Trimble (TRMB) 10-K 27 Feb 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 29, 2017	Feb. 22, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 29, 2017
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2,017
Entity Registrant Name	TRIMBLE INC.
Entity Central Index Key	864,749
Current Fiscal Year End Date	--12-29
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		248,266,451
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 9
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
ASSETS
Cash and cash equivalents	$ 358.5	$ 216.1
Short-term investments	178.9	111.1
Accounts receivable, net	414.8	354.8
Other receivables	42.8	35.4
Inventories	271.8	218.8
Other current assets	50.3	42.5
Total current assets	1,317.1	978.7
Property and equipment, net	174	144.2
Goodwill	2,287.1	2,077.6
Other purchased intangible assets, net	364.8	333.3
Other non-current assets	155.2	140
Total assets	4,298.2	3,673.8
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term debt	128.4	130.3
Accounts payable	146.1	109.8
Accrued compensation and benefits	143	97.5
Deferred revenue	272.4	246.5
Accrued warranty expense	18.3	17.2
Other current liabilities	101	86.9
Total current liabilities	809.2	688.2
Long-term debt	785.5	489.6
Non-current deferred revenue	41	37.7
Deferred income tax liabilities	40.4	38.8
Income taxes payable	94.1
Other non-current liabilities	162	113.8
Total liabilities	1,932.2	1,368.1
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value; 3.0 shares authorized; none issued and outstanding	0	0
Common stock, $0.001 par value; 360.0 shares authorized; 248.9 and 251.3 shares issued and outstanding at the end of fiscal 2017 and 2016, respectively	0.2	0.3
Additional paid-in-capital	1,461.1	1,348.3
Retained earnings	1,035.9	1,177.1
Accumulated other comprehensive loss	(131.2)	(219.9)
Total Trimble Inc. stockholders’ equity	2,366	2,305.8
Noncontrolling interests	0	(0.1)
Total stockholders' equity	2,366	2,305.7
Total liabilities and stockholders’ equity	$ 4,298.2	$ 3,673.8

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 29, 2017	Dec. 30, 2016
Preferred Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred Stock, Shares Issued	0	0
Preferred stock, shares outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Common Stock, Shares Authorized	360,000,000	360,000,000
Common stock, shares issued	248,900,000	251,300,000
Common stock, shares outstanding	248,900,000	251,300,000

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Income Statement [Abstract]
Product		$ 1,763.8	$ 1,562	$ 1,533.5
Service		461.6	430.2	419.9
Subscription		428.8	370	337
Total revenues	[1]	2,654.2	2,362.2	2,290.4
Product		866.5	760.8	731.1
Service		196.3	169.9	164.2
Subscription		113	104.9	100.3
Amortization of purchased intangible assets		85.8	88.6	92.6
Total cost of sales		1,261.6	1,124.2	1,088.2
Gross margin		1,392.6	1,238	1,202.2
Operating expense
Research and development		370.2	349.6	336.7
Sales and marketing		404.2	377.6	374.6
General and administrative		302.3	256	255.3
Restructuring charges		6.9	11.6	11.4
Amortization of purchased intangible assets		63	62.2	69.8
Total operating expense		1,146.6	1,057	1,047.8
Operating income		246	181	154.4
Non-operating income (expense), net
Interest expense, net		(25)	(25.9)	(25.6)
Foreign currency transaction gain (loss), net		3.3	(1.9)	0.2
Income from equity method investments, net		29.5	17.6	17.9
Other income, net		5.3	5.9	4.9
Total non-operating income (expense), net		13.1	(4.3)	(2.6)
Income before taxes		259.1	176.7	151.8
Income tax provision		137.9	44.5	31.1
Net income		121.2	132.2	120.7
Net gain (loss) attributable to noncontrolling interests		0.1	(0.2)	(0.4)
Net income attributable to Trimble Inc.		$ 121.1	$ 132.4	$ 121.1
Basic earnings per share		$ 0.48	$ 0.53	$ 0.47
Shares used in calculating basic earnings per share		252.1	250.5	255.8
Diluted earnings per share		$ 0.47	$ 0.52	$ 0.47
Shares used in calculating diluted earnings per share		256.7	253.9	258.5
[1]	Revenue is attributed to countries based on the location of the customer.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Net income	$ 121.2	$ 132.2	$ 120.7
Foreign currency translation adjustments, net of tax $3.7 in 2017, $(0.2) in 2016, and $(4.3) in 2015	89.2	(53.4)	(90.2)
Net unrealized loss on short-term investments	(0.2)
Net unrealized actuarial gain (loss), net of tax	(0.3)	0.3	0.1
Comprehensive income	209.9	79.1	30.6
Comprehensive gain (loss) attributable to noncontrolling interests	0.1	(0.2)	(0.4)
Comprehensive income attributable to Trimble Inc.	$ 209.8	$ 79.3	$ 31

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Supplemental Income Statement Elements [Abstract]
Foreign currency translation adjustments, net of tax $3.7 in 2017, $(0.2) in 2016, and $(4.3) in 2015	$ 3.7	$ (0.2)	$ (4.3)

Consolidated Statements Of Shar

Consolidated Statements Of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance at Jan. 02, 2015	$ 2,353.4	$ 0.3	$ 1,207	$ 1,211	$ (76.7)	$ 2,341.6	$ 11.8
Balance, shares at Jan. 02, 2015		259.2
Net income	120.7			121.1		121.1	(0.4)
Net gain (loss) attributable to noncontrolling interests	(0.4)
Other comprehensive loss	(90.1)				(90.1)	(90.1)
Comprehensive income	30.6					31
Issuance of common stock under employee plans, net of tax withholding - Shares		2.7
Issuance of common stock under employee plans, net of tax withholdings	29.7		33.3			29.7
Adjustments Related to Tax Withholding for Share-based Compensation				(3.6)
Stock Repurchase, Shares		(11.2)
Stock repurchase	(234.4)		(54.1)	(180.3)		(234.4)
Stock based compensation	50.9		50.9			50.9
Noncontrolling interest investments, Increase	(10.5)		0			0	(10.5)
Tax benefit from stock option exercises	0.9		0.9			0.9
Balance at Jan. 01, 2016	2,220.6	$ 0.3	1,238	1,148.2	(166.8)	2,219.7	0.9
Balance, shares at Jan. 01, 2016		250.7
Net income	132.2			132.4		132.4	(0.2)
Net gain (loss) attributable to noncontrolling interests	(0.2)
Other comprehensive loss	(53.1)				(53.1)	(53.1)
Comprehensive income	79.1					79.3
Issuance of common stock under employee plans, net of tax withholding - Shares		5.5
Issuance of common stock under employee plans, net of tax withholdings	67.9		76.7			67.9
Adjustments Related to Tax Withholding for Share-based Compensation				(8.8)
Stock Repurchase, Shares		(4.9)
Stock repurchase	(119.5)		(24.8)	(94.7)		(119.5)
Stock based compensation	53.2		53.2			53.2
Noncontrolling interest investments, Increase	0		(0.8)			0.8	(0.8)
Tax benefit from stock option exercises	4.4		4.4			4.4
Balance at Dec. 30, 2016	$ 2,305.7	$ 0.3	1,348.3	1,177.1	(219.9)	2,305.8	(0.1)
Balance, shares at Dec. 30, 2016	251.3	251.3
Net income	$ 121.2			121.1		121.1
Net gain (loss) attributable to noncontrolling interests	0.1						0.1
Other comprehensive loss	88.7				88.7	88.7
Comprehensive income	209.9					209.8
Issuance of common stock under employee plans, net of tax withholding - Shares		5
Issuance of common stock under employee plans, net of tax withholdings	73.3		90			73.3
Adjustments Related to Tax Withholding for Share-based Compensation				(16.7)
Stock Repurchase, Shares		(7.4)
Stock repurchase	(288.3)	$ (0.1)	(42.2)	(246)		(288.3)
Stock based compensation	65		65			65
Noncontrolling interest investments, Increase	0					0	0
Tax benefit from stock option exercises	0.4		0	0.4		0.4
Balance at Dec. 29, 2017	$ 2,366	$ 0.2	$ 1,461.1	$ 1,035.9	$ (131.2)	$ 2,366	$ 0
Balance, shares at Dec. 29, 2017	248.9	248.9

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Cash flows from operating activities:
Net income	$ 121.2	$ 132.2	$ 120.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	34.6	37	36.7
Amortization expense	148.8	150.8	162.4
Provision for doubtful accounts	1.2	3	1.9
Deferred income taxes	1.4	0.4	0.9
Stock-based compensation	64.8	52.6	50.1
Income from equity method investments	(29.5)	(17.6)	(17.9)
Divestitures gain, net	(6.4)	(3.5)	(3.9)
Provision for excess and obsolete inventories	5.5	15.8	12.3
Other non-cash items	5.2	3.3	10
Add decrease (increase) in assets:
Accounts receivable	(41.6)	1.2	0.3
Other receivables	3.6	1.4	8.5
Inventories	(38.7)	24	(2.9)
Other current and non-current assets	(19.1)	(1.2)	(7.6)
Add increase (decrease) in liabilities:
Accounts payable	25.9	10.9	(6.4)
Accrued compensation and benefits	33.7	0.6	(0.1)
Deferred revenue	16.4	26.1	28.1
Accrued warranty expense	0.6	(1.1)	(2)
Income taxes payable	88.2	(16.1)	(30.4)
Accrued liabilities	(3.9)	(6.2)	(3.7)
Net cash provided by operating activities	411.9	413.6	357
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(293.1)	(38.8)	(156.3)
Acquisitions of property and equipment	(43.7)	(26)	(43.9)
Purchases of equity method investments	0	(1.5)	(5.5)
Purchases of short-term investments	(288)	(113.3)	0
Proceeds from maturities of short-term investments	122.1	2.4	0
Proceeds from sales of short-term investments	97.7	0	0
Net proceeds from sales of businesses	20.1	14.4	12.1
Dividends received from equity method investments	18.1	17.6	20
Other	0.8	0.8	1.2
Net cash used in investing activities	(366)	(144.4)	(172.4)
Cash flows from financing activities:
Issuance of common stock, net of tax withholdings	73.8	67.5	29.7
Repurchases of common stock	(285.3)	(119.5)	(234.4)
Proceeds from debt and revolving credit lines	786	355	555
Payments on debt and revolving credit lines	(495.4)	(465.3)	(555.2)
Net cash provided by (used in) financing activities	79.1	(162.3)	(204.9)
Effect of exchange rate changes on cash and cash equivalents	17.4	(6.8)	(11.7)
Net increase (decrease) in cash and cash equivalents	142.4	100.1	(32)
Cash and cash equivalents, beginning of fiscal year	216.1	116	148
Cash and cash equivalents, end of fiscal year	$ 358.5	$ 216.1	$ 116

