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Leases - Schedule of Lease Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Finance Leases    
Accounts payable and accrued liabilities $ 72 $ 76
Long-term finance lease obligations 1,291 1,305
Total lease obligations 1,363 1,381
Operating Leases    
Accounts payable and accrued liabilities 53 60
Long-term operating lease obligations 677 692
Total lease obligations $ 730 $ 752