Commitments and Contingencies - Litigation (Detail)	12 Months Ended
	Jan. 31, 2015 USD ($)	Jan. 31, 2014 USD ($)	Jan. 31, 2014 CHF	Jan. 31, 2013 USD ($)	Jan. 31, 2015 Swatch Parties [Member] USD ($)	Jan. 31, 2015 Swatch Parties [Member] CHF	Jan. 31, 2015 Tiffany Parties [Member] USD ($)	Jan. 31, 2015 Tiffany Parties [Member] CHF
Loss Contingencies [Line Items]
Minimum Damage Claim Sought							$ 130,000,000	120,000,000
Maximum Damage Claim Sought							584,000,000	540,000,000
Minimum Damage Claim Sought By Third Party					79,000,000	73,000,000
Maximum Damage Claim Sought By Third Party					4,100,000,000	3,800,000,000
Loss Contingency, Damages Paid, Value			402,737,000
Branded Watch Sales As Percentage Of Net Sales		1.00%	1.00%	1.00%
Arbitration award expense	$ 0	$ 480,211,000		$ 0