RELATED PARTY TRANSACTIONS - Acquired Intangible Assets (Details) - IBM - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cost of services
Related Party Transaction [Line Items]
Fee for use of acquired intangible assets	$ 26	$ 31	$ 15
Selling, general and administrative expense.
Related Party Transaction [Line Items]
Fee for use of acquired intangible assets	$ 37	$ 49	$ 23

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration