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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations

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

 

 

December 31,

 

(millions)

 

2022

 

 

2021

 

Beginning balance

 

$

31

 

 

$

39

 

Additional liabilities

 

 

1

 

 

 

0

 

Liabilities settled (1)

 

 

0

 

 

 

(9

)

Other

 

 

3

 

 

 

1

 

Ending balance

 

$

35

 

 

$

31

 

 

(1)
Tampa Electric produces ash and other by-products, collectively known as CCRs, at its Big Bend and Polk power stations. The decrease in the ARO in 2021 is due to the closure of CCR management facilities.