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Financial Instruments - Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Foreign exchange contracts |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | $ 1,407 | $ 1,160
Interest rate caps |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 15,146 | 14,219
Interest rate caps | Subsidiary Issuers |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 5,900 | 6,200
Interest rate swaps |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 750 | 1,450
Interest rate caps sold |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 10,300 | 9,800
Purchase |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | $ 4,900 | $ 4,400

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A + Details
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