Revenue - Additional Information (Details) $ in Millions	12 Months Ended
Aug. 31, 2023 USD ($) ExternalCustomer	Aug. 31, 2022 USD ($) ExternalCustomer	Aug. 31, 2021 ExternalCustomer
Revenue from Contract with Customer [Abstract]
Number of external customer that accounted more than ten percentage of consolidated revenues \| ExternalCustomer	0	0	0
Percentage of external customer that not accounted for consolidated revenues	10.00%
Receivables from contracts with customers, net of allowance for credit losses	$ 208	$ 230
Percentage of receivables from contracts with customers of accounts receivable	99.00%	97.00%
Contract liabilities	$ 7	$ 8

Number of external customer that accounted more than ten percentage of consolidated revenues.

No definition available.

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- Definition

Percentage of external customer that not accounted for consolidated revenues.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage receivables from contracts with customers net, of total accounts receivables as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	rdus_PercentageReceivablesFromContractsWithCustomersOfAccountsReceivable
Namespace Prefix:	rdus_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-9

+ Details

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

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479837/606-10-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-8

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479837/606-10-45-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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