Description Of Business

Description Of Business	12 Months Ended
	Dec. 29, 2017
Description Of Business [Abstract]
Description Of Business	DESCRIPTION OF BUSINESS The Company began operations in 1978 and was originally incorporated in California as Trimble Navigation Limited in 1981. On October 1, 2016, Trimble Navigation Limited changed its name to Trimble Inc. ("Trimble" or the "Company") and changed its state of incorporation from the State of California to the State of Delaware. Other than the change in corporate domicile, the reincorporation did not result in any change in the business, physical location, management, assets, liabilities or total stockholders' equity of the Company, nor did it result in any change in location of the Company's employees, including the Company's management. Trimble is a leading provider of technology solutions that enable professionals and field mobile workers to improve or transform their work processes. Trimble's solutions are used across a range of industries including agriculture, architecture, civil engineering, survey and land administration, construction, geospatial, government, natural resources, transportation, and utilities. Representative Trimble customers include engineering and construction firms, contractors, surveying companies, farmers and agricultural companies, transportation and logistics companies, energy, utility companies, and state, federal and municipal governments. Trimble focuses on integrating broad technological and application capabilities to create system-level solutions that transform how work is done within the industries the Company serves. Products are sold based on return on investment and provide benefits such as lower operational costs, higher productivity, improved quality, enhanced safety and regulatory compliance, and reduced environmental impact. Representative products include equipment that automates large industrial equipment such as tractors and bulldozers; integrated systems that track fleets of vehicles and workers and provide real-time information and powerful analytics to the back-office; data collection systems that enable the management of large amounts of geo-referenced information; software solutions that connect all aspects of a construction site or a farm; and building information modeling ("BIM") software that is used throughout the design, build, and operation of buildings.

