Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share Based Compensation [Abstract]

Share-based compensation expense

	Before Income Taxes						After Income Taxes
	2011		2010		2009		2011		2010		2009
	(Millions of dollars)
Stock options	$	51	$	52	$	58	$	31	$	32	$	36
Restricted stock		53		60		70		32		37		44
Total	$	104	$	112	$	128	$	63	$	69	$	80

Stock option and Restricted stock activity

	Stock Options					Restricted Stock
	Options			Weighted- Average Exercise Price per Share		Shares of Restricted Common Stock			Weighted- Average Price on Date of Grant
	(Thousands)					(Thousands)
Outstanding at January 1, 2009		9,700		$	52.73		3,161		$	64.78
Granted		3,135			56.44		1,056			56.27
Exercised		(416	)		38.85		—			—
Vested		—			—		(893	)		50.13
Forfeited		(317	)		65.68		(376	)		66.11
Outstanding at December 31, 2009		12,102			53.83		2,948			66.00
Granted		2,792			60.12		952			60.04
Exercised		(1,080	)		42.37		—			—
Vested		—			—		(880	)		55.42
Forfeited		(394	)		65.04		(182	)		65.56
Outstanding at December 31, 2010		13,420			55.73		2,838			67.32
Granted		2,227			82.92		742			82.99
Exercised		(1,716	)		41.40		—			—
Vested		—			—		(970	)		84.81
Forfeited		(361	)		67.64		(163	)		63.71
Outstanding at December 31, 2011		13,570			61.68		2,447			65.38
Exercisable at December 31, 2009		6,636		$	46.11
Exercisable at December 31, 2010		8,079			51.73
Exercisable at December 31, 2011		8,841			57.37

Summary of information regarding the outstanding and exercisable stock options

Range of Exercise Prices	Outstanding Options						Exercisable Options
	Options		Weighted- Average Remaining Contractual Life		Weighted- Average Exercise Price per Share		Options		Weighted- Average Exercise Price per Share
	(Thousands)		(Years)				(Thousands)
$20.00 – $40.00		1,098		3	$	27.52		1,098	$	27.52
$40.01 – $50.00		1,520		4		49.25		1,520		49.25
$50.01 – $60.00		4,304		6		55.17		3,348		54.77
$60.01 – $80.00		2,584		8		60.57		839		60.63
$80.01 – $120.00		4,064		8		83.18		2,036		82.48
		13,570		7		61.68		8,841		57.37

Weighted average assumptions utilized for Stock options awarded

	2011			2010			2009
Risk free interest rate		1.81	%		2.14	%		1.80	%
Stock price volatility		.395			.390			.390
Dividend yield		.49	%		.67	%		.70	%
Expected life in years		4.5			4.5			4.5
Weighted average fair value per option granted	$	27.98		$	20.18		$	18.47

Number of common shares reserved for issuance under Long Term Incentive Plan

Total common shares reserved for issuance	16,006
Less: stock options outstanding	7,603
Available for future awards of restricted stock and stock options	8,403