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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Contractual Obligation, Fiscal Year Maturity
As of December 31, 2023, we had minimum contractual commitments under long-term service and maintenance contracts, energy-related contracts and other agreements as follows:
Long-Term Service and Maintenance Contracts (a)Coal transportation agreementsPipeline transportation and storage reservation feesWater
Contracts
2024$286 $33 $179 $
2025242 34 182 
2026228 35 192 
2027250 36 195 
2028310 — 194 
Thereafter2,091 — 96 44 
Total$3,407 $138 $1,038 $89 
____________
(a)Long-term service and maintenance contracts reflect expected expenditures as these contracts do not include minimum spending requirements, but can only be terminated based on events outside the control of the Company.