Commitments and Contingencies - Litigation (Details) SFr in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2016 USD ($)	Jan. 31, 2015 USD ($)	Jan. 31, 2014 USD ($)	Jan. 31, 2014 CHF (SFr)	Jan. 31, 2016 CHF (SFr)
Loss Contingencies [Line Items]
Loss Contingency, Damages Paid, Value | SFr				SFr 402.7
Branded Watch Sales As Percentage Of Net Sales			1.00%	1.00%
Arbitration award expense | $	$ 0.0	$ 0.0	$ 480.2
Swatch Parties [Member]
Loss Contingencies [Line Items]
Minimum Damage Claim Sought By Third Party	72.0				SFr 73.0
Maximum Damage Claim Sought By Third Party	3,700.0				3,800.0
Tiffany Parties [Member]
Loss Contingencies [Line Items]
Minimum Damage Claim Sought	118.0				120.0
Maximum Damage Claim Sought	$ 533.0				SFr 540.0