Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 1,121	$ 965	$ 2,077	$ 1,740
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(16)	0	(18)	0
Other comprehensive income (loss):
Net cash flow hedges, net of tax	0	0	1	1
Comprehensive income	1,105	965	2,060	1,741
Comprehensive loss attributable to noncontrolling interest	0	1	0	2
Comprehensive income attributable to CVS Caremark	$ 1,105	$ 966	$ 2,060	$ 1,743