt Securities |  | Foreign Currency Translation Adjustment Gains (Losses), net of hedges (a) |  | Net Unrealized Pension and Other Postretirement Benefit Gains (Losses) |  | Accumulated Other Comprehensive Income (Loss)
Balances as of June 30, 2023 |  | $ | (44) |  |  | $ | (2,569) |  |  | $ | (471) |  |  | $ | (3,084) |
Net change |  | 14 |  |  | (110) |  |  | 4 |  |  | (92) |
Balances as of September 30, 2023 |  | $ | (30) |  |  | $ | (2,679) |  |  | $ | (467) |  |  | $ | (3,176) |
Nine Months Ended September 30, 2023 (Millions), net of tax |  | Net Unrealized Gains (Losses) on Debt Securities |  | Foreign Currency Translation Adjustment Gains (Losses), net of hedges (a) |  | Net Unrealized Pension and Other Postretirement Benefit Gains (Losses) |  | Accumulated Other Comprehensive Income (Loss)
Balances as of December 31, 2022 |  | $ | (64) |  |  | $ | (2,622) |  |  | $ | (524) |  |  | $ | (3,210) |
Net change |  | 34 |  |  | (57) |  |  | 57 |  |  | 34 |
Balances as of September 30, 2023 |  | $ | (30) |  |  | $ | (2,679) |  |  | $ | (467) |  |  | $ | (3,176) |
Three Months Ended September 30, 2022 (Millions), net of tax |  | Net Unrealized Gains (Losses) on Debt Securities |  | Foreign Currency Translation Adjustment Gains (Losses), net of hedges (a) |  | Net Unrealized Pension and Other Postretirement Benefit Gains (Losses) |  | Accumulated Other Comprehensive Income (Loss)
Balances as of June 30, 2022 |  | $ | (30) |  |  | $ | (2,569) |  |  | $ | (544) |  |  | $ | (3,143) |
Net change |  | (39) |  |  | (200) |  |  | 5 |  |  | (234) |
Balances as of September 30, 2022 |  | $ | (69) |  |  | $ | (2,769) |  |  | $ | (539) |  |  | $ | (3,377) |
Nine Months Ended September 30, 2022 (Millions), net of tax |  | Net Unrealized Gains (Losses) on Debt Securities |  | Foreign Currency Translation Adjustment Gains (Losses), net of hedges (a) |  | Net Unrealized Pension and Other Postretirement Benefit Gains (Losses) |  | Accumulated Other Comprehensive Income (Loss)
Balances as of December 31, 2021 |  | $ | 23 |  |  | $ | (2,392) |  |  | $ | (576) |  |  | $ | (2,945) |
Net change |  | (92) |  |  | (377) |  |  | 37 |  |  | (432) |
Balances as of September 30, 2022 |  | $ | (69) |  |  | $ | (2,769) |  |  | $ | (539) |  |  | $ | (3,377) |
(a)Refer to Note 8 for additional information on hedging activity.
AOCI income tax effect | The following table shows the tax impact for the three and nine months ended September 30 for the changes in each component of AOCI presented above:
|  | Tax expense (benefit)
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(Millions) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Net unrealized gains (losses) on debt securities |  | $ | 5 |  |  | $ | (13) |  |  | $ | 11 |  |  | $ | (29) |
Foreign currency translation adjustment, net of hedges |  | 66 |  |  | 169 |  |  | (32) |  |  | 231 |
Pension and other postretirement benefits |  | 6 |  |  | 16 |  |  | 6 |  |  | 33 |
Total tax impact |  | $ | 77 |  |  | $ | 172 |  |  | $ | (15) |  |  | $ | 235 |

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 1 -Section 45 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-1 + Details
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