Summary of Significant Accounting Policies (Policies)	9 Months Ended
Oct. 31, 2022
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. Certain previously reported amounts have been reclassified to conform to the current year presentation. 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, 2022 ("fiscal 2022"). 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 based on a calendar year. There were no significant intervening events during the month of October 2022 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 has 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.
Redeemable Noncontrolling Interest	Redeemable Noncontrolling Interest Noncontrolling interests that are redeemable outside the Company's control at fixed or determinable prices and dates are presented as temporary equity on the Condensed Consolidated Balance Sheets. Redeemable noncontrolling interests are recorded at the greater of the redemption fair value or the carrying value of the noncontrolling interest and adjusted each reporting period for income, loss and any distributions made. As of October 31, 2022, the Company has a redeemable noncontrolling interest related to an acquisition in the Walmart U.S. segment as the minority interest owner holds a put option which may require the Company to purchase its interest beginning in December 2027 and annually thereafter.
Inventories	Inventories The Company values inventories at the lower of cost or market as determined primarily by the retail inventory method of accounting, using the last-in, first-out ("LIFO") method for the Walmart U.S. segment's inventories. The inventory for the Walmart International segment is generally valued in most markets by the retail inventory method of accounting, using the first-in, first-out ("FIFO") method. The retail inventory method of accounting results in inventory being valued at the lower of cost or market, since permanent markdowns are immediately recorded as a reduction of the carrying value of inventory. The inventory at the Sam's Club segment is valued using the weighted-average cost LIFO method. If necessary, the Company records a LIFO adjustment during interim periods for the projected annual effect of inflation or deflation which is adjusted to actual results based on rates and inventory levels at the end of the year.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In September 2022, the FASB issued ASU 2022-04, Liabilities - Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, which enhances the transparency about the use of supplier finance programs for investors and other allocators of capital. The amendments are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the disclosure of rollforward information, which is effective for fiscal years beginning after December 15, 2023. Early adoption is permitted. The amendments should be applied retrospectively to each period in which a balance sheet is presented, except for disclosure of rollforward information, which should be applied prospectively. Management is currently evaluating this ASU to determine its impact on the Company's disclosures.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Oct. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

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. Certain previously reported amounts have been reclassified to conform to the current year presentation. 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, 2022 ("fiscal 2022"). 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 based on a calendar year. There were no significant intervening events during the month of October 2022 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 has occurred in the fiscal quarter ending January 31.

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.

Redeemable Noncontrolling Interest

Noncontrolling interests that are redeemable outside the Company's control at fixed or determinable prices and dates are presented as temporary equity on the Condensed Consolidated Balance Sheets. Redeemable noncontrolling interests are recorded at the greater of the redemption fair value or the carrying value of the noncontrolling interest and adjusted each reporting period for income, loss and any distributions made. As of October 31, 2022, the Company has a redeemable noncontrolling interest related to an acquisition in the Walmart U.S. segment as the minority interest owner holds a put option which may require the Company to purchase its interest beginning in December 2027 and annually thereafter.

Inventories

The Company values inventories at the lower of cost or market as determined primarily by the retail inventory method of accounting, using the last-in, first-out ("LIFO") method for the Walmart U.S. segment's inventories. The inventory for the Walmart International segment is generally valued in most markets by the retail inventory method of accounting, using the first-in, first-out ("FIFO") method. The retail inventory method of accounting results in inventory being valued at the lower of cost or market, since permanent markdowns are immediately recorded as a reduction of the carrying value of inventory. The inventory at the Sam's Club segment is valued using the weighted-average cost LIFO method. If necessary, the Company records a LIFO adjustment during interim periods for the projected annual effect of inflation or deflation which is adjusted to actual results based on rates and inventory levels at the end of the year.

Recent Accounting Pronouncements

In September 2022, the FASB issued ASU 2022-04, Liabilities - Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, which enhances the transparency about the use of supplier finance programs for investors and other allocators of capital. The amendments are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the disclosure of rollforward information, which is effective for fiscal years beginning after December 15, 2023. Early adoption is permitted. The amendments should be applied retrospectively to each period in which a balance sheet is presented, except for disclosure of rollforward information, which should be applied prospectively. Management is currently evaluating this ASU to determine its impact on the Company's disclosures.