Equity Items - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Equity [Abstract] | ||||
| Unrealized translation (loss) gain, before tax | $ 4 | $ 92 | $ (5) | $ 46 |
| Unrealized translation (loss) gain, tax | 0 | (1) | (1) | 0 |
| Unrealized translation (loss) gain , net of tax | 4 | 91 | (6) | 46 |
| Unrealized (loss) gain on commodity hedges, before tax | (2) | (1) | (2) | 3 |
| Unrealized (loss) gain on commodity hedges, tax | 0 | 0 | 0 | (1) |
| Unrealized (loss) gain on commodity hedges, net of tax | (2) | (1) | (2) | 2 |
| Total other comprehensive income (loss), before tax | 2 | 91 | (7) | 49 |
| Total other comprehensive income (loss), tax | 0 | (1) | (1) | (1) |
| Other comprehensive income (loss) - Note N | $ 2 | $ 90 | $ (8) | $ 48 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount before tax, after reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount before tax, after 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://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after tax and 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://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of tax expense (benefit), after 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://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|