Investments in Marketable Securities - Additional Information (Details) - USD ($)	9 Months Ended	12 Months Ended
	Dec. 31, 2023	Mar. 31, 2023
Marketable Securities [Abstract]
Fair value option elected	$ 798,000,000	$ 770,000,000
Available-for-sale debt securities unrealized loss	$ 58,000,000	$ 57,000,000
Private placement share redemption percentage	1.00%
Private placement share redemption amount	$ 250,000
Share redemption period	90 days