Teledyne Technologies (TDY) 10-Q 29 Apr 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 24, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	TELEDYNE TECHNOLOGIES INC
Entity Central Index Key	0001094285
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-29
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		36,236,354

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Statement [Abstract]
Net sales	$ 745.2	$ 695.6
Costs and expenses
Cost of sales	463.9	438.2
Selling, general and administrative expenses	184	169
Total costs and expenses	647.9	607.2
Operating income	97.3	88.4
Interest and debt expense, net	(5.4)	(7.1)
Non-service retirement benefit income	2.2	3.4
Other expense, net	(1.2)	(2.5)
Income before income taxes	92.9	82.2
Provision for income taxes	17.6	15.7
Net income	$ 75.3	$ 66.5
Basic earnings per common share:
Basic earnings per common share (in USD per share)	$ 2.09	$ 1.87
Weighted average basic common shares outstanding (in shares)	36.1	35.6
Diluted earnings per common share:
Diluted earnings per common share (in USD per share)	$ 2.02	$ 1.81
Weighted average diluted common shares outstanding (in shares)	37.2	36.8

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Current Assets
Cash	$ 106.2	$ 142.5
Accounts receivable, net	410.4	416.5
Unbilled receivables, net	154	145.3
Inventories, net	393	364.3
Prepaid expenses and other current assets	53.9	45.8
Total current assets	1,117.5	1,114.4
Property, plant and equipment, net of accumulated depreciation and amortization of $579.6 at March 31, 2019 and $566.0 at December 30, 2018	450.7	442.6
Goodwill	1,885.1	1,735.2
Acquired intangibles, net	389	344.3
Prepaid pension assets	94.8	88.2
Operating lease right-of-use assets	134.3
Other assets, net	90.3	84.6
Total Assets	4,161.7	3,809.3
Current Liabilities
Accounts payable	227.3	227.8
Accrued liabilities	364.6	355.6
Current portion of long-term debt and other debt	131.8	137.4
Total current liabilities	723.7	720.8
Long-term debt	724.6	610.1
Long-term operating lease liabilities	126
Other long-term liabilities	237.9	248.7
Total Liabilities	1,812.2	1,579.6
Commitments and contingencies
Stockholders’ Equity
Preferred stock, $0.01 par value; outstanding shares - none	0	0
Common stock, $0.01 par value; authorized 125,000,000 shares; issued shares: 37,697,865 at March 31, 2019 and December 30, 2018; outstanding shares: 36,232,598 at March 31, 2019 and 36,087,297 at December 30, 2018	0.4	0.4
Additional paid-in capital	349.8	343.7
Retained earnings	2,599	2,523.7
Treasury stock, 1,465,267 shares at March 31, 2019 and 1,610,568 shares at December 30, 2018	(129.9)	(144.9)
Accumulated other comprehensive loss	(469.8)	(493.2)
Total Stockholders’ Equity	2,349.5	2,229.7
Total Liabilities and Stockholders’ Equity	$ 4,161.7	$ 3,809.3

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 75.3	$ 66.5
Other comprehensive income (loss):
Foreign exchange translation adjustment	17	17.2
Hedge activity, net of tax	1.8	(1.6)
Pension and postretirement benefit adjustments, net of tax	4.6	4.3
Other comprehensive income	23.4	19.9
Comprehensive income	$ 98.7	$ 86.4

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Statement of Financial Position [Abstract]
Accumulated depreciation and amortization	$ 579.6	$ 566
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	125,000,000	125,000,000
Common stock, shares, issued (in shares)	37,697,865	37,697,865
Common stock, shares outstanding (in shares)	36,232,598	36,087,297
Treasury stock (in shares)	1,465,267	1,610,568

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017	$ 1,947.3	$ 0.4	$ 337.3	$ (200.7)	$ 2,139.6	$ (329.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	66.5				66.5
Other comprehensive loss, net of tax	19.9					19.9
Treasury stock issued	0		(20.4)	20.4
Stock-based compensation	6.6		6.6
Exercise of stock options and other	12.3		12.3
Ending balance at Apr. 01, 2018	2,055.9	0.4	335.8	(180.3)	2,257	(357)
Beginning balance at Dec. 30, 2018	2,229.7	0.4	343.7	(144.9)	2,523.7	(493.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	75.3				75.3
Other comprehensive loss, net of tax	23.4					23.4
Treasury stock issued	0		(15)	15
Stock-based compensation	10.9		10.9
Exercise of stock options and other	10.2		10.2
Ending balance at Mar. 31, 2019	$ 2,349.5	$ 0.4	$ 349.8	$ (129.9)	$ 2,599	$ (469.8)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Operating Activities
Net income	$ 75.3	$ 66.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	27.6	28.8
Stock-based compensation	10.8	6.5
Changes in operating assets and liabilities:
Accounts receivable	6.7	(27)
Inventories	(12.4)	(6)
Prepaid expenses and other assets	(10)	(3.6)
Accounts payable	(1.1)	9.7
Accrued liabilities	(15.1)	(9)
Deferred and income taxes receivable/payable, net	(2.8)	10.9
Long-term assets	(13.4)	(8.8)
Other long-term liabilities	16.2	0.1
Other operating, net	(1.7)	3.5
Net cash provided by operating activities	80.1	71.6
Investing Activities
Purchases of property, plant and equipment	(21.3)	(19.8)
Purchase of businesses, net of cash acquired	(222.5)
Proceeds from the sale of assets	0	0.2
Net cash used in investing activities	(243.8)	(19.6)
Financing Activities
Net proceeds from (payments on) credit facility	120
Net proceeds from (payments on) credit facility		(54.5)
Proceeds from (payments on) other debt, net	(5.9)
Proceeds from (payments on) other debt, net		1.6
Proceeds from exercise of stock options	10.2	12.3
Other financing, net		(2)
Net cash provided by (used in) financing activities	124.3	(42.6)
Effect of exchange rate changes on cash	3.1	(0.4)
Change in cash	(36.3)	9
Cash—beginning of period	142.5	70.9
Cash—end of period	$ 106.2	$ 79.9

General

General	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared by Teledyne Technologies Incorporated (“Teledyne” or the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and disclosures normally included in notes to consolidated financial statements have been condensed or omitted pursuant to such rules and regulations, but resultant disclosures are in accordance with accounting principles generally accepted in the United States (“GAAP”) as they apply to interim reporting. The condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the related notes in Teledyne’s Annual Report on Form 10-K for the fiscal year ended December 30, 2018 (“ 2018 Form 10-K”). In the opinion of Teledyne’s management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, Teledyne’s consolidated financial position as of March 31, 2019 and the consolidated results of operations, consolidated comprehensive income and consolidated cash flows for the three months then ended. The results of operations and cash flows for the three months ended March 31, 2019 are not necessarily indicative of the results of operations or cash flows to be expected for any subsequent quarter or the full fiscal year. Certain prior year amounts have been reclassified to conform to the current period presentation. In the second quarter of 2018, we realigned the reporting structure for certain of our microwave product groupings. These products, acquired with the acquisition of e2v technologies plc (“e2v”) were formerly reported as part of the Aerospace and Defense Electronics segment and are now reported as part of the Digital Imaging segment. Previously reported segment data has been adjusted to reflect this change. Recent Accounting Pronouncements In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-02, “Income Statement-Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, to address a specific consequence of the Tax Cuts and Jobs Act (“Tax Act”) by allowing a reclassification from accumulated other comprehensive income (“AOCI”) to retained earnings for stranded tax effects resulting from the Tax Act reduction of the U.S. federal corporate income tax rate. The guidance is effective for all entities for annual periods beginning after December 15, 2018, with early adoption permitted. In 2018, we elected to early adopt this ASU and elected to reclassify, in the period of enactment, stranded tax effects totaling $47.6 million from AOCI to retained earnings in our condensed consolidated balance sheet. The reclassification amount primarily included income tax effects related to our pension and postretirement benefit plans. Income tax effects remaining in AOCI will be released into earnings as the related pretax amounts are reclassified to earnings. In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815) Targeted Improvements to Accounting for Hedging Activities.” This new guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships and expands and refines hedge accounting for both nonfinancial and financial risk components. This new guidance also simplifies and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This new guidance is effective for fiscal years beginning after December 15, 2018 and for interim periods therein, with early adoption permitted. We adopted the new guidance as of December 31, 2018 using the modified retrospective approach, there was no cumulative adjustment to retained earnings related to hedge ineffectiveness for the year ended December 31, 2018. Additionally, as a result of the adoption, we no longer disclose the ineffective portion of the change in fair value of our derivative financial instruments. The entire change in the fair value of the cash flow hedging instruments aside from components excluded from the assessment of hedge effectiveness will now be recorded in other comprehensive income and subsequently reclassified to earnings in the period the hedged item impacts earnings. The adoption of this standard did not have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment, which eliminates the computation of the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record a goodwill impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We expect the adoption of this guidance will reduce the complexity surrounding the evaluation of goodwill for impairment. The impact of this new guidance for the Company will depend on the outcomes of future goodwill impairment tests. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The new guidance requires lessees to recognize most leases on their balance sheet as a right-of-use asset and a lease liability, other than leases that meet the definition of a short-term lease. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. We adopted the new guidance on December 31, 2018, the beginning of our 2019 fiscal year using the modified retrospective transition method. Prior period comparative information was not adjusted. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification. The adoption of this guidance did not have a material impact related to existing leases and as a result, a cumulative-effect adjustment was not recorded. Also, the adoption of the new guidance did not have a material impact on our results of operations or cash flows. Lease Commitments We determine if an arrangement is a lease at inception. Effective December 31, 2018, operating leases are recorded as right-of-use assets, other long-term lease liabilities and current accrued liabilities in our condensed consolidated balance sheets. Finance leases are included in property and equipment, other current liabilities, and other long-term liabilities in our condensed consolidated balance sheets. Operating lease right-of-use assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease right-of-use assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Since most of our leases do not provide an implicit rate, we use our incremental borrowing rate to determine the present value of lease payments at the commencement date. We use the implicit rate when readily determinable. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Many lease agreements contain renewal options at either a fixed cost, fixed increase or market value adjustment. For those leases with renewal options, we will include the renewal options that are reasonably certain to be exercised, for purposes of calculating the lease liability and corresponding right of use asset. Teledyne will evaluate the likelihood of exercising each renewal option based on many factors, including the length of the renewal option and the future new lease cost, if known, or the estimated future new lease cost if it is not a fixed amount. Operating Leases Teledyne has approximately 120 operating lease agreements, which are primarily for manufacturing facilities and office space. These agreements frequently include one or more renewal options and require the Company to pay for utilities, taxes, insurance and maintenance expense. No lease agreement imposes a restriction on the Company’s ability to engage in financing transactions or enter into further lease agreements. At March 31, 2019, Teledyne has right-of-use assets of $134.3 million and a total lease liability for operating leases of $144.0 million of which $126.0 million is included in long-term lease liabilities and $18.0 million is included in current accrued liabilities. At March 31, 2019, future minimum lease payments for operating leases with non-cancelable terms of more than one year were as follows (in millions): Remainder of 2019 $ 22.5 2020 21.0 2021 19.3 2022 16.9 2023 15.6 Thereafter 79.9 Total minimum lease payments 175.2 Less: Imputed interest (31.2 ) Current portion (18.0 ) Present value of minimum lease payments, net of current portion $ 126.0 The weighted average remaining lease term for operating leases is approximately 10 years and the weighted average discount rate is 4.09% . Operating lease expense was $5.8 million for the first quarter of 2019. As previously disclosed in Note 13 of the Notes to Consolidated Financial Statements included in our 2018 Form 10-K and under the previous lease accounting, future minimum lease payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year were as follows (in millions): As of December 30, 2018 2019 $ 23.2 2020 20.6 2021 18.4 2022 18.4 2023 11.8 Thereafter 48.2 Total minimum lease payments $ 140.6 Other Our finance leases and subleases are not material.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The changes in AOCI by component, net of tax, for the first quarter ended March 31, 2019 and April 1, 2018 are as follows (in millions): Foreign Currency Translation Cash Flow Hedges and Other Pension and Postretirement Benefits Total Balance as of December 30, 2018 $ (181.5 ) $ (4.9 ) $ (306.8 ) $ (493.2 ) Other comprehensive income before reclassifications 17.0 3.3 — 20.3 Amounts reclassified from AOCI — (1.5 ) 4.6 3.1 Net other comprehensive income 17.0 1.8 4.6 23.4 Balance as of March 31, 2019 $ (164.5 ) $ (3.1 ) $ (302.2 ) $ (469.8 ) Foreign Currency Translation Cash Flow Hedges and Other Pension and Postretirement Benefits Total Balance as of December 31, 2017 $ (102.0 ) $ 0.5 $ (227.8 ) $ (329.3 ) Other comprehensive income/(loss) before reclassifications 17.2 (2.7 ) — 14.5 Amounts reclassified from AOCI — 1.1 4.3 5.4 Net other comprehensive income/(loss) 17.2 (1.6 ) 4.3 19.9 Reclassification of income tax effects for ASU 2018-02 — — (47.6 ) (47.6 ) Balance as of April 1, 2018 $ (84.8 ) $ (1.1 ) $ (271.1 ) $ (357.0 ) The reclassifications out of AOCI to net income for the first quarter ended March 31, 2019 and April 1, 2018 are as follows (in millions): Amount Reclassified from AOCI Three Months Ended Amount Reclassified from AOCI Three Months Ended Statement of Income March 31, 2019 April 1, 2018 Presentation (Gain) loss on cash flow hedges: (Gain) loss recognized in income on derivatives $ (2.0 ) $ 1.3 See Note 4 Income tax impact 0.5 (0.2 ) Provision for income taxes Total $ (1.5 ) $ 1.1 Amortization of defined benefit pension and postretirement plan items: Amortization of prior service cost $ (1.5 ) $ (1.5 ) Costs and expenses Amortization of net actuarial loss 7.6 7.3 Costs and expenses Total before tax 6.1 5.8 Income tax impact (1.5 ) (1.5 ) Provision for income taxes Total $ 4.6 $ 4.3

