Equities Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	$ 9,728,845	$ 9,249,926	$ 9,461,266	$ 9,017,326
Reversal of prior year patronage and redemption estimates	385,444	35,094	398,385	47,315
patronage refund	(381,890)	(30,043)	(381,890)	(30,043)
Equity Certificates Repurchased and Retired During Period, Value	(4,805)	(5,264)	(17,746)	(17,485)
Dividends, Preferred Stock, Cash	(42,167)	(42,167)	(126,501)	(126,501)
Stockholders' Equity, Other	210	(554)	553	(1,072)
Net income (loss)	292,048	218,896	1,074,964	670,839
Net income (loss) attributable to CHS Inc.	292,321	219,000	1,074,919	670,961
Net (loss) income attributable to noncontrolling interests	(273)	(104)	45	(122)
Other Comprehensive Income (Loss), Net of Tax	11,790	9,954	(1,828)	(5,464)
Patronage Refunds, Estimated	(80,078)	(22,466)	(288,942)	(62,157)
Equity Redemptions, Estimate	(80,078)	(44,932)	(288,942)	(124,314)
Ending Balance	9,829,319	9,368,444	9,829,319	9,368,444
Capital equity certificates [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	3,381,478	3,505,903	3,587,131	3,583,911
Reversal of prior year patronage and redemption estimates	(503,999)	5,264	(491,058)	17,485
patronage refund	513,631		513,631
Equity Certificates Repurchased and Retired During Period, Value	(3,889)	(4,228)	(13,910)	(14,052)
Stockholders' Equity, Other	(3)	(5)	288	(1,028)
Equity Redemptions, Estimate	(80,078)	(44,932)	(288,942)	(124,314)
Ending Balance	3,307,140	3,462,002	3,307,140	3,462,002
Nonpatronage Equity Certificates [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	27,875	28,130	27,933	28,431
Reversal of prior year patronage and redemption estimates	0	0	0	0
Equity Certificates Repurchased and Retired During Period, Value	(14)	(20)	(72)	(338)
Stockholders' Equity, Other				17
Ending Balance	27,861	28,110	27,861	28,110
Non-qualified Equity Certificates [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	1,773,367	1,632,753	1,776,172	1,634,896
Reversal of prior year patronage and redemption estimates	(153,858)	(230,290)	(153,858)	(230,290)
patronage refund	153,258	231,371	153,258	231,371
Equity Certificates Repurchased and Retired During Period, Value	(902)	(1,016)	(3,764)	(3,095)
Stockholders' Equity, Other	(21)		36	(64)
Ending Balance	1,771,844	1,632,818	1,771,844	1,632,818
Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	2,264,038	2,264,038	2,264,038	2,264,038
Equity Certificates Repurchased and Retired During Period, Value	0	0	0	0
Ending Balance	2,264,038	2,264,038	2,264,038	2,264,038
Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	(268,953)	(231,809)	(255,335)	(216,391)
Other Comprehensive Income (Loss), Net of Tax	11,790	9,954	(1,828)	(5,464)
Ending Balance	(257,163)	(221,855)	(257,163)	(221,855)
Capital Reserves [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	2,545,102	2,043,305	2,055,682	1,713,976
Reversal of prior year patronage and redemption estimates	1,043,301	260,120	1,043,301	260,120
patronage refund	(1,048,779)	(261,414)	(1,048,779)	(261,414)
Dividends, Preferred Stock, Cash	(42,167)	(42,167)	(126,501)	(126,501)
Stockholders' Equity, Other	807	50	827	1,443
Net income (loss) attributable to CHS Inc.	292,321	219,000	1,074,919	670,961
Patronage Refunds, Estimated	(80,078)	(22,466)	(288,942)	(62,157)
Ending Balance	2,710,507	2,196,428	2,710,507	2,196,428
Noncontrolling Interest [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	5,938	7,606	5,645	8,465
Stockholders' Equity, Other	(573)	(599)	(598)	(1,440)
Net (loss) income attributable to noncontrolling interests	(273)	(104)	45	(122)
Ending Balance	$ 5,092	$ 6,903	$ 5,092	$ 6,903