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Derivatives - Cash Flow Hedges (Details) - Cash flow hedge - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Derivatives in Cash Flow Hedging Relationships |  |  |  |
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges | $ 13 |  | $ 13 |
After-tax net unrealized gain (loss) anticipated to be reclassified from AOCI to the income statement within next twelve months |  |  | 84 |
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivative | 66 | $ 173 | 144 | $ 307
Interest rate swap and treasury lock in aggregate |  |  |  |
Derivatives in Cash Flow Hedging Relationships |  |  |  |
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges | (89) |  | (89) |
Foreign currency forward/option contracts |  |  |  |
Derivatives in Cash Flow Hedging Relationships |  |  |  |
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivative | 66 | 173 | 144 | 307
Interest rate contracts |  |  |  |
Derivatives in Cash Flow Hedging Relationships |  |  |  |
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivative | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-11 + Details
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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480870/815-30-50-1 + Details
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