Business Combinations, Goodwill

Business Combinations, Goodwill and Acquired Intangible Assets	3 Months Ended
	Mar. 31, 2019
Business Combinations and Investments, Goodwill and Acquired Intangible Assets [Abstract]
Business Combinations, Goodwill and Acquired Intangible Assets	Business Combinations, Goodwill and Acquired Intangible Assets Acquisition of the scientific imaging businesses of Roper Technologies, Inc. On February 5, 2019, we acquired the scientific imaging businesses of Roper Technologies, Inc. for $225.0 million in cash, subject to a working capital purchase price adjustment. Principally located in the United States and Canada, the acquired businesses are part of the Digital Imaging segment. The acquired businesses include Princeton Instruments, Photometrics and Lumenera. The acquired businesses provide a range of imaging solutions, primarily for life sciences, academic research and customized OEM industrial imaging solutions. Princeton Instruments and Photometrics manufacture state-of-the-art cameras, spectrographs and optics for advanced research in physical sciences, life sciences research and spectroscopy imaging. Applications and markets include materials analysis, quantum technology and cell biology imaging using fluorescence and chemiluminescence. Lumenera primarily provides rugged USB-based customized cameras for markets such as traffic management, as well as life sciences applications. Teledyne funded the acquisition with borrowings under its credit facility and cash on hand. The results of the acquisition have been included in Teledyne’s results since the date of the acquisition. Goodwill and Acquired Intangible Assets Teledyne’s goodwill was $1,885.1 million at March 31, 2019 and $1,735.2 million at December 30, 2018 . The increase in the balance of goodwill in 2019 resulted from $145.4 million in goodwill from the acquisition of the scientific imaging businesses of Roper Technologies, Inc. Teledyne’s net acquired intangible assets were $389.0 million at March 31, 2019 and $344.3 million at December 30, 2018 . The increase in the balance of net acquired intangible assets resulted from $52.4 million in acquired intangible assets from the acquisition of the scientific imaging businesses of Roper Technologies, Inc., partially offset by amortization of acquired intangible assets. The Company is in the process of specifically identifying the amount to be assigned to certain assets, including acquired intangible assets, and liabilities and the related impact on taxes and goodwill for the acquisition of the scientific imaging businesses of Roper Technologies, Inc. since there was insufficient time between the acquisition date and the end of the period to finalize the analysis.

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments Teledyne transacts business in various foreign currencies and has international sales and expenses denominated in foreign currencies, subjecting the Company to foreign currency risk. The Company’s primary foreign currency risk management objective is to protect the U.S. dollar value of future cash flows and minimize the volatility of reported earnings. All derivatives are recorded on the balance sheet at fair value. As discussed below, the accounting for gains and losses resulting from changes in fair value depends on the use of the derivative and whether it is designated and qualifies for hedge accounting. The Company utilizes foreign currency forward contracts to reduce the volatility of cash flows primarily related to forecasted revenues and expenses denominated in Canadian dollars for our Canadian companies, including DALSA and in British pounds for our UK companies, including e2v. These contracts are designated and qualify as cash flow hedges. The Company has converted a U.S. dollar denominated, variable rate debt obligation into a euro fixed rate obligation using a receive float, pay fixed cross currency swap. This cross currency swap is designated as a cash flow hedge. Cash Flow Hedging Activities The effectiveness of the forward contract cash flow hedge, which exclude time value, and the cross currency swap cash flow hedge is assessed prospectively and retrospectively on a monthly basis using regression analysis, as well as using other timing and probability criteria. To receive hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedges and must be highly effective in offsetting changes to future cash flows on hedged transactions. The effective portion of the cash flow hedge forward contracts’ gains or losses resulting from changes in the fair value of these hedges is initially reported, net of tax, as a component of AOCI in stockholders’ equity until the underlying hedged item is reflected in our consolidated statements of income, at which time the effective amount in AOCI is reclassified to cost of sales in our consolidated statements of income. For the cross currency swap cash flow hedge, effective amounts are recorded in AOCI, and reclassified into interest expense in the consolidated statements of income. In addition, for the cross currency swap an amount is reclassified from AOCI to other income and expense each reporting period, to offset the earnings impact of the remeasurement of the hedged liability. Net deferred losses recorded in AOCI, net of tax, for the forward contracts that will mature in the next twelve months total $1.2 million . These losses are expected to be offset by anticipated gains in the value of the forecasted underlying hedged item. Amounts related to the cross currency swap expected to be reclassified from AOCI into income in the next twelve months total $0.1 million . In the event that the underlying forecasted transactions do not occur, or it becomes remote that they will occur, within the defined hedge period, the gains or losses on the related cash flow hedges will be reclassified from AOCI to other income and expense. During the current reporting period, all forecasted transactions occurred and, therefore, there were no such gains or losses reclassified to other income and expense. As of March 31, 2019 , Teledyne had foreign currency forward contracts designated as cash flow hedges to buy Canadian dollars and to sell U.S. dollars totaling $80.9 million . These foreign currency forward contracts have maturities ranging from June 2019 to May 2020. Teledyne had foreign currency forward contracts designated as cash flow hedges to buy British pounds and to sell U.S. dollars totaling $17.4 million . These foreign currency forward contracts have maturities ranging from June 2019 to May 2020. Together the contracts had a negative fair value of $2.0 million . The cross currency swap has notional amounts of €93.0 million equivalent to $100.0 million , and matures in October 2019. The effect of derivative instruments designated as cash flow hedges in the condensed consolidated financial statements for the first quarter ended March 31, 2019 and April 1, 2018 was as follows (in millions): First Quarter 2019 2018 Net gain (loss) recognized in AOCI (a) $ 4.3 $ (3.7 ) Net gain (loss) reclassified from AOCI into cost of sales (a) $ (0.6 ) $ 1.2 Net gain reclassified from AOCI into interest expense (a) $ 0.8 $ 0.5 Net gain (loss) reclassified from AOCI into other income and expense, net (b) $ 1.8 $ (3.0 ) Net foreign exchange gain (loss) recognized in other income and expense, net (c) $ (0.2 ) $ — a) Effective portion, pre-tax b) Amount reclassified to offset earnings impact of liability hedged by cross currency swap c) Amount excluded from effectiveness testing Non-Designated Hedging Activities In addition, the Company utilizes foreign currency forward contracts to mitigate foreign exchange rate risk associated with foreign currency denominated monetary assets and liabilities, including intercompany receivables and payables. As of March 31, 2019 , Teledyne had non-designated foreign currency contracts of this type in the following pairs (in millions): Contracts to Buy Contracts to Sell Currency Amount Currency Amount Canadian Dollars C$ 24.4 U.S. Dollars US$ 18.5 Canadian Dollars C$ 13.2 Euros € 8.7 Great Britain Pounds £ 1.1 Australian Dollars A$ 2.1 Great Britain Pounds £ 33.1 U.S. Dollars US$ 43.2 Singapore Dollars S$ 2.3 U.S. Dollars US$ 1.7 Euros € 31.2 U.S. Dollars US$ 35.1 U.S. Dollars US$ 2.7 Japanese Yen ¥ 300.0 Danish Krone DKR 63.0 U.S. Dollars US$ 9.5 Great Britain Pounds £ 7.3 Euros € 8.5 Great Britain Pounds £ 2.4 Hong Kong Dollars HK$ 24.6 The above table includes non-designated hedges derived from terms contained in triggered or previously designated cash flow hedges. The gains and losses on these derivatives which are not designated as hedging instruments are intended to, at a minimum, partially offset the transaction gains and losses recognized in earnings. Teledyne does not use foreign currency forward contracts for speculative or trading purposes. The effect of derivative instruments not designated as cash flow hedges recognized in other income and expense for the first quarter ended March 31, 2019 was income of $1.6 million . The effect of derivative instruments not designated as cash flow hedges in other income and expense for the first quarter ended April 1, 2018 was expense of $0.8 million . The income/expense was largely offset by losses/gains in the value of the underlying hedged item excluding the impact of forward points. Fair Value of Derivative Financial Instruments The Company has elected to use the income approach to value the derivatives, using observable Level 2 market expectations at measurement date and standard valuation techniques to convert future amounts to a single present amount. Level 2 inputs for the valuations are limited to quoted prices for similar assets or liabilities in active markets (specifically futures contracts on LIBOR and EURIBOR) and inputs other than quoted prices that are observable for the asset or liability (specifically LIBOR and EURIBOR cash and swap rates, foreign currency forward rates and cross currency basis spreads). Mid-market pricing is used as a practical expedient for fair value measurements. The fair value measurement of an asset or liability must reflect the nonperformance risk of the entity and the counterparty. Therefore, the impact of the counterparty’s creditworthiness when in an asset position and the Company’s creditworthiness when in a liability position has also been factored into the fair value measurement of the derivative instruments and did not have a material impact on the fair value of these derivative instruments. Both the counterparty and the Company are expected to continue to perform under the contractual terms of the instruments. The fair values of the Company’s derivative financial instruments are presented below. All fair values for these derivatives were measured using Level 2 information as defined by the accounting standard hierarchy (in millions): Asset/(Liability) Derivatives Balance sheet location March 31, 2019 December 30, 2018 Derivatives designated as hedging instruments: Cash flow forward contracts Other assets $ 0.1 $ — Cash flow cross currency swap Accrued liabilities (4.3 ) (6.3 ) Cash flow forward contracts Accrued liabilities (2.1 ) (4.2 ) Total derivatives designated as hedging instruments (6.3 ) (10.5 ) Derivatives not designated as hedging instruments: Non-designated forward contracts Other current assets 0.3 — Non-designated forward contracts Accrued liabilities (0.7 ) (0.6 ) Total derivatives not designated as hedging instruments (0.4 ) (0.6 ) Total liability derivatives, net $ (6.7 ) $ (11.1 )

