SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
Oct. 28, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	(b) Basis of Presentation The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") for interim financial information, including the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, certain information and note disclosures normally required in complete financial statements prepared in conformity with accounting principles generally accepted in the United States have been condensed or omitted. In the Company’s opinion, these condensed consolidated financial statements include all adjustments necessary for a fair presentation of the financial position, results of operations and cash flows for the interim periods presented. The results of operations for interim periods, however, may not be indicative of the results that may be expected for a full year. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended July 29, 2017. Net sales consist primarily of sales of natural, organic and specialty products to retailers, adjusted for customer volume discounts, returns, and allowances. Net sales also include amounts charged by the Company to customers for shipping and handling and fuel surcharges. The principal components of cost of sales include the amounts paid to suppliers for product sold, plus the cost of transportation necessary to bring the product to the Company’s distribution facilities, offset by consideration received from suppliers in connection with the purchase or promotion of the suppliers' products. Cost of sales also includes amounts incurred by the Company’s manufacturing subsidiary, United Natural Trading LLC, which does business as Woodstock Farms Manufacturing, for inbound transportation costs offset by consideration received from suppliers in connection with the purchase or promotion of the suppliers’ products. Operating expenses include salaries and wages, employee benefits, warehousing and delivery, selling, occupancy, insurance, administrative, share-based compensation and amortization expense. Operating expenses also include depreciation expense related to the wholesale and retail divisions. Other expense (income) includes interest on outstanding indebtedness, including the financing obligation related to our Aurora, Colorado distribution center and the lease for office space for our corporate headquarters in Providence, Rhode Island, interest income and miscellaneous income and expenses. As noted above, the Company includes shipping and handling fees billed to customers in net sales. Shipping and handling costs associated with inbound freight are generally recorded in cost of sales, whereas shipping and handling costs for selecting, quality assurance, and outbound transportation are recorded in operating expenses. Outbound shipping and handling costs, including allocated employee benefit expenses, totaled $138.0 million and $126.9 million for the first quarter of fiscal 2018 and 2017, respectively.

(b) Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") for interim financial information, including the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, certain information and note disclosures normally required in complete financial statements prepared in conformity with accounting principles generally accepted in the United States have been condensed or omitted. In the Company’s opinion, these condensed consolidated financial statements include all adjustments necessary for a fair presentation of the financial position, results of operations and cash flows for the interim periods presented. The results of operations for interim periods, however, may not be indicative of the results that may be expected for a full year. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended July 29, 2017.

Net sales consist primarily of sales of natural, organic and specialty products to retailers, adjusted for customer volume discounts, returns, and allowances. Net sales also include amounts charged by the Company to customers for shipping and handling and fuel surcharges. The principal components of cost of sales include the amounts paid to suppliers for product sold, plus the cost of transportation necessary to bring the product to the Company’s distribution facilities, offset by consideration received from suppliers in connection with the purchase or promotion of the suppliers' products. Cost of sales also includes amounts incurred by the Company’s manufacturing subsidiary, United Natural Trading LLC, which does business as Woodstock Farms Manufacturing, for inbound transportation costs offset by consideration received from suppliers in connection with the purchase or promotion of the suppliers’ products. Operating expenses include salaries and wages, employee benefits, warehousing and delivery, selling, occupancy, insurance, administrative, share-based compensation and amortization expense. Operating expenses also include depreciation expense related to the wholesale and retail divisions. Other expense (income) includes interest on outstanding indebtedness, including the financing obligation related to our Aurora, Colorado distribution center and the lease for office space for our corporate headquarters in Providence, Rhode Island, interest income and miscellaneous income and expenses.

As noted above, the Company includes shipping and handling fees billed to customers in net sales. Shipping and handling costs associated with inbound freight are generally recorded in cost of sales, whereas shipping and handling costs for selecting, quality assurance, and outbound transportation are recorded in operating expenses. Outbound shipping and handling costs, including allocated employee benefit expenses, totaled $138.0 million and $126.9 million for the first quarter of fiscal 2018 and 2017, respectively.