Other Income and Expenses, Net (Tables)

12 Months Ended

Dec. 31, 2017

Component Of Other Income Expense Nonoperating [Line Items]

Schedule of Other Income and Expenses, Net

The components of Other income and expenses, net on the Consolidated Statements of Operations are as follows. Amounts for Piedmont were not material.

	Year Ended December 31, 2017
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Interest income	$	13	$	2	$	6	$	2	$	5	$	6	$	8
AFUDC equity	237		106		92		47		45		11		28
Post in-service equity returns	40		28		12		12		—		—		—
Nonoperating income, other	62		3		18		4		11		—		1
Other income and expense, net	$	352	$	139	$	128	$	65	$	61	$	17	$	37

	Year Ended December 31, 2016
			Duke				Duke		Duke		Duke			Duke
	Duke		Energy		Progress		Energy		Energy		Energy			Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio			Indiana
Interest income	$	21	$	4	$	4	$	3	$	2	$	5		$	6
AFUDC equity	200		102		76		50		26		6			16
Post in-service equity returns	67		55		12		12		—		—			—
Nonoperating income (expense), other	36		1		22		6		16		(2		)	—
Other income and expense, net	$	324	$	162	$	114	$	71	$	44	$	9		$	22

	Year Ended December 31, 2015
			Duke				Duke		Duke		Duke			Duke
	Duke		Energy		Progress		Energy		Energy		Energy			Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio			Indiana
Interest income	$	20	$	2	$	4	$	2	$	2	$	4		$	6
AFUDC equity	164		96		54		47		7		3			11
Post in-service equity returns	73		60		13		13		—		—			—
Nonoperating income (expense), other	33		2		26		9		15		(1		)	(6		)
Other income and expense, net	$	290	$	160	$	97	$	71	$	24	$	6		$	11