COMMITMENTS, CONTINGENCIES AND GUARANTEES, Commitments and Contingencies (Details) $ in Millions	9 Months Ended
Jun. 30, 2022 USD ($) agreement
Underwriting commitment
Commitments [Line Items]
Number of open underwriting commitments \| agreement	2
Independent venture capital or private equity investment commitment
Commitments [Line Items]
Amount of commitment	$ 43
Commitment to lend to RJTCF
Commitments [Line Items]
Amount of commitment	$ 151
Number of days that investments in project partnerships typically sold	90 days

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

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