Equities Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Feb. 28, 2022	Nov. 30, 2021	Feb. 28, 2021	Nov. 30, 2020	Feb. 28, 2022	Feb. 28, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 9,249,926	$ 9,017,326	$ 8,785,856	$ 8,819,173	$ 9,017,326	$ 8,819,173
Reversal of prior year patronage and redemption estimates	35,094	12,221	26,135	7,726
patronage refund	(30,043)		(21,416)
Redemptions of equities	(5,264)	(12,221)	(4,760)	(7,726)
Preferred stock dividends	(42,167)	(84,334)	(42,167)	(84,334)
Other, net	(554)	(518)	666	(8,661)
Net income (loss)	218,896	451,943	(38,358)	69,369	670,839	31,011
Net income (loss) attributable to CHS Inc.	219,000		(38,229)		670,961	31,442
Net loss attributable to noncontrolling interests	(104)		(129)		(122)	(431)
Other comprehensive income, net of tax	9,954	(15,418)	2,549	8,917	(5,464)	11,466
Estimated 2022 cash patronage refunds	(22,466)	(39,691)	5,639	(9,304)
Estimated 2022 equity redemptions	(44,932)	(79,382)	5,639	(9,304)
Ending Balance	9,368,444	9,249,926	8,719,783	8,785,856	9,368,444	8,719,783
Capital equity certificates [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	3,505,903	3,583,911	3,715,416	3,724,187	3,583,911	3,724,187
Reversal of prior year patronage and redemption estimates	5,264	12,221	4,760	7,726
Redemptions of equities	(4,228)	(9,824)	(4,177)	(6,539)
Other, net	(5)	(1,023)	(26)	(654)
Estimated 2022 equity redemptions	(44,932)	(79,382)	5,639	(9,304)
Ending Balance	3,462,002	3,505,903	3,721,612	3,715,416	3,462,002	3,721,612
Nonpatronage Equity Certificates [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	28,130	28,431	28,649	28,727	28,431	28,727
Reversal of prior year patronage and redemption estimates	0	0	0	0
Redemptions of equities	(20)	(318)	(35)	(31)
Other, net		17		(47)
Ending Balance	28,110	28,130	28,614	28,649	28,110	28,614
Non-qualified Equity Certificates [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	1,632,753	1,634,896	1,407,343	1,408,696	1,634,896	1,408,696
Reversal of prior year patronage and redemption estimates	(230,290)	0	(211,970)	0
patronage refund	231,371		214,720
Redemptions of equities	(1,016)	(2,079)	(548)	(1,156)
Other, net		(64)	(15)	(197)
Ending Balance	1,632,818	1,632,753	1,409,530	1,407,343	1,632,818	1,409,530
Preferred Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,264,038	2,264,038	2,264,038	2,264,038	2,264,038	2,264,038
Redemptions of equities	0	0	0	0
Ending Balance	2,264,038	2,264,038	2,264,038	2,264,038	2,264,038	2,264,038
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(231,809)	(216,391)	(225,007)	(233,924)	(216,391)	(233,924)
Other comprehensive income, net of tax	9,954	(15,418)	2,549	8,917
Ending Balance	(221,855)	(231,809)	(222,458)	(225,007)	(221,855)	(222,458)
Capital Reserves [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,043,305	1,713,976	1,586,382	1,618,147	1,713,976	1,618,147
Reversal of prior year patronage and redemption estimates	260,120	0	233,345	0
patronage refund	(261,414)		(236,136)
Preferred stock dividends	(42,167)	(84,334)	(42,167)	(84,334)
Other, net	50	1,393	1,068	(7,798)
Net income (loss) attributable to CHS Inc.	219,000	451,961	(38,229)	69,671
Estimated 2022 cash patronage refunds	(22,466)	(39,691)	5,639	(9,304)
Ending Balance	2,196,428	2,043,305	1,509,902	1,586,382	2,196,428	1,509,902
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	7,606	8,465	9,035	9,302	8,465	9,302
Other, net	(599)	(841)	(361)	35
Net loss attributable to noncontrolling interests	(104)	(18)	(129)	(302)
Ending Balance	$ 6,903	$ 7,606	$ 8,545	$ 9,035	$ 6,903	$ 8,545