Share-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2011

Share-Based Compensation Plans [Abstract]

Amounts of share-based compensation cost recorded in the Consolidated Statement of Income

     The following table provides amounts of share-based compensation cost recorded in the Consolidated Statement of Income:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
($ in millions)	2011			2010			2011			2010
Pretax share-based compensation expense	$	86		$	125		$	287		$	400
Income tax benefit		(30	)		(42	)		(99	)		(136	)
Total share-based compensation expense, net of taxes	$	56		$	83		$	188		$	264

Assumptions for weighted average fair value of options granted

The weighted-average fair value of options granted for the first nine months of 2011 and 2010 was $5.37 and $7.99 per option, respectively, and was determined using the following assumptions:

	Nine Months Ended
	September 30,
	2011			2010
Expected dividend yield		4.3	%		4.1	%
Risk-free interest rate		2.6	%		2.8	%
Expected volatility		23.2	%		33.7	%
Expected life (years)		7.0			6.8