Financing Arrangement - Carrying Values Of Liability And Equity Components Of Notes (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
Feb. 28, 2021 |
Feb. 29, 2016 |
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| Debt Instrument [Line Items] | ||||
| Net carrying value of Senior Notes | $ 1,485 | $ 1,884 | ||
| 2026 Notes | ||||
| Debt Instrument [Line Items] | ||||
| Long-term debt | 0 | 400 | $ 400 | |
| 2031 Notes | ||||
| Debt Instrument [Line Items] | ||||
| Long-term debt | 750 | 750 | $ 750 | |
| 2051 Notes | ||||
| Debt Instrument [Line Items] | ||||
| Long-term debt | 750 | 750 | 750 | |
| Senior Notes | ||||
| Debt Instrument [Line Items] | ||||
| Long-term debt | 1,500 | 1,900 | ||
| Unaccreted discount | (4) | (5) | 6 | 1 |
| Unamortized debt issuance costs | (11) | (11) | $ (16) | $ (4) |
| Fair value of Senior Notes (Level 2) | $ 1,292 | $ 1,511 |
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- 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/disclosureRef
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- Definition Amount, after accumulated amortization, of debt discount (premium). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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