Business Acquisition, Purchase Price Allocation, Intangible Assets Amount

No definition available.

Name:	tdy_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsAmount
Namespace Prefix:	tdy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

+ Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=tdy_RoperTechnologiesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=tdy_A3MGasAndFlameDetectionBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=tdy_MicralyneIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=tdy_AcquisitionsIn2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Business Acquisitions, Goodwill and Acquired Intangible Assets (Purchase Price) (Details) - USD ($) $ in Millions				12 Months Ended
	Aug. 30, 2019	Aug. 01, 2019	Feb. 05, 2019	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill				$ 2,050.5	$ 1,735.2	$ 1,776.7
Roper Technologies, Inc
Business Acquisition [Line Items]
Cash paid			$ 224.8	224.8
Goodwill				149.9
Acquired Intangible Assets				52.4
3M Gas And Flame Detection Business
Business Acquisition [Line Items]
Cash paid		$ 233.5		233.5
Goodwill				147.7
Acquired Intangible Assets				69.0
Micralyne Inc
Business Acquisition [Line Items]
Cash paid	$ 25.7			25.7
Goodwill				7.3
Acquired Intangible Assets				0.9
Acquisitions In 2019
Business Acquisition [Line Items]
Cash paid				484.0
Goodwill				304.9
Acquired Intangible Assets				$ 122.3