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share For the first quarter of 2019, 6,480 stock options were excluded in the computation of diluted earnings per share because they had exercise prices that were greater than the weighted average market price of the Company’s common stock during the period. For the first quarter of 2018, 370,583 stock options were excluded in the computation of diluted earnings per share because they had exercise prices that were greater than the weighted average market price of the Company’s common stock during the period. The weighted average number of common shares used in the calculation of basic and diluted earnings per share consisted of the following (in millions): First Quarter 2019 2018 Weighted average basic common shares outstanding 36.1 35.6 Effect of dilutive securities (primarily stock options) 1.1 1.2 Weighted average diluted common shares outstanding 37.2 36.8

Stock-Based Compensation Plans

Stock-Based Compensation Plans	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans Teledyne has long-term incentive plans pursuant to which it has granted non-qualified stock options, restricted stock and performance shares to certain employees. The Company also has non-employee Board of Director stock compensation plans, pursuant to which common stock, stock options and restricted stock units have been issued to its directors. Stock Incentive Plan Stock option compensation expense was $8.9 million for the first quarter of 2019 and was $4.9 million for the first quarter of 2018. Employee stock option grants are charged to expense evenly over the three year vesting period except for stock options that were granted in 2019 to Teledyne’s President and Chief Executive Officer and Teledyne’s Executive Chairman which were expensed immediately. For 2019 , the Company currently expects approximately $26.6 million in stock option compensation expense based on stock options currently outstanding. This amount can be impacted by employee retirements and terminations or stock options granted during the remainder of the year. The Company issues shares of common stock upon the exercise of stock options. The following assumptions were used in the valuation of stock options granted in 2019: 2019 Expected volatility 26.7% Risk-free interest rate range 2.47% to 2.70% Expected life in years 6.6 Expected dividend yield — Based on the assumptions used in the valuation of stock options, the grant date weighted average fair value of stock options granted in 2019 was $72.00 per share. Stock option transactions for the first quarter of 2019 are summarized as follows: 2019 First Quarter Shares Weighted Average Exercise Price Beginning balance 2,064,740 $ 104.66 Granted 390,789 $ 217.58 Exercised (120,783 ) $ 84.76 Canceled (17,223 ) $ 171.49 Ending balance 2,317,523 $ 124.24 Options exercisable at end of period 1,549,179 $ 79.52 Performance Share Plan and Restricted Stock Award Program Under the 2015 to 2017 Performance Share Plan, in the first quarter of 2019 the Company issued 8,586 shares of Teledyne common stock and in the first quarter of 2018, the Company issued 6,481 shares of Teledyne common stock. A total of 15,578 shares remain to be issued in 2020, subject to the terms of the plan. In the first quarter of 2018, the performance cycle for the three -year period ending December 31, 2020, was set. Under the plan, the maximum number of shares that could be issued in three equal installments in 2021, 2022 and 2023, is 58,729 . The following table shows the restricted stock activity for the first three months of 2019: Shares Weighted average fair value per share Balance, December 30, 2018 74,220 $ 108.05 Granted 17,522 $ 200.00 Vested (35,330 ) $ 72.91 Balance, March 31, 2019 56,412 $ 158.62

Inventories

Inventories	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are stated at current cost net of reserves for excess, slow moving and obsolete inventory, less progress payments. Inventories are valued under the FIFO method, LIFO method and average cost method. Inventories at cost determined on the average cost or the FIFO methods were $360.2 million at March 31, 2019 and $331.3 million at December 30, 2018 . The remainder of the inventories using the LIFO method were $41.9 million at March 31, 2019 and $42.3 million at December 30, 2018 . Interim LIFO calculations are based on the Company’s estimates of expected year-end inventory levels and costs since an actual valuation of inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Because these estimates are subject to many factors beyond the Company’s control, interim results are subject to the final year-end LIFO inventory valuation. Balance at Inventories (in millions): March 31, 2019 December 30, 2018 Raw materials and supplies $ 221.1 $ 205.6 Work in process 125.4 117.5 Finished goods 55.6 50.5 402.1 373.6 Reduction to LIFO cost basis (9.1 ) (9.3 ) Total inventories, net $ 393.0 $ 364.3

Disclosures for Customer Contra

Disclosures for Customer Contracts	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Disclosures for Customer Contracts	Customer Contracts Estimate at Completion Process For over time contracts using the cost-to-cost method, we have an Estimate at Completion (“EAC”) process in which management reviews the progress and execution of our performance obligations. This EAC process requires management judgment relative to assessing risks, estimating contract revenue and cost, and making assumptions for schedule and technical issues. Since certain contracts extend over a longer period of time, the impact of revisions in cost and revenue estimates during the progress of work may adjust the current period earnings through a cumulative catch-up basis. This method recognizes, in the current period, the cumulative effect of the changes on current and prior quarters. Additionally, if the current contract estimate indicates a loss, a provision is made for the total anticipated loss in the period that it becomes evident. Contract cost and revenue estimates for significant contracts are reviewed and reassessed quarterly. The majority of revenue recognized over time uses an EAC process. The net aggregate effects of these changes in estimates on contracts accounted for under the cost-to-cost method in the first three months of 2019 and 2018 was approximately $2.8 million and $0.2 million of favorable operating income, primarily related to changes in estimates that favorably impacted revenue. None of the effects of changes in estimates on any individual contract were material to the condensed consolidated statements of income for any period presented. Contract Liabilities We recognize a liability for interim and advance payments in excess of revenue recognized and present it as a contract liability which is included within accrued liabilities and other long-term liabilities on the Condensed Consolidated Balance Sheet, which represented $111.2 million and $20.5 million as of March 31, 2019, and $111.5 million and $15.3 million as of December 30, 2018, respectively. The Company recognized revenue of $35.4 million during the three months ended March 31, 2019 from contract liabilities that existed at the beginning of year. The Company recognizes the incremental costs of obtaining or fulfilling a contract as expense when incurred if the amortization period of the asset is one year or less. Incremental costs to obtain or fulfill contracts with an amortization period greater than one year were not material. Remaining Performance Obligations Remaining performance obligations represent the transaction price of firm orders for which work has not been performed as of the period end date and excludes unexercised contract options and potential orders under ordering-type contracts (e.g., indefinite-delivery, indefinite-quantity). As of March 31, 2019, the aggregate amount of the transaction price allocated to remaining performance obligations was $1,760.0 million . The Company expects approximately 79% of remaining performance obligations to be recognized into revenue within the next twelve months, with the remaining 21% recognized thereafter. Product Warranty Costs Some of the Company’s products are subject to specified warranties, and the Company provides for the estimated cost of product warranties. The adequacy of the warranty reserve is assessed regularly, and the reserve is adjusted as necessary based on a review of historic warranty experience with respect to the applicable business or products, as well as the length and actual terms of the warranties. The warranty reserve is included in current and long-term accrued liabilities on the Condensed Consolidated Balance Sheet. First Quarter Warranty Reserve (in millions): 2019 2018 Balance at beginning of year $ 21.0 $ 21.1 Accruals for product warranties charged to expense 2.2 3.1 Cost of product warranty claims (2.9 ) (2.2 ) Acquisition 0.3 — Balance at end of period $ 20.6 $ 22.0

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax provision is calculated using an estimated annual effective tax rate, based upon expected annual income, permanent items, statutory rates and planned tax strategies in the various jurisdictions in which the Company operates. However, losses in certain jurisdictions and discrete items, such as the resolution of uncertain tax positions, are treated separately. The Company’s effective income tax rate for the first quarter of 2019 was 18.9% . The Company’s effective income tax rate for the first quarter of 2018 was 19.1% . The first quarter of 2019 and 2018 include net discrete income tax benefits of $3.1 million and $2.1 million , respectively. The 2019 first quarter net discrete tax benefits includes $2.9 million related to share-based accounting. The 2018 first quarter net discrete tax benefits includes $3.0 million related to share-based accounting.

