Summary of Significant Accounting and Reporting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Regulatory Assets and Liabilities

NEE's and FPL's regulatory assets and liabilities are as follows:

	NEE				FPL
	December 31,				December 31,
	2017		2016		2017		2016
	(millions)
Regulatory assets:
Current:
Storm reserve deficiency	$	—	$	203	$	—	$	203
Other	336		321		335		321
Total	$	336	$	524	$	335	$	524
Noncurrent:
Acquisition of purchased power agreements	$	963	$	636	$	963	$	636
Other	1,506		1,258		1,286		937
Total	$	2,469	$	1,894	$	2,249	$	1,573
Regulatory liabilities:
Current:
Derivatives	$	—	$	208	$	—	$	208
Deferred clause revenues	296		86		296		86
Other	50		5		37		—
Total	$	346	$	299	$	333	$	294
Noncurrent:
Accrued asset removal costs	$	601	$	1,956	$	585	$	1,944
Asset retirement obligation regulatory expense difference	2,569		2,294		2,569		2,294
Deferred taxes	4,981		96		4,903		96
Other	614		560		585		559
Total	$	8,765	$	4,906	$	8,642	$	4,893

Schedule of Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets - NEE's goodwill and other intangible assets are as follows:

	Weighted- Average Useful Lives	December 31,
		2017			2016
	(years)	(millions)
Goodwill (by reporting unit):
NEER segment:
Gas infrastructure, primarily Texas pipelines		$	641		$	641
Customer supply		72			72
Generation assets		40			38
Other		11			28
Total goodwill		$	764		$	779
Other intangible assets not subject to amortization, primarily land easements		$	138		$	143
Other intangible assets subject to amortization:
Customer relationships associated with gas infrastructure	41	$	700		$	700
Purchased power agreements	22	521			444
Other, primarily transmission and development rights and customer lists	23	79			81
Total		1,300			1,225
Accumulated amortization		(151		)	(115		)
Total other intangible assets subject to amortization - net		$	1,149		$	1,110