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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Condensed Consolidated Financial Statements of Walmart Inc. and its subsidiaries ("Walmart" or the "Company") and the accompanying notes included in this Quarterly Report on Form 10-Q are unaudited. In the opinion of management, all adjustments necessary for the fair presentation of the Condensed Consolidated Financial Statements have been included. Such adjustments are of a normal, recurring nature. The Condensed Consolidated Financial Statements, and the accompanying notes, are prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and do not contain certain information included in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2021 ("fiscal 2021"). Therefore, the interim Condensed Consolidated Financial Statements should be read in conjunction with that Annual Report on Form 10-K. The Company's Consolidated Financial Statements are based on a fiscal year ending January 31 for the United States ("U.S.") and Canadian operations. The Company consolidates all other operations generally using a one-month lag and based on a calendar year. There were no significant intervening events during the month of April related to the consolidated operations using a lag that materially affected the Condensed Consolidated Financial Statements. The Company's business is seasonal to a certain extent due to calendar events and national and religious holidays, as well as weather patterns. Historically, the Company's highest sales volume and operating income have occurred in the fiscal quarter ending January 31.
Use of Estimates	Use of Estimates The Condensed Consolidated Financial Statements have been prepared in conformity with GAAP. Those principles require management to make estimates and assumptions that affect the reported amounts of assets and liabilities. Management's estimates and assumptions also affect the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ materially from those estimates.
Investments	InvestmentsInvestments in equity and debt securities are recorded in other long-term assets in the Condensed Consolidated Balance Sheets. Changes in fair value of equity securities measured on a recurring basis are recognized in other gains and losses in the Condensed Consolidated Statements of Income. Refer to Note 5 for details. Equity investments without readily determinable fair values are carried at cost and are adjusted for any observable price changes or impairments within other gains and losses in the Condensed Consolidated Statements of Income. Investments in debt securities classified as trading are reported at fair value with interest income recorded in interest income in the Condensed Consolidated Statements of Income.
Indemnification Liabilities	Indemnification LiabilitiesThe Company has provided certain indemnifications in connection with its divestitures and has recorded indemnification liabilities equal to the estimated fair value of the obligations upon inception.