Long-Term Debt and Letters of C

Long-Term Debt and Letters of Credit	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt and Letters of Credit	Long-Term Debt and Letters of Credit Balance at Long-Term Debt (in millions): March 31, 2019 December 30, 2018 $750.0 million credit facility due March 2024, weighted average rate of 3.45% at March 31, 2019 and 5.50% at December 30, 2018 $ 149.0 $ 29.0 Term loan due October 2019, variable rate of 3.61% at March 31, 2019 and 3.63% at December 30, 2018, swapped to a Euro fixed rate of 0.7055% 100.0 100.0 2.61% Fixed Rate Senior Notes due December 2019 30.0 30.0 5.30% Fixed Rate Senior Notes due September 2020 75.0 75.0 2.81% Fixed Rate Senior Notes due November 2020 25.0 25.0 3.09% Fixed Rate Senior Notes due December 2021 95.0 95.0 3.28% Fixed Rate Senior Notes due November 2022 100.0 100.0 0.70% € 50 Million Fixed Rate Senior Notes due April 2022 56.1 57.2 0.92% € 100 Million Fixed Rate Senior Notes due April 2023 112.2 114.4 1.09% € 100 Million Fixed Rate Senior Notes due April 2024 112.2 114.4 Other debt 3.0 8.8 Total debt 857.5 748.8 Less: current portion of long-term debt and debt issuance costs (132.9 ) (138.7 ) Total long-term debt $ 724.6 $ 610.1 On March 15, 2019, Teledyne amended its $750.0 million credit agreement to extend the maturity date from December 2020 to March 2024. While the borrowing capacity remains at $ 750.0 million , the amendment permits Teledyne to increase the aggregate amount of the borrowing capacity by up to $250.0 million subject to certain conditions. Available borrowing capacity under the $750.0 million credit facility, which is reduced by borrowings and certain outstanding letters of credit, was $571.2 million at March 31, 2019 . The credit agreements require the Company to comply with various financial and operating covenants and at March 31, 2019 , the Company was in compliance with these covenants. Teledyne estimates the fair value of its long-term debt based on debt of similar type, rating and maturity and at comparable interest rates. The Company’s long-term debt is considered a level 2 fair value hierarchy and is valued based on observable market data. The estimated fair value of Teledyne’s long-term debt at March 31, 2019 and December 30, 2018 , approximated the carrying value. At March 31, 2019 , Teledyne had $34.7 million in outstanding letters of credit.

Lawsuits, Claims, Commitments,

Lawsuits, Claims, Commitments, Contingencies and Related Matters	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Lawsuits, Claims, Commitments, Contingencies and Related Matters	Lawsuits, Claims, Commitments, Contingencies and Related Matters For a further description of the Company’s commitments and contingencies, reference is made to Note 14 of the Company’s financial statements as of and for the fiscal year ended December 30, 2018 , included in the 2018 Form 10-K. At March 31, 2019 , the Company’s reserves for environmental remediation obligations totaled $6.4 million , of which $1.5 million is included in current accrued liabilities. At December 30, 2018, the Company’s reserves for environmental remediation obligations totaled $6.0 million . The Company evaluates whether it may be able to recover a portion of future costs for environmental liabilities from its insurance carriers and from third parties. The timing of expenditures depends on a number of factors that vary by site, including the nature and extent of contamination, the number of potentially responsible parties, the timing of regulatory approvals, the complexity of the investigation and remediation, and the standards for remediation. The Company expects that it will expend present accruals over many years and will complete remediation of all sites with which it has been identified in up to 30 years . A number of other lawsuits, claims and proceedings have been or may be asserted against the Company, including those pertaining to product liability, acquisitions, patent infringement, contracts, environmental, employment and employee benefits matters. While the outcome of litigation cannot be predicted with certainty, and some of these lawsuits, claims or proceedings may be determined adversely to the Company, management does not believe that the disposition of any such pending matters is likely to have a material adverse effect on the Company’s financial statements.

Pension Plans and Postretiremen

Pension Plans and Postretirement Benefits	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Pension Plans and Postretirement Benefits	Pension Plans and Postretirement Benefits For the domestic pension plans, the discount rate increased to 4.59% in 2019 compared with a 4.02% discount rate used in 2018 . Teledyne has not made any cash pension contributions to its domestic qualified pension plan since 2013. No cash pension contributions are planned for 2019 for the domestic qualified pension plan. First Quarter 2019 2018 Service cost — benefits earned during the period (in millions) $ 2.4 $ 2.7 Pension non-service income (in millions): Interest cost on benefit obligation $ 8.4 $ 8.1 Expected return on plan assets (16.5 ) (17.9 ) Amortization of prior service cost (1.5 ) (1.5 ) Amortization of net actuarial loss 7.7 7.9 Curtailment/settlements (0.3 ) — Pension non-service income $ (2.2 ) $ (3.4 ) Teledyne sponsors several postretirement defined benefit plans that provide health care and life insurance benefits for certain eligible retirees. First Quarter Postretirement benefits non-service (income)/expense (in millions): 2019 2018 Interest cost on benefit obligation $ 0.1 $ 0.1 Amortization of net actuarial gain — (0.1 ) Postretirement benefits non-service (income)/expense $ 0.1 $ —

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information Teledyne is a leading provider of sophisticated instrumentation, digital imaging products and software, aerospace and defense electronics, and engineered systems. Our customers include government agencies, aerospace prime contractors, energy exploration and production companies, major industrial companies and airlines. The Company has four reportable segments: Instrumentation; Digital Imaging; Aerospace and Defense Electronics; and Engineered Systems. Segment results includes net sales and operating income by segment but excludes non-service retirement benefit income, equity income or loss, unusual non-recurring legal matter settlements, interest income and expense, gains and losses on the disposition of assets, sublease rental income and non-revenue licensing and royalty income, domestic and foreign income taxes and corporate office expenses. Corporate expense includes various administrative expenses relating to the corporate office and certain non-operating expenses, including certain acquisition-related transaction costs, not allocated to our segments. The following table presents Teledyne’s segment disclosures (dollars in millions): First Quarter % 2019 2018 Change Net sales(a): Instrumentation $ 256.5 $ 239.0 7.3 % Digital Imaging 235.3 211.0 11.5 % Aerospace and Defense Electronics 180.4 173.6 3.9 % Engineered Systems 73.0 72.0 1.4 % Total net sales $ 745.2 $ 695.6 7.1 % Operating income: Instrumentation $ 39.9 $ 27.8 43.5 % Digital Imaging 37.0 34.6 6.9 % Aerospace and Defense Electronics 33.8 31.7 6.6 % Engineered Systems 4.7 7.2 (34.7 )% Corporate expense (18.1 ) (12.9 ) 40.3 % Operating income $ 97.3 $ 88.4 10.1 % (a) Net sales excludes inter-segment sales of $6.4 million and $5.2 million for the first quarter of 2019 and 2018, respectively. Identifiable assets are those assets used in the operations of the segments. Corporate assets primarily consist of cash, deferred taxes, net pension assets/liabilities and other assets (in millions): Identifiable assets: March 31, 2019 December 30, 2018 Instrumentation $ 1,422.2 $ 1,392.7 Digital Imaging 1,832.2 1,600.9 Aerospace and Defense Electronics 597.4 521.4 Engineered Systems 117.6 116.6 Corporate 192.3 177.7 Total identifiable assets $ 4,161.7 $ 3,809.3 Product Lines The Instrumentation segment includes three product lines: Environmental Instrumentation, Marine Instrumentation and Test and Measurement Instrumentation. Teledyne’s other three segments each contain one product line. The following tables provide a summary of the net sales by product line for the Instrumentation segment (in millions): First Quarter Instrumentation 2019 2018 Marine Instrumentation $ 105.2 $ 104.2 Environmental Instrumentation 86.4 81.2 Test and Measurement Instrumentation 64.9 53.6 Total $ 256.5 $ 239.0 We also disaggregate our revenue from contracts with customers by customer type, contract-type and geographic region for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. First Quarter Ended March 31, 2019 First Quarter Ended April 1, 2018 Customer Type Customer Type (in millions) United States Government (a) Other, Primarily Commercial Total United States Government (a) Other, Primarily Commercial Total Net Sales: Instrumentation $ 14.2 $ 242.3 $ 256.5 $ 12.8 $ 226.2 $ 239.0 Digital Imaging 26.2 209.1 235.3 22.4 188.6 211.0 Aerospace and Defense Electronics 68.0 112.4 180.4 65.3 108.3 173.6 Engineered Systems 61.5 11.5 73.0 59.0 13.0 72.0 $ 169.9 $ 575.3 $ 745.2 $ 159.5 $ 536.1 $ 695.6 a) Includes sales as a prime contractor or subcontractor. First Quarter Ended March 31, 2019 First Quarter Ended April 1, 2018 Contract Type Contract Type (in millions) Fixed Price Cost Type Total Fixed Price Cost Type Total Net Sales: Instrumentation $ 251.0 $ 5.5 $ 256.5 $ 234.1 $ 4.9 $ 239.0 Digital Imaging 213.3 22.0 235.3 191.2 19.8 211.0 Aerospace and Defense Electronics 180.1 0.3 180.4 173.4 0.2 173.6 Engineered Systems 18.2 54.8 73.0 23.2 48.8 72.0 $ 662.6 $ 82.6 $ 745.2 $ 621.9 $ 73.7 $ 695.6 First Quarter Ended March 31, 2019 First Quarter Ended April 1, 2018 Geographic Region (a) Geographic Region (a) (in millions) United States Europe All other Total United States Europe All other Total Net sales: Instrumentation $ 211.1 $ 33.6 $ 11.8 $ 256.5 $ 191.0 $ 39.4 $ 8.6 $ 239.0 Digital Imaging 72.4 70.3 92.6 235.3 56.8 67.0 87.2 211.0 Aerospace and Defense Electronics 165.1 15.1 0.2 180.4 154.1 18.8 0.7 173.6 Engineered Systems 71.2 1.8 — 73.0 70.2 1.8 — 72.0 $ 519.8 $ 120.8 $ 104.6 $ 745.2 $ 472.1 $ 127.0 $ 96.5 $ 695.6 a) Net sales by geographic region of origin.

General (Policies)