Accounting Policies

Accounting Policies	12 Months Ended
	Dec. 29, 2017
Accounting Policies [Abstract]
Accounting Policies	ACCOUNTING POLICIES Use of Estimates The preparation of financial statements in accordance with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Estimates are used for allowances for doubtful accounts, sales returns reserve, allowances for inventory valuation, warranty costs, investments, goodwill impairment, intangibles impairment, purchased intangibles, stock-based compensation, and income taxes among others. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management’s best knowledge of current events and actions that may impact the company in the future, actual results may differ materially from management’s estimates. Basis of Presentation The Company has a 52-53 week fiscal year, ending on the Friday nearest to December 31. Fiscal 2017 , 2016 and 2015 were all 52-week years, and ended on December 29, 2017 , December 30, 2016 and January 1, 2016 , respectively. Unless otherwise stated, all dates refer to the Company’s fiscal year. These consolidated financial statements include the results of the Company and its consolidated subsidiaries. Inter-company accounts and transactions have been eliminated. Noncontrolling interests represent the noncontrolling stockholders’ proportionate share of the net assets and results of operations of the Company’s consolidated subsidiaries. The Company has presented revenue and cost of sales separately for products, service and subscriptions. Product revenue includes hardware, software licenses, parts and accessories; service revenue includes maintenance and support for hardware and software products, training and professional services; subscription revenue includes software as a service ("SaaS"). Certain immaterial amounts from prior periods have been reclassified to conform to the current period presentation, including certain line items within the Consolidated Statements of Cash Flows, due to the adoption of accounting for certain aspects of the share-based payments awards, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements. Reportable Segments In March 2017, the Company effected a change in its financial reporting segments to better reflect the Company’s customer base and end markets. Over time, the Company has experienced growth both organically and through strategic business acquisitions, resulting in an increasingly diversified business model. As a result of the Company’s evolution, Trimble’s chief operating decision maker (its Chief Executive Officer) changed the information he regularly reviews to allocate resources and assess performance. Beginning with the first quarter of fiscal 2017, the Company is reporting its financial performance, including revenues and operating income, based on four new reportable segments: Buildings and Infrastructure, Geospatial, Resources and Utilities, and Transportation. Comparative period financial information by reportable segment has been recast to conform with the current presentation. See Note 6 of the Notes to consolidated financial statements for further information. Foreign Currency Translation Assets and liabilities of non-U.S. subsidiaries that operate in local currencies are translated to U.S. dollars at exchange rates in effect at the balance sheet date, with the resulting translation adjustments, net of tax, recorded in Accumulated other comprehensive loss within the stockholders’ equity section of the Consolidated Balance Sheets. Income and expense accounts are translated at average monthly exchange rates during the year. Derivative Financial Instruments The Company enters into foreign exchange forward contracts to minimize the short-term impact of foreign currency fluctuations on cash, certain trade and inter-company receivables and payables, primarily denominated in Euro, British pound, New Zealand dollars and Canadian dollars. These contracts reduce the exposure to fluctuations in exchange rate movements as the gains and losses associated with foreign currency balances are generally offset with the gains and losses on the forward contracts. These instruments are marked to market through earnings every period and generally range from one to two months in original maturity. The Company occasionally enters into foreign exchange forward contracts to hedge the purchase price of some of its larger business acquisitions. The Company does not enter into foreign exchange forward contracts for trading purposes. As of the fiscal years ended 2017 and 2016 , there were no derivative financial instruments outstanding that were accounted for as hedges. Cash, Cash Equivalents and Short-Term Investments The Company's cash equivalents and short-term investments consisted primarily of treasury bills, debt securities and commercial paper, interest and non-interest bearing bank deposits as well as bank time deposits. The Company classifies all investments that are considered readily convertible to known amounts of cash and have stated maturities of three months or less from the date of purchase as cash equivalents and those with stated maturities of greater than three months as short-term investments based on the nature of the investments and their availability for use in current operations. The Company has classified and accounted for such investments in cash equivalents and short-term investments as available-for-sale securities. The carrying amount of cash and cash equivalents approximates fair value because of the short maturity of those instruments. The Company determines the appropriate classification of its short-term investments at the time of purchase and reevaluates such designation at each balance sheet date. These investments are carried at fair value, and any unrealized gains and losses, net of taxes, are reported in Accumulated other comprehensive loss, except for unrealized losses determined to be other-than-temporary, which would be recorded within Other income, net. The Company has not recorded any such impairment charge in the fiscal year 2017 . Realized gains or losses on the sale of marketable securities are determined on a specific identification method, and such gains and losses are recorded as a component of Other income, net. Concentrations of Risk The Company is subject to concentrations of credit risk primarily from cash and cash equivalents, short-term investments and accounts receivable. The Company's cash equivalents and short-term investments consisted primarily of treasury bills, debt securities and commercial paper, interest and non-interest bearing bank deposits as well as bank time deposits. The main objective of these instruments is safety of principal and liquidity while maximizing return, without significantly increasing risk. Deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions of reputable credit and therefore bear minimal credit risk. The Company's investment policy requires the portfolio to include only securities with high credit quality and a weighted average maturity not to exceed six months, with the main objective of preserving capital and maintaining liquidity. The Company maintains an investment portfolio of various holdings, types, and maturities. The Company is also exposed to credit risk in the Company’s trade receivables, which are derived from sales to end-user customers in diversified industries as well as various resellers. The Company performs ongoing credit evaluations of its customers’ financial condition and limits the amount of credit extended when deemed necessary but generally does not require collateral. With Flex Ltd. as an exclusive manufacturing partner for many of its products, the Company is dependent upon a sole supplier for the manufacture of these products. In addition, the Company relies on sole suppliers for a number of its critical components. Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The allowance for doubtful accounts was $3.6 million and $5.0 million at the end of fiscal 2017 and 2016 , respectively. The sales return reserve was $4.2 million and $3.6 million at the end of fiscal 2017 and 2016 , respectively. The Company evaluates the ongoing collectibility of its trade accounts receivable based on a number of factors such as age of the accounts receivable balances, credit quality, historical experience, and current economic conditions that may affect a customer’s ability to pay. In circumstances where the Company is aware of a specific customer’s inability to meet its financial obligations to the Company, a specific allowance for bad debts is estimated and recorded which reduces the recognized receivable to the estimated amount that the Company believes will ultimately be collected. In addition to specific customer identification of potential bad debts, bad debt charges are recorded based on the Company’s recent past loss history and an overall assessment of past due trade accounts receivable amounts outstanding. Inventories Inventories are stated at the lower of cost or net realizable value. Adjustments are also made to reduce the cost of inventory for estimated excess or obsolete balances. Factors influencing these adjustments include declines in demand which impact inventory purchasing forecasts, technological changes, product life cycle and development plans, component cost trends, product pricing, physical deterioration and quality issues. If the Company's estimates used to reserve for excess and obsolete inventory are different from what it expected, the Company may be required to recognize additional reserves, which would negatively impact its gross margin. Property and Equipment, Net Property and equipment, net is stated at cost less accumulated depreciation. Depreciation of property and equipment is computed using the straight-line method over the shorter of the estimated useful lives or the lease terms when applicable. Useful lives generally include a range from four to six years for machinery and equipment, five to seven years for furniture and fixtures, two to five years for computer equipment and software, thirty-nine years for buildings, and the life of the lease for leasehold improvements. The Company capitalizes eligible costs to acquire or develop internal-use software that are incurred subsequent to the preliminary project stage. Capitalized costs related to internal-use software are amortized using the straight-line method over the estimated useful lives of the assets, which range generally from two to five years. The costs of repairs and maintenance are expensed when incurred, while expenditures for refurbishments and improvements that significantly add to the productive capacity or extend the useful life of an asset are capitalized. Depreciation expense was $34.6 million in fiscal 2017 , $37.0 million in fiscal 2016 and $36.7 million in fiscal 2015 . Lease Obligations The Company enters into lease arrangements for office space, facilities, and equipment under non-cancelable capital and operating leases. Certain of the operating lease agreements contain rent holidays, rent escalation provisions, and purchase options. Rent holidays and rent escalation provisions are considered in determining the straight-line rent expense to be recorded over the lease term. The lease term begins on the date of initial possession of the leased property for purposes of recognizing lease expense on a straight-line basis over the term of the lease. The Company does not assume renewals in its determination of the lease term unless the renewals are deemed to be reasonably assured at lease inception. Business Combinations The Company allocates the fair value of purchase consideration to the assets acquired, liabilities assumed, and non-controlling interests in the acquiree based on their fair values at the acquisition date. The excess of the fair value of purchase consideration over the fair value of these assets acquired, liabilities assumed and non-controlling interests in the acquiree is recorded as goodwill. When determining the fair values of assets acquired, liabilities assumed, and non-controlling interests in the acquiree, management makes significant estimates and assumptions, especially with respect to intangible assets. Critical estimates in valuing intangible assets include, but are not limited to, expected future cash flows, which includes consideration of future growth rates and margins, customer attrition rates, future changes in technology and brand awareness, loyalty and position, and discount rates. Fair value estimates are based on the assumptions management believes a market participant would use in pricing the asset or liability. Amounts recorded in a business combination may change during the measurement period, which is a period not to exceed one year from the date of acquisition, as additional information about conditions existing at the acquisition date becomes available. Goodwill and Purchased Intangible Assets Goodwill represents the excess of the purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. Intangible assets acquired individually, with a group of other assets, or in a business combination are recorded at fair value. Identifiable intangible assets are comprised of distribution channels and distribution rights, patents, licenses, technology, acquired backlog, trademarks and in-process research and development. Identifiable intangible assets are being amortized over the period of estimated benefit using the straight-line method, reflecting the pattern of economic benefits associated with these assets, and have estimated useful lives ranging from four years to eight years with a weighted average useful life of 6.1 years. Goodwill is not subject to amortization, but is subject to at least an annual assessment for impairment, applying a fair-value based test. Impairment of Goodwill, Intangible Assets and Other Long-Lived Assets The Company evaluates goodwill, at a minimum, on an annual basis and whenever events and changes in circumstances suggest that the carrying amount may not be recoverable. The Company performs its annual goodwill impairment testing in the fourth fiscal quarter of each year based on the values on the first day of that quarter. For the Company's annual goodwill impairment test in the fourth quarter of fiscal 2017 , goodwill was reviewed for impairment utilizing a quantitative two-step process. In the first step of this test, goodwill is tested for impairment at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair value of the reporting unit. The fair values of the reporting units are estimated using a discounted cash flow approach. If the carrying amount of the reporting unit exceeds its fair value, a second step is performed to measure the amount of impairment loss, if any. In step two, the implied fair value of goodwill is calculated as the excess of the fair value of a reporting unit over the fair values assigned to its assets and liabilities. If the implied fair value of goodwill is less than the carrying value of the reporting unit’s goodwill, the difference is recognized as an impairment loss. When the Company performs a quantitative assessment of goodwill impairment, the determination of fair value of a reporting unit involves the use of significant estimates and assumptions. The discounted cash flows are based upon, among other things, assumptions about expected future operating performance using risk-adjusted discount rates. Actual future results may differ from those estimates. As of the first day of the fourth quarter of fiscal 2017 , the fair value for our reporting units ranged from 311% to approximately 903% of carrying amounts, therefore goodwill was not impaired and no further testing was required. Depreciation and amortization of the Company’s intangible assets and other long-lived assets is provided using the straight-line method over their estimated useful lives, reflecting the pattern of economic benefits associated with these assets. Changes in circumstances such as technological advances, changes to the Company’s business model, or changes in the capital strategy could result in the actual useful lives differing from initial estimates. In cases where the Company determines that the useful life of an asset should be revised, the Company will depreciate the net book value in excess of the estimated residual value over its revised remaining useful life. These assets are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The estimated future cash flows are based upon, among other things, assumptions about expected future operating performance and these estimates may differ from actual future cash flows. The assets evaluated for impairment are grouped with other assets to the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. If the sum of the projected undiscounted cash flows (excluding interest) is less than the carrying value of the assets, the assets will be written down to the estimated fair value. Warranty The Company accrues for warranty costs as part of its cost of sales based on associated material product costs, technical support labor costs, and costs incurred by third parties performing work on the Company’s behalf. The Company’s expected future cost is primarily estimated based upon historical trends in the volume of product returns within the warranty period and the cost to repair or replace the equipment. When products sold include warranty provisions, they are covered by a warranty for periods ranging generally from one year to two years. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of component suppliers, its warranty obligation is affected by product failure rates, material usage, and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage, or service delivery costs differ from the estimates, revisions to the estimated warranty accrual and related costs may be required. Changes in the Company’s product warranty liability during the fiscal years ended 2017 and 2016 are as follows: Fiscal Years 2017 2016 (In millions) Beginning balance $ 17.2 $ 18.5 Acquired warranties 0.5 (0.2 ) Accruals for warranties issued 20.4 18.3 Changes in estimates (0.8 ) 0.3 Warranty settlements (in cash or in kind) (19.0 ) (19.7 ) Ending Balance $ 18.3 $ 17.2 Guarantees, Including Indirect Guarantees of Indebtedness of Others In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, lessors, and parties to other transactions with the Company. For example, the Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made by certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. In addition, the Company has entered into indemnification agreements with its officers and directors, and the Company’s bylaws contain similar indemnification obligations to the Company’s agents. It is not possible to determine the maximum potential exposure under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under these agreements have not been material and no liabilities have been recorded on the Consolidated Balance Sheets at the end of fiscal 2017 and 2016 . Revenue Recognition The Company recognizes revenue when it is realized or realizable and earned. The Company considers revenue realized or realizable and earned when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable, and collectibility is reasonably assured. In instances where final acceptance of the product is specified by the customer or is uncertain, revenue is deferred until all acceptance criteria have been met. Contracts and/or customer purchase orders are used to determine the existence of an arrangement. Shipping documents and customer acceptance, when applicable, are used to verify delivery. The Company assesses whether the fee is fixed or determinable based on the payment terms associated with the transaction and whether the sales price is subject to refund or adjustment. The Company assesses collectibility based primarily on the creditworthiness of the customer as determined by credit checks and analyses, as well as the customer’s payment history. Revenue for orders is not recognized until the product is shipped and title has transferred to the buyer. The Company bears all costs and risks of loss or damage to the goods up to that point. The Company’s shipment terms for U.S. orders and international orders fulfilled from the Company’s European distribution center typically provide that title passes to the buyer upon delivery of the goods to the carrier named by the buyer at the named place or point. If no precise point is indicated by the buyer, delivery is deemed to occur when the carrier takes the goods into its charge from the place determined by the Company. Other shipment terms may provide that title passes to the buyer upon delivery of the goods to the buyer. Shipping and handling costs are included in Cost of sales. Revenue from sales to distributors and dealers is recognized upon shipment, assuming all other criteria for revenue recognition have been met. Distributors and dealers do not have a right of return. Revenue from purchased extended warranty and post contract support ("PCS") agreements is deferred and recognized ratably over the term of the warranty or support period. Revenue from the Company's subscription services related to its hardware and software applications is recognized ratably over the term of the subscription service period beginning on the date that service is made available to the customer, assuming all revenue recognition criteria have been met. The Company presents revenue net of sales taxes and any similar assessments. The Company’s software arrangements generally consist of a perpetual license fee and PCS. The Company generally has established vendor-specific objective evidence ("VSOE") of fair value for the Company’s PCS contracts based on the renewal rate. The remaining value of the software arrangement is allocated to the license fee using the residual method. License revenue is primarily recognized when the software has been delivered and fair value has been established for all remaining undelivered elements. In cases where VSOE of fair value for PCS is not established, revenue is recognized ratably over the PCS period after all software deliverables have been made and the only the undelivered element is PCS. For services performed on a fixed-fee basis, revenue is recognized using the proportional performance method, with performance measured based on hours of work performed. For contracts that involve significant customization and implementation or consulting services that are essential to the functionality of the software, the license and services revenues are recognized using the percentage-of-completion method or, if we are unable to reliably estimate the costs to complete the services, we use the completed-contract method of accounting. A contract is considered complete when all significant costs have been incurred or when acceptance from the customer has been received. Some of the Company’s subscription product offerings include hardware, subscription services and extended warranty. Under these hosted arrangements, the customer typically does not have the contractual right to take possession of the software at any time during the hosting period without incurring a significant penalty and it is not feasible for the customer to run the software either on its own hardware or on a third-party’s hardware. The Company’s multiple deliverable product offerings include hardware with embedded firmware, extended warranty, software, PCS and subscription services, which are considered separate units of accounting. For certain of the Company’s products, software and non-software components function together to deliver the tangible product’s essential functionality. In evaluating the revenue recognition for the Company's hardware or subscription agreements which contain multiple deliverables, the Company determined that in certain instances the Company was not able to establish VSOE for some or all deliverables in an arrangement as the Company infrequently sold each element on a standalone basis, did not price products within a narrow range, or had a limited sales history. When VSOE cannot be established, the Company attempts to establish the selling price of each element based on relevant third-party evidence ("TPE"). TPE is determined based on competitor prices for similar deliverables when sold separately. The Company’s offerings may contain a significant level of proprietary technology, customization or differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine what similar competitor products’ selling prices are on a stand-alone basis. Therefore, the Company typically is not able to establish the selling price of an element based on TPE. When the Company is unable to establish selling price using VSOE or TPE, the Company uses its best estimate of selling price ("BESP") in the Company’s allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. BESP is generally used for offerings that are not typically sold on a stand-alone basis or for new or highly customized offerings. The Company determines BESP for a product or service by considering multiple factors including, but not limited to, pricing practices, market conditions, competitive landscape, internal costs, geographies and gross margin. The determination of BESP is made through consultation with and formal approval by the Company’s management, taking into consideration the Company’s go-to-market strategy. Advertising and Promotional Costs The Company expenses all advertising and promotional costs as incurred. Advertising and promotional expense was approximately $37.2 million , $37.2 million , and $32.3 million , in fiscal 2017 , 2016 and 2015 , respectively. Research and Development Costs Research and development costs are charged to expense as incurred. Cost of software developed for external sale subsequent to reaching technical feasibility were not significant and were expensed as incurred. The Company received third party funding of approximately $18.1 million , $13.0 million , and $12.5 million in fiscal 2017 , 2016 and 2015 , respectively. The Company offsets research and development expense with any third party funding earned. The Company retains the rights to any technology developed under such arrangements. Stock-Based Compensation The Company has employee stock benefit plans, which are described more fully in "Note 13: Employee Stock Benefit Plans." Stock compensation expense recognized in the Consolidated Statements of Income is based on the fair value of the portion of share-based payment awards expected to vest during the period, net of estimated forfeitures. The Company attributes the fair value of stock options and restricted stock units ("RSUs") to expense using the straight-line method. The fair value for time-based and performance-based RSUs ("PSUs") is measured at the grant date using the fair value of Trimble’s common stock, with total expense for PSUs based upon the expected achievement of the underlying performance goals as adjusted in future periods for changes in expectations and actual achievement. The fair value for restricted stock units with market-based vesting conditions is measured at the grant date using a Monte Carlo simulation. The grant date fair value for options is estimated using the binomial valuation model. The fair value of rights to purchase shares under the Employee Stock Purchase Plan ("ESPP") is estimated using the Black-Scholes option-pricing model. The Company estimates forfeitures at the date of grant and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical and current information to estimate forfeitures. Income Taxes Income taxes are accounted for under the liability method whereby deferred tax assets or liability account balances are calculated at the balance sheet date using current tax laws and rates in effect for the year in which the differences are expected to affect taxable income. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets if it is more likely than not such assets will not be realized. The Company’s valuation allowance is primarily attributable to foreign net operating losses and state research and development credit carryforwards. Management believes that it is more likely than not that the Company will not realize certain of these deferred tax assets, and, accordingly, a valuation allowance has been provided for such amounts. Valuation allowance adjustments associated with an acquisition after the measurement period are recorded through income tax expense. Relative to uncertain tax positions, the Company only recognizes a tax benefit if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and may not accurately forecast actual tax audit outcomes. Determining whether an uncertain tax position is effectively settled requires judgment. Changes in recognition or measurement of the Company's uncertain tax positions would result in the recognition of a tax benefit or an additional charge to the tax provision. The Company’s practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company is subject to income taxes in the U.S. and numerous other countries, and is subject to routine corporate income tax audits in many of these jurisdictions. The Company generally believes that positions taken on its tax returns are more likely than not to be sustained upon audit, but tax authorities in some circumstance have, and may in the future, successfully challenge these positions. Accordingly, the Company’s income tax provision includes amounts intended to satisfy assessments that may result from these challenges. Determining the income tax provision for these potential assessments and recording the related effects requires management judgments and estimates. The amounts ultimately paid on resolution of an audit could be materially different from the amounts previously included in the Company’s income tax provision and, therefore, could have a material impact on its income tax provision, net income and cash flows. The Company’s accrual for uncertain tax positions includes uncertainties concerning the tax treatment of our international operations, including the allocation of income among different jurisdictions, intercompany transactions and related interest. See Note 11 of the Notes to consolidated financial statements for additional information. Computation of Earnings Per Share The number of shares used in the calculation of basic earnings per share represents the weighted average common shares outstanding during the perio

