Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Accrual Adjustments

	2013		2012		2011
	Millions
Compensation Cost included in Operation and Maintenance Expense	$	32	$	25	$	23
Income Tax Benefit Recognized in Consolidated Statement of Operations	$	13	$	10	$	10

Stock Options Activity

Changes in stock options for 2013 are summarized as follows:

	Options	Weighted Average Exercise Price		Weighted Average Remaining Years Contractual Term	Aggregate Intrinsic Value
Outstanding as of January 1, 2013	2,945,400	$	34.19
Exercised	229,700	$	28.30
Canceled/Forfeited	100,534	$	41.44
Outstanding as of December 31, 2013	2,615,166	$	34.43	4.7	$	2,311,503
Exercisable at December 31, 2013	2,615,166	$	34.43	4.7	$	2,311,503

Activity For Options Exercised

Activity for options exercised for the years ended December 31, 2013, 2012 and 2011 is shown below:

	2013		2012		2011
	Millions
Total Intrinsic Value of Options Exercised	$	1	$	4	$	2
Cash Received from Options Exercised	$	7	$	7	$	6
Tax Benefit Realized from Options Exercised	$	—	$	1	$	1

Restricted Stock Activity

Changes in restricted stock for the year ended December 31, 2013 are summarized as follows:

	Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Years Contractual Term	Aggregate Intrinsic Value
Non-vested as of January 1, 2013	68,800	$	32.57
Vested	60,000	$	32.93
Non-vested as of December 31, 2013	8,800	$	30.18	0.3	$	281,952

Restricted Stock Units Activity

Changes in restricted stock units for the year ended December 31, 2013 are summarized as follows:

	Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Years Contractual Term	Aggregate Intrinsic Value
Non-vested as of January 1, 2013	834,527	$	31.12
Granted	325,035	$	31.41
Vested	109,691	$	30.25
Canceled/Forfeited	2,302	$	31.49
Non-vested as of December 31, 2013	1,047,569	$	31.30	1.1	$	33,564,117

Performance Units Information

Changes in Performance Share Units for the year ended December 31, 2013 are summarized as follows:

	Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Years Contractual Term	Aggregate Intrinsic Value
Non-vested as of January 1, 2013	749,993	$	32.70
Granted	420,385	$	35.07
Vested	270,140	$	34.26
Canceled/Forfeited	98,120	$	34.10
Non-vested as of December 31, 2013	802,118	$	33.25	1.5	$	25,699,861