Debt Obligations (Revolving Credit Agreement) (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Revolving Credit Agreement [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-Term Line of Credit, Noncurrent | $ 0 | $ 0 |
| Revolving Credit Facility due June 2030 | ||
| Debt Instrument [Line Items] | ||
| Letters of Credit Outstanding, Amount | 183 | |
| Line of Credit Facility, Current Borrowing Capacity | $ 2,500 | |
| Line of Credit Facility, Remaining Borrowing Capacity | $ 2,320 | |
| Line of Credit Facility, Interest Rate at Period End | 5.46% | |
| NuStar Credit Facility | ||
| Debt Instrument [Line Items] | ||
| Long-Term Line of Credit, Noncurrent | $ 0 |
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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 The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The effective interest rate at the end of the reporting period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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