Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2016

Asset Retirement Obligations [Abstract]

Asset retirement obligation, roll forward analysis

A rollforward of NEE's and FPL's AROs is as follows:

	FPL				NEER				NEE
					(millions)
Balances, December 31, 2014	$	1,355			$	631			$	1,986
Liabilities incurred	5				46				51
Accretion expense	73				43				116
Liabilities settled	(20		)		(2		)		(22		)
Revision in estimated cash flows - net	409			(a)	(71		)	(b)	338
Balances, December 31, 2015	1,822				647				2,469
Liabilities incurred	1				56				57
Accretion expense	91				47				138
Liabilities settled	—				(2		)		(2		)
Revision in estimated cash flows - net	5				69			(c)	74
Balances, December 31, 2016	$	1,919			$	817			$	2,736

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(a) Primarily reflects the effect of revised cost estimates for decommissioning FPL's nuclear units consistent with the updated nuclear decommissioning studies approved by the FPSC.

(b) Primarily reflects the effect of revised cost estimates for decommissioning NEER’s nuclear units and a change in assumptions relating to spent fuel costs, partly offset by increased escalation rates.

(c) Primarily reflects the effect of revised cost estimates to dismantle certain of NEER’s wind and solar facilities.

Funds restricted for decommissioning included in special use funds

Restricted funds for the payment of future expenditures to decommission NEE's and FPL's nuclear units included in special use funds on NEE's and FPL's consolidated balance sheets are as follows (see Note 4 - Special Use Funds):

	FPL		NEER		NEE
			(millions)
Balances, December 31, 2016	$	3,665	$	1,769	$	5,434
Balances, December 31, 2015	$	3,430	$	1,634	$	5,064