Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Net income (loss)	$ (38,358)	$ 125,694	$ 31,011	$ 304,431
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Pension and other postretirement benefits	3,869	3,746	7,514	8,819
Cash flow hedges	(559)	(5,812)	1,110	(11,684)
Foreign currency translation adjustment	(761)	(8,519)	2,842	(9,358)
Other comprehensive income (loss), net of tax	2,549	(10,585)	11,466	(12,223)
Comprehensive income (loss)	(35,809)	115,109	42,477	292,208
Less comprehensive income attributable to noncontrolling interests	(129)	247	(431)	1,102
Comprehensive Income (Loss) Attributable to CHS	$ (35,680)	$ 114,862	$ 42,908	$ 291,106