v3.26.1
Segment and Geographic Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]      
Revenue $ 4,920 $ 4,007 $ 3,233
Staff costs: Share-based compensation cost (equity settled) (1,052) (820) (1,070)
Other non-staff costs (3) 5 (80)
Operating income (loss) 900 831 111
Income (loss) from equity investments, net 14 (237) (20)
Interest income, net 111 116 110
Other non-operating income (loss), net 132 10 11
Income (loss) before income taxes 1,157 720 212
Income tax benefit (expense) (253) 72 94
Net income (loss) 904 792 306
Reportable Segment      
Segment Reporting Information [Line Items]      
Revenue 4,920 4,007 3,233
Staff costs: Salaries, bonuses and benefits (1,674) (1,320) (1,300)
Staff costs: Share-based compensation cost (equity settled) (1,052) (820) (1,037)
Staff costs: Employer taxes related to share-based compensation (160) (224) (176)
Project materials costs, third-party fees paid to consultants, information technology, research and development expenses (excluding employee-related expenses), accounting and legal professional services fees, advertising expenses, and other corporate-related expenses (881) (634) (367)
Amortization (100) (87) (86)
Depreciation (150) (96) (76)
Operating income (loss) $ 900 $ 831 $ 111
Operating margin 18.00% 21.00% 3.00%
Income (loss) from equity investments, net $ 14 $ (237) $ (20)
Interest income, net 111 116 110
Other non-operating income (loss), net 132 10 11
Income (loss) before income taxes 1,157 720 212
Income tax benefit (expense) (253) 72 94
Net income (loss) 904 792 306
License and Other Revenue      
Segment Reporting Information [Line Items]      
Revenue 2,307 1,839 1,431
License and Other Revenue | Reportable Segment      
Segment Reporting Information [Line Items]      
Revenue 2,307 1,839 1,431
Royalty Revenue      
Segment Reporting Information [Line Items]      
Revenue 2,613 2,168 1,802
Royalty Revenue | Reportable Segment      
Segment Reporting Information [Line Items]      
Revenue $ 2,613 $ 2,168 $ 1,802