XML 47 R40.htm IDEA: XBRL DOCUMENT v3.25.0.1
Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations

Reconciliation of beginning and ending carrying amount of asset retirement obligations:

 

 

December 31,

 

(millions)

 

2024

 

 

2023

 

Beginning balance

 

$

32

 

 

$

35

 

Additional liabilities

 

 

8

 

 

 

1

 

Liabilities settled

 

 

0

 

 

 

(4

)

Ending balance

 

$

40

 

 

$

32