Fair Value Measurements (Financial Instruments' Carrying Amounts and Fair Values) (Parenthetical) (Detail) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Supplemental line of credit facility borrowings expiration period | 1 year | |
| Valuation of certain fair value hedges associated with fixed rate debt | $ 0 | $ 0 |
| X | ||||||||||
- Definition Supplemental line of credit facility expiration period. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Fair value of all derivatives designated as interest rate fair value hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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