Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per common share

The following is a reconciliation of basic and diluted net income per share for the respective periods:

	Three Months Ended March 31,
In millions, except per share amounts	2015		2014
Numerator for earnings per share calculations:
Net income(1)	$	1,216	$	1,129
Denominators for earnings per share calculations:
Weighted average shares, basic	1,128		1,180
Effect of dilutive securities	8		10
Weighted average shares, diluted	1,136		1,190
Net income per share:
Basic	$	1.08	$	0.96
Diluted	$	1.07	$	0.95

(1) Comprised of net income less amounts allocable to participating securities of $5 million for the three months ended March 31, 2015.