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Acquisitions and Other Transactions (Announced Divestiture of Rockies Operations - Assets and Liabilities Held for Sale) (Details) - Rockies - Disposal Group, Not Discontinued Operations
$ in Millions
Sep. 30, 2025
USD ($)
Assets  
Receivables, less allowance for expected credit loss $ 28
Inventories 25
Equity method investments 123
Property, plant and equipment, net of accumulated depreciation of $340 788
Intangibles, net of accumulated amortization of $178 68
Right of use assets, net 2
Total assets classified as held for sale 1,034
Liabilities  
Accounts payable 20
Accrued liabilities 7
Operating lease liabilities 1
Other current liabilities 19
Long-term deferred revenue 182
Other long-term liabilities 1
Total liabilities classified as held for sale 230
Accumulated depreciation 340
Accumulated amortization $ 178