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Significant Accounting Policies - Receivables, Net (Details) - USD ($) $ in Millions	Mar. 31, 2023	Mar. 31, 2022
Accounting Policies [Abstract]
Customer accounts	$ 17,160	$ 16,438
Other	2,408	2,289
Total receivables	19,568	18,727
Allowances	(158)	(144)
Receivables, net	$ 19,410	$ 18,583

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Accounts Receivable, Customer Accounts, Gross

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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

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