CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Mar. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 56	$ 61
Ordinary shares, par value (in dollars per share)	$ 0	$ 0
Ordinary shares, issued (in shares)	516,858,940	542,807,200
Ordinary shares, outstanding (in shares)	466,619,585	492,567,845
Treasury stock (in shares)	50,239,355	50,239,355

Amount of allowance for credit loss on accounts receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Face amount per share of no-par value common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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