Related-Party Transactions (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 28, 2017	Jan. 27, 2017
Management Services Agreements | Maximum
Related-Party Transactions
Reimbursement of expenses by entity and its parent to affiliates of the sponsors	$ 0.1
Ares and CPPIB | First Lien Term Loan Facility
Related-Party Transactions
Debt owned by affiliate	129.8	$ 130.5
Ares and CPPIB | Senior Notes
Related-Party Transactions
Debt owned by affiliate	$ 102.1	$ 102.1