Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024
Common Stock, Shares Authorized, Unlimited [Fixed List]	Unlimited	Unlimited
Common stock, shares issued (in shares)	600,000,000	600,000,000
Common stock, shares outstanding (in shares)	600,000,000	600,000,000
Third Party
Accounts receivable, allowance for credit loss	$ 6	$ 7