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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2023
Disclosure of other provisions, contingent liabilities and contingent assets [Abstract]  
Disclosure of commitments and future payments
In addition to the commitments disclosed elsewhere in the financial statements, the Company has incurred the following contractual commitments, either directly or through its interests in joint operations and joint ventures.
Approximate future payments under these agreements are as follows:
20242025202620272028
2029 and
thereafter
Total
Natural gas, transportation and other contracts55 49 50 48 57 436 695 
Transmission9 9 6 4 5 93 126 
Coal supply agreements86 71 — — — — 157 
Long-term service agreements60 57 42 44 37 184 424 
Operating leases3 3 2 2 2 25 37 
Growth
47 — — — — — 47 
Total260 189 100 98 101 738 1,486