Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Total Stock-Based Compensation Expense, net of tax

The following table summarizes the total expense recognized by the Duke Energy Registrants, net of tax, for stock-based compensation.

	Years Ended December 31,
(in millions)	2018		2017		2016
Duke Energy	$	56	$	43	$	35
Duke Energy Carolinas	20		15		12
Progress Energy	21		16		12
Duke Energy Progress	13		10		7
Duke Energy Florida	8		6		5
Duke Energy Ohio	4		3		2
Duke Energy Indiana	5		4		3
Piedmont(a)	3		3

(a) Piedmont's stock-based compensation costs were not material for the two months ended December 31, 2016. See discussion below for information on Piedmont's pre-merger stock-based compensation plans.

Schedule Of Stock-Based Compensation Expense

Duke Energy's pretax stock-based compensation costs, the tax benefit associated with stock-based compensation expense and stock-based compensation costs capitalized are included in the following table.

	Years Ended December 31,
(in millions)	2018		2017		2016
Restricted stock unit awards	$	43	$	41	$	36
Performance awards	35		27		19
Pretax stock-based compensation cost	$	78	$	68	$	55
Stock-based compensation costs capitalized	5		4		2
Stock-based compensation expense	$	73	$	64	$	53
Tax benefit associated with stock-based compensation expense	$	17	$	25	$	20

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

The following table includes information related to RSU awards.

	Years Ended December 31,
	2018		2017		2016
Shares awarded (in thousands)	649		583		684
Fair value (in millions)	$	49	$	47	$	52

The following table summarizes information about RSU awards outstanding.

			Weighted Average
	Shares		Grant Date Fair Value
	(in thousands)		(per share)
Outstanding at December 31, 2017	1,121		$	78
Granted	649		76
Vested	(545	)	78
Forfeited	(72	)	77
Outstanding at December 31, 2018	1,153		77
Restricted stock unit awards expected to vest	1,101		77

Schedule of Performance Awards

The following table includes information related to stock-based performance awards.

	Years Ended December 31,
	2018		2017		2016
Shares granted assuming target performance (in thousands)	372		461		338
Fair value (in millions)	$	27	$	37	$	25

Schedule of Nonvested Performance-based Units Activity

The following table summarizes information about stock-based performance awards outstanding and assumes payout at the target level.

			Weighted Average
	Shares		Grant Date Fair Value
	(in thousands)		(per share)
Outstanding at December 31, 2017	1,065		$	79
Granted	372		73
Vested	(155	)	81
Forfeited	(165	)	80
Outstanding at December 31, 2018	1,117		77
Stock-based performance awards expected to vest	1,086		77

Piedmont Natural Gas [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock-Based Compensation Expense

Piedmont's stock-based compensation costs and the tax benefit associated with stock-based compensation expense are included in the following table.

(in millions)	Year Ended October 31, 2016
Pretax stock-based compensation cost	$	16
Tax benefit associated with stock-based compensation expense	6
Net of tax stock-based compensation cost	$	10