Earnings Per Common Share (EPS) (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share Reconciliation [Abstract]

Computation of basic and diluted EPS

The computations of basic and diluted EPSwere as follows:

			Three Months Ended				Six Months Ended
			June 30,				June 30,
(Millions, except per share amounts)			2013			2012	2013			2012
Numerator:
	Basic and diluted:
		Net income	$	1,405	$	1,339	$	2,685	$	2,595
		Earnings allocated to participating share awards(a)		(13)		(14)		(24)		(28)
		Net income attributable to common shareholders	$	1,392	$	1,325	$	2,661	$	2,567
Denominator:(a)
	Basic: Weighted-average common stock			1,090		1,145		1,094		1,151
	Add: Weighted-average stock options (b)			7		7		7		7
	Diluted			1,097		1,152		1,101		1,158
Basic EPS:			$	1.28	$	1.16	$	2.43	$	2.23
Diluted EPS:			$	1.27	$	1.15	$	2.42	$	2.22

• The Company's unvested restricted stock awards, which include the right to receive non-forfeitable dividends or dividend equivalents, are considered participating securities. Calculations of EPS under the two-class method exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities. The related participating securities are similarly excluded from the denominator.
• Forboth thethree and six months endedJune 30, 2013, the dilutive effect of unexercised stock options excludes0.2 millionof optionsfrom the computationof EPS because inclusion of the options would have been anti-dilutive.For both the three and six months endedJune 30,2012, the dilutive effect of unexercised stock options excludes8 millionoptions from the computationof EPS because inclusion of the options would have been anti-dilutive.