Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of interest and fee income from loans classified as other.

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NEP (Details) - USD ($) $ in Millions	3 Months Ended
NEP (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Investment [Line Items]
Investment in equity method investees	$ 6,735		$ 6,748
Deconsolidation, revaluation of retained investment, gain (loss), amount, before tax	3,900
Deconsolidation, revaluation of retained investment, gain (loss), amount, after tax	3,000
Guarantor obligations, current carrying value	761
Debt instrument, fair value disclosure	33
NextEra Energy Partners [Member]
Investment [Line Items]
Investment in equity method investees	4,400
Cash Sweep And Credit Support Agreement [Member] \| NEER [Member]
Investment [Line Items]
Fee income	24	$ 24
Due from related parties, current	46		45
Due from related parties, noncurrent	58		34
Cash Sweep And Credit Support Agreement [Member] \| NEER [Member] \| NextEra Energy Partners [Member]
Investment [Line Items]
Due to related parties	$ 42		$ 66