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NEP (Details) - USD ($) $ in Millions	3 Months Ended
NEP (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Investments [Line Items]
Guarantor obligations, current carrying value	$ 484
Debt instrument, fair value disclosure	43
NextEra Energy Partners [Member]
Schedule of Investments [Line Items]
Guarantor obligations, current carrying value	3,382
Cash Sweep And Credit Support Agreement [Member] \| NEER [Member]
Schedule of Investments [Line Items]
Fee income	41	$ 33
Due from related parties, current	78		$ 113
Due from related parties, noncurrent	39		40
Cash Sweep And Credit Support Agreement [Member] \| NEER [Member] \| NextEra Energy Partners [Member]
Schedule of Investments [Line Items]
Due to related parties	$ 135		$ 57