Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

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

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

	Years Ended December 31,
(in millions)	2013		2012		2011
Duke Energy	$	52	$	48	$	32
Duke Energy Carolinas		13		12		17
Progress Energy		23		25		20
Duke Energy Progress		14		16		12
Duke Energy Florida		9		9		8
Duke Energy Ohio		4		4		6
Duke Energy Indiana		4		4		4

Schedule Of Stock-Based Compensation Expense

	Years Ended December 31,
(in millions)	2013		2012		2011
Stock options	$	2	$	2	$	2
Restricted stock unit awards		49		43		27
Performance awards		34		33		23
Pretax stock-based compensation cost	$	85	$	78	$	52
Tax benefit associated with stock-based compensation expense	$	33	$	30	$	20
Stock-based compensation costs capitalized		3		2		2

Schedule of Share-based Compensation, Stock Options, Activity

STOCK OPTIONS
The following table summarizes information about stock options outstanding.
	Options (in thousands)		Weighted-Average Exercise Price		Weighted-Average Remaining Life		Aggregate Intrinsic Value (in millions)
Outstanding at December 31, 2012		1,654	$	51
Granted		310		69
Exercised		(1,162)		48
Forfeited or expired		(9)		41
Outstanding at December 31, 2013		793		61		7y, 3m	$	6
Exercisable at December 31, 2013		137		46		1y, 5m		3
Options expected to vest		656		64		8y, 5m		3

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

	Years Ended December 31,
(in millions)	2013		2012		2011
Intrinsic value of options exercised	$	26	$	17	$	26
Tax benefit related to options exercised		10		7		10
Cash received from options exercised		9		21		74
Stock options granted (in thousands)		310		340		358

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following assumptions were used to determine the grant date fair value of stock options granted in 2013.
Risk-free interest rate(a)		1.0	%
Expected dividend yield(b)		4.7	%
Expected life(c)		6 years
Expected volatility(d)		18.1	%
(a)	The risk-free rate is based upon the average of five-year and seven-year U.S. Treasury Constant Maturity rates as of the grant date.
(b)	The expected dividend yield is based upon the most recent annualized dividend and the one-year average closing stock price.
(c)	The expected life of options is derived from the simplified method approach.
(d)	Volatility is based equally between historical and implied volatility. Historic volatility is based on Duke Energy's historical volatility over the expected life using daily stock prices. Implied volatility is the average for all option contracts with a term greater than six months using the strike price closest to the stock price on the valuation date.

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

		Years Ended December 31,
		2013		2012		2011
Shares awarded (in thousands)			612		443		636
Fair value (in millions)(a)		$	42	$	28	$	34
(a)	Based on the market price of Duke Energy's common stock at the grant date.

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

The following table summarizes information about restricted stock unit awards outstanding.
	Shares (in thousands)		Weighted-Average Per Share Grant Date Fair Value
Outstanding at December 31, 2012		1,607	$	64
Granted		612		69
Vested		(794)		63
Forfeited		(25)		68
Outstanding at December 31, 2013		1,400		66
Restricted stock unit awards expected to vest		1,365		66

Schedule of Performance Awards

	Years Ended December 31,
	2013		2012		2011
Shares awarded (in thousands)		633		352		432
Fair value (in millions)	$	28	$	19	$	20

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 Per Share Grant Date Fair Value
Outstanding at December 31, 2012		2,346	$	47
Granted		633		45
Vested		(858)		49
Forfeited		(299)		46
Outstanding at December 31, 2013		1,822		46
Stock-based performance awards expected to vest		1,646		47