Derivative Instruments (Net Notional Volumes and Additional Disclosures) (Details) bbl in Millions, MWh in Millions, MMBTU in Millions, $ in Billions	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($) MWh MMBTU bbl	Dec. 31, 2021 USD ($) MWh MMBTU bbl	Oct. 31, 2022 USD ($)
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	$ 8.8	$ 11.2
Interest Rate Swap [Member] | Forecast
Derivative [Line Items]
Notional amount			$ 10.0
Foreign currency contracts
Derivative [Line Items]
Notional amount	$ 1.0	$ 1.0
Short [Member] | Commodity contract - Power [Member]
Derivative [Line Items]
Non-monetary net notional amount (in MWh) | MWh	(660)	(103)
Short [Member] | Commodity contract - Natural gas [Member]
Derivative [Line Items]
Non-monetary net notional amount (in MMBtu) | MMBTU	1,467	1,290
Short [Member] | Commodity contract - Oil [Member]
Derivative [Line Items]
Non-monetary net notional amount (in barrels) | bbl	(38)	(33)
Florida Power & Light Company | Short [Member] | Commodity contract - Power [Member]
Derivative [Line Items]
Non-monetary net notional amount (in MWh) | MWh	0	0
Florida Power & Light Company | Short [Member] | Commodity contract - Oil [Member]
Derivative [Line Items]
Non-monetary net notional amount (in barrels) | bbl	0	0
Florida Power & Light Company | Long [Member] | Commodity contract - Natural gas [Member]
Derivative [Line Items]
Non-monetary net notional amount (in MMBtu) | MMBTU	151	91