Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions |
9 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Sep. 30, 2024 |
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| Disaggregation of Revenue [Line Items] | |||
| Contract liabilities | $ 110 | $ 116 | $ 140 |
| Revenue recognized | 99 | $ 118 | |
| Midstream & Marketing | |||
| Disaggregation of Revenue [Line Items] | |||
| Expected revenue | 2,200 | ||
| Utilities | |||
| Disaggregation of Revenue [Line Items] | |||
| Expected revenue | $ 200 | ||
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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