Accounts Receivable, Net - Portfolio of Accounts Receivable (Details) - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 1,858.0	$ 1,756.4
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	1,813.3	1,725.9	$ 1,552.9
Other accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	11.3	16.9
Sterling Jewelers | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	1,813.3	1,725.9
Zale Jewelry | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 33.4	$ 13.6