Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per common share

The following is a reconciliation of basic and diluted earnings per share from continuing operations for the respective periods:

	Three Months Ended September 30,				Nine Months Ended September 30,
In millions, except per share amounts	2014		2013		2014		2013
Numerator for earnings per share calculations:
Income from continuing operations attributable to common      stockholders(1)	$	944	$	1,255	$	3,310	$	3,334
Denominators for earnings per share calculations:
Weighted average shares, basic	1,157		1,218		1,167		1,226
Effect of dilutive securities	7		8		8		8
Weighted average shares, diluted	1,164		1,226		1,175		1,234
Earnings per share from continuing operations:
Basic	$	0.82	$	1.03	$	2.84	$	2.72
Diluted	$	0.81	$	1.02	$	2.82	$	2.70

(1) Comprised of income from continuing operations less amounts allocable to participating securities of $4 million and $13 million for the three and nine months ended September 30, 2014.