Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2011

Stock Compensation Plans

Stock-based compensation expense recognized in continuing operations

Years ended December 31	2011		2010		2009
Restricted Stock Units ("RSUs")	$	142	$	138	$	124
Performance Share Awards ("PSAs")		78		62		60
Stock options		9		17		21
Employee stock purchase plans		6		4		4
Total stock-based compensation expense		235		221		209
Tax benefit		77		75		68
Stock-based compensation expense, net of tax	$	158	$	146	$	141

Non-vested stock awards

	2011					2010					2009
Years ended December 31	Shares			Fair Value (1)		Shares			Fair Value (1)		Shares			Fair Value (1)
Non-vested at beginning of year		10,674		$	38		12,850		$	36		14,060		$	35
Granted		3,506			51		3,817			40		3,786			38
Vested		(3,773	)		39		(5,278	)		35		(4,330	)		33
Forfeited		(491	)		39		(715	)		35		(666	)		37
Non-vested at end of year		9,916			42		10,674			38		12,850			36

(1)

Represents per share weighted average fair value of award at date of grant.

Performance-based plans

	2011		2010		2009
Target PSUs granted		1,715		1,390		3,754
Fair Value (1)	$	50	$	39	$	38
Number of shares that would be issued based on current performance levels		1,772		1,397		2,300
Unamortized expense, based on current performance levels	$	60	$	18	$	4

(1)

Represents per share weighted average fair value of award at date of grant.

Weighted average assumptions, average expected life and estimated fair value of employee stock options

Years ended December 31	2011			2010			2009
	All Other Options			All Other Options			LPP Options			SSP Options			All Other Options
Weighted average volatility		26.1	%		28.5	%		35.5	%		34.1	%		32.0	%
Expected dividend yield		1.3	%		1.6	%		1.3	%		1.5	%		1.5	%
Risk-free rate		2.2	%		3.0	%		1.5	%		2.0	%		2.6	%
Weighted average expected life, in years		5.5			6.1			4.4			5.6			6.5
Weighted average estimated fair value per share	$	10.92		$	10.37		$	12.19		$	11.82		$	12.34

Stock options and related information

Years ended December 31	2011					2010					2009
	Shares			Weighted- Average Exercise Price Per Share		Shares			Weighted- Average Exercise Price Per Share		Shares			Weighted- Average Exercise Price Per Share
Beginning outstanding		13,919		$	32		15,937		$	33		19,666		$	31
Options issued in connection with the Hewitt acquisition		—			—		4,545			22		—			—
Granted		80			53		143			38		1,551			38
Exercised		(4,546	)		32		(6,197	)		27		(4,475	)		27
Forfeited and expired		(337	)		36		(509	)		35		(805	)		38
Outstanding at end of year		9,116			32		13,919			32		15,937			33
Exercisable at end of year		7,833			30		11,293			30		9,884			31
Shares available for grant		24,508					22,777					8,257

Summary of options outstanding and exercisable

A summary of options outstanding and exercisable as of December 31, 2011 is as follows (shares in thousands):

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Shares Outstanding		Weighted- Average Remaining Contractual Life (years)		Weighted- Average Exercise Price Per Share		Shares Exercisable		Weighted- Average Remaining Contractual Life (years)		Weighted- Average Exercise Price Per Share
$14.71 – 22.86		2,718		2.66	$	20.95		2,718		2.66	$	20.95
22.87 – 25.51		663		3.40		25.37		663		3.40		25.37
25.52 – 32.53		1,069		2.95		27.53		1,069		2.95		27.53
32.54 – 36.88		1,277		2.96		36.05		1,037		2.41		35.96
36.89 – 43.44		2,309		3.04		39.72		1,757		2.35		39.92
43.45 – 52.93		1,080		4.49		46.24		589		4.09		45.52
		9,116						7,833

Other information related to the company's stock options

	2011		2010		2009
Aggregate intrinsic value of stock options exercised	$	80	$	87	$	62
Cash received from the exercise of stock options		153		162		121
Tax benefit realized from the exercise of stock options		14		4		15