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 29, 2017
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Basic earnings per share is computed by dividing Net income by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing Net income by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options, shares to be purchased under the Company’s employee stock purchase plan and restricted stock units. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities. The following table shows the computation of basic and diluted earnings per share: Fiscal Years 2017 2016 2015 (In millions, except per share data) Numerator: Net income attributable to Trimble Inc. $ 121.1 $ 132.4 $ 121.1 Denominator: Weighted average number of common shares used in basic earnings per share 252.1 250.5 255.8 Effect of dilutive securities 4.6 3.4 2.7 Weighted average number of common shares and dilutive potential common shares used in diluted earnings per share 256.7 253.9 258.5 Basic earnings per share $ 0.48 $ 0.53 $ 0.47 Diluted earnings per share $ 0.47 $ 0.52 $ 0.47 For fiscal 2017 , 2016 and 2015 the Company excluded 0.5 million shares, 4.3 million shares and 6.1 million shares of outstanding stock options, respectively, from the calculation of diluted earnings per share because their effect would have been antidilutive.

Business Combinations

Business Combinations	12 Months Ended
	Dec. 29, 2017
Business Combinations [Abstract]
Business Combinations	BUSINESS COMBINATIONS During fiscal 2017 , 2016 and 2015 the Company acquired multiple businesses, all with cash consideration. The Consolidated Statements of Income include the operating results of the businesses from the dates of acquisition. During fiscal 2017 , the Company acquired ten businesses, with total purchase consideration of $331.2 million . The purchase prices ranged from less than $2.0 million to $134.0 million . The largest acquisition was Müller-Elektronik, a privately held German company specializing in implement control and precision farming solutions. In the aggregate, the businesses acquired during fiscal 2017 contributed approximately two percent to the Company's total revenue during fiscal 2017 . During fiscal 2016 , the Company acquired four businesses, with total purchase consideration of $27.6 million . The purchase prices ranged from less than $0.3 million to $14.0 million . The acquisitions were not significant individually or in the aggregate. The largest acquisition was of a company that manages content and software solutions that enable Mechanical, Electrical and Plumbing (MEP) contractors and engineers to produce intelligent and constructible models, based in Rocklin, California. In the aggregate, the businesses acquired during fiscal 2016 contributed less than one percent to the Company's total revenue during fiscal 2016 . During fiscal 2015 , the Company acquired thirteen businesses, with total purchase consideration of $176.2 million . The acquisitions were not significant individually or in the aggregate. The purchase prices ranged from less than $2.0 million to $30.0 million . The largest acquisition was a Norwegian company specializing in BIM software for infrastructure design software solutions across the European region. In the aggregate, the businesses acquired during fiscal 2015 collectively contributed less than one percent to the Company's total revenue during fiscal 2015 . The Company determined the total consideration paid for each of its acquisitions as well as the fair value of the assets acquired and liabilities assumed as of the date of each acquisition. For certain acquisitions completed in fiscal 2017 , the fair value of the assets acquired and liabilities assumed are preliminary and may be adjusted as the Company obtains additional information, primarily related to adjustments for the true up of acquired net working capital in accordance with certain purchase agreements, and estimated values of certain net tangible assets and liabilities including tax balances, pending the completion of final studies and analyses. If there are adjustments made for these items the fair value of intangible assets and goodwill could be impacted. Thus the provisional measurements of fair value set forth below are subject to change. Such changes could be significant. The Company expects to finalize the valuation of the net tangible and intangible assets as soon as practicable, but not later than one -year from the acquisition date. The fair value of identifiable assets acquired and liabilities assumed were determined under the acquisition method of accounting for business combinations. The excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill. The fair value of intangible assets acquired is generally determined based on a discounted cash flow analysis. Acquisition costs of $7.4 million , $6.8 million and $9.9 million in fiscal 2017 , 2016 and 2015 , respectively, were expensed as incurred, along with the changes in fair value of the contingent consideration liabilities, and are included in General and administrative expenses in the Consolidated Statements of Income. The following table summarizes the Company’s business combinations completed during fiscal 2017 , 2016 and 2015 : Fiscal Years 2017 2016 2015 (In millions) Fair value of total purchase consideration $ 331.2 $ 27.6 $ 176.2 Less fair value of net assets acquired: Net tangible assets acquired 29.7 (1.9 ) 8.0 Identified intangible assets 166.7 13.6 83.3 Deferred taxes (5.8 ) (1.3 ) (13.6 ) Goodwill $ 140.6 $ 17.2 $ 98.5 Intangible Assets The following table presents details of the Company’s total intangible assets: At the End of Fiscal 2017 At the End of Fiscal 2016 (In millions) Weighted-Average Remaining Useful Lives (in years) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed product technology 6 $ 915.3 $ (729.9 ) $ 185.4 $ 794.8 $ (620.6 ) $ 174.2 Trade names and trademarks 5 58.7 (48.6 ) 10.1 50.9 (42.9 ) 8.0 Customer relationships 7 512.1 (351.3 ) 160.8 438.7 (294.1 ) 144.6 Distribution rights and other intellectual properties 6 69.2 (60.7 ) 8.5 64.3 (57.8 ) 6.5 $ 1,555.3 $ (1,190.5 ) $ 364.8 $ 1,348.7 $ (1,015.4 ) $ 333.3 The estimated future amortization expense of intangible assets at the end of fiscal 2017 is as follows (in millions): 2018 $ 133.1 2019 91.6 2020 62.6 2021 40.7 2022 21.7 Thereafter 15.1 Total $ 364.8 Goodwill In March 2017, the information used to allocate resources and assess performance that is provided to the Company's chief operating decision maker, its Chief Executive Officer, changed to better reflect the Company's customer base and end markets. As further described in Note 6, the new reporting structure consists of four operating segments, each representing a single reporting unit: Buildings and Infrastructure, Geospatial, Resources and Utilities, and Transportation. Goodwill was reassigned to the new reporting units using the relative fair values and, as a result of this reassignment, an impairment assessment was performed immediately before and after the reorganization of the Company’s reporting structure. There was no goodwill impairment resulting from this assessment in the first quarter of fiscal 2017. The changes in the carrying amount of goodwill by segment for fiscal 2017 are as follows: (In millions) Buildings and Infrastructure Geospatial Resources and Utilities Transportation Total At the end of fiscal 2016 $ 663.7 $ 405.1 $ 217.7 $ 791.1 $ 2,077.6 Additions due to acquisitions and current year acquisitions' purchase price adjustments 2.5 — 86.3 51.8 140.6 Purchase price adjustments - prior years' acquisitions (0.1 ) — — — (0.1 ) Foreign currency translation adjustments 40.7 17.1 10.5 7.6 75.9 Divestitures (1) — (6.9 ) — — (6.9 ) At the end of fiscal 2017 $ 706.8 $ 415.3 $ 314.5 $ 850.5 $ 2,287.1 (1) In the first quarter of 2017, the Company sold its ThingMagic business, which was part of the Geospatial segment.

Certain Balance Sheet Component

Certain Balance Sheet Components	12 Months Ended
	Dec. 29, 2017
Balance Sheet Related Disclosures [Abstract]
Certain Balance Sheet Components	CERTAIN BALANCE SHEET COMPONENTS The following tables provide details of selected balance sheet items: At the End of Fiscal Year 2017 2016 (In millions) Inventories: Raw materials $ 85.4 $ 77.9 Work-in-process 12.4 6.8 Finished goods 174.0 134.1 Total inventories $ 271.8 $ 218.8 Finished goods includes $16.6 million at the end of fiscal year 2017 and $14.4 million at the end of fiscal year 2016 for costs of sales that have been deferred in connection with arrangements for which the related revenue has been deferred. At the End of Fiscal Year 2017 2016 (In millions) Property and equipment, net: Machinery and equipment $ 130.6 $ 113.3 Software and licenses 124.4 119.4 Furniture and fixtures 29.3 26.3 Leasehold improvements 36.6 32.1 Construction in progress 32.9 10.8 Buildings 60.9 47.9 Land 10.0 8.3 424.7 358.1 Less: accumulated depreciation (250.7 ) (213.9 ) Total $ 174.0 $ 144.2 At the End of Fiscal Year 2017 2016 (In millions) Other non-current liabilities: Deferred compensation $ 27.1 $ 22.6 Pension 19.6 13.1 Deferred rent 3.1 3.3 Unrecognized tax benefits 76.4 65.3 Other 35.8 9.5 Total $ 162.0 $ 113.8

