Derivative Instruments (Net Notional Volumes and Additional Disclosures) (Details) bbl in Millions, MWh in Millions, MMBTU in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2023 USD ($) MWh MMBTU bbl	Dec. 31, 2022 USD ($) MWh MMBTU bbl	Jan. 31, 2024 USD ($)
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ (25.6)	$ (19.7)
Interest Rate Swap [Member] | Subsequent Event
Derivative [Line Items]
Derivative, Notional Amount			$ (4.0)
Foreign currency contracts
Derivative [Line Items]
Derivative, Notional Amount	$ (0.5)	$ (1.0)
Short [Member] | Commodity contract - Power [Member]
Schedule of net notional volume of commodity derivative instruments [Abstract]
Derivative, Nonmonetary Notional Amount | MWh	167	104
Short [Member] | Commodity contract - Natural gas [Member]
Schedule of net notional volume of commodity derivative instruments [Abstract]
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	1,452	1,307
Short [Member] | Commodity contract - Oil [Member]
Schedule of net notional volume of commodity derivative instruments [Abstract]
Derivative, Nonmonetary Notional Amount, Volume | bbl	42	38
Short [Member] | FPL [Member] | Commodity contract - Oil [Member]
Schedule of net notional volume of commodity derivative instruments [Abstract]
Derivative, Nonmonetary Notional Amount, Volume | bbl	0	0
Long [Member] | FPL [Member] | Commodity contract - Power [Member]
Schedule of net notional volume of commodity derivative instruments [Abstract]
Derivative, Nonmonetary Notional Amount | MWh	0	0
Long [Member] | FPL [Member] | Commodity contract - Natural gas [Member]
Schedule of net notional volume of commodity derivative instruments [Abstract]
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	717	258