General (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared by Teledyne Technologies Incorporated (“Teledyne” or the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and disclosures normally included in notes to consolidated financial statements have been condensed or omitted pursuant to such rules and regulations, but resultant disclosures are in accordance with accounting principles generally accepted in the United States (“GAAP”) as they apply to interim reporting. The condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the related notes in Teledyne’s Annual Report on Form 10-K for the fiscal year ended December 30, 2018 (“ 2018 Form 10-K”). In the opinion of Teledyne’s management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, Teledyne’s consolidated financial position as of March 31, 2019 and the consolidated results of operations, consolidated comprehensive income and consolidated cash flows for the three months then ended. The results of operations and cash flows for the three months ended March 31, 2019 are not necessarily indicative of the results of operations or cash flows to be expected for any subsequent quarter or the full fiscal year. Certain prior year amounts have been reclassified to conform to the current period presentation. In the second quarter of 2018, we realigned the reporting structure for certain of our microwave product groupings. These products, acquired with the acquisition of e2v technologies plc (“e2v”) were formerly reported as part of the Aerospace and Defense Electronics segment and are now reported as part of the Digital Imaging segment. Previously reported segment data has been adjusted to reflect this change.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-02, “Income Statement-Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, to address a specific consequence of the Tax Cuts and Jobs Act (“Tax Act”) by allowing a reclassification from accumulated other comprehensive income (“AOCI”) to retained earnings for stranded tax effects resulting from the Tax Act reduction of the U.S. federal corporate income tax rate. The guidance is effective for all entities for annual periods beginning after December 15, 2018, with early adoption permitted. In 2018, we elected to early adopt this ASU and elected to reclassify, in the period of enactment, stranded tax effects totaling $47.6 million from AOCI to retained earnings in our condensed consolidated balance sheet. The reclassification amount primarily included income tax effects related to our pension and postretirement benefit plans. Income tax effects remaining in AOCI will be released into earnings as the related pretax amounts are reclassified to earnings. In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815) Targeted Improvements to Accounting for Hedging Activities.” This new guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships and expands and refines hedge accounting for both nonfinancial and financial risk components. This new guidance also simplifies and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This new guidance is effective for fiscal years beginning after December 15, 2018 and for interim periods therein, with early adoption permitted. We adopted the new guidance as of December 31, 2018 using the modified retrospective approach, there was no cumulative adjustment to retained earnings related to hedge ineffectiveness for the year ended December 31, 2018. Additionally, as a result of the adoption, we no longer disclose the ineffective portion of the change in fair value of our derivative financial instruments. The entire change in the fair value of the cash flow hedging instruments aside from components excluded from the assessment of hedge effectiveness will now be recorded in other comprehensive income and subsequently reclassified to earnings in the period the hedged item impacts earnings. The adoption of this standard did not have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment, which eliminates the computation of the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record a goodwill impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We expect the adoption of this guidance will reduce the complexity surrounding the evaluation of goodwill for impairment. The impact of this new guidance for the Company will depend on the outcomes of future goodwill impairment tests. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The new guidance requires lessees to recognize most leases on their balance sheet as a right-of-use asset and a lease liability, other than leases that meet the definition of a short-term lease. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. We adopted the new guidance on December 31, 2018, the beginning of our 2019 fiscal year using the modified retrospective transition method. Prior period comparative information was not adjusted. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification. The adoption of this guidance did not have a material impact related to existing leases and as a result, a cumulative-effect adjustment was not recorded. Also, the adoption of the new guidance did not have a material impact on our results of operations or cash flows. Lease Commitments We determine if an arrangement is a lease at inception. Effective December 31, 2018, operating leases are recorded as right-of-use assets, other long-term lease liabilities and current accrued liabilities in our condensed consolidated balance sheets. Finance leases are included in property and equipment, other current liabilities, and other long-term liabilities in our condensed consolidated balance sheets. Operating lease right-of-use assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease right-of-use assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Since most of our leases do not provide an implicit rate, we use our incremental borrowing rate to determine the present value of lease payments at the commencement date. We use the implicit rate when readily determinable. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Many lease agreements contain renewal options at either a fixed cost, fixed increase or market value adjustment. For those leases with renewal options, we will include the renewal options that are reasonably certain to be exercised, for purposes of calculating the lease liability and corresponding right of use asset. Teledyne will evaluate the likelihood of exercising each renewal option based on many factors, including the length of the renewal option and the future new lease cost, if known, or the estimated future new lease cost if it is not a fixed amount. Operating Leases Teledyne has approximately 120 operating lease agreements, which are primarily for manufacturing facilities and office space. These agreements frequently include one or more renewal options and require the Company to pay for utilities, taxes, insurance and maintenance expense. No lease agreement imposes a restriction on the Company’s ability to engage in financing transactions or enter into further lease agreements. At March 31, 2019, Teledyne has right-of-use assets of $134.3 million and a total lease liability for operating leases of $144.0 million of which $126.0 million is included in long-term lease liabilities and $18.0 million is included in current accrued liabilities. At March 31, 2019, future minimum lease payments for operating leases with non-cancelable terms of more than one year were as follows (in millions): Remainder of 2019 $ 22.5 2020 21.0 2021 19.3 2022 16.9 2023 15.6 Thereafter 79.9 Total minimum lease payments 175.2 Less: Imputed interest (31.2 ) Current portion (18.0 ) Present value of minimum lease payments, net of current portion $ 126.0 The weighted average remaining lease term for operating leases is approximately 10 years and the weighted average discount rate is 4.09% . Operating lease expense was $5.8 million for the first quarter of 2019. As previously disclosed in Note 13 of the Notes to Consolidated Financial Statements included in our 2018 Form 10-K and under the previous lease accounting, future minimum lease payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year were as follows (in millions): As of December 30, 2018 2019 $ 23.2 2020 20.6 2021 18.4 2022 18.4 2023 11.8 Thereafter 48.2 Total minimum lease payments $ 140.6 Other Our finance leases and subleases are not material.

General (Tables)

General (Tables)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating Lease Schedule of Maturity	At March 31, 2019, future minimum lease payments for operating leases with non-cancelable terms of more than one year were as follows (in millions): Remainder of 2019 $ 22.5 2020 21.0 2021 19.3 2022 16.9 2023 15.6 Thereafter 79.9 Total minimum lease payments 175.2 Less: Imputed interest (31.2 ) Current portion (18.0 ) Present value of minimum lease payments, net of current portion $ 126.0
Operating Lease Schedule of Maturity	As previously disclosed in Note 13 of the Notes to Consolidated Financial Statements included in our 2018 Form 10-K and under the previous lease accounting, future minimum lease payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year were as follows (in millions): As of December 30, 2018 2019 $ 23.2 2020 20.6 2021 18.4 2022 18.4 2023 11.8 Thereafter 48.2 Total minimum lease payments $ 140.6

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Changes in AOCI by Component	The changes in AOCI by component, net of tax, for the first quarter ended March 31, 2019 and April 1, 2018 are as follows (in millions): Foreign Currency Translation Cash Flow Hedges and Other Pension and Postretirement Benefits Total Balance as of December 30, 2018 $ (181.5 ) $ (4.9 ) $ (306.8 ) $ (493.2 ) Other comprehensive income before reclassifications 17.0 3.3 — 20.3 Amounts reclassified from AOCI — (1.5 ) 4.6 3.1 Net other comprehensive income 17.0 1.8 4.6 23.4 Balance as of March 31, 2019 $ (164.5 ) $ (3.1 ) $ (302.2 ) $ (469.8 ) Foreign Currency Translation Cash Flow Hedges and Other Pension and Postretirement Benefits Total Balance as of December 31, 2017 $ (102.0 ) $ 0.5 $ (227.8 ) $ (329.3 ) Other comprehensive income/(loss) before reclassifications 17.2 (2.7 ) — 14.5 Amounts reclassified from AOCI — 1.1 4.3 5.4 Net other comprehensive income/(loss) 17.2 (1.6 ) 4.3 19.9 Reclassification of income tax effects for ASU 2018-02 — — (47.6 ) (47.6 ) Balance as of April 1, 2018 $ (84.8 ) $ (1.1 ) $ (271.1 ) $ (357.0 ) The reclassifications out of AOCI to net income for the first quarter ended March 31, 2019 and April 1, 2018 are as follows (in millions): Amount Reclassified from AOCI Three Months Ended Amount Reclassified from AOCI Three Months Ended Statement of Income March 31, 2019 April 1, 2018 Presentation (Gain) loss on cash flow hedges: (Gain) loss recognized in income on derivatives $ (2.0 ) $ 1.3 See Note 4 Income tax impact 0.5 (0.2 ) Provision for income taxes Total $ (1.5 ) $ 1.1 Amortization of defined benefit pension and postretirement plan items: Amortization of prior service cost $ (1.5 ) $ (1.5 ) Costs and expenses Amortization of net actuarial loss 7.6 7.3 Costs and expenses Total before tax 6.1 5.8 Income tax impact (1.5 ) (1.5 ) Provision for income taxes Total $ 4.6 $ 4.3

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Effect of Derivative Instruments Designated as Cash Flow Hedges	The effect of derivative instruments designated as cash flow hedges in the condensed consolidated financial statements for the first quarter ended March 31, 2019 and April 1, 2018 was as follows (in millions): First Quarter 2019 2018 Net gain (loss) recognized in AOCI (a) $ 4.3 $ (3.7 ) Net gain (loss) reclassified from AOCI into cost of sales (a) $ (0.6 ) $ 1.2 Net gain reclassified from AOCI into interest expense (a) $ 0.8 $ 0.5 Net gain (loss) reclassified from AOCI into other income and expense, net (b) $ 1.8 $ (3.0 ) Net foreign exchange gain (loss) recognized in other income and expense, net (c) $ (0.2 ) $ — a) Effective portion, pre-tax b) Amount reclassified to offset earnings impact of liability hedged by cross currency swap c) Amount excluded from effectiveness testing
Schedule of Notional Amounts of Outstanding Foreign Currency Contracts	As of March 31, 2019 , Teledyne had non-designated foreign currency contracts of this type in the following pairs (in millions): Contracts to Buy Contracts to Sell Currency Amount Currency Amount Canadian Dollars C$ 24.4 U.S. Dollars US$ 18.5 Canadian Dollars C$ 13.2 Euros € 8.7 Great Britain Pounds £ 1.1 Australian Dollars A$ 2.1 Great Britain Pounds £ 33.1 U.S. Dollars US$ 43.2 Singapore Dollars S$ 2.3 U.S. Dollars US$ 1.7 Euros € 31.2 U.S. Dollars US$ 35.1 U.S. Dollars US$ 2.7 Japanese Yen ¥ 300.0 Danish Krone DKR 63.0 U.S. Dollars US$ 9.5 Great Britain Pounds £ 7.3 Euros € 8.5 Great Britain Pounds £ 2.4 Hong Kong Dollars HK$ 24.6
Fair Values of Derivative Financial Instruments	The fair values of the Company’s derivative financial instruments are presented below. All fair values for these derivatives were measured using Level 2 information as defined by the accounting standard hierarchy (in millions): Asset/(Liability) Derivatives Balance sheet location March 31, 2019 December 30, 2018 Derivatives designated as hedging instruments: Cash flow forward contracts Other assets $ 0.1 $ — Cash flow cross currency swap Accrued liabilities (4.3 ) (6.3 ) Cash flow forward contracts Accrued liabilities (2.1 ) (4.2 ) Total derivatives designated as hedging instruments (6.3 ) (10.5 ) Derivatives not designated as hedging instruments: Non-designated forward contracts Other current assets 0.3 — Non-designated forward contracts Accrued liabilities (0.7 ) (0.6 ) Total derivatives not designated as hedging instruments (0.4 ) (0.6 ) Total liability derivatives, net $ (6.7 ) $ (11.1 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Computations of Basic and Diluted Earnings per Share	The weighted average number of common shares used in the calculation of basic and diluted earnings per share consisted of the following (in millions): First Quarter 2019 2018 Weighted average basic common shares outstanding 36.1 35.6 Effect of dilutive securities (primarily stock options) 1.1 1.2 Weighted average diluted common shares outstanding 37.2 36.8

