Exhibit 12

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
(in millions, except ratios)	2008		2009		2010		2011		2012
Earnings:
Pre-tax income from continuing operations	$	5,854	$	8,381	$	10,796	$	12,326	$	13,386
Add:
Fixed charges		108		109		103		185		233
Pre-tax income from continuing operations plus fixed charges	$	5,962	$	8,490	$	10,899	$	12,511	$	13,619
Fixed charges:
Interest expense and amortization of capitalized expenses related to indebtedness	$	3	$	1	$	5	$	58	$	84
Estimated interest component included in rent expense		105		108		98		127		149
Total fixed charges	$	108	$	109	$	103	$	185	$	233
Ratio of earnings to fixed charges		55		78		106		68		58