Shareholders' Equity - Share Repurchase Programs (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	9 Months Ended
	Jan. 31, 2015	Oct. 31, 2015	Nov. 01, 2014	Mar. 04, 2015
Class of Stock [Line Items]
Stock Repurchased During Period, Value	$ 10,209	$ 201,849	$ 240,462
2015 Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 200,000
Stock Repurchased During Period, Shares		4.4
Stock Repurchased During Period, Value		$ 200,000