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Valuation Assumptions	The following assumptions were used in the valuation of stock options granted in 2019: 2019 Expected volatility 26.7% Risk-free interest rate range 2.47% to 2.70% Expected life in years 6.6 Expected dividend yield —
Stock Option Transactions for Employee Stock Option Plans	Stock option transactions for the first quarter of 2019 are summarized as follows: 2019 First Quarter Shares Weighted Average Exercise Price Beginning balance 2,064,740 $ 104.66 Granted 390,789 $ 217.58 Exercised (120,783 ) $ 84.76 Canceled (17,223 ) $ 171.49 Ending balance 2,317,523 $ 124.24 Options exercisable at end of period 1,549,179 $ 79.52
Schedule of Restricted Stock Activity	The following table shows the restricted stock activity for the first three months of 2019: Shares Weighted average fair value per share Balance, December 30, 2018 74,220 $ 108.05 Granted 17,522 $ 200.00 Vested (35,330 ) $ 72.91 Balance, March 31, 2019 56,412 $ 158.62

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventories	Balance at Inventories (in millions): March 31, 2019 December 30, 2018 Raw materials and supplies $ 221.1 $ 205.6 Work in process 125.4 117.5 Finished goods 55.6 50.5 402.1 373.6 Reduction to LIFO cost basis (9.1 ) (9.3 ) Total inventories, net $ 393.0 $ 364.3

Supplemental Disclosures for Cu

Supplemental Disclosures for Customer Contracts (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Company's Product Warranty Reserve	First Quarter Warranty Reserve (in millions): 2019 2018 Balance at beginning of year $ 21.0 $ 21.1 Accruals for product warranties charged to expense 2.2 3.1 Cost of product warranty claims (2.9 ) (2.2 ) Acquisition 0.3 — Balance at end of period $ 20.6 $ 22.0

Long-Term Debt and Letters of_2

Long-Term Debt and Letters of Credit (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Summary of Long-Term Debt	Balance at Long-Term Debt (in millions): March 31, 2019 December 30, 2018 $750.0 million credit facility due March 2024, weighted average rate of 3.45% at March 31, 2019 and 5.50% at December 30, 2018 $ 149.0 $ 29.0 Term loan due October 2019, variable rate of 3.61% at March 31, 2019 and 3.63% at December 30, 2018, swapped to a Euro fixed rate of 0.7055% 100.0 100.0 2.61% Fixed Rate Senior Notes due December 2019 30.0 30.0 5.30% Fixed Rate Senior Notes due September 2020 75.0 75.0 2.81% Fixed Rate Senior Notes due November 2020 25.0 25.0 3.09% Fixed Rate Senior Notes due December 2021 95.0 95.0 3.28% Fixed Rate Senior Notes due November 2022 100.0 100.0 0.70% € 50 Million Fixed Rate Senior Notes due April 2022 56.1 57.2 0.92% € 100 Million Fixed Rate Senior Notes due April 2023 112.2 114.4 1.09% € 100 Million Fixed Rate Senior Notes due April 2024 112.2 114.4 Other debt 3.0 8.8 Total debt 857.5 748.8 Less: current portion of long-term debt and debt issuance costs (132.9 ) (138.7 ) Total long-term debt $ 724.6 $ 610.1

Pension Plans and Postretirem_2

Pension Plans and Postretirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Defined Benefit Pension Plans and Postretirement Benefit Plans	First Quarter 2019 2018 Service cost — benefits earned during the period (in millions) $ 2.4 $ 2.7 Pension non-service income (in millions): Interest cost on benefit obligation $ 8.4 $ 8.1 Expected return on plan assets (16.5 ) (17.9 ) Amortization of prior service cost (1.5 ) (1.5 ) Amortization of net actuarial loss 7.7 7.9 Curtailment/settlements (0.3 ) — Pension non-service income $ (2.2 ) $ (3.4 ) Teledyne sponsors several postretirement defined benefit plans that provide health care and life insurance benefits for certain eligible retirees. First Quarter Postretirement benefits non-service (income)/expense (in millions): 2019 2018 Interest cost on benefit obligation $ 0.1 $ 0.1 Amortization of net actuarial gain — (0.1 ) Postretirement benefits non-service (income)/expense $ 0.1 $ —

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Industry Segment Disclosures	The following table presents Teledyne’s segment disclosures (dollars in millions): First Quarter % 2019 2018 Change Net sales(a): Instrumentation $ 256.5 $ 239.0 7.3 % Digital Imaging 235.3 211.0 11.5 % Aerospace and Defense Electronics 180.4 173.6 3.9 % Engineered Systems 73.0 72.0 1.4 % Total net sales $ 745.2 $ 695.6 7.1 % Operating income: Instrumentation $ 39.9 $ 27.8 43.5 % Digital Imaging 37.0 34.6 6.9 % Aerospace and Defense Electronics 33.8 31.7 6.6 % Engineered Systems 4.7 7.2 (34.7 )% Corporate expense (18.1 ) (12.9 ) 40.3 % Operating income $ 97.3 $ 88.4 10.1 % (a) Net sales excludes inter-segment sales of $6.4 million and $5.2 million for the first quarter of 2019 and 2018, respectively. Corporate assets primarily consist of cash, deferred taxes, net pension assets/liabilities and other assets (in millions): Identifiable assets: March 31, 2019 December 30, 2018 Instrumentation $ 1,422.2 $ 1,392.7 Digital Imaging 1,832.2 1,600.9 Aerospace and Defense Electronics 597.4 521.4 Engineered Systems 117.6 116.6 Corporate 192.3 177.7 Total identifiable assets $ 4,161.7 $ 3,809.3
Summary of the sales by product line	The following tables provide a summary of the net sales by product line for the Instrumentation segment (in millions): First Quarter Instrumentation 2019 2018 Marine Instrumentation $ 105.2 $ 104.2 Environmental Instrumentation 86.4 81.2 Test and Measurement Instrumentation 64.9 53.6 Total $ 256.5 $ 239.0
Disaggregation of Revenue	We also disaggregate our revenue from contracts with customers by customer type, contract-type and geographic region for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. First Quarter Ended March 31, 2019 First Quarter Ended April 1, 2018 Customer Type Customer Type (in millions) United States Government (a) Other, Primarily Commercial Total United States Government (a) Other, Primarily Commercial Total Net Sales: Instrumentation $ 14.2 $ 242.3 $ 256.5 $ 12.8 $ 226.2 $ 239.0 Digital Imaging 26.2 209.1 235.3 22.4 188.6 211.0 Aerospace and Defense Electronics 68.0 112.4 180.4 65.3 108.3 173.6 Engineered Systems 61.5 11.5 73.0 59.0 13.0 72.0 $ 169.9 $ 575.3 $ 745.2 $ 159.5 $ 536.1 $ 695.6 a) Includes sales as a prime contractor or subcontractor. First Quarter Ended March 31, 2019 First Quarter Ended April 1, 2018 Contract Type Contract Type (in millions) Fixed Price Cost Type Total Fixed Price Cost Type Total Net Sales: Instrumentation $ 251.0 $ 5.5 $ 256.5 $ 234.1 $ 4.9 $ 239.0 Digital Imaging 213.3 22.0 235.3 191.2 19.8 211.0 Aerospace and Defense Electronics 180.1 0.3 180.4 173.4 0.2 173.6 Engineered Systems 18.2 54.8 73.0 23.2 48.8 72.0 $ 662.6 $ 82.6 $ 745.2 $ 621.9 $ 73.7 $ 695.6 First Quarter Ended March 31, 2019 First Quarter Ended April 1, 2018 Geographic Region (a) Geographic Region (a) (in millions) United States Europe All other Total United States Europe All other Total Net sales: Instrumentation $ 211.1 $ 33.6 $ 11.8 $ 256.5 $ 191.0 $ 39.4 $ 8.6 $ 239.0 Digital Imaging 72.4 70.3 92.6 235.3 56.8 67.0 87.2 211.0 Aerospace and Defense Electronics 165.1 15.1 0.2 180.4 154.1 18.8 0.7 173.6 Engineered Systems 71.2 1.8 — 73.0 70.2 1.8 — 72.0 $ 519.8 $ 120.8 $ 104.6 $ 745.2 $ 472.1 $ 127.0 $ 96.5 $ 695.6 a) Net sales by geographic region of origin.

General - Narrative (Details)

General - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)lease	Sep. 30, 2018USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassification of income tax effects for ASU 2018-02		$ 47.6
Number of operating leases | lease	120
Operating lease right-of-use assets	$ 134.3
Operating lease liability	144
Long-term operating lease liabilities	126
Short term lease liability	$ 18
Operating lease weighted average remaining term	10 years
Operating lease discount rate	4.09%
Operating lease expense	$ 5.8

General - Schedule of Lease Com

General - Schedule of Lease Commitments (Details) $ in Millions	Mar. 31, 2019USD ($)
Operating
2019	$ 22.5
2020	21
2021	19.3
2022	16.9
2023	15.6
Thereafter	79.9
Total minimum lease payments	175.2
Less:
Imputed interest	(31.2)
Current portion	(18)
Present value of minimum lease payments, net of current portion	$ 126

General - Schedule of Lease C_2

General - Schedule of Lease Commitments Prior to Adoption of Topic 842 (Details) $ in Millions	Dec. 30, 2018USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
2019	$ 23.2
2020	20.6
2021	18.4
2022	18.4
2023	11.8
Thereafter	48.2
Total minimum lease payments	$ 140.6

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Changes in AOCI by Component) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Jan. 01, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 2,229.7	$ 1,947.3
Other comprehensive income before reclassifications	20.3	14.5
Amounts reclassified from AOCI	3.1	5.4
Other comprehensive income	23.4	19.9
Cumulative effect of new accounting standards			$ 3.3
Ending balance	2,349.5	2,055.9
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(181.5)	(102)
Other comprehensive income before reclassifications	17	17.2
Amounts reclassified from AOCI	0	0
Other comprehensive income	17	17.2
Ending balance	(164.5)	(84.8)
Cash Flow Hedges and Other
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(4.9)	0.5
Other comprehensive income before reclassifications	3.3	(2.7)
Amounts reclassified from AOCI	(1.5)	1.1
Other comprehensive income	1.8	(1.6)
Ending balance	(3.1)	(1.1)
Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(306.8)	(227.8)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from AOCI	4.6	4.3
Other comprehensive income	4.6	4.3
Ending balance	(302.2)	(271.1)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(493.2)	(329.3)
Other comprehensive income	23.4	19.9
Cumulative effect of new accounting standards			(47.6)
Ending balance	$ (469.8)	$ (357)
Accounting Standards Update 2018-02 | Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect of new accounting standards			(47.6)
Accounting Standards Update 2018-02 | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect of new accounting standards			$ (47.6)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss (Reclassifications Out of Accumulated OCI) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
(Gain) loss on cash flow hedges:
(Gain) loss recognized in income on derivatives	$ 463.9	$ 438.2
Income tax impact	17.6	15.7
Total	(75.3)	(66.5)
Amortization of defined benefit pension and postretirement plan items:
Total	3.1	5.4
Cash Flow Hedges
Amortization of defined benefit pension and postretirement plan items:
Total	(1.5)	1.1
Prior Service Cost
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items:	(1.5)	(1.5)
Net Actuarial Loss
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items:	7.6	7.3
Pension and Postretirement Benefits
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items:	6.1	5.8
Income tax impact	(1.5)	(1.5)
Total	4.6	4.3
Amount Reclassified from AOCI | Cash Flow Hedges
(Gain) loss on cash flow hedges:
(Gain) loss recognized in income on derivatives	(2)	1.3
Income tax impact	0.5	(0.2)
Total	$ (1.5)	$ 1.1

