CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Income Statement [Abstract]
Revenue	$ 2,620	$ 2,917	$ 8,434	$ 9,005
Operating costs and expenses:
Cost of revenue	1,259	1,305	4,022	4,039
Billable expenses	774	939	2,573	2,852
General and administrative expenses	317	342	948	896
Depreciation and amortization	40	40	121	123
Total operating costs and expenses	2,390	2,626	7,664	7,910
Operating income	230	291	770	1,095
Interest expense, net	(47)	(42)	(139)	(126)
Other income (expense)	4	(1)	5	6
Income before income taxes	187	248	636	975
Income tax (benefit) expense	(13)	61	(10)	233
Net income	$ 200	$ 187	$ 646	$ 742
Earnings per share of common stock (Note 4):
Basic (in dollars per share)	$ 1.64	$ 1.46	$ 5.23	$ 5.75
Diluted (in dollars per share)	$ 1.63	$ 1.45	$ 5.22	$ 5.73