CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net Earnings	$ 4,279	$ 2,031	$ 2,548
Other comprehensive income (loss), net of tax:
Pension/postretirement obligations	14	(48)	(5)
Unrealized (loss) on cash flow hedges	(13)	(27)	0
Unrecognized gain on available-for-sale investments	152	106	1
Share of other comprehensive income (loss) of Alliance Boots	113	(18)	(95)
Currency translation adjustments	(622)	215	(61)
Total Other Comprehensive Income (Loss)	(356)	228	(160)
Total Comprehensive Income	3,923	2,259	2,388
Comprehensive income attributable to noncontrolling interests	53	99	0
Comprehensive Income Attributable to Walgreens Boots Alliance, Inc.	$ 3,870	$ 2,160	$ 2,388