CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 1,062	$ 932	$ 2,129	$ 2,049
Other comprehensive income (loss), net of tax:
Pension/postretirement obligations	5	(2)	(4)	1
Unrealized gain on cash flow hedges	1	1	2	2
Unrecognized loss on available-for-sale investments	0	(88)	(1)	(87)
Share of other comprehensive loss of equity method investments	(4)	0	(5)	0
Currency translation adjustments	3	(1,156)	(852)	(1,606)
Total Other Comprehensive Income (Loss)	5	(1,245)	(860)	(1,690)
Total Comprehensive Income (Loss)	1,067	(313)	1,269	359
Comprehensive income (loss) attributable to noncontrolling interests	5	(33)	(28)	(27)
Comprehensive Income (Loss) Attributable to Walgreens Boots Alliance, Inc.	$ 1,062	$ (280)	$ 1,297	$ 386