Business Combinations, Goodwi_2

Business Combinations, Goodwill and Acquired Intangible Assets (Details) - USD ($) $ in Millions	Feb. 05, 2019	Mar. 31, 2019	Dec. 30, 2018
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired		$ 222.5
Goodwill		1,885.1	$ 1,735.2
Acquired intangibles, net		389	$ 344.3
Roper Technologies, Inc
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired	$ 225
Goodwill acquired during period		145.4
Intangible assets acquired during period		$ 52.4

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)	Apr. 01, 2018USD ($)	Mar. 31, 2019EUR (€)	Mar. 31, 2019USD ($)	Dec. 30, 2018USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Long-term debt				$ 857.5	$ 748.8
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments in hedges, at fair value				2
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Income (expense) related to derivative instruments not designated as cash flow hedges recognized in other income and expense	$ 1.6	$ (0.8)
Foreign Exchange Forward | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Expected reclassification of gain (loss) over the next 12 months				1.2
Foreign Exchange Forward | Designated as Hedging Instrument | Sell US Dollars and Buy Canadian Dollars
Derivative Instruments, Gain (Loss) [Line Items]
Amount of foreign currency contract				80.9
Currency Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Expected reclassification of gain (loss) over the next 12 months				(0.1)
Term Loan Due Oct 2019 | Term Loans
Derivative Instruments, Gain (Loss) [Line Items]
Long-term debt			€ 93	100
e2v Limited UK | Foreign Exchange Forward | Designated as Hedging Instrument | Sell US Dollars and Buy Great Britain Pounds
Derivative Instruments, Gain (Loss) [Line Items]
Amount of foreign currency contract				$ 17.4

Derivative Instruments (Effect

Derivative Instruments (Effect of Derivative Instruments) (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in AOCI	$ 4.3	$ (3.7)
Net foreign exchange gain (loss) recognized in other income and expense, net	(0.2)	0
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI	(0.6)	1.2
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI	0.8	0.5
Other Operating Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI	$ 1.8	$ (3)

Derivative Instruments (Foreign

Derivative Instruments (Foreign Currency Contracts) (Details) - Mar. 31, 2019 - Foreign Exchange Forward - Not Designated as Hedging Instrument € in Millions, ¥ in Millions, £ in Millions, kr in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	SGD ($)	HKD ($)	JPY (¥)	GBP (£)	EUR (€)	AUD ($)	DKK (kr)	USD ($)	CAD ($)
Long | Sell US Dollars and Buy Canadian Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract									$ 24.4
Long | Sell Euros and Buy Canadian Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract									$ 13.2
Long | Sell Australian Dollars and Buy Great Britain Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | £				£ 1.1
Long | Sell US Dollars and Buy Great Britain Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | £				33.1
Long | Sell US Dollars and Buy Singapore Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract	$ 2.3
Long | Sell US Dollars and Buy Euros
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | €					€ 31.2
Long | Sell Japanese Yen and Buy US Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract								$ 2.7
Long | Sell US Dollars And Buy Danish Krone
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | kr							kr 63
Long | Sell Euros and Buy Great British Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | £				7.3
Long | Sell Hong Kong Dollars and Buy Great British Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | £				£ 2.4
Short | Sell US Dollars and Buy Canadian Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract								18.5
Short | Sell Euros and Buy Canadian Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | €					8.7
Short | Sell Australian Dollars and Buy Great Britain Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract						$ 2.1
Short | Sell US Dollars and Buy Great Britain Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract								43.2
Short | Sell US Dollars and Buy Singapore Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract								1.7
Short | Sell US Dollars and Buy Euros
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract								35.1
Short | Sell Japanese Yen and Buy US Dollars
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | ¥			¥ 300
Short | Sell US Dollars And Buy Danish Krone
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract								$ 9.5
Short | Sell Euros and Buy Great British Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract | €					€ 8.5
Short | Sell Hong Kong Dollars and Buy Great British Pounds
Derivative Instruments (Textual) [Abstract]
Amount of foreign currency contract		$ 24.6

Derivative Instruments (Fair Va

Derivative Instruments (Fair Values of Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Fair values of derivative financial instruments
Total liability derivatives, net	$ (6.7)	$ (11.1)
Designated as Hedging Instrument
Fair values of derivative financial instruments
Total liability derivatives, net	(6.3)	(10.5)
Not Designated as Hedging Instrument
Fair values of derivative financial instruments
Total liability derivatives, net	(0.4)	(0.6)
Foreign Exchange Contract | Designated as Hedging Instrument | Other assets
Fair values of derivative financial instruments
Total liability derivatives, net	0.1	0
Foreign Exchange Contract | Designated as Hedging Instrument | Accrued liabilities
Fair values of derivative financial instruments
Total liability derivatives, net	(2.1)	(4.2)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Accrued liabilities
Fair values of derivative financial instruments
Total liability derivatives, net	(0.7)	(0.6)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other current assets
Fair values of derivative financial instruments
Total liability derivatives, net	0.3	0
Currency Swap | Designated as Hedging Instrument | Accrued liabilities
Fair values of derivative financial instruments
Total liability derivatives, net	$ (4.3)	$ (6.3)

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Earnings Per Share [Abstract]
Stock options excluded in computation of diluted earnings per share (in shares)	6,480	370,583

Earnings Per Share (Computation

Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Earnings Per Share [Abstract]
Weighted average basic common shares outstanding (in shares)	36.1	35.6
Effect of dilutive securities (primarily stock options) (in shares)	1.1	1.2
Weighted average diluted common shares outstanding (in shares)	37.2	36.8

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense	$ 8.9	$ 4.9
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in USD per share)	$ 72
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	8,586	6,481
Shares available for grant (in shares)	15,578
Performance measurement period		3 years
Employee | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period over which employee stock option grants are evenly expensed	3 years
Scenario, Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock option compensation expense			$ 26.6
Maximum | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)	58,729

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Stock Option Valuation Assumptions) (Details)	3 Months Ended
	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	26.70%
Expected life in years	6 years 6 months 30 days
Expected dividend yield	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate range	2.47%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate range	2.70%

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans (Options Plans) (Details) - Stock Options	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Shares
Beginning balance (in shares) | shares	2,064,740
Granted (in shares) | shares	390,789
Exercised (in shares) | shares	(120,783)
Canceled (in shares) | shares	(17,223)
Ending balance (in shares) | shares	2,317,523
Options exercisable at end of period (in shares) | shares	1,549,179
Weighted Average Exercise Price
Beginning balance (in USD per share) | $ / shares	$ 104.66
Granted (in USD per share) | $ / shares	217.58
Exercised (in USD per share) | $ / shares	84.76
Canceled (in USD per share) | $ / shares	171.49
Ending balance (in USD per share) | $ / shares	124.24
Options exercisable at end of period (in USD per share) | $ / shares	$ 79.52

Stock-Based Compensation Plan_5

Stock-Based Compensation Plans (Restricted Stock Activity) (Details) - Restricted Stock	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Shares
Beginning balance (in shares) | shares	74,220,000
Granted (in shares) | shares	17,522,000
Vested (in shares) | shares	(35,330,000)
Ending balance (in shares) | shares	56,412,000
Weighted average fair value per share
Beginning balance (in USD per share) | $ / shares	$ 108.05
Granted (in USD per share) | $ / shares	200
Vested (in USD per share) | $ / shares	72.91
Ending balance (in USD per share) | $ / shares	$ 158.62

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Inventory Disclosure [Abstract]
Inventories at average cost or FIFO methods	$ 360.2	$ 331.3
Inventories at cost as per LIFO	$ 41.9	$ 42.3

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Inventories
Raw materials and supplies	$ 221.1	$ 205.6
Work in process	125.4	117.5
Finished goods	55.6	50.5
Total inventories, gross	402.1	373.6
Reduction to LIFO cost basis	(9.1)	(9.3)
Total inventories, net	$ 393	$ 364.3

Disclosures for Customer Cont_2

Disclosures for Customer Contracts - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Revenue from Contract with Customer [Abstract]
Change in estimate	$ 2.8	$ 0.2
Contract with customer, current liability	111.2		$ 111.5
Contract with customer, noncurrent liability	20.5		$ 15.3
Revenue recognized from contract liabilities	35.4
Remaining performance obligation	$ 1,760

Disclosures for Customer Cont_3

Disclosures for Customer Contracts - Performance Obligation (Details)	Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	79.00%
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	21.00%
Remaining performance obligation, expected timing of satisfaction

Disclosures for Customer Cont_4

Disclosures for Customer Contracts - (Product Warranty) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Company's product warranty reserve
Balance at beginning of year	$ 21	$ 21.1
Accruals for product warranties charged to expense	2.2	3.1
Cost of product warranty claims	(2.9)	(2.2)
Acquisition	0.3	0
Balance at end of period	$ 20.6	$ 22

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	18.90%	19.10%
Discrete items	$ 3.1	$ 2.1
Discrete tax expense (benefit), share-based accounting	$ 2.9	$ 3

Long-Term Debt and Letters of_3

Long-Term Debt and Letters of Credit - Long-Term Debt (Details)	Mar. 31, 2019EUR (€)	Mar. 31, 2019USD ($)	Dec. 30, 2018USD ($)
Debt Instrument [Line Items]
Total debt		$ 857,500,000	$ 748,800,000
Less: current portion of long-term debt and debt issuance costs		(132,900,000)	(138,700,000)
Long-term debt		724,600,000	610,100,000
Other debt
Debt Instrument [Line Items]
Total debt		3,000,000	$ 8,800,000
Credit facility | $750.0 million credit facility due March 2024, weighted average rate of 3.45% at March 31, 2019 and 5.50% at December 30, 2018
Debt Instrument [Line Items]
Maximum borrowing capacity		750,000,000
Additional borrowing capacity		$ 250,000,000
Weighted average interest rate	3.45%	3.45%	5.50%
Line of credit facility, current borrowing capacity			$ 750,000,000
Total debt		$ 149,000,000	$ 29,000,000
Term Loans | Term loan due October 2019, variable rate of 3.61% at March 31, 2019 and 3.63% at December 30, 2018, swapped to a Euro fixed rate of 0.7055%
Debt Instrument [Line Items]
Stated interest rate	0.7055%	0.7055%
Effective interest rate	3.61%	3.61%	3.63%
Total debt		$ 100,000,000	$ 100,000,000
Senior Notes | 2.61% Fixed Rate Senior Notes due December 2019
Debt Instrument [Line Items]
Stated interest rate	2.61%	2.61%
Total debt		$ 30,000,000	30,000,000
Senior Notes | 5.30% Fixed Rate Senior Notes due September 2020
Debt Instrument [Line Items]
Stated interest rate	5.30%	5.30%
Total debt		$ 75,000,000	75,000,000
Senior Notes | 2.81% Fixed Rate Senior Notes due November 2020
Debt Instrument [Line Items]
Stated interest rate	2.81%	2.81%
Total debt		$ 25,000,000	25,000,000
Senior Notes | 3.09% Fixed Rate Senior Notes due December 2021
Debt Instrument [Line Items]
Stated interest rate	3.09%	3.09%
Total debt		$ 95,000,000	95,000,000
Senior Notes | 3.28% Fixed Rate Senior Notes due November 2022
Debt Instrument [Line Items]
Stated interest rate	3.28%	3.28%
Total debt		$ 100,000,000	100,000,000
Senior Notes | 0.70% €50 Million Fixed Rate Senior Notes due April 2022
Debt Instrument [Line Items]
Stated interest rate	0.70%	0.70%
Debt instrument, face amount (in eur) | €	€ 50,000,000
Total debt		$ 56,100,000	57,200,000
Senior Notes | 0.92% €100 Million Fixed Rate Senior Notes due April 2023
Debt Instrument [Line Items]
Stated interest rate	0.92%	0.92%
Debt instrument, face amount (in eur) | €	€ 100,000,000
Total debt		$ 112,200,000	114,400,000
Senior Notes | 1.09% €100 Million Fixed Rate Senior Notes due April 2024
Debt Instrument [Line Items]
Stated interest rate	1.09%	1.09%
Debt instrument, face amount (in eur) | €	€ 100,000,000
Total debt		$ 112,200,000	$ 114,400,000

