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Asset Impairment Expense (Tables)
9 Months Ended
Sep. 30, 2021
Impairment or Disposal of Tangible Assets Disclosure [Abstract]  
Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block]
The following table presents our asset impairment expense for the periods indicated (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Ventanas 3 & 4$— $— $649 $— 
Puerto Rico— — 475 — 
Angamos— 564 155 564 
Mountain View I & II— — 67 — 
Estrella del Mar I11 30 11 30 
Ventanas 1 & 2— 213 — 213 
Hawaii— 38 — 38 
Other18 17 10 
Total$29 $849 $1,374 $855