Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Oct. 28, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements of The Home Depot, Inc. and its subsidiaries (the "Company," "Home Depot," "we," "our" or "us") have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Results of operations for interim periods are not necessarily indicative of results for the entire year. As a result, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our 2017 Form 10-K. There were no significant changes to our significant accounting policies as disclosed in the 2017 Form 10-K, except as set forth below.
Net Sales	Net Sales We recognize revenue, net of expected returns and sales tax, at the time the customer takes possession of merchandise, or when a service is performed. The liability for sales returns, including the impact to gross profit, is estimated based on historical return levels, and recognized at the transaction price. We also recognize a return asset, and corresponding adjustment to cost of sales, for our right to recover the goods returned by the customer, measured at the former carrying amount of the goods, less any expected recovery cost. At each financial reporting date, we assess our estimates of expected returns, refund liabilities, and return assets. Net sales include services revenue generated through a variety of installation, home maintenance, and professional service programs. In these programs, the customer selects and purchases material for a project, and we provide or arrange for professional installation. These programs are offered through our stores and in-home sales programs. Under certain programs, when we provide or arrange for the installation of a project and the subcontractor provides material as part of the installation, both the material and labor are included in services revenue. We recognize this revenue when the service for the customer is complete, which is not materially different from recognizing the revenue over the service period as the substantial majority of our services are completed within one week. For product sold in stores or online, payment is typically due at the point of sale. For services, payment in full is due upon completion of the job. When we receive payment from customers before the customer has taken possession of the merchandise or the service has been performed, the amount received is recorded as deferred revenue until the sale or service is complete. Such performance obligations are part of contracts with expected original durations of three months or less. We further record deferred revenue for the sale of gift cards and recognize the associated revenue upon the redemption of those gift cards in net sales. Gift card breakage income (estimated non-redeemed gift card balance) is recognized in proportion to the redemption pattern of rights exercised by the customer. For merchandise sold to customers to whom we directly extend credit, collection of tender is typically expected within three months or less from the time of purchase. We also have agreements with third-party service providers who directly extend credit to customers and manage our PLCC program. The deferred interest charges we incur for our deferred financing programs offered to these customers, interchange fees charged to us for their use of the cards, and any profit sharing with the third-party service providers are included in net sales.
Cost of Sales	Cost of Sales Cost of sales includes the actual cost of merchandise sold and services performed; the cost of transportation of merchandise from vendors to our distribution network, stores, or customers; shipping and handling costs from our stores or distribution network to customers; and the operating cost and depreciation of our sourcing and distribution network and online fulfillment centers.