Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 4,100	$ 4,500	$ 8,000	$ 8,400
FPL [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,800	$ 3,100	5,300	$ 5,700
Unbilled revenues					$ 389
FPL [Member]
Disaggregation of Revenue [Line Items]
Unbilled revenues	507		507
NextEra Energy Resources [Member]
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 920		$ 920
Revenue Benchmark [Member] | FPL [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage			90.00%