XML 100 R65.htm IDEA: XBRL DOCUMENT v3.20.4
Asset Retirement Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Asset retirement obligation, roll forward analysis [Roll Forward]    
Beginning balance $ 3,506 $ 3,135
Liabilities incurred 138 100
Accretion expense 169 172
Liabilities settled (53) (65)
Revision in estimated cash flows - net (594) 32
Additions from acquisitions   132
Ending balance 3,166 3,506
Current portion 109 49
Restricted funds included in special use funds [Abstract]    
Restricted funds 7,703 6,880
FPL[Member]    
Asset retirement obligation, roll forward analysis [Roll Forward]    
Beginning balance 2,268 2,147
Liabilities incurred 0 1
Accretion expense 100 107
Liabilities settled (6) (1)
Revision in estimated cash flows - net (558) 14
Additions from acquisitions   0
Ending balance 1,804 2,268
Increase (decrease) in asset retirement obligation   $ (71)
License renewal period   20 years
Current portion 21 $ 0
Restricted funds included in special use funds [Abstract]    
Restricted funds $ 5,271 4,697
FPL[Member] | Jointly Owned Electricity Generation Plant 1 Member    
Asset retirement obligation, roll forward analysis [Roll Forward]    
Increase (decrease) in asset retirement obligation   $ 75