Debt - Tax-Exempt Financings and Finance Leases and Other (Details) - USD ($) $ in Millions |
4 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Debt Instrument [Line Items] | ||||||
| Restricted cash and marketable securities | $ 285 | $ 285 | $ 259 | $ 224 | $ 208 | |
| Finance leases and other | 443 | 443 | 441 | |||
| Arizona | ||||||
| Debt Instrument [Line Items] | ||||||
| Finance leases and other | 156 | 156 | 148 | |||
| Tax-exempt | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt | 1,412 | 1,412 | 1,369 | |||
| Principal | 1,422 | 1,422 | $ 1,378 | |||
| Solid Waste Disposal Revenue Bonds | ||||||
| Debt Instrument [Line Items] | ||||||
| Principal | $ 100 | |||||
| Cost incurred and subsequently reimbursed | 89 | |||||
| Restricted cash and marketable securities | 11 | 11 | ||||
| Tax exempt bond | ||||||
| Debt Instrument [Line Items] | ||||||
| Principal | $ 250 | $ 250 | ||||
| Debt instrument, term | 10 years |
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- Definition Cost Incurred and Subsequently Reimbursed Through Revenue Bonds No definition available.
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- Definition Finance Lease, Liability And Other No definition available.
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. 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 Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. No definition available.
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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://www.xbrl.org/2003/role/disclosureRef
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- Definition The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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