Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Increase (Decrease) in Stockholders' Equity
Balance as of beginning of period	$ (381)	$ (238)
Other comprehensive (loss) income before reclassifications	(135)	153
Amounts reclassified from accumulated other comprehensive loss, net	88	(48)
Other comprehensive income, net of tax	(47)	105
Balance as of end of period	(428)	(133)
Currency Translation
Increase (Decrease) in Stockholders' Equity
Balance as of beginning of period	(340)	(293)
Other comprehensive (loss) income before reclassifications	(22)	(16)
Amounts reclassified from accumulated other comprehensive loss, net	0	0
Other comprehensive income, net of tax	(22)	(16)
Balance as of end of period	(362)	(309)
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity
Balance as of beginning of period	(62)	(5)
Other comprehensive (loss) income before reclassifications	(113)	171
Amounts reclassified from accumulated other comprehensive loss, net	90	(47)
Other comprehensive income, net of tax	(23)	124
Balance as of end of period	(85)	119
Postretirement Benefit Plans
Increase (Decrease) in Stockholders' Equity
Balance as of beginning of period	21	60
Other comprehensive (loss) income before reclassifications	0	(2)
Amounts reclassified from accumulated other comprehensive loss, net	(2)	(1)
Other comprehensive income, net of tax	(2)	(3)
Balance as of end of period	$ 19	$ 57