Long-Term Debt and Letters of_4

Long-Term Debt and Letters of Credit - Credit Facility and Capital Lease (Details)	Mar. 31, 2019USD ($)
Letter of Credit
Line of Credit Facility [Line Items]
Letters of credit, outstanding	$ 34,700,000
Credit facility | $750.0 million credit facility due March 2024, weighted average rate of 3.45% at March 31, 2019 and 5.50% at December 30, 2018
Line of Credit Facility [Line Items]
Maximum borrowing capacity	750,000,000
Credit facility | Letter of Credit
Line of Credit Facility [Line Items]
Available borrowings capacity under letters of credit	$ 571,200,000

Lawsuits, Claims, Commitments_2

Lawsuits, Claims, Commitments, Contingencies and Related Matters (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 30, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Reserves for environmental remediation obligations	$ 6.4
Accrued liabilities	$ 364.6	$ 355.6
Accrual for environmental loss contingencies		$ 6
Maximum
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Estimated duration of remediation	30 years
Environmental Reserves
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accrued liabilities	$ 1.5

Pension Plans and Postretirem_3

Pension Plans and Postretirement Benefits (Narrative) (Details) - USD ($)	Mar. 31, 2019	Dec. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions in current fiscal year	$ 0
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to determine the benefit obligation	4.59%	4.02%

Pension Plans and Postretirem_4

Pension Plans and Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Pension Plan
Components of net period pension benefit expense
Service cost — benefits earned during the period	$ 2.4	$ 2.7
Interest cost on benefit obligation	8.4	8.1
Expected return on plan assets	(16.5)	(17.9)
Amortization of prior service cost	(1.5)	(1.5)
Amortization of net actuarial loss	7.7	7.9
Curtailment/settlements	(0.3)	0
Net periodic (income) expense	(2.2)	(3.4)
Other Postretirement Benefits Plan
Components of net period pension benefit expense
Interest cost on benefit obligation	0.1	0.1
Amortization of net actuarial loss	0	(0.1)
Net periodic (income) expense	$ 0.1	$ 0

Segment Information (Narrative)

Segment Information (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)segmentproduct_line	Apr. 01, 2018USD ($)
Revenue from External Customer [Line Items]
Number of reportable segments | segment	4
Net sales	$ 745.2	$ 695.6
Aerospace and Defense Electronics
Revenue from External Customer [Line Items]
Net sales	$ 180.4	173.6
Number of Product Lines | product_line	1
Engineered Systems
Revenue from External Customer [Line Items]
Net sales	$ 73	72
Instrumentation
Revenue from External Customer [Line Items]
Net sales	$ 256.5	239
Number of Product Lines | product_line	3
Digital Imaging
Revenue from External Customer [Line Items]
Net sales	$ 235.3	$ 211

Segment Information (Reconcilia

Segment Information (Reconciliation) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)product_line	Apr. 01, 2018USD ($)
Net sales:
Net sales	$ 745.2	$ 695.6
Net sales, percentage change	7.10%
Operating income:
Operating income	$ 97.3	88.4
Total segment operating profit, percentage change	10.10%
Corporate, Non-Segment
Operating income:
Operating income	$ (18.1)	(12.9)
Total segment operating profit, percentage change	40.30%
Intersegment Eliminations
Net sales:
Net sales	$ 6.4	5.2
Instrumentation
Segment Reporting Information [Line Items]
Number of Product Lines | product_line	3
Net sales:
Net sales	$ 256.5	239
Instrumentation | Operating Segments
Net sales:
Net sales	$ 256.5	239
Net sales, percentage change	7.30%
Operating income:
Operating income	$ 39.9	27.8
Total segment operating profit, percentage change	43.50%
Digital Imaging
Net sales:
Net sales	$ 235.3	211
Digital Imaging | Operating Segments
Net sales:
Net sales	$ 235.3	211
Net sales, percentage change	11.50%
Operating income:
Operating income	$ 37	34.6
Total segment operating profit, percentage change	6.90%
Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Number of Product Lines | product_line	1
Net sales:
Net sales	$ 180.4	173.6
Aerospace and Defense Electronics | Operating Segments
Net sales:
Net sales	$ 180.4	173.6
Net sales, percentage change	3.90%
Operating income:
Operating income	$ 33.8	31.7
Total segment operating profit, percentage change	6.60%
Engineered Systems
Net sales:
Net sales	$ 73	72
Engineered Systems | Operating Segments
Net sales:
Net sales	$ 73	72
Net sales, percentage change	1.40%
Operating income:
Operating income	$ 4.7	$ 7.2
Total segment operating profit, percentage change	(34.70%)

Segment Information (Identifiab

Segment Information (Identifiable Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Segment Reporting Information [Line Items]
Identifiable assets	$ 4,161.7	$ 3,809.3
Operating Segments | Instrumentation
Segment Reporting Information [Line Items]
Identifiable assets	1,422.2	1,392.7
Operating Segments | Digital Imaging
Segment Reporting Information [Line Items]
Identifiable assets	1,832.2	1,600.9
Operating Segments | Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Identifiable assets	597.4	521.4
Operating Segments | Engineered Systems
Segment Reporting Information [Line Items]
Identifiable assets	117.6	116.6
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Identifiable assets	$ 192.3	$ 177.7

Segment Information (Sales) (De

Segment Information (Sales) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Revenue from External Customer [Line Items]
Net sales	$ 745.2	$ 695.6
Instrumentation
Revenue from External Customer [Line Items]
Net sales	256.5	239
Operating Segments | Instrumentation
Revenue from External Customer [Line Items]
Net sales	256.5	239
Operating Segments | Instrumentation | Marine Instrumentation
Revenue from External Customer [Line Items]
Net sales	105.2	104.2
Operating Segments | Instrumentation | Environmental Instrumentation
Revenue from External Customer [Line Items]
Net sales	86.4	81.2
Operating Segments | Instrumentation | Test and Measurement Instrumentation
Revenue from External Customer [Line Items]
Net sales	$ 64.9	$ 53.6

Segment Information (Disaggrega

Segment Information (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 745.2	$ 695.6
United States
Disaggregation of Revenue [Line Items]
Net sales	519.8	472.1
Europe
Disaggregation of Revenue [Line Items]
Net sales	120.8	127
All other
Disaggregation of Revenue [Line Items]
Net sales	104.6	96.5
Fixed Price
Disaggregation of Revenue [Line Items]
Net sales	662.6	621.9
Cost Type
Disaggregation of Revenue [Line Items]
Net sales	82.6	73.7
US Government
Disaggregation of Revenue [Line Items]
Net sales	169.9	159.5
Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	575.3	536.1
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	256.5	239
Instrumentation | United States
Disaggregation of Revenue [Line Items]
Net sales	211.1	191
Instrumentation | Europe
Disaggregation of Revenue [Line Items]
Net sales	33.6	39.4
Instrumentation | All other
Disaggregation of Revenue [Line Items]
Net sales	11.8	8.6
Instrumentation | Fixed Price
Disaggregation of Revenue [Line Items]
Net sales	251	234.1
Instrumentation | Cost Type
Disaggregation of Revenue [Line Items]
Net sales	5.5	4.9
Instrumentation | US Government
Disaggregation of Revenue [Line Items]
Net sales	14.2	12.8
Instrumentation | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	242.3	226.2
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	235.3	211
Digital Imaging | United States
Disaggregation of Revenue [Line Items]
Net sales	72.4	56.8
Digital Imaging | Europe
Disaggregation of Revenue [Line Items]
Net sales	70.3	67
Digital Imaging | All other
Disaggregation of Revenue [Line Items]
Net sales	92.6	87.2
Digital Imaging | Fixed Price
Disaggregation of Revenue [Line Items]
Net sales	213.3	191.2
Digital Imaging | Cost Type
Disaggregation of Revenue [Line Items]
Net sales	22	19.8
Digital Imaging | US Government
Disaggregation of Revenue [Line Items]
Net sales	26.2	22.4
Digital Imaging | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	209.1	188.6
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	180.4	173.6
Aerospace and Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Net sales	165.1	154.1
Aerospace and Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Net sales	15.1	18.8
Aerospace and Defense Electronics | All other
Disaggregation of Revenue [Line Items]
Net sales	0.2	0.7
Aerospace and Defense Electronics | Fixed Price
Disaggregation of Revenue [Line Items]
Net sales	180.1	173.4
Aerospace and Defense Electronics | Cost Type
Disaggregation of Revenue [Line Items]
Net sales	0.3	0.2
Aerospace and Defense Electronics | US Government
Disaggregation of Revenue [Line Items]
Net sales	68	65.3
Aerospace and Defense Electronics | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	112.4	108.3
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	73	72
Engineered Systems | United States
Disaggregation of Revenue [Line Items]
Net sales	71.2	70.2
Engineered Systems | Europe
Disaggregation of Revenue [Line Items]
Net sales	1.8	1.8
Engineered Systems | All other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Engineered Systems | Fixed Price
Disaggregation of Revenue [Line Items]
Net sales	18.2	23.2
Engineered Systems | Cost Type
Disaggregation of Revenue [Line Items]
Net sales	54.8	48.8
Engineered Systems | US Government
Disaggregation of Revenue [Line Items]
Net sales	61.5	59
Engineered Systems | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	$ 11.5	$ 13

Uncategorized Items - tdy-20190

Label	Element	Value
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 50,900,000