Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net revenues	$ 35,021	$ 31,932		$ 102,312	$ 93,931
Cost of revenues	28,553	25,905		83,578	76,487
Gross profit	6,468	6,027		18,734	17,444
Operating expenses	4,222	3,873		12,256	11,624
Operating profit	2,246	2,154	[1]	6,478	5,820	[1]
Interest expense, net	153	122		469	374
Loss on Extinguishment of Debt	521			521
Income before income tax provision	1,572	2,032		5,488	5,446
Income tax provision	624	777		2,165	2,112
Income from continuing operations	948	1,255		3,323	3,334
Loss from discontinued operations, net of tax	0	(6)		0	(7)
Net income	$ 948	$ 1,249		$ 3,323	$ 3,327
Basic earnings per share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.82	$ 1.03		$ 2.84	$ 2.72
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00	$ 0.00		$ 0.00	$ (0.01)
Earnings Per Share, Basic	$ 0.82	$ 1.03		$ 2.84	$ 2.71
Weighted averages shares outstanding, basic (in shares)	1,157	1,218		1,167	1,226
Diluted earnings per share:
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.81	$ 1.02		$ 2.82	$ 2.70
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ 0.00		$ 0.00	$ (0.01)
Earnings Per Share, Diluted	$ 0.81	$ 1.02		$ 2.82	$ 2.70
Weighted averages shares outstanding, diluted (in shares)	1,164	1,226		1,175	1,234
Dividends declared per share	$ 0.275	$ 0.225		$ 0.825	$ 0.675

[1] Consolidated operating profit for the three and nine months ended September 30, 2013 includes a $72 million gain on a legal settlement, of which, $11 million is included in the Pharmacy Services Segment and $61 million is included in the Retail Pharmacy Segment.