MODERNIZATION - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Sep. 30, 2025 |
Mar. 31, 2026 |
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| Minimum | ||
| Modernization Costs [Line Items] | ||
| Outsourced service arrangements, term | 5 years | |
| Maximum | ||
| Modernization Costs [Line Items] | ||
| Outsourced service arrangements, term | 6 years | |
| Service arrangements | ||
| Modernization Costs [Line Items] | ||
| Purchase obligation | $ 131 | |
| Obligation for remainder of 2026 | 31 | |
| Obligation for 2027 | 27 | |
| Obligation for 2028 | 26 | |
| Obligation for 2029 | 26 | |
| Obligation for 2030 | 18 | |
| Obligation thereafter | 3 | |
| Early contract termination fees | $ 25 |
| X | ||||||||||
- Definition The amount of early contract termination fees included in liabilities subject to compromise. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Includes, but is not limited to, lease not yet commenced. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Includes, but is not limited to, lease not yet commenced. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Includes, but is not limited to, lease not yet commenced. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Includes, but is not limited to, lease not yet commenced. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of unrecorded obligation to transfer funds in future for fixed or minimum amount or quantity of product and service at fixed or minimum price. Includes, but is not limited to, lease not yet commenced and take-or-pay and throughput contracts. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in remainder of current fiscal year. No definition available.
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- Definition Term of the unrecognized unconditional purchase obligation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Modernization Costs No definition available.
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- Definition Unrecorded Unconditional Purchase Obligation, After Year Four No definition available.
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