Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

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)	2016		2015		2014
Duke Energy	$	35	$	38	$	38
Duke Energy Carolinas	12		14		12
Progress Energy	12		14		14
Duke Energy Progress	7		9		9
Duke Energy Florida	5		5		5
Duke Energy Ohio	2		2		5
Duke Energy Indiana	3		4		3

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)	2016		2015		2014
Restricted stock unit awards	$	36	$	38	$	39
Performance awards	19		23		22
Pretax stock-based compensation cost	$	55	$	61	$	61
Tax benefit associated with stock-based compensation expense	$	20	$	23	$	23
Stock-based compensation costs capitalized	2		3		4

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

The following table includes information related to restricted stock unit awards.

	Years Ended December 31,
	2016		2015		2014
Shares awarded (in thousands)	684		524		557
Fair value (in millions)	$	52	$	41	$	40

The following table summarizes information about restricted stock unit awards outstanding.

			Weighted Average
	Shares		Grant Date Fair Value
	(in thousands)		(per share)
Outstanding at December 31, 2015	953		$	75
Piedmont transfers in	113		79
Granted	684		75
Vested	(525	)	73
Forfeited	(86	)	76
Outstanding at December 31, 2016	1,139		76
Restricted stock unit awards expected to vest	1,056		76

Schedule of Performance Awards

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

	Years Ended December 31,
	2016		2015		2014
Shares awarded (in thousands)	675		642		542
Fair value (in millions)	$	25	$	26	$	19

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes information about stock options outstanding.

			Weighted Average
	Stock Options		Exercise Price
	(in thousands)		(per share)
Outstanding at December 31, 2015	103		$	69
Exercised	(103	)	69
Outstanding at December 31, 2016	—		—

Schedule of Nonvested Performance-based Units Activity

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

			Weighted Average
	Shares		Grant Date Fair Value
	(in thousands)		(per share)
Outstanding at December 31, 2015	1,697		$	40
Granted	675		38
Vested	(544	)	46
Forfeited	(104	)	38
Outstanding at December 31, 2016	1,724		38
Stock-based performance awards expected to vest	1,199		38

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Exercises

The following table summarizes additional information related to stock options exercised and granted.

	Years Ended December 31,
(in millions)	2016		2015		2014
Intrinsic value of options exercised	$	1	$	5	$	6
Tax benefit related to options exercised	—		2		2
Cash received from options exercised	7		17		25