Reporting Segment And Geographi

Reporting Segment And Geographic Information	12 Months Ended
	Dec. 29, 2017
Segment Reporting, Measurement Disclosures [Abstract]
Reporting Segment And Geographic Information	REPORTING SEGMENT AND GEOGRAPHIC INFORMATION Operating segments are defined as components of an enterprise that engage in business activities for which separate financial information is available and evaluated by the Company's Chief Executive Officer (our chief operating decision maker or "CODM") in deciding how to allocate resources and assess performance. The CODM evaluates each segment’s performance and allocates resources based on segment operating income before income taxes and corporate allocations. The Company and each of its segments employ consistent accounting policies. In each of its segments, the Company sells many individual products. For this reason it is impracticable to segregate and identify revenue for each of the individual products or group of products. Stock-based compensation is shown in the aggregate within unallocated corporate expense and is not reflected in the segment results, which is consistent with the way the CODM evaluates each segment's performance and allocates resources. Prior to fiscal 2017, the Company operated its business in four reportable segments - Engineering and Construction, Field Solutions, Mobile Solutions, and Advanced Devices. In March 2017, the Company effected a change in the reporting of its segment financial results to better reflect the Company’s customer base and end markets. As a result of the Company’s evolution, the CODM changed the information he regularly reviews to allocate resources and assess performance. Beginning with the first fiscal quarter of 2017, the Company reports its financial performance based on four new reportable segments - Buildings and Infrastructure, Geospatial, Resources and Utilities, and Transportation. The Company’s reportable segments are described below: • Buildings and Infrastructure: This segment primarily serves customers working in architecture, engineering, construction, geospatial and government. • Geospatial: This segment primarily serves customers working in surveying, engineering, government, and land management. • Resources and Utilities: This segment primarily serves customers working in agriculture, forestry, and utilities. • Transportation: This segment primarily serves customers working in transportation, including transportation and logistics, automotive, rail, and military aviation. The following tables present revenue, operating income, depreciation expense and identifiable assets for the four segments. Operating income is revenue less cost of sales and operating expenses, excluding unallocated corporate expenses, restructuring charges, amortization of purchased intangible assets, stock-based compensation, amortization of acquisition-related inventory step-up, acquisition and divestiture items, and executive transition costs. The identifiable assets that the CODM views by segment are accounts receivable, inventories and goodwill. Fiscal Years 2017 2016 2015 (In millions) Buildings and Infrastructure Revenue $ 834.9 $ 743.5 $ 688.6 Operating income 179.9 133.9 108.2 Depreciation expense 6.2 7.0 7.8 Geospatial Revenue $ 661.2 $ 634.7 $ 672.8 Operating income 130.9 120.8 135.3 Depreciation expense 5.4 6.5 6.4 Resources and Utilities Revenue $ 476.9 $ 395.7 $ 381.8 Operating income 136.3 118.4 109.9 Depreciation expense 3.2 2.0 1.9 Transportation Revenue $ 681.2 $ 588.3 $ 547.2 Operating income 120.6 102.9 106.5 Depreciation expense 5.2 5.5 5.2 Total Revenue $ 2,654.2 $ 2,362.2 $ 2,290.4 Operating income 567.7 476.0 459.9 Depreciation expense 20.0 21.0 21.3 At the End of Fiscal Year 2017 2016 (In millions) Buildings and Infrastructure Accounts receivable $ 118.5 $ 104.7 Inventories 62.1 51.3 Goodwill 706.8 663.7 Geospatial Accounts receivable $ 117.7 $ 108.3 Inventories 110.7 100.4 Goodwill 415.3 405.1 Resources and Utilities Accounts receivable $ 76.9 $ 65.5 Inventories 45.3 31.0 Goodwill 314.5 217.7 Transportation Accounts receivable $ 101.7 $ 76.3 Inventories 53.7 36.1 Goodwill 850.5 791.1 Total Accounts receivable $ 414.8 $ 354.8 Inventories 271.8 218.8 Goodwill 2,287.1 2,077.6 A reconciliation of the Company’s consolidated segment operating income to consolidated income before income taxes is as follows: Fiscal Years 2017 2016 2015 (In millions) Consolidated segment operating income $ 567.7 $ 476.0 $ 459.9 Unallocated corporate expense (1) (87.4 ) (70.5 ) (70.0 ) Restructuring charges (2) (10.5 ) (13.3 ) (12.8 ) Stock-based compensation (64.8 ) (52.6 ) (50.1 ) Amortization of purchased intangible assets (148.8 ) (150.8 ) (162.4 ) Amortization of acquisition-related inventory step-up (2.8 ) — — Acquisition and divestiture items (7.4 ) (6.8 ) (9.9 ) Executive transition costs — (1.0 ) — Litigation costs — — (0.3 ) Consolidated operating income 246.0 181.0 154.4 Non-operating income (expense), net 13.1 (4.3 ) (2.6 ) Consolidated income before taxes $ 259.1 $ 176.7 $ 151.8 (1) Unallocated corporate expense includes general corporate expense. (2) Restructuring charges primarily consist of severance and benefits, resulting from employee headcount reductions in connection with the Company's restructuring programs related to decisions to streamline processes and reduce the cost structure. As of the end of fiscal 2017 , the Company's restructuring liability was $1.4 million , which is expected to be settled in fiscal 2018. Restructuring liabilities are reported within Other current liabilities on the Consolidated Balance Sheets. The geographic distribution of Trimble’s revenue and long-lived assets is summarized in the tables below. Other non-US geographies include Canada, and countries in South and Central America, the Middle East, and Africa. Revenue is defined as revenue from external customers. Fiscal Years 2017 2016 2015 (In millions) Revenue (1): United States $ 1,285.7 $ 1,156.0 $ 1,142.1 Europe 677.1 574.9 557.2 Asia Pacific 378.3 352.6 321.1 Other non-US countries 313.1 278.7 270.0 Total consolidated revenue $ 2,654.2 $ 2,362.2 $ 2,290.4 (1) Revenue is attributed to countries based on the location of the customer. No single customer or country other than the United States accounted for 10% or more of Trimble’s total revenue in fiscal years 2017 , 2016 and 2015 . No single customer accounted for 10% or more of Trimble's accounts receivable as of fiscal years ended 2017 and 2016 . Property and equipment, net by geographic area was as follows: At the End of Fiscal Year 2017 2016 (In millions) Property and equipment, net: United States $ 131.7 $ 120.4 Europe 33.1 15.3 Asia Pacific and other non-US countries 9.2 8.5 Total property and equipment, net $ 174.0 $ 144.2

