Summary of Significant Accounting Policies (Policies)	3 Months Ended
Apr. 29, 2023
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation. The accompanying unaudited interim condensed consolidated financial statements have been prepared from the records of Ross Stores, Inc. and subsidiaries (the “Company”) without audit and, in the opinion of management, include all adjustments (consisting of only normal, recurring adjustments) necessary to present fairly the Company’s financial position as of April 29, 2023 and April 30, 2022, and the results of operations, comprehensive income, stockholders’ equity, and cash flows for the three month periods ended April 29, 2023 and April 30, 2022. The Condensed Consolidated Balance Sheet as of January 28, 2023, presented herein, has been derived from the Company’s audited consolidated financial statements for the fiscal year then ended. Certain information and disclosures normally included in the notes to annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted for purposes of these interim condensed consolidated financial statements. The interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, including notes thereto, contained in the Company’s Annual Report on Form 10-K for the year ended January 28, 2023. The results of operations, comprehensive income, stockholders’ equity, and cash flows for the three month periods ended April 29, 2023 and April 30, 2022 presented herein are not necessarily indicative of the results to be expected for the full fiscal year. The fiscal year ending February 3, 2024 is referred to as fiscal 2023 and is a 53-week year. The fiscal year ended January 28, 2023 is referred to as fiscal 2022 and was a 52-week year.
Recently adopted accounting standards	Recently adopted accounting standards. In September 2022, the FASB issued Accounting Standards Update (ASU) 2022-04, Liabilities — Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, to enhance transparency about an entity’s use of supplier finance programs. The ASU requires enhanced and additional disclosures about the key terms of supplier finance programs including a description of where in the financial statements any related amounts are presented. The Company adopted ASU 2022-04 in the first quarter of fiscal 2023 on a retrospective basis, excluding the rollforward requirements which will be adopted in fiscal 2024 on a prospective basis. The adoption of this standard did not have a material impact on the Company’s fiscal 2023 results.
Use of accounting estimates	Use of accounting estimates. The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets, liabilities, and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. The Company’s significant accounting estimates include valuation reserves for inventory, packaway and other inventory carrying costs, useful lives of fixed assets, insurance reserves, reserves for uncertain tax positions, and legal claims. The uncertainties and potential impacts from macroeconomic factors, such as inflation, increase the challenge of making these estimates; actual results could differ materially from the Company’s estimates.
Cash and cash equivalents and Restricted cash and cash equivalents	Cash and cash equivalents. Cash equivalents consist of highly liquid, fixed income instruments purchased with an original maturity of three months or less. The institutions where these instruments are held could potentially subject the Company to concentrations of credit risk. The Company manages its risk associated with these instruments primarily by holding its cash and cash equivalents across a highly diversified set of banks and other financial institutions.Restricted cash and cash equivalents. Restricted cash and cash equivalents serve as collateral for certain insurance obligations. These restricted funds are invested in bank deposits, money market funds, and U.S. Government and agency securities and cannot be withdrawn from the Company’s account without the prior written consent of the secured parties. The classification between current and long-term is based on the timing of expected payments of the obligations.
Property and equipment	Property and equipment. As of April 29, 2023 and April 30, 2022, the Company had $46.4 million and $19.0 million, respectively, of property and equipment purchased but not yet paid. These purchases are included in Property and equipment, Accounts payable, and Accrued expenses and other in the accompanying Condensed Consolidated Balance Sheets.
Supply chain finance program	Supply chain finance program. The Company facilitates a voluntary supply chain finance program (the “program”) to provide certain suppliers with the opportunity to sell receivables due from the Company to participating financial institutions at the sole discretion of both the suppliers and the financial institutions. A third-party bank administers the program. The Company’s responsibility is limited to making payment on the terms originally negotiated with each supplier, regardless of whether a supplier sells its receivable to a financial institution. The Company is not a party to the agreements between the participating financial institutions and the suppliers in connection with the program and receives no financial incentives from the suppliers or the financial institutions. No guarantees are provided by the Company under the program and the Company’s rights and obligations to its suppliers are not impacted by the program. The range of payment terms negotiated with a supplier is consistent, irrespective of whether a supplier participates in the program.All outstanding payments owed under the program are recorded within Accounts payable in the Consolidated Balance Sheets. The Company accounts for all payments made under the program as a reduction to operating cash flows in Accounts payable within the Consolidated Statements of Cash Flows.
Fair Value Measurements	Fair Value MeasurementsAccounting standards pertaining to fair value measurements establish a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value. The inputs used to measure fair value include: Level 1, observable inputs such as quoted prices in active markets; Level 2, inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, unobservable inputs in which little or no market data exists. This fair value hierarchy requires the Company to develop its own assumptions, maximize the use of observable inputs, and minimize the use of unobservable inputs when measuring fair value. Corporate, U.S. government and agency, and mortgage-backed securities are classified within Level 1 or Level 2 because these securities are valued using quoted market prices or alternative pricing sources and models utilizing market observable inputs.
Earnings Per Share	Earnings Per ShareThe Company computes and reports both basic earnings per share (“EPS”) and diluted EPS. Basic EPS is computed by dividing net earnings by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed by dividing net earnings by the sum of the weighted-average number of common shares and dilutive common stock equivalents outstanding during the period. Diluted EPS reflects the total potential dilution that could occur from outstanding equity plan awards and unvested shares of both performance and non-performance based awards of restricted stock and restricted stock units.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Apr. 29, 2023

Basis of presentation. The accompanying unaudited interim condensed consolidated financial statements have been prepared from the records of Ross Stores, Inc. and subsidiaries (the “Company”) without audit and, in the opinion of management, include all adjustments (consisting of only normal, recurring adjustments) necessary to present fairly the Company’s financial position as of April 29, 2023 and April 30, 2022, and the results of operations, comprehensive income, stockholders’ equity, and cash flows for the three month periods ended April 29, 2023 and April 30, 2022. The Condensed Consolidated Balance Sheet as of January 28, 2023, presented herein, has been derived from the Company’s audited consolidated financial statements for the fiscal year then ended.

