CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 287,268	$ 302,002	$ 1,444,947	$ 721,828
Other comprehensive income (loss)
Foreign currency translation adjustments	3,181	(1,158)	(27,224)	(5,118)
Other	(690)	33	(656)	146
Total other comprehensive income (loss)	2,491	(1,125)	(27,880)	(4,972)
Total comprehensive income	289,759	300,877	1,417,067	716,856
Comprehensive loss (income) attributable to noncontrolling interest	3,824	(659)	3,590	(1,740)
Comprehensive income attributable to AmerisourceBergen Corporation	$ 293,583	$ 300,218	$ 1,420,657	$ 715,116