Segment Reporting - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019	Aug. 31, 2019	Mar. 01, 2019
Segment Reporting Information [Line Items]
Remainingownershipacquired						75.00%
Revenues	$ 6,598,226	$ 6,483,539	$ 14,219,711	$ 14,967,828
Revenue From Contract With Customer Net of Intersegment Revenue Excluding Assessed Tax	6,598,226	6,483,539	14,219,711	14,967,828
Operating earnings (loss)	115,485	249,645	272,697	564,143
Interest Expense	33,411	41,269	68,382	80,177
Other (income) loss	(11,352)	(11,763)	(24,850)	(36,897)
Equity (income) loss from investments	(34,398)	(41,716)	(84,060)	(108,224)
Income (loss) before income taxes	127,824	261,855	313,225	629,087
Total assets	17,022,615		17,022,615		$ 16,447,494
Energy
Segment Reporting Information [Line Items]
Revenues, including intersegment revenues	1,561,908	1,570,968	3,589,803	3,881,048
Revenues	1,461,050	1,474,777	3,356,473	3,636,065
Revenue From Contract With Customer Net of Intersegment Revenue Excluding Assessed Tax	1,461,050	1,474,777	3,356,473	3,636,065
Operating earnings (loss)	137,187	301,721	298,386	537,360
Interest Expense	(187)	(1,652)	187	2,585
Other (income) loss	(938)	(2,217)	(1,902)	(3,203)
Equity (income) loss from investments	(609)	(995)	(973)	(1,068)
Income (loss) before income taxes	138,921	306,585	301,074	539,046
Total assets	4,627,515		4,627,515
Ag
Segment Reporting Information [Line Items]
Revenues, including intersegment revenues	5,127,441	4,998,137	10,843,434	11,306,851
Revenues	5,124,202	4,994,545	10,836,057	11,299,942
Revenue From Contract With Customer Net of Intersegment Revenue Excluding Assessed Tax	5,124,202	4,994,545	10,836,057	11,299,942
Operating earnings (loss)	(6,809)	(47,129)	(7,226)	32,998
Interest Expense	20,759	25,398	41,500	46,398
Other (income) loss	(11,395)	(10,257)	(22,848)	(32,657)
Equity (income) loss from investments	4,672	128	8,829	1,337
Income (loss) before income taxes	(20,845)	(62,398)	(34,707)	17,920
Total assets	7,112,493		7,112,493
Nitrogen Production [Member]
Segment Reporting Information [Line Items]
Revenues, including intersegment revenues	0	0	0	0
Operating earnings (loss)	(10,559)	(9,880)	(18,381)	(15,008)
Interest Expense	11,971	15,342	24,101	29,021
Other (income) loss	(348)	(392)	(1,916)	(1,963)
Equity (income) loss from investments	(27,923)	(35,542)	(62,757)	(76,457)
Income (loss) before income taxes	5,741	10,712	22,191	34,391
Total assets	2,701,686		2,701,686
Corporate and Other
Segment Reporting Information [Line Items]
Revenues, including intersegment revenues	14,049	16,694	29,999	35,761
Revenues	12,974	14,217	27,181	31,821
Revenue From Contract With Customer Net of Intersegment Revenue Excluding Assessed Tax	12,974	14,217	27,181	31,821
Operating earnings (loss)	(4,334)	4,933	(82)	8,793
Interest Expense	3,032	3,299	6,870	4,062
Other (income) loss	(835)	(15)	(2,460)	(963)
Equity (income) loss from investments	(10,538)	(5,307)	(29,159)	(32,036)
Income (loss) before income taxes	4,007	6,956	24,667	37,730
Total assets	2,580,921		2,580,921
Reconciling Amounts
Segment Reporting Information [Line Items]
Revenues	(105,172)	(102,260)	(243,525)	(255,832)
Operating earnings (loss)	0	0	0	0
Interest Expense	(2,164)	(1,118)	(4,276)	(1,889)
Other (income) loss	2,164	1,118	4,276	1,889
Equity (income) loss from investments	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Total assets	0		0
Operating Segments [Member] \| Energy
Segment Reporting Information [Line Items]
Intersegment Revenue	(100,858)	(96,191)	(233,330)	(244,983)
Operating Segments [Member] \| Ag
Segment Reporting Information [Line Items]
Intersegment Revenue	(3,239)	(3,592)	(7,377)	(6,909)
Operating Segments [Member] \| Nitrogen Production [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0	0
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	(1,075)	(2,477)	(2,818)	(3,940)
Reconciling Amounts
Segment Reporting Information [Line Items]
Intersegment Revenue	$ 105,172	$ 102,260	$ 243,525	$ 255,832

Intersegment Revenue

No definition available.

Name:	chscp_IntersegmentRevenue
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Remainingownershipacquired

+ References

No definition available.

+ Details

Name:	chscp_Remainingownershipacquired
Namespace Prefix:	chscp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Revenue From Contract With Customer, Including Intersegment Revenue, Excluding Assessed Tax

+ References

No definition available.

+ Details

Name:	chscp_RevenueFromContractWithCustomerIncludingIntersegmentRevenueExcludingAssessedTax
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenue From Contract With Customer Net of Intersegment Revenue Excluding Assessed Tax

+ References

No definition available.

+ Details

Name:	chscp_RevenueFromContractWithCustomerNetofIntersegmentRevenueExcludingAssessedTax
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(f))
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

+ Details

Name:	us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (210.5-03(11))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

+ Details

Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income related to nonoperating activities, classified as other.

+ References

+ Details

Name:	us-gaap_OtherNonoperatingIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=chscp_EnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=chscp_AgMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=chscp_NitrogenProductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: