Segments of Business - Schedule of Long-lived Assets By Geographic Areas (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025
Segment Reporting Information [Line Items]
Total long-lived assets	$ 3,282	$ 3,183
United States
Segment Reporting Information [Line Items]
Total long-lived assets	2,952	2,877
Foreign
Segment Reporting Information [Line Items]
Total long-lived assets	$ 330	$ 306