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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
Commitments under coal, gas and transportation contractual agreements
As of December 31, 2022, the Company's minimum commitments under such outstanding agreements are estimated as follows:
Period(In millions)
2023$110 
202471 
202583 
202654 
202778 
Thereafter56 
Total(a)
$452 
(a)Actual fuel and transportation purchases are significantly higher than these estimated minimum unconditional long-term firm commitments with remaining term in excess of one year
Minimum purchase commitment obligations under purchased power agreements These contracts are not included in the consolidated balance sheet as of December 31, 2022. Minimum purchase commitment obligations are as follows as of December 31, 2022:
Period(In millions)
2023$908 
20241,050 
2025662 
2026396 
2027296 
Thereafter987 
Total(a)
$4,299 
(a)Actual energy purchases are significantly higher than these estimated minimum unconditional long-term firm commitments with remaining term in excess of one year. The year ending 2023 does not include an additional $1.5 billion of short-term commitments