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 29, 2017
Long-term Debt, Unclassified [Abstract]
Long-Term Debt	DEBT Debt consisted of the following: At the End of Fiscal Year 2017 2016 (In millions) Notes: Principal amount $ 400.0 $ 400.0 Unamortized discount on Notes (2.2 ) (2.5 ) Debt issuance costs (2.1 ) (2.4 ) Credit Facilities: 2014 Credit facility 389.0 94.0 Uncommitted facilities 128.0 130.0 Promissory notes and other debt 1.2 0.8 Total debt 913.9 619.9 Less: Short-term debt 128.4 130.3 Long-term debt $ 785.5 $ 489.6 Notes On October 30, 2014 , the Company filed a shelf registration statement with the Securities and Exchange Commission (“SEC”) for the issuance of senior debt securities. On November 24, 2014 , the Company issued $400.0 million of Senior Notes (“Notes”) under the shelf registration statement. Net proceeds from the offering were $396.9 million after deducting the 0.795% discount on the public offering price. The Company recognized $3.0 million of debt issuance costs associated with the issuance of the Notes, including an underwriting discount of $2.6 million , which is classified as an offset to the Notes on the Consolidated Balance Sheets. The discount and debt issuance costs are being amortized to interest expense using the effective interest rate method over the term of the Notes. The Notes mature on December 1, 2024 and accrue interest at a rate of 4.75% per annum, payable semiannually in arrears in cash on December 1 and June 1 of each year, beginning on June 1, 2015. The Notes are classified as long-term in the Consolidated Balance Sheets. Prior to September 1, 2024, Trimble may redeem the Notes at its option at any time, in whole or in part, at a redemption price equal to the greater of (i) 100% of the aggregate principal amount of the Notes to be redeemed and (ii) the sum of the present values of the remaining scheduled payments of interest and principal, calculated on a semiannual basis using a discount rate equal to the U.S. Treasury rate plus 40 basis points. After September 1, 2024, Trimble may redeem the Notes at its option at any time, in whole or in part, at a redemption price equal to 100% of the aggregate principal amount of the Notes to be redeemed, plus accrued and unpaid interest thereon. In addition, in the event of a change of control, as defined in the prospectus filed with the SEC, each holder of the Notes will have the right to require Trimble to purchase for cash all or a portion of such holder’s Notes at a purchase price equal to 101% of the principal amount of the Notes, plus any accrued and unpaid interest. In connection with the closing of the Notes offering, Trimble entered into an Indenture with U.S. Bank National Association, as trustee. The Indenture contains covenants limiting Trimble’s ability to create certain liens, enter into sale and lease-back transactions, and consolidate or merge with or into, or convey, transfer or lease all or substantially all of Trimble’s properties and assets to, another person, each subject to certain exceptions. The Notes contain no financial covenants. Credit Facilities 2014 Credit Facility On November 24, 2014 , the Company entered into a new five -year credit agreement with a group of lenders (the “2014 Credit Facility”). The 2014 Credit Facility provides for an unsecured revolving loan facility of $1.0 billion . Subject to the terms of the 2014 Credit Facility, the revolving loan facility may be increased and/or term loan facilities may be established in an amount up to $500.0 million . The outstanding balance of $389.0 million and $94.0 million is classified as long-term in the Consolidated Balance Sheets as of fiscal years ended 2017 and 2016 , respectively. The 2014 Credit Facility replaced the Company's previous 2012 Credit Facility comprised of a five -year revolving loan facility of $700.0 million and a five -year $700.0 million term loan facility. Upon entering into the 2014 Credit Facility, the Company borrowed $307.0 million under the revolving loan facility. The Company used the proceeds from the revolving loan facility and the issuance of the Notes to pay off the then $638.8 million outstanding term loan balance under the 2012 Credit Facility. The Company also wrote off a portion of the unamortized debt issuance costs related to the 2012 Credit Facility totaling $2.7 million , which is classified as a non-operating expense in the Company’s fiscal 2014 Consolidated Statement of Income. In addition, the Company recognized $1.6 million of debt issuance costs associated with the 2014 Credit Facility. The remaining unamortized debt issuance costs associated with the 2012 Credit Facility and the new debt issuance costs associated with the 2014 Credit Facility are classified as current and non-current assets on the Consolidated Balance Sheets and being amortized to interest expense using the effective interest rate method over the term of the 2014 Credit Facility. The funds available under the 2014 Credit Facility may be used for working capital and general corporate purposes including stock repurchases and the financing of certain acquisitions. Under the 2014 Credit Facility, the Company may borrow, repay and reborrow funds under the revolving loan facility until its maturity on November 24, 2019 , at which time the revolving facility will terminate, and all outstanding loans, together with all accrued and unpaid interest, must be repaid. Amounts not borrowed under the revolving facility will be subject to a commitment fee, to be paid in arrears on the last day of each fiscal quarter, ranging from 0.10% to 0.30% per annum depending on either the Company's credit rating at such time or the Company's leverage ratio as of the most recently ended fiscal quarter, whichever results in more favorable pricing to the Company. The Company may borrow funds under the 2014 Credit Facility in U.S. Dollars, Euros or in certain other agreed currencies, and borrowings will bear interest, at the Company’s option, at either: (i) a floating per annum base rate determined by reference to the highest of: (a) the administrative agent’s prime rate; (b) 0.50% per annum above the federal funds effective rate; and (c) reserve-adjusted LIBOR for an interest period of one month plus 1.00% , plus a margin of between 0.00% and 0.75% , or (ii) a reserve-adjusted fixed per annum rate based on LIBOR or EURIBOR, depending on the currency borrowed, plus a margin of between 1.00% and 1.75% . The applicable margin in each case is determined based on either Trimble’s credit rating at such time or Trimble’s leverage ratio as of its most recently ended fiscal quarter, whichever results in more favorable pricing to Trimble. Interest is payable on the last day of each fiscal quarter with respect to borrowings bearing interest at the base rate, or on the last day of an interest period, but at least every three months, with respect to borrowings bearing interest at LIBOR or EURIBOR rate. The 2014 Credit Facility contains various customary representations and warranties by the Company, which include customary use of materiality, material adverse effect and knowledge qualifiers. The 2014 Credit Facility also contains customary affirmative and negative covenants including, among other requirements, negative covenants that restrict the Company's ability to create liens and enter into sale and leaseback transactions, and that restrict its subsidiaries’ ability to incur indebtedness. Further, the 2014 Credit Facility contains financial covenants that require the maintenance of minimum interest coverage and maximum leverage ratios. Specifically, the Company must maintain as of the end of each fiscal quarter a ratio of (a) EBITDA (as defined in the 2014 Credit Facility) to (b) interest expense for the most recently ended period of four fiscal quarters of not less than 3.50 to 1.00. The Company must also maintain, at the end of each fiscal quarter, a ratio of (x) total indebtedness (as defined in the 2014 Credit Facility) to (y) EBITDA (as defined in the 2014 Credit Facility) for the most recently ended period of four fiscal quarters of not greater than 3.00 to 1.00; provided, that on the completion of a material acquisition, the Company may increase the ratio by 0.50 for the fiscal quarter during which such acquisition occurred and each of the three subsequent fiscal quarters. The Company was in compliance with these covenants at the end of fiscal 2017. The 2014 Credit Facility contains events of default that include, among others, non-payment of principal, interest or fees, breach of covenants, inaccuracy of representations and warranties, cross defaults to certain other indebtedness, bankruptcy and insolvency events, material judgments and events constituting a change of control. Upon the occurrence and during the continuance of an event of default, interest on the obligations will accrue at an increased rate in the case of an event of default arising from the nonpayment of principal and the lenders may accelerate the Company's obligations under the 2014 Credit Facility, except that acceleration will be automatic in the case of bankruptcy and insolvency events of default. In February 2016, the Company entered into an amendment to the 2014 Credit Facility to facilitate the Company's reincorporation from California to Delaware and to effect other non-financial terms. In August 2016, the Company entered into a second amendment to revise a definition used in determining when a change of control of the Company may occur. The weighted average interest rate on the long-term debt outstanding under the 2014 Credit Facility was 2.55% and 1.80% at the end of fiscal 2017 and 2016 , respectively. Uncommitted Facilities The Company also has two $75.0 million revolving credit facilities which are uncommitted (the "Uncommitted Facilities"). The Uncommitted Facilities may be called by the lenders at any time, have no covenants and no specified expiration date. The interest rate on the Uncommitted Facilities is 1.00% plus either LIBOR or the bank’s cost of funds or as otherwise agreed upon by the bank and the Company. The $128.0 million outstanding at the end of 2017 and the $130.0 million outstanding at the end of 2016 under the Uncommitted Facilities are classified as short-term in the Consolidated Balance Sheets. The weighted average interest rate on the Uncommitted Facilities was 2.24% at the end of fiscal 2017 and 1.65% at the end of fiscal 2016 . Promissory Notes and Other Debt At the end of fiscal 2017 and 2016 , the Company had promissory notes and other notes payable totaling approximately $1.2 million and $0.8 million , respectively, of which $0.8 million and $0.5 million , respectively, was classified as long-term in the Consolidated Balance Sheets. Debt Maturities At the end of fiscal 2017 , the Company's debt maturities based on outstanding principal were as follows (in millions): Year Payable 2018 $ 128.4 2019 389.4 2020 0.3 2021 0.1 2022 — Thereafter 400.0 Total $ 918.2 On February 2, 2018, the Company entered into a $300.0 million Revolving Credit Agreement (the “2018 Interim Credit Facility”), by and between the Company and The Bank of Nova Scotia. For additional discussion, see Note 17 to the consolidated financial statements.

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 29, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Operating Leases and Other Commitments The Company’s principal facilities are leased under various cancelable and non-cancelable operating leases that expire at various dates through 2025. For tenant improvement allowances and rent holidays, Trimble records a deferred rent liability on the Consolidated Balance Sheets and amortizes the deferred rent over the terms of the leases as reductions to rent expense on the Consolidated Statements of Income. The estimated future minimum payments required under the Company’s operating lease commitments at the end of fiscal 2017 were as follows (in millions): 2018 $ 35.5 2019 30.1 2020 22.5 2021 19.7 2022 15.1 Thereafter 29.5 Total $ 152.4 Net rent expense under operating leases was $35.5 million in fiscal 2017 , $34.4 million in fiscal 2016 , and $34.0 million in fiscal 2015 . At the end of fiscal 2017 , the Company had unconditional purchase obligations of approximately $198.1 million . These unconditional purchase obligations primarily represent open non-cancelable purchase orders for material purchases with the Company’s vendors. Purchase obligations exclude agreements that are cancelable without penalty. Additionally, the Company has certain acquisitions that include additional earn-out cash payments based on estimated future revenues, gross margins or other milestones. At the end of fiscal 2017 , the Company had $14.2 million included in Other current liabilities of $0.9 million and Other non-current liabilities of $13.3 million related to these earn-outs, representing the fair value of the contingent consideration. Litigation On September 2, 2011, Recreational Data Services, LLC filed a lawsuit in the Superior Court for the State of Alaska in Anchorage against Trimble Navigation Limited, Cabela’s Incorporated, AT&T Mobility and Alascom, Inc., alleging breach of contract, breach of fiduciary duty, interference with contract, promissory estoppel, fraud, and negligent misrepresentation. The case was tried in front of a jury in Alaska beginning on September 9, 2014. On September 26, 2014, the jury returned a verdict in favor of the plaintiff and awarded the plaintiff damages of $51.3 million . On January 29, 2015, the court granted our Motion for Judgment Notwithstanding the Verdict, and on March 18, 2015, the Court awarded the Company a portion of its incurred attorneys’ fees and costs, and entered Final Judgment in the Company’s favor in the amount of $0.6 million . The Judgment also provides that the plaintiff take nothing on its claims. On April 17, 2015, the plaintiff filed a Notice of Appeal to the Alaska Supreme Court. On March 24, 2017, the Alaska Supreme Court affirmed, in part, and reversed, in part, the trial court's decision. The Alaska Supreme Court affirmed the trial court's determination that plaintiff had not proven damages and was not entitled to recover any lost profits, and remanded the case to the trial court for an award of nominal damages to plaintiff. On December 8, 2017, the trial court entered judgment awarding nominal damages (one Dollar) to plaintiff. On December 22, 2017, plaintiff filed a Petition for Writ of Certiorari with the U.S. Supreme Court seeking further review of the Alaska Supreme Court’s decision. From time to time, the Company is also involved in litigation arising out of the ordinary course of our business. There are no other material legal proceedings, other than ordinary routine litigation incidental to the business, to which the Company or any of its subsidiaries is a party or of which any of the Company's or its subsidiaries' property is subject.

