Significant Accounting Policies - Receivables, Net (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 31, 2021
Receivables, Net, Current [Abstract]
Customer accounts	$ 16,438	$ 17,106
Other	2,289	2,325
Total receivables	18,727	19,431
Allowances	(144)	(250)
Receivables, net	$ 18,583	$ 19,181

Accounts Receivable, Customer Accounts, Gross

No definition available.

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- Definition

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.

+ References

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

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- Definition

Amount, before allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

+ References

No definition available.

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- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

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