Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

The following table summarizes stock option activity during 2012:

Number of
Stock

Options

(In thousands)

Weighted
Average
Exercise

Price

Weighted
Average
Remaining
Contractual
Life

(In years)

Aggregate
Intrinsic
Value

(In millions)

Outstanding at December 31, 2011

24,559

78.45

Granted

3,401

82.01

Exercised

(6,743

)

65.22

Forfeited/expired

(592

)

85.85

Outstanding at December 31, 2012

20,625

83.15

5.7

248.9

Vested and expected-to-vest at December 31, 2012

20,517

83.16

5.7

247.8

Vested at December 31, 2012

14,873

84.35

4.7

178.4

Stock Options

The following table pertains to stock options that were granted, vested, and exercised in 2012, 2011, and 2010 (in millions, except for weighted average grant-date fair value of stock options granted):


	2012			2011			2010
Weighted average grant-date fair value of stock options granted		$	10.57		$	13.06		$	14.05
Grant-date fair value of all stock options that vested			47			60			71
Intrinsic value of all stock options exercised			162			60			50

Stock-Based Compensation Black Scholes Option Pricing

We used the following weighted average assumptions in the Black-Scholes option pricing model to determine the fair values of stock-based compensation awards during 2012, 2011, and 2010:

2012

2011

2010

Risk-free interest rate

0.78%

1.97%

2.49%

Dividend yield

5.40%

4.20%

3.40%

Volatility factors

0.283

0.277

0.272

Expected option life

5 years

5 years

Summary Of Stock Based Compensation Activity Related To Nonvested RSUs

The following table summarizes activity related to nonvested RSUs during 2012:


	Number of RSUs (In thousands)			Weighted Average Grant-Date Fair Value Per Share
Nonvested at December 31, 2011		4,302			$	78.25
Granted		1,987				81.93
Vested		(1,299	)			80.64
Forfeited		(168	)			79.03
Nonvested at December 31, 2012		4,822			$	79.10