ACQUISITIONS, Acquisition-Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Business Acquisition [Line Items]
Acquisition-related expenses	$ 11	$ 0	$ 17	$ 2
Legal and other professional fees
Business Acquisition [Line Items]
Acquisition-related expenses	5	0	7	2
Identifiable intangible asset amortization
Business Acquisition [Line Items]
Acquisition-related expenses	0	0	4	0
Other
Business Acquisition [Line Items]
Acquisition-related expenses	$ 6	$ 0	$ 6	$ 0

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460

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