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Derivative Instruments (Income Statement Disclosure) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) on disposal of businesses/assets – net $ 522 $ 77 $ 353
Not Designated as Hedging Instrument [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) related to derivatives not designated as hedging instruments (2,145) (2,545) (99)
Not Designated as Hedging Instrument [Member] | Commodity contracts | Gains (Losses) Included In Operating Revenues [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) related to derivatives not designated as hedging instruments (3,297) (2,710) 352
Unrealized Gain (Loss) on Derivatives (2,346) (2,235) (163)
Not Designated as Hedging Instrument [Member] | Foreign currency contracts | Gain (loss) included in interest expense [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) related to derivatives not designated as hedging instruments (61) (89) 8
Unrealized Gain (Loss) on Derivatives (53) (89) 26
Not Designated as Hedging Instrument [Member] | Interest rate contracts | Gain (loss) included in interest expense [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) related to derivatives not designated as hedging instruments 1,221 264 (421)
Unrealized Gain (Loss) on Derivatives 1,021 319 (396)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Not Designated as Hedging Instrument [Member] | Foreign currency contracts | Gain (loss) included in interest expense [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Interest Expense (3) (3) (3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Not Designated as Hedging Instrument [Member] | Interest rate contracts      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) on disposal of businesses/assets – net     23
Reclassification out of Accumulated Other Comprehensive Income [Member] | Not Designated as Hedging Instrument [Member] | Interest rate contracts | Gain (loss) included in interest expense [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Interest Expense (5) (7) (35)
FPL [Member]      
Gains (losses) related to derivatives not designated as hedging instruments [Abstract]      
Gains (losses) on commodity contracts, recorded as regulatory assets and or liabilities on the balance sheet due to regulatory treatment $ 211 $ 7 $ 6