Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

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 each of the Duke Energy Registrants, net of tax, for stock-based compensation.

	Years Ended December 31,
(in millions)	2014		2013		2012
Duke Energy	$	38	$	52	$	48
Duke Energy Carolinas	12		13		12
Progress Energy	14		23		25
Duke Energy Progress	9		14		16
Duke Energy Florida	5		9		9
Duke Energy Ohio	5		4		4
Duke Energy Indiana	3		4		4

Schedule Of Stock-Based Compensation Expense

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)	2014		2013		2012
Restricted stock unit awards	$	39	$	49	$	43
Performance awards	22		34		33
Stock options	—		2		2
Pretax stock-based compensation cost	$	61	$	85	$	78
Tax benefit associated with stock-based compensation expense	$	23	$	33	$	30
Stock-based compensation costs capitalized	4		3		2

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes information about stock options outstanding.

	Options (in thousands)		Weighted-Average Exercise Price (per share)		Weighted-Average Remaining Life	Aggregate Intrinsic Value (in millions)
Outstanding at December 31, 2013	793		$	61
Exercised	(420	)	59
Outstanding at December 31, 2014	373		64		6 years, 10 months	$	7
Exercisable at December 31, 2014	53		46		1 year	2
Options expected to vest	320		67		7 years, 10 months	5

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,
	2014		2013		2012
Intrinsic value of options exercised (in millions)	$	6	$	26	$	17
Tax benefit related to options exercised (in millions)	2		10		7
Cash received from options exercised (in millions)	25		9		21
Stock options granted (in thousands)	—		310		340

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

Restricted stock unit awards issued and outstanding generally vest over periods from immediate to 3 years. Fair value amounts are based on the market price of Duke Energy's common stock at the grant date. The following table includes information related to restricted stock unit awards.

	Years Ended December 31,
	2014		2013		2012
Shares awarded (in thousands)	557		612		443
Fair value (in millions)	$	40	$	42	$	28

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

	Shares (in thousands)		Weighted-Average Grant Date Fair Value (Per Share)
Outstanding at December 31, 2013	1,400		$	66
Granted	557		71
Vested	(832	)	62
Forfeited	(45	)	68
Outstanding at December 31, 2014	1,080		69
Restricted stock unit awards expected to vest	1,057		69

Schedule of Performance Awards

The following table includes information related to performance awards.

	Years Ended December 31,
	2014		2013		2012
Shares awarded (in thousands)	542		633		352
Fair value (in millions)	$	19	$	28	$	19

Schedule of Nonvested Performance-based Units Activity

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

	Shares (in thousands)		Weighted-Average Grant Date Fair Value (per share)
Outstanding at December 31, 2013	1,822		$	46
Granted	542		34
Vested	(524	)	52
Forfeited	(213	)	37
Outstanding at December 31, 2014	1,627		42
Stock-based performance awards expected to vest	1,418		42