Debt (Zhenjiang Loans) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Debt Disclosure [Abstract]
Long-term debt, carrying value	$ 4,876	$ 4,939

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant