REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS - Revision to financial statements (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Mar. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of services	$ 3,677	$ 4,162
Total costs and expenses	4,493	5,065
Income (loss) before income taxes	(205)	(313)
Provision for income taxes	45	76
Net income (loss)	(250)	(389)
Foreign currency translation adjustments	(267)	17
Other comprehensive income (loss), before tax	(263)	22
Other comprehensive income (loss), net of tax	(264)	21
Total comprehensive income (loss)	(514)	(368)
Accrued contract costs	476	413	$ 676
Total current liabilities	4,609	3,676	5,058
Other liabilities	474	297	449
Total liabilities	10,093	6,134	10,730
Net parent investment		6,040
Accumulated other comprehensive income (loss)	(1,353)	(1,161)	(1,089)
Total Net Parent investment		4,879
Total equity	2,211	4,932	2,711	$ 4,902
Cash flows from operating activities:
Net income (loss)	(250)	(389)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Taxes (including items settled with former Parent in prior-year period).	12	106
Other assets and other liabilities	$ (224)	(43)
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of services		4,167
Total costs and expenses		5,070
Income (loss) before income taxes		(319)
Provision for income taxes		74
Net income (loss)		(393)
Foreign currency translation adjustments		19
Other comprehensive income (loss), before tax		24
Other comprehensive income (loss), net of tax		23
Total comprehensive income (loss)		(370)
Accrued contract costs		489
Total current liabilities		3,752
Other liabilities		278
Total liabilities		6,190
Net parent investment		5,985
Accumulated other comprehensive income (loss)		(1,163)
Total Net Parent investment		4,822
Total equity		4,875
Cash flows from operating activities:
Net income (loss)		(393)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Taxes (including items settled with former Parent in prior-year period).		105
Other assets and other liabilities		(38)
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of services		(5)
Total costs and expenses		(5)
Income (loss) before income taxes		5
Provision for income taxes		1
Net income (loss)		4
Foreign currency translation adjustments		(2)
Other comprehensive income (loss), before tax		(2)
Other comprehensive income (loss), net of tax		(2)
Total comprehensive income (loss)		2
Accrued contract costs		(76)
Total current liabilities		(76)
Other liabilities		19
Total liabilities		(57)
Net parent investment		55
Accumulated other comprehensive income (loss)		2
Total Net Parent investment		57
Total equity		57
Cash flows from operating activities:
Net income (loss)		4
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Taxes (including items settled with former Parent in prior-year period).		1
Other assets and other liabilities		$ (5)
Over-accrual of Accrued contract costs | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accrued contract costs			$ 87