Summary of Significant Accounting Policies (Restricted Cash Reconciliation) (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018		Jul. 29, 2017		Jan. 28, 2017	[1]
Accounting Policies [Abstract]
Cash and cash equivalents	$ 1,386,935	$ 1,290,294		$ 1,150,932
Prepaid expenses and other	8,961	9,412		12,990
Other long-term assets	53,635	53,566		51,848
Total restricted cash and cash equivalents	62,596	62,978		64,838
Total cash, cash equivalents and restricted cash and equivalents	$ 1,449,531	$ 1,353,272	[1]	$ 1,215,770	[1]	$ 1,176,180

[1] As the result of the adoption of ASU 2016-18, Statement of Cash Flow (Topic 230): Restricted Cash, the prior year amounts were retrospectively adjusted to include restricted cash and cash equivalents. See Note A.