Derivative Instruments (Balance Sheet Disclosure) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative Assets	$ 1,824	$ 2,217
Derivative Liabilities	2,976	1,510
Derivative Asset, Current	689	570
Derivative Asset, Noncurrent	1,135	1,647
Derivative Liability, Current	1,263	311
Derivative Liability, Noncurrent	1,713	1,199
Current derivative assets
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Margin cash collateral received from counterparties	150
Non Current Derivative Assets Member
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Margin cash collateral received from counterparties	56	184
Current derivative liabilities
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Margin cash collateral paid to counterparties	6	136
Noncurrent derivative liabilities
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Margin cash collateral paid to counterparties	172
Commodity contracts \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative assets, Netting	(6,622)	(2,325)
Derivative liability, Netting	(6,594)	(2,277)
Derivative Assets	1,757	2,154
Derivative Liabilities	2,198	500
Commodity contracts \| Level 1 \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Total derivative assets	1,896	919
Total derivative liabilities	2,571	1,004
Commodity contracts \| Level 2 \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Total derivative assets	5,082	1,881
Total derivative liabilities	4,990	1,468
Commodity contracts \| Level 3 \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Total derivative assets	1,401	1,679
Total derivative liabilities	1,231	305
Interest rate contracts \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative assets, Netting	(30)	(41)
Derivative liability, Netting	(30)	(41)
Derivative Assets	76	40
Derivative Liabilities	709	1,001
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	106	81
Total derivative liabilities	739	1,042
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	(17)	(34)
Derivative liability, Netting	(17)	(34)
Derivative Assets	(9)	23
Derivative Liabilities	69	9
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	8	57
Total derivative liabilities	86	43
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 Liabilities	10	3
FPL [Member] \| Current other assets
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative Asset, Current	13	3
FPL [Member] \| Current other liabilities
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative Liability, Current	9	2
FPL [Member] \| Noncurrent other liabilities
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative Liability, Noncurrent	1	1
FPL [Member] \| Commodity contracts \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Derivative assets, Netting	(3)	0
Derivative liability, Netting	(3)	0
Derivative Assets	13	3
Derivative Liabilities	10	3
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	3	1
Total derivative liabilities	8	0
FPL [Member] \| Commodity contracts \| Level 3 \| Fair Value, Recurring [Member]
Derivative Instruments and Hedging Activities Disclosures [Abstract]
Total derivative assets	13	2
Total derivative liabilities	$ 5	$ 3

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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