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Derivative Instruments (Balance Sheet Disclosure) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Derivative Assets $ 3,520 $ 3,525
Derivative Liabilities 3,586 5,011
Derivative Asset, Current 1,730 1,590
Derivative Asset, Noncurrent 1,790 1,935
Derivative Liability, Current 845 2,102
Derivative Liability, Noncurrent 2,741 2,909
Current derivative assets    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Margin cash collateral received from counterparties 148 299
Non Current Derivative Assets Member    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Margin cash collateral received from counterparties 307 262
Current derivative liabilities    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Margin cash collateral paid to counterparties 815 328
Noncurrent derivative liabilities    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Margin cash collateral paid to counterparties   1,213
Commodity contracts | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Derivative assets, Netting (6,171) (12,030)
Derivative liability, Netting 6,531 13,010
Derivative Assets 3,135 2,995
Derivative Liabilities 2,903 4,743
Commodity contracts | Level 1 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 2,640 5,372
Total derivative liabilities 3,796 7,185
Commodity contracts | Level 2 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 4,741 7,559
Total derivative liabilities 4,664 7,620
Commodity contracts | Level 3 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 1,925 2,094
Total derivative liabilities 974 2,948
Interest rate contracts | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Derivative assets, Netting 81 (49)
Derivative liability, Netting 81 49
Derivative Assets 385 534
Derivative Liabilities 634 142
Interest rate contracts | Level 1 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 0 0
Total derivative liabilities 0 0
Interest rate contracts | Level 2 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 304 583
Total derivative liabilities 553 191
Interest rate contracts | Level 3 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 0 0
Total derivative liabilities 0 0
Foreign currency contracts | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Derivative assets, Netting 0 (4)
Derivative liability, Netting 0 4
Derivative Assets 0 (4)
Derivative Liabilities 49 126
Foreign currency contracts | Level 1 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 0 0
Total derivative liabilities 0 0
Foreign currency contracts | Level 2 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 0 0
Total derivative liabilities 49 130
Foreign currency contracts | Level 3 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 0 0
Total derivative liabilities 0 0
FPL [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Derivative Assets 27 29
Derivative Liabilities 15 13
Derivative Asset, Current 13 19
Derivative Asset, Noncurrent 14 10
Derivative Liability, Current 9 12
Derivative Liability, Noncurrent $ 6 $ 1
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Other
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Other Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Other
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Other
FPL [Member] | Commodity contracts | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Derivative assets, Netting $ (3) $ (7)
Derivative liability, Netting 3 7
Derivative Assets 27 29
Derivative Liabilities 15 13
FPL [Member] | Commodity contracts | Level 1 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 0 0
Total derivative liabilities 0 0
FPL [Member] | Commodity contracts | Level 2 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 1 11
Total derivative liabilities 13 4
FPL [Member] | Commodity contracts | Level 3 | Fair Value, Recurring [Member]    
Derivative Instruments and Hedging Activities Disclosures [Abstract]    
Total derivative assets 29 25
Total derivative liabilities $ 5 $ 16