Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Options Outstanding and Exercised Under Various Stock Options Plans

 The following is a summary of stock options outstanding and exercised under various stock option plans of the Company:

Year Ended December 31	Stock Options/Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value (in millions)
2013
Number outstanding at beginning of period		63,171,918		$	28.83
Granted		1,168,011			33.99
Exercised		(17,260,740	)		28.41
Cancelled (a)		(354,424	)		29.22
Number outstanding at end of period (b)		46,724,765		$	29.12		4.4	$	527
Exercisable at end of period		39,556,000		$	29.19		3.8	$	444
2012
Number outstanding at beginning of period		75,823,941		$	27.60
Granted		4,180,492			28.65
Exercised		(15,681,323	)		23.12
Cancelled (a)		(1,151,192	)		24.90
Number outstanding at end of period (b)		63,171,918		$	28.83		4.9	$	196
Exercisable at end of period		50,671,654		$	30.12		4.2	$	92
2011
Number outstanding at beginning of period		85,622,705		$	26.80
Granted		4,063,369			28.66
Exercised		(8,508,107	)		19.49
Cancelled (a)		(5,354,026	)		28.44
Number outstanding at end of period (b)		75,823,941		$	27.60		5.2	$	(42	)
Exercisable at end of period		57,039,334		$	29.14		4.4	$	(120	)

(a) Options cancelled include both non-vested (i.e., forfeitures) and vested options.

(b) Outstanding options include stock-based awards that may be forfeited in future periods. The impact of the estimated forfeitures is reflected in compensation expense.

Weighted Average Estimated Fair Value and Assumptions Utilized by Company for Newly Issued Grants

The following table includes the weighted average estimated fair value and assumptions utilized by the Company for newly issued grants:

Year Ended December 31	2013			2012			2011
Estimated fair value	$	12.13		$	10.19		$	10.55
Risk-free interest rates		1.0	%		.9	%		2.5	%
Dividend yield		2.6	%		2.6	%		2.5	%
Stock volatility factor		.49			.49			.47
Expected life of options (in years)		5.5			5.5			5.5

Summary of Certain Stock Option Activity of Company

The following summarizes certain stock option activity of the Company:

Year Ended December 31 (Dollars in Millions)	2013		2012		2011
Fair value of options vested	$	41	$	49	$	54
Intrinsic value of options exercised		144		143		61
Cash received from options exercised		489		362		165
Tax benefit realized from options exercised		56		75		23

Stock Options Outstanding Additional Information

Additional information regarding stock options outstanding as of December 31, 2013, is as follows:

	Outstanding Options						Exercisable Options
Range of Exercise Prices	Shares		Weighted- Average Remaining Contractual Life (Years)		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
$11.02 – $15.00		4,661,087		5.1	$	11.39		4,661,087	$	11.40
$15.01 – $20.00		167,391		2.4		19.54		167,391		19.54
$20.01 – $25.00		3,390,179		6.2		23.85		2,216,001		23.84
$25.01 – $30.00		13,108,918		5.2		29.05		8,276,837		29.29
$30.01 – $35.00		17,999,955		3.9		31.97		16,837,858		31.83
$35.01 – $36.25		7,397,235		3.1		36.07		7,396,826		36.07
Total		46,724,765		4.4	$	29.12		39,556,000	$	29.19

Summary of Status of Company's Restricted Shares of Stock and Unit Awards

A summary of the status of the Company’s restricted shares of stock and unit awards is presented below:

	2013					2012					2011
Year Ended December 31	Shares			Weighted- Average Grant- Date Fair Value		Shares			Weighted- Average Grant- Date Fair Value		Shares			Weighted- Average Grant- Date Fair Value
Nonvested Shares
Outstanding at beginning of period		8,935,743		$	25.04		8,995,295		$	22.46		8,811,027		$	19.74
Granted		3,717,635			33.88		3,085,077			28.70		3,136,086			28.20
Vested		(3,744,411	)		22.17		(2,931,820	)		20.97		(2,552,979	)		20.15
Cancelled		(255,108	)		29.18		(212,809	)		25.01		(398,839	)		22.20
Outstanding at end of period		8,653,859		$	29.96		8,935,743		$	25.04		8,995,295		$	22.46