Severance (Tables)

12 Months Ended

Dec. 31, 2020

Restructuring and Related Activities [Abstract]

Schedule of Severance Expense

The following table presents the direct and allocated severance and related charges accrued for approximately 30 employees in 2020, 140 employees in 2019, and 1,900 employees in 2018, by the Duke Energy Registrants within Operation, maintenance and other on the Consolidated Statements of Operations.

			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Year Ended December 31, 2020(a)(b)	$	(85)	$	(58)	$	(28)	$	(31)	$	3	$	—	$	—	$	—
Year Ended December 31, 2019	16		8		6		3		3		—		1		1
Year Ended December 31, 2018	187		102		69		52		17		6		7		2

(a)    Includes unamortized deferred severance charges of approximately $(86) million, $(57) million, $(29) million and $(29) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.

(b)    Includes adjustments associated with 2018 severance charges of approximately $(6) million, $(2) million, $(3) million and $(2) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.

Schedule of Severance Liability

The table below presents the severance liability for past and ongoing severance plans including the plans described above.

			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Balance at December 31, 2019	$	41	$	11	$	13	$	6	$	7	$	1	$	2	$	—
Provision/Adjustments	1		—		—		(2)		2		(1)		—		—
Cash Reductions	(31)		(9)		(10)		(3)		(7)		—		(1)		—
Balance at December 31, 2020	$	11	$	2	$	3	$	1	$	2	$	—	$	1	$	—