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Asset Impairment Expense (Tables)
12 Months Ended
Dec. 31, 2021
Impairment or Disposal of Tangible Assets Disclosure [Abstract]  
Details of Impairment of Long-Lived Assets Held and Used by Asset
Year ended December 31, (in millions)202120202019
Ventanas 3 & 4$649 $— $— 
Puerto Rico475 — — 
Angamos155 564 — 
Buffalo Gap III91 — — 
Buffalo Gap II73 — — 
Mountain View I & II67 — — 
Buffalo Gap I29 — — 
Estrella del Mar I11 30 — 
Ventanas 1 & 2— 213 — 
Hawaii— 38 60 
Kilroot and Ballylumford— — 115 
Other25 19 10 
Total$1,575 $864 $185