Description of business and significant accounting policies and practices (Tables)

12 Months Ended

Dec. 31, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of earnings per share, basic and diluted

Computation and reconciliation of earnings per common share are as follows (shares in millions):

	2013						2012						2011
	Net Income			Shares	EPS		Net Income			Shares	EPS		Net Income			Shares	EPS
Basic EPS:
Net income	$	2,162					$	1,759					$	2,236
Income allocated to RSUs	(37		)				(31		)				(35		)
Income allocated to common stock for basic EPS calculation	$	2,125		1,098	$	1.94	$	1,728		1,132	$	1.53	$	2,201		1,151	$	1.91
Adjustment for dilutive shares:
Stock-based compensation plans				15						14						20
Diluted EPS:
Net income	$	2,162					$	1,759					$	2,236
Income allocated to RSUs	(36		)				(31		)				(34		)
Income allocated to common stock for diluted EPS calculation	$	2,126		1,113	$	1.91	$	1,728		1,146	$	1.51	$	2,202		1,171	$	1.88