Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions |
3 Months Ended | |||
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Mar. 31, 2021 |
Sep. 30, 2020 |
Mar. 31, 2020 |
Sep. 30, 2019 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| Balance as of beginning of period, value | $ 963 | $ 1,212 | ||
| Balance as of beginning of period | (52) | (27) | ||
| Period change | 0 | (3) | ||
| Period change | 14 | (36) | ||
| Period change | 14 | $ 14 | (39) | $ (39) |
| Balance as of end of period | (38) | (66) | ||
| Balance as of end of period, value | 991 | $ 991 | $ 1,112 | |
| Cash Flow Hedges | ||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| Balance as of beginning of period, value | (54) | (26) | ||
| Balance as of end of period, value | (40) | (62) | ||
| Foreign Currency Translation Adjustments | ||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| Balance as of beginning of period, value | 2 | (1) | ||
| Balance as of end of period, value | $ 2 | $ (4) | ||
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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. No definition available.
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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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