Employee Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Net periodic benefit (income) cost

The components of net periodic income for the plans are as follows:

	Pension Benefits				Postretirement Benefits				Pension Benefits				Postretirement Benefits
	Three Months Ended September 30,				Three Months Ended September 30,				Nine Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
	(millions)
Service cost	$	23	$	22	$	1	$	—	$	68	$	64	$	1	$	1
Interest cost	16		23		1		3		48		69		3		6
Expected return on plan assets	(85)		(80)		—		—		(255)		(241)		—		—
Amortization of actuarial loss	6		4		1		—		18		13		4		2
Amortization of prior service benefit	—		(1)		(4)		(4)		(1)		(1)		(11)		(12)
Special termination benefits(a)	—		4		—		—		—		13		—		—
Net periodic income at NEE	$	(40)	$	(28)	$	(1)	$	(1)	$	(122)	$	(83)	$	(3)	$	(3)
Net periodic income allocated to FPL	$	(27)	$	(21)	$	(1)	$	(1)	$	(81)	$	(63)	$	(3)	$	(3)

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(a) Reflects enhanced early retirement benefit.