STOCK-BASED COMPENSATION (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2021
Stock-based compensation cost, allocation of recognized costs
Pretax stock-based compensation expense	$ 31	$ 95	$ 113	$ 71
Income tax benefits	(5)	(5)	(5)	(13)
Stock-based compensation cost, net of tax	26	90	108	58
Unrecognized compensation cost related to non-vested awards		$ 137
Unrecognized compensation cost related to non-vested awards, weighted average period of recognition		2 years 1 month 6 days
Cost of service
Stock-based compensation cost, allocation of recognized costs
Pretax stock-based compensation expense	7	$ 16	21	28
Selling, general and administrative expense.
Stock-based compensation cost, allocation of recognized costs
Pretax stock-based compensation expense	$ 24	$ 78	$ 92	$ 44

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 2
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