Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning balance	$ 5,308	$ 5,129
Other comprehensive income before reclassifications	12	203
Amounts reclassified from accumulated other comprehensive income (loss)	(95)	(7)
Ending balance	5,087	5,995
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning balance	(554)	(851)
Other comprehensive income before reclassifications	0	197
Amounts reclassified from accumulated other comprehensive income (loss)	(86)	0
Ending balance	(640)	(654)
Foreign Currency Translation Adjustments | HPS Business
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Amounts reclassified from accumulated other comprehensive income (loss)	(86)
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning balance	(1)	(20)
Other comprehensive income before reclassifications	12	12
Amounts reclassified from accumulated other comprehensive income (loss)	(3)	6
Ending balance	8	(2)
Available-for-sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning balance		9
Other comprehensive income before reclassifications		(6)
Amounts reclassified from accumulated other comprehensive income (loss)		0
Ending balance		3
Pension and Other Post-retirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning balance	253	259
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(6)	(13)
Ending balance	247	246
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]
Beginning balance	(302)	(603)
Ending balance	$ (385)	$ (407)