XML 101 R41.htm IDEA: XBRL DOCUMENT v3.25.0.1
Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of the Components of the Company's Intangible Assets Subject to Amortization
The following tables summarize the components of intangible assets subject to amortization:
Year ended December 31, 2024PPAsLeasehold RightsEmission AllowancesOtherTotal
(In millions)
January 1, 2024$3,265 $86 $17 $15 $3,383 
Other— — — 4 4 
December 31, 20243,265 86 17 19 3,387 
Less accumulated amortization(1,140)(42)(5)(7)(1,194)
Net carrying amount$2,125 $44 $12 $12 $2,193 
Year ended December 31, 2023PPAsLeasehold RightsEmission AllowancesOtherTotal
(In millions)
January 1, 2023$3,321 $86 $17 $18 $3,442 
Walnut Creek PPA expiration(50)— — — (50)
Other(6)— — (3)(9)
December 31, 20233,265 86 17 15 3,383 
Less accumulated amortization(962)(38)(4)(5)(1,009)
Net carrying amount$2,303 $48 $13 $10 $2,374 
Schedule Future Amortization Expense for Intangibles The Company estimates the future amortization expense for its intangibles for the next five years as follows:
 (In millions)
2025$185 
2026185 
2027185 
2028185 
2029185