Equity Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2011

Equity Compensation Plans [Abstract]

Schedule Of Stock-Based Compensation Expenses

Year Ended December 31	2009		2010		2011
Stock options	$	54	$	53	$	58
Restricted stock		22		24		25
Total stock-based compensation expense, net of tax*	$	76	$	77	$	83

* Stock-based compensation expense (pretax) is included in G&A expenses.

Schedule Of Assumptions Of Fair Value Options On The Date Of Grant Using Black-Scholes Option Pricing Model

Year Ended December 31	2009		2010		2011
Expected volatility		24.0-30.2%		27.0-31.9%		28.4-31.5%
Weighted average expected volatility		25.5%		29.8%		30.1%
Expected term (in months)		40-50		40-50		43-53
Risk-free interest rate		1.4-2.8%		1.0-2.2%		1.2-1.9%
Expected dividend yield		2.0%		2.0%		2.0%

Summary Of Stock Option Activity

	Shares Under Option		Weighted Average Exercise Price
Outstanding on December 31, 2010		27,444,169	$	64.67
Granted		6,609,514		74.48
Exercised		(4,144,982)		47.01
Forfeited/cancelled		(604,048)		73.55
Outstanding on December 31, 2011		29,304,653	$	69.19
Vested and expected to vest on December 31, 2011		28,951,420	$	69.15
Exercisable on December 31, 2011		19,580,192	$	67.33

Schedule Of Stock Options' Intrinsic Value And Remaining Contractual Term

	Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Outstanding	2.7	$	164
Vested and expected to vest	2.7		163
Exercisable	1.6		154

Summary Of Restricted Stock And Restricted Stock Unit Activity

	Shares/ Share-Equivalent Units		Weighted Average Grant-Date Fair Value
Nonvested at December 31, 2010		2,261,990	$	62.38
Granted		593,574		74.64
Vested		(398,656)		76.25
Forfeited		(35,875)		68.64
Nonvested at December 31, 2011		2,421,033	$	63.01