Cash Equivalents and Investment

Cash Equivalents and Investments	12 Months Ended
	Dec. 29, 2017
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents, and Short-term Investments	CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS The following table summarizes the Company’s available-for-sale securities: At the End of Fiscal Year 2017 2016 (In millions) Available-for-sale securities: U.S. Treasury securities $ 9.6 $ 11.7 Municipal debt securities — 10.0 Corporate debt securities 96.0 31.7 Time deposit — 2.4 Commercial paper 100.1 77.5 Total available-for-sale securities $ 205.7 $ 133.3 Reported as: Cash and cash equivalents $ 26.8 $ 22.2 Short-term investments 178.9 111.1 Total $ 205.7 $ 133.3 The gross realized and unrealized gains or losses on the Company's available-for-sale investments as of the end of fiscal 2017 and 2016 were not significant. As of the end of fiscal 2017, the Company considered the decreases in market value on its available-for-sale investments to be temporary in nature and did not consider any of the investments to be other-than-temporarily impaired. The following table presents the contractual maturities of the Company's available-for-sale investments: At the End of Fiscal Year 2017 2016 (In millions) Due in less than 1 year $ 191.1 $ 106.9 Due in 1 to 5 years 14.6 16.4 Due in 5-10 years — 2.0 Due after 10 years — 8.0 Total $ 205.7 $ 133.3 The Company’s available-for-sale securities are liquid and may be sold to fund future operating needs. As a result, the Company recorded all of its available-for-sale securities, not classified as Cash equivalents, in Short-term investments regardless of the contractual maturity date of the securities.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 29, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The Company determines fair value based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Where available, fair value is based on observable market prices or parameters. Where observable prices or inputs are not available, valuation models are applied. Hierarchical levels, defined by the guidance on fair value measurements are directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities, and are as follows: Level I—Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities. Level II—Inputs (other than quoted prices included in Level I) are either directly or indirectly observable for the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level III—Unobservable inputs that reflect management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model. Fair Value on a Recurring Basis Assets and liabilities measured at fair value on a recurring basis are categorized in the tables below based upon the lowest level of significant input to the valuations. At the End of Fiscal Year 2017 2016 (In millions) Level I Level II Level III Total Level I Level II Level III Total Assets Available-for-sale securities: U.S. Treasury securities (1) $ — $ 9.6 $ — $ 9.6 $ — $ 11.7 $ — $ 11.7 Municipal debt securities (1) — — — — — 10.0 — 10.0 Corporate debt securities (1) — 96.0 — 96.0 — 31.7 — 31.7 Time deposit (1) — — 2.4 2.4 Commercial paper (1) — 100.1 — 100.1 — 77.5 — 77.5 Total available-for-sale securities — 205.7 — 205.7 — 133.3 — 133.3 Deferred compensation plan assets (2) 27.1 — — 27.1 22.6 — — 22.6 Derivative assets (3) — 0.5 — 0.5 — 0.2 — 0.2 Contingent consideration asset (4) — — — — — — 7.0 7.0 Total assets measured at fair value $ 27.1 $ 206.2 $ — $ 233.3 $ 22.6 $ 133.5 $ 7.0 $ 163.1 Liabilities Deferred compensation plan liabilities (2) $ 27.1 $ — $ — $ 27.1 $ 22.6 $ — $ — $ 22.6 Derivative liabilities (3) — 0.1 — 0.1 — 0.1 — 0.1 Contingent consideration liabilities (5) — — 14.2 14.2 — — 4.5 4.5 Total liabilities measured at fair value $ 27.1 $ 0.1 $ 14.2 $ 41.4 $ 22.6 $ 0.1 $ 4.5 $ 27.2 (1) The Company’s available-for sale securities are valued using readily available pricing sources for comparable instruments, or model-driven valuations using significant inputs derived from or corroborated by observable market data, including yield curves and credit ratings. (2) The Company maintains a self-directed, non-qualified deferred compensation plan for certain executives and other highly compensated employees. The plan assets and liabilities are invested in actively traded mutual funds and individual stocks valued using observable quoted prices in active markets. Deferred compensation plan assets and liabilities are included in Other non-current assets and Other non-current liabilities, respectively, on the Company's Consolidated Balance Sheets. (3) Derivative assets and liabilities primarily represent forward currency exchange contracts. The Company typically enters into these contracts to minimize the short-term impact of foreign currency exchange rates on certain trade and inter-company receivables and payables. Derivative assets and liabilities are included in Other current assets and Other current liabilities on the Company's Consolidated Balance Sheets. (4) Contingent consideration asset represents an arrangement for buyers to pay the Company for a business that it has divested. The fair value is determined based on the Company's expectations of future receipts. Due to the Company's assessment of the recoverability of the contingent consideration asset, the Company recognized an impairment loss of $7.0 million , which is included in Other income, net for fiscal 2017. (5) Contingent consideration liabilities represent arrangements to pay the former owners of certain companies that Trimble acquired. The undiscounted maximum payment under the arrangements is $50.3 million at the end of fiscal 2017 . The fair values are estimated using scenario-based methods or option pricing methods based upon estimated future revenues, gross margins or other milestones. Contingent consideration liabilities are included in Other current liabilities and Other non-current liabilities on the Company's Consolidated Balance Sheets. Additional Fair Value Information The following table provides additional fair value information relating to the Company’s financial instruments outstanding: At the End of Fiscal Year 2017 2016 (In millions) Carrying Amount Fair Value Carrying Amount Fair Value Liabilities: Notes $ 400.0 $ 430.4 $ 400.0 $ 410.6 2014 Credit facility 389.0 389.0 94.0 94.0 Uncommitted facilities 128.0 128.0 130.0 130.0 Promissory notes and other debt 1.2 1.2 0.8 0.8 The fair value of the Notes was determined based on observable market prices in less active markets and is categorized accordingly as Level II in the fair value hierarchy. The fair value of the bank borrowings and promissory notes has been calculated using an estimate of the interest rate the Company would have had to pay on the issuance of notes with a similar maturity and discounting the cash flows at that rate, and is categorized as Level II in the fair value hierarchy. The fair values do not give an indication of the amount that the Company would currently have to pay to extinguish any of this debt.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 29, 2017
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Income before taxes and the provision for taxes consisted of the following: Fiscal Years 2017 2016 2015 (In millions) Income before taxes: United States $ 38.0 $ 68.4 $ 55.6 Foreign 221.1 108.3 96.2 Total $ 259.1 $ 176.7 $ 151.8 Provision for taxes: US Federal: Current $ 98.6 $ 34.0 $ 47.5 Deferred 0.8 (14.3 ) (23.0 ) 99.4 19.7 24.5 US State: Current 4.5 3.5 5.7 Deferred (1.1 ) 0.6 (2.8 ) 3.4 4.1 2.9 Foreign: Current 42.7 28.8 25.4 Deferred (7.6 ) (8.1 ) (21.7 ) 35.1 20.7 3.7 Income tax provision $ 137.9 $ 44.5 $ 31.1 Effective tax rate 53 % 25 % 20 % The difference between the tax provision at the statutory federal income tax rate and the tax provision as a percentage of income before taxes ("effective tax rate") was as follows: Fiscal Years 2017 2016 2015 Statutory federal income tax rate 35 % 35 % 35 % Increase (reduction) in tax rate resulting from: Foreign income taxed at lower rates (15 )% (10 )% (11 )% US State income taxes 1 % 2 % 1 % US Federal research and development credits (3 )% (3 )% (3 )% Stock-based compensation 2 % 3 % 1 % Excess tax benefit related to stock-based compensation (3 )% — % — % Effect of U.S. tax law change 33 % — % — % Foreign audit reserve release — % — % (2 )% Divestiture — % (5 )% — % Valuation allowance release - foreign — % — % (3 )% Other 3 % 3 % 2 % Effective tax rate 53 % 25 % 20 % On December 22, 2017, the U.S. government enacted the 2017 Tax Cuts and Jobs Act (the "Tax Act"). The effective tax rate in fiscal 2017 increased compared to 2016 primarily due to the impact of Tax Act as discussed below and a tax benefit from a divestiture of a non-strategic business in 2016, partially offset by a favorable change in the geographic mix of pretax income and stock-based compensation tax benefits resulting from the adoption of FASB guidance for stock-based compensation. The effective tax rate in fiscal 2016 increased compared to 2015 primarily due to the closing of a foreign audit and valuation allowance release in 2015, increase in nondeductible expense, and a change in the geographic mix of pretax income, partially offset by a tax benefit from a divestiture of a non-strategic business. The Tax Act imposes a one-time mandatory transition tax on accumulated foreign earnings, which resulted a provisional amount of $126.0 million for the Company. In accordance with 2017 Tax Act taxation of foreign accumulated earnings and profits, the Company reversed its deferred tax liabilities associated with foreign earnings and made appropriate adjustments to certain tax reserves. This resulted in a provisional tax benefit of $46.7 million . The Tax Act reduces the corporate tax rate from 35% to 21% effective January 1, 2018. Since the reduced tax rate has been enacted in 2017, the Company re-measured its ending deferred tax assets and liabilities to reflect the realization at the new 21% corporate tax rate. The re-measurement resulted in a provisional $3.3 million charge to reduce its U.S. deferred tax assets. Finally, a provisional amount of $2.4 million in expense was recorded for state tax and foreign withholding taxes. In addition, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Act (“SAB 118”), which allows the Company to record provisional amounts during a measurement period not to extend beyond one year from the enactment date. Since the Tax Act was passed late in the fourth quarter of 2017, ongoing guidance and accounting interpretation are expected over the next year, and significant data and analysis is required to finalize amounts recorded pursuant to the Tax Act, the Company considers the accounting of the transition tax, deferred tax re-measurements, indefinite reinvestment assertion, and other items to be incomplete due to the forthcoming guidance and its ongoing analysis of final year-end data and tax positions. Also, the Company has not yet determined its policy election as to whether it will recognize deferred taxes for basis differences expected to reverse as Global Intangible Low Taxed Income (“GILTI”) or whether GILTI will be accounted for as a period cost if and when incurred. The Company expects to complete its analysis within the measurement period in accordance with SAB 118. Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The significant components of the Company’s deferred tax assets and liabilities are as follows: At the End of Fiscal Year 2017 2016 (In millions) Deferred tax liabilities: Purchased intangibles $ 69.8 $ 91.9 Depreciation and amortization 13.1 11.7 US residual tax on foreign earnings — 11.3 Total deferred tax liabilities 82.9 114.9 Deferred tax assets: Inventory valuation differences 4.6 12.9 Expenses not currently deductible 18.1 27.7 US federal tax credit carryforwards 0.2 0.3 Deferred revenue 5.8 6.9 US state tax credit carryforwards 21.7 15.1 Accrued warranty 2.0 3.1 US federal net operating loss carryforwards 6.4 3.8 Foreign net operating loss carryforwards 20.2 31.2 Stock-based compensation 21.5 31.9 Other (4.4 ) 4.1 Total deferred tax assets 96.1 137.0 Valuation allowance (25.2 ) (30.6 ) Total deferred tax assets 70.9 106.4 Total net deferred tax liabilities $ (12.0 ) $ (8.5 ) Reported as: Non-current deferred income tax assets 28.4 30.3 Non-current deferred income tax liabilities (40.4 ) (38.8 ) Net deferred tax liabilities $ (12.0 ) $ (8.5 ) At the end of fiscal 2017, the Company has federal and foreign net operating loss carryforwards, or NOLs, of approximately $31.3 million and $100.2 million , respectively. The federal NOLs will begin to expire in 2021 . There is, generally, no expiration for the foreign NOLs. Utilization of the Company’s federal and state NOLs is subject to annual limitations in accordance with the applicable tax code. The Company has determined that it is more likely than not that the Company will not realize a portion of the foreign NOLs and, accordingly, a valuation allowance has been established for such amount. The Company has Federal and California research and development credit carryforwards after federal tax benefit of approximately $0.4 million and $24.2 million , respectively. The federal tax credit carryforwards will expire beginning 2030 . The California research tax credits have indefinite carryforward period. The Company believes that it is more likely than not that the Company will not realize a portion of the California research and development credit carryforwards and, accordingly, a valuation allowance has been established for such amount. The total amount of the unrecognized tax benefits at the end of fiscal 2017 was $82.4 million . A reconciliation of gross unrecognized tax benefit is as follows: Fiscal Years 2017 2016 2015 (In millions) Beginning gross balance $ 72.9 $ 59.0 $ 51.4 Increase (decrease) related to prior years' tax positions (0.6 ) 7.5 6.0 Increase related to current year tax positions 12.1 9.9 6.2 Lapse of statute of limitations (1.6 ) (1.4 ) (1.5 ) Settlement with taxing authorities (0.4 ) (2.1 ) (3.1 ) Ending gross balance $ 82.4 $ 72.9 $ 59.0 The Company's total unrecognized tax benefits that, if recognized, would affect its effective tax rate were $68.5 million and $60.5 million at the end of fiscal 2017 and 2016 , respectively. The Company and its subsidiaries are subject to U.S. federal, state, and foreign income taxes. The Company has substantially concluded all U.S. federal income tax audits for years through 2009. State income tax matters have been concluded for years through 2009 and non-U.S. income tax matters have been concluded for years through 2005. The Company is currently in various stages of multiple year examinations by federal, state, and foreign (multiple jurisdictions) taxing authorities. While the Company generally believes it is more likely than not that its tax positions will be sustained, it is reasonably possible that future obligations related to these matters could arise. The Company believes that its reserves are adequate to cover any potential assessments that may result from the examinations and negotiations. In the first quarter of fiscal 2015, the Company received a Notice of Proposed Adjustment from the IRS for the fiscal years 2010 and 2011. The proposed adjustments primarily relate to the valuations of intercompany transfers of acquired intellectual property. The assessments of tax and penalties for the years in question total $67.0 million . In January 2018, the Company and IRS reached agreement to settle certain aspects of the assessments constituting $15.8 million of the total $67.0 million assessment. The Company’s reserves were adequate to cover the agreement. The Company does not agree with the IRS position on the remaining issues, intends to vigorously contest the IRS position, and believes that its reserves are adequate to cover any potential assessments. Although timing of the resolution and/or closure of audits is not certain, the Company believes it is reasonably possible that its gross unrecognized tax benefits could decrease (whether by payment, release or a combination of both) in the next year by up to $6.2 million primarily related to the IRS partial settlement discussed above. The Company’s practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company’s liability for unrecognized tax benefits including interest and penalties was recorded in Other non-current liabilities in the accompanying Consolidated Balance Sheets. At the end of fiscal 2017 and 2016 , the Company had accrued $12.7 million and $9.3 million , respectively, for payment of interest and penalties.

