Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ (2,563)	$ 1,098	$ (1,565)	$ 2,051
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	(27)	(10)	(26)	(2)
Net cash flow hedges, net of tax	(4)		339	1
Total other comprehensive income (loss)	(31)	(10)	313	(1)
Comprehensive income (loss)	(2,594)	1,088	(1,252)	2,050
Comprehensive income attributable to noncontrolling interest				(1)
Comprehensive income (loss) attributable to CVS Health	$ (2,594)	$ 1,088	$ (1,252)	$ 2,049