Assets Held-For-Sale and Discontinued Operations - Additional Information (Details)		3 Months Ended			12 Months Ended
	Jan. 17, 2019 USD ($)	Feb. 02, 2019 USD ($) Number	Feb. 03, 2018 USD ($)	Feb. 03, 2018 USD ($)	Feb. 02, 2019 USD ($) Number	Feb. 03, 2018 USD ($)	Oct. 23, 2018 USD ($) Number
Indefinite Lived Intangible Assets By Major Class [Line Items]
Income (loss) from discontinued operations, net of tax					$ (124,216,000)	$ 5,646,000
Goodwill impairment charge				$ 87,000	0
Proceeds from asset dispositions					2,203,000	2,206,000
Inventory		$ 246,517,000	$ 263,831,000	263,831,000	246,517,000	263,831,000
Gain (loss) on sale of assets					$ 145,300,000
Number of pharmacy | Number		169			169
Cash proceeds	$ 156,100,000
Proceeds from sale of inventory	20,600,000
Entrust [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Gain (loss) on sale of assets					$ (400,000)
Retail Pharmacy Discontinued Operations [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Income (loss) from discontinued operations, net of tax					(135,752,000)	(5,272,000)
Gain (loss) on sale of assets	145,700,000				145,746,000
Asset Purchase Agreement [Member] | Advance Care Scripts, Inc. [Member] | Entrust [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Proceeds from asset dispositions					40,000,000
Asset Purchase Agreement [Member] | Advance Care Scripts, Inc. [Member] | Entrust [Member] | Maximum
Indefinite Lived Intangible Assets By Major Class [Line Items]
Inventory		$ 5,500,000			5,500,000
Amended WBA Asset Purchase Agreement [Member] | Walgreen Co., an Illinois corporation [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Inventory	20,600,000
Number of retail pharmacy sold | Number							179
Number of pharmacy | Number							346
Total purchase consideration	$ 156,100,000						$ 157,000,000
Amended WBA Asset Purchase Agreement [Member] | Maximum | Walgreen Co., an Illinois corporation [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Inventory							$ 35,000,000
Pharmacy Department [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Income (loss) from discontinued operations, net of tax						11,500,000
Goodwill impairment charge		1,500				10,800,000
Inventory		$ 13,200,000	11,500,000	$ 11,500,000	13,200,000	$ 11,500,000
Gain (loss) on sale of assets					$ (400,000)
Trade Name [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment charge			600,000
Goodwill [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment charge			$ 10,800,000