Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation by Form of Award

The Company’s stock-based compensation by form of award, including stock-based compensation recorded in discontinued operations as a result of the spin-off of Engility, is presented in the table below.


	Year Ended December 31,
	2013			2012			2011
	(in millions)
Stock options	$	10		$	10		$	11
Restricted stock units		41			46			48
Performance units		7			8			5

Total before income taxes		58			64			64
Income taxes		(22	)		(24	)		(24	)

Total after income taxes		36			40			40
Less: Stock based compensation recorded in discontinued operations, net of income taxes		—			1			4

Stock based compensation recorded in continuing operations, net of income taxes	$	36		$	39		$	36

Company's Stock Option Activity and Changes

The table below presents a summary of the Company’s stock option activity as of December 31, 2013 and changes during the year then ended.


	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
	(in thousands)					(in years)		(in millions)
Number of shares under option:
Outstanding at January 1, 2013		4,989.9		$	76.57		5.8	$	23

Options granted		741.7			77.00
Options exercised		(1,770.4	)		73.24
Options forfeited		(78.3	)		89.93

Outstanding at December 31, 2013		3,882.9		$	77.90		6.2	$	112

Vested and expected to vest at December 31, 2013⁽¹⁾		3,865.9		$	77.91		6.2	$	112

Exercisable at December 31, 2013		2,420.9		$	80.44		4.9	$	64

⁽¹⁾	Represents outstanding options reduced by expected forfeitures for options not fully vested.

Weighted Average Assumptions in Valuation Model

The weighted average assumptions used in the valuation model are presented in the table below.


	2013 Grants			2012 Grants			2011 Grants
Expected holding period (in years)		5.6			5.4			5.2
Expected volatility		26.4	%		27.0	%		26.4	%
Expected dividend yield		3.6	%		3.6	%		2.8	%
Risk-free interest rate		1.0	%		1.0	%		2.2	%


	2011 Grants
Expected volatility		10.2	%
Expected dividend yield		2.2	%
Risk-free interest rate		0.02	%

Company's Nonvested Restricted Stock Unit Awards and Changes

The table below presents a summary of the Company’s nonvested restricted stock unit awards as of December 31, 2013 and changes during the year then ended.


	Number of Shares			Weighted Average Grant Date Fair Value
	(in thousands)
Nonvested balance at January 1, 2013		1,729.7		$	75.64
Granted		606.4			77.12
Vested		(476.4	)		85.81
Forfeited		(85.9	)		73.60

Nonvested balance at December 31, 2013		1,773.8		$	73.51

Company's Performance Unit Awards Based on Expected Performance

The table below presents a summary of the Company’s performance unit awards based on expected performance as of December 31, 2013 and changes during the year then ended.


	Payable in Cash (TSR)					Payable in Shares (EPS)
	Number of Units			Weighted Average Grant Date Fair Value		Number of Units			Weighted Average Grant Date Fair Value
	(in thousands)					(in thousands)
Outstanding at January 1, 2013		59.3		$	106.20		125.6		$	71.86
Granted		—			—		61.7			77.00
(Decrease) increase due to expected performance		(33.1	)		106.20		59.9			69.04
Vested		(25.3	)		106.20		(67.9	)		76.82
Forfeited		(0.9	)		106.20		(3.8	)		69.56

Outstanding at December 31, 2013		—		$	—		175.5		$	70.84