Comprehensive Income

Comprehensive Income	12 Months Ended
	Dec. 29, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income	ACCUMULATED OTHER COMPREHENSIVE LOSS The components of accumulated other comprehensive loss, net of related tax were as follows: At the End of Fiscal Year 2017 2016 (In millions) Accumulated foreign currency translation adjustments $ (127.6 ) $ (216.8 ) Net unrealized loss on short-term investments (0.2 ) — Net unrealized actuarial losses (3.4 ) (3.1 ) Total accumulated other comprehensive loss $ (131.2 ) $ (219.9 )

Employee Stock Benefit Plans

Employee Stock Benefit Plans	12 Months Ended
	Dec. 29, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Benefit Plans	EMPLOYEE STOCK BENEFIT PLANS Stock-Based Compensation Expense The following table summarizes the components of stock-based compensation expense recognized in the Company’s Consolidated Statements of Income for the periods indicated: Fiscal Years 2017 2016 2015 (In millions) Restricted stock units $ 53.3 $ 35.9 $ 27.9 Stock options 5.7 10.9 16.6 ESPP 5.8 5.8 5.6 Total stock-based compensation expense $ 64.8 $ 52.6 $ 50.1 Unrecognized Stock-Based Compensation At the end of fiscal 2017, total unamortized stock-based compensation expense was $111.3 million , with a weighted-average recognition period of 2.6 years . 2002 Stock Plan Trimble’s 2002 Stock Plan (“2002 Plan”), provides for the granting of incentive and non-statutory stock options and restricted stock units ("RSUs") for up to 74.6 million shares plus any shares currently reserved but unissued to employees, consultants, and directors of Trimble. Grants of RSUs reduce the plan reserves by a 1.69 multiplier. Both incentive and non-statutory stock options may be granted at exercise prices that are not less than 100% of the fair market value of Common Stock on the date of grant. Employee stock options under the 2002 plan generally vest over four years with annual or monthly vesting, and expire seven years from the date of grant. RSUs are converted into shares of Trimble common stock upon vesting on a one-for-one basis, except those with market-based or performance-based vesting conditions, in which case the number of shares may be greater. Time-based RSUs granted to employees generally vest over four years , and those granted to non-employee directors generally vest after one year . Market-based and performance-based RSUs granted to executive officers and other senior employees generally vest after two to three years. Additionally, RSUs granted to certain executive officers may vest earlier upon their retirement meeting age and service conditions. As of the end of fiscal 2017, the number of shares available for grant under the 2002 stock plan was 16.1 million . Restricted Stock Units The following table summarizes the Company’s RSU activity during fiscal 2017: Restricted Stock Units Outstanding Restricted Weighted Average (In millions, except for per share data) Outstanding at the beginning of year 4.7 $ 26.40 Granted (1) 2.0 $ 40.19 Shares released, net (1.4 ) $ 28.06 Cancelled and Forfeited (0.2 ) $ 30.58 Outstanding at the end of year 5.1 $ 31.71 (1) During fiscal year 2017, the Company granted approximately 1.3 million time-based RSUs, 0.5 million performance-based RSUs and 0.2 million market-based RSUs. As of fiscal year end 2017, the Company has 1.7 million market-based and performance-based RSUs outstanding and none had vested as of fiscal 2017 year end. The following table summarizes information about restricted stock units outstanding as of fiscal 2017: Number Weighted- (in years) Aggregate Expected to vest (1) 4.7 1.40 $ 192.9 (1) For those shares expected to vest upon the achievement of specified performance goals, the amount represents of estimated number of shares that expect to vest based on the estimated achievement of such specified performance goals as of the end of fiscal 2017. The fair value of restricted stock units expected to vest as of fiscal 2017 is calculated based on the fair value of the Company’s common stock as of the end of fiscal 2017. Fair value of Time-Based Restricted Stock Units and Performance-Based Restricted Stock Units Time-based RSUs are service-based awards and vest over time based on continued employment. Performance-based RSUs ("PSUs") vest upon the achievement of specified performance goals, as well as continued employment, and the expense recognized is based upon the expected achievement of such goals. The fair value of time-based RSUs and PSUs is measured on the grant date using the fair value of Trimble’s common stock. Fair Value of Market-Based Restricted Stock Units RSUs with market-based vesting conditions vest based on the achievement of the Company’s relative total stockholder return ("TSR") of its common stock as compared to the TSR of the constituents of the S&P 500 at the start of the performance period. The fair value of RSUs with market-based vesting conditions is measured on the grant date using a Monte Carlo simulation with the following weighted-average assumptions: Fiscal Years 2017 2016 2015 Expected life of Market-Based Restricted Stock Units 3.0 years 3.1 years 2.6 years Expected stock price volatility 31.46 % 33.8 % 30.9 % Risk free interest rate 1.46 % 0.9 % 0.9 % Expected dividend yield — — — The weighted average grant-date fair value per share of RSUs granted during fiscal years 2017, 2016, and 2015 was $40.19 , $26.13 , and $23.22 per share, respectively. The fair value of all RSUs vested during fiscal years 2017, 2016, and 2015 was $40.4 million , $33.6 million , and $16.3 million , respectively. Stock options The Company did not issue stock options during fiscal 2017. During fiscal 2016 and 2015, stock options issued by the Company were de minimis. The following table summarizes information about stock options outstanding as of fiscal 2017 year end: Number Of Shares (in millions) Weighted- Average Exercise Price per Share Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Outstanding at the beginning of year 7.6 $ 24.60 Option exercised (3.2 ) 22.52 Cancelled and Forfeited — 25.97 Outstanding at the end of year 4.4 26.12 2.17 $ 63.8 Options exercisable 4.1 $ 26.07 2.04 $ 60.1 The total intrinsic value of options exercised during fiscal 2017, 2016 and 2015 was $41.1 million , $36.0 million , and $13.9 million , respectively. Fair Value of Stock Options The fair value of stock options is measured on the grant date using a binomial valuation model. The weighted average grant-date fair value per share of stock options granted during fiscal years 2016 and 2015 was $6.03 , and $7.36 , respectively. The fair value of all stock options vested during fiscal years 2017, 2016 and 2015 was $6.5 million , $14.6 million , and $18.3 million , respectively. Employee Stock Purchase Plan The Company has an Employee Stock Purchase Plan (“Purchase Plan”) under which an aggregate of 39.0 million shares of Common Stock have been approved for issuance to eligible employees as approved by the stockholders to date. The plan permits eligible employees to purchase Common Stock through payroll deductions at 85% of the lower of the fair market value of the Common Stock at the beginning or at the end of each offering period, which is generally six months. Rights to purchase shares are granted during the first and third quarter of each fiscal year. The Purchase Plan terminates on March 15, 2027. In fiscal 2017, 2016, and 2015, 0.8 million , 1.1 million , and 1.0 million shares were issued, respectively, representing $20.4 million , $19.1 million , and $18.1 million in cash received for the issuance of stock under the Purchase Plan. At the end of fiscal 2017, the number of shares reserved for future purchases by eligible employees was 9.0 million . Fair Value of Share Purchase Rights The fair value of the share purchase rights granted under the Purchase Plan are valued using the Black-Scholes option pricing model with the following weighted-average assumptions: Fiscal Years 2017 2016 2015 Expected life of purchase 0.5 years 0.5 years 0.5 years Expected stock price volatility (1) 32.1 % 36.9 % 31.3 % Risk free interest rate 0.70 % 0.41 % 0.08 % Expected dividend yield — — — (1) Expected stock price volatility is based on implied volatilities from traded options on the Company’s stock. The Company used implied volatility because it is representative of future stock price trends during the purchase period.

Common Stock Repurchase

Common Stock Repurchase	12 Months Ended
	Dec. 29, 2017
Statement of Stockholders' Equity [Abstract]
Stockholders' Equity Note Disclosure	COMMON STOCK REPURCHASE In November 2014, the Company's Board of Directors approved a stock repurchase program ("2014 Stock Repurchase Program"), authorizing the Company to repurchase up to $300.0 million of Trimble’s common stock. In August 2015, the Company’s Board of Directors approved a stock repurchase program ("2015 Stock Repurchase Program"), authorizing the Company to repurchase up to $400.0 million of Trimble’s common stock, replacing the 2014 Stock Repurchase Program. In September 2015, the Company entered into an accelerated share repurchase agreement, or ASR, with an investment bank for $75.0 million . In November 2017, the Company’s Board of Directors approved a stock repurchase program ("2017 Stock Repurchase Program"), authorizing the Company to repurchase up to $600.0 million of Trimble’s common stock. The share repurchase authorization does not have an expiration date and replaces the 2015 Stock Repurchase Program, which was completed. Under the share repurchase program, the Company may repurchase shares from time to time