Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Shareholders' Equity [Abstract]

Summary of stock options activity

						Average	Aggregate
				Average		Remaining	Intrinsic
				Exercise		Contractual	Value
	Shares			Price		Term	(in millions)
Outstanding at January 1, 2011		8,484,233		$	24.98
Granted		1,122,525		$	34.34
Exercised		(1,576,664	)	$	21.14
Forfeited/Cancelled		(107,620	)	$	26.47
Outstanding at December 31, 2011		7,922,474		$	27.05	6.0 years	$	78
Options exercisable at December 31, 2011		4,580,849		$	26.29	4.7 years	$	49

Assumptions used in estimating weighted average fair value of options on grant date

	2011			2010			2009
Expected dividend yield		1.9	%		2.2	%		2.7	%
Expected volatility		38	%		39	%		37	%
Expected term (in years)		7.3			7.5			7.5
Risk-free rate		3.0	%		3.2	%		2.1	%

Summary of restricted stock awards activity

				Average
				Grant Date
	Shares			Fair Value
Outstanding at January 1, 2011		322,986		$	25.27
Granted		131,955		$	31.45
Vested		(39,819	)	$	28.41
Outstanding at December 31, 2011		415,122		$	27.85

Accumulated other comprehensive income (loss), net of tax

							Pension
							and Other
	Pretax			Foreign			Post-									Accumulated
	Net Unrealized			Currency			Retirement						Noncon-			Other
	Gains (Losses)			Translation			Plans			Tax			trolling			Comprehensive
	on Securities			Adjustment			Adjustment			Effects			Interests			Income (Loss)
Balance at January 1, 2009	$	(1,058	)	$	(18	)	$	(11	)	$	374		$	10		$	(703	)
Cumulative effect of accounting change		(27	)		—			—			10			—			(17	)
Unrealized holding gains on securities arising during the year		1,413			—			—			(490	)		(9	)		914
Realized gains included in net income		(70	)		—			—			19			3			(48	)
Foreign currency translation gains		—			19			—			—			(1	)		18
Other		—			—			(2	)		1			—			(1	)
Balance at December 31, 2009		258	(a)		1			(13	)		(86	)		3			163
Unrealized holding gains on securities arising during the year		596			—			—			(208	)		(4	)		384
Realized gains included in net income		(112	)		—			—			39			2			(71	)
Foreign currency translation gains		—			8			—			—			—			8
Other		(6	)		—			—			2			(1	)		(5	)
Balance at December 31, 2010		736	(a)		9			(13	)		(253	)		—			479
Unrealized holding gains on securities arising during the year		238			—			—			(84	)		(7	)		147
Realized gains included in net income		(105	)		—			—			37			2			(66	)
Unrealized gains of subsidiary sold		(2	)		—			—			1			—			(1	)
Foreign currency translation losses		—			(2	)		—			—			(1	)		(3	)
Other		—			—			1			—			—			1
Balance at December 31, 2011	$	867		$	7		$	(12	)	$	(299	)	$	(6	)	$	557

(a) Includes $25 million, $17 million and $98 million at December 31, 2011, 2010 and 2009 in net pretax unrealized losses ($15 million, $11 million and $63 million, respectively, net of tax) related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.