Commitments and Contingencies Contractual Cash Obligations and Contingent Funding Commitments (Details) $ in Millions	12 Months Ended
Jan. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Inventory Purchase Commitments Including Diamond Purchase Commitments Amount Committed	$ 268.4
Diamond Purchase Commitments Amount Committed	45.0
Other Contractual Obligations	$ 86.6

The estimated amount as of the balance sheet date that the entity must expend to satisfy the terms of other commitments and purchase obligation arrangements in which the entity has agreed to expend funds to satisfy technology licensing and service contracts, fixed royalty commitments, construction-in-progress projects, and packaging supplies.

No definition available.

Name:	tif_OtherContractualObligations
Namespace Prefix:	tif_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant