The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

+ Details

Name:	us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

+ Details

Name:	us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_NonoperatingIncomeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount before tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109978405&loc=d3e80720-113993

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580

+ Details

Name:	us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.9)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=tif_InterestExpenseandFinancingCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OtherNonoperatingIncomeExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OtherComprehensiveIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=tif_PreciousmetalcollarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=tif_PreciousMetalForwardContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CurrencySwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Hedging Instruments - Information on Location and Amounts of Derivative Gains and Losses in Consolidated Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Cost of sales	$ 388.9	$ 383.1	$ 1,163.4	$ 1,152.5
Interest expense and financing costs	9.2	10.1	29.4	29.7
Other expense, net	4.2	1.8	2.2	5.1
Other comprehensive earnings (loss), net of tax	14.0	(21.0)	7.8	(81.5)
Net pre-tax derivative gains to be reclassified within twelve months			3.0
Cash Flow Hedging \| Foreign Exchange Forward \| Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	(1.0)		(3.5)
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.1		(2.2)
Cash Flow Hedging \| Foreign Exchange Forward \| Interest expense and financing costs
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Foreign Exchange Forward \| Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Foreign Exchange Forward \| Other comprehensive earnings (loss), net of tax
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	1.4		4.5
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	1.0		3.5
Pre-tax gain (loss) recognized in OCI		4.3		10.6
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		(0.1)		2.2
Cash Flow Hedging \| Precious Metal Collars \| Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	(0.1)		(0.3)
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		(0.2)		(0.4)
Cash Flow Hedging \| Precious Metal Collars \| Interest expense and financing costs
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Precious Metal Collars \| Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Precious Metal Collars \| Other comprehensive earnings (loss), net of tax
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.1		0.3
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.2		0.4
Cash Flow Hedging \| Precious Metal Forward Contracts \| Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.6		2.8
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.6		0.1
Cash Flow Hedging \| Precious Metal Forward Contracts \| Interest expense and financing costs
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Precious Metal Forward Contracts \| Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Precious Metal Forward Contracts \| Other comprehensive earnings (loss), net of tax
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	3.8		10.4
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	(0.6)		(2.8)
Pre-tax gain (loss) recognized in OCI		(1.4)		(13.5)
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		(0.6)		(0.1)
Cash Flow Hedging \| Currency Swap \| Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Currency Swap \| Interest expense and financing costs
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	(1.5)		(4.6)
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Currency Swap \| Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	(1.0)		(0.2)
Pre-tax gain (loss) recognized in OCI		0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		(4.2)		(9.3)
Cash Flow Hedging \| Currency Swap \| Other comprehensive earnings (loss), net of tax
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in OCI	9.2		21.7
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	2.5		4.8
Pre-tax gain (loss) recognized in OCI		2.8		5.7
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		4.2		9.3
Cash Flow Hedging \| Interest Rate Swap \| Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Interest Rate Swap \| Interest expense and financing costs
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.3		1.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.3		1.0
Cash Flow Hedging \| Interest Rate Swap \| Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	0.0		0.0
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		0.0		0.0
Cash Flow Hedging \| Interest Rate Swap \| Other comprehensive earnings (loss), net of tax
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) reclassified from accumulated OCI into earnings	$ (0.3)		$ (1.0)
Pre-tax gain (loss) reclassified from accumulated OCI into earnings		$ (0.3)		$ (1.0)