Debt Letters of Credit (Details) $ in Millions	Jan. 31, 2018 USD ($)
Letters of Credit Disclosure [Abstract]
Available Letters Of Credit And Financial Guarantees	$ 81.2
Letters Of Credit And Financial Guarantees Outstanding	22.6
Letters Of Credit And Financial Guarantees Current	$ 60.1

Letters Of Credit And Financial Guarantees Outstanding

No definition available.

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