Certain information and disclosures normally included in the notes to annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted for purposes of these interim condensed consolidated financial statements. The interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, including notes thereto, contained in the Company’s Annual Report on Form 10-K for the year ended January 28, 2023.

The results of operations, comprehensive income, stockholders’ equity, and cash flows for the three month periods ended April 29, 2023 and April 30, 2022 presented herein are not necessarily indicative of the results to be expected for the full fiscal year. The fiscal year ending February 3, 2024 is referred to as fiscal 2023 and is a 53-week year. The fiscal year ended January 28, 2023 is referred to as fiscal 2022 and was a 52-week year.

Recently adopted accounting standards

Recently adopted accounting standards. In September 2022, the FASB issued Accounting Standards Update (ASU) 2022-04, Liabilities — Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, to enhance transparency about an entity’s use of supplier finance programs. The ASU requires enhanced and additional disclosures about the key terms of supplier finance programs including a description of where in the financial statements any related amounts are presented. The Company adopted ASU 2022-04 in the first quarter of fiscal 2023 on a retrospective basis, excluding the rollforward requirements which will be adopted in fiscal 2024 on a prospective basis. The adoption of this standard did not have a material impact on the Company’s fiscal 2023 results.

Use of accounting estimates

Use of accounting estimates. The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets, liabilities, and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. The Company’s significant accounting estimates include valuation reserves for inventory, packaway and other inventory carrying costs, useful lives of fixed assets, insurance reserves, reserves for uncertain tax positions, and legal claims. The uncertainties and potential impacts from macroeconomic factors, such as inflation, increase the challenge of making these estimates; actual results could differ materially from the Company’s estimates.

Cash and cash equivalents and Restricted cash and cash equivalents

Cash and cash equivalents. Cash equivalents consist of highly liquid, fixed income instruments purchased with an original maturity of three months or less. The institutions where these instruments are held could potentially subject the Company to concentrations of credit risk. The Company manages its risk associated with these instruments primarily by holding its cash and cash equivalents across a highly diversified set of banks and other financial institutions.Restricted cash and cash equivalents. Restricted cash and cash equivalents serve as collateral for certain insurance obligations. These restricted funds are invested in bank deposits, money market funds, and U.S. Government and agency securities and cannot be withdrawn from the Company’s account without the prior written consent of the secured parties. The classification between current and long-term is based on the timing of expected payments of the obligations.

Property and equipment

Property and equipment. As of April 29, 2023 and April 30, 2022, the Company had $46.4 million and $19.0 million, respectively, of property and equipment purchased but not yet paid. These purchases are included in Property and equipment, Accounts payable, and Accrued expenses and other in the accompanying Condensed Consolidated Balance Sheets.

Supply chain finance program

Supply chain finance program. The Company facilitates a voluntary supply chain finance program (the “program”) to provide certain suppliers with the opportunity to sell receivables due from the Company to participating financial institutions at the sole discretion of both the suppliers and the financial institutions. A third-party bank administers the program. The Company’s responsibility is limited to making payment on the terms originally negotiated with each supplier, regardless of whether a supplier sells its receivable to a financial institution. The Company is not a party to the agreements between the participating financial institutions and the suppliers in connection with the program and receives no financial incentives from the suppliers or the financial institutions. No guarantees are provided by the Company under the program and the Company’s rights and obligations to its suppliers are not impacted by the program. The range of payment terms negotiated with a supplier is consistent, irrespective of whether a supplier participates in the program.All outstanding payments owed under the program are recorded within Accounts payable in the Consolidated Balance Sheets. The Company accounts for all payments made under the program as a reduction to operating cash flows in Accounts payable within the Consolidated Statements of Cash Flows.

Fair Value Measurements

Fair Value MeasurementsAccounting standards pertaining to fair value measurements establish a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value. The inputs used to measure fair value include: Level 1, observable inputs such as quoted prices in active markets; Level 2, inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, unobservable inputs in which little or no market data exists. This fair value hierarchy requires the Company to develop its own assumptions, maximize the use of observable inputs, and minimize the use of unobservable inputs when measuring fair value. Corporate, U.S. government and agency, and mortgage-backed securities are classified within Level 1 or Level 2 because these securities are valued using quoted market prices or alternative pricing sources and models utilizing market observable inputs.

Earnings Per Share

Earnings Per ShareThe Company computes and reports both basic earnings per share (“EPS”) and diluted EPS. Basic EPS is computed by dividing net earnings by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed by dividing net earnings by the sum of the weighted-average number of common shares and dilutive common stock equivalents outstanding during the period. Diluted EPS reflects the total potential dilution that could occur from outstanding equity plan awards and unvested shares of both performance and non-performance based awards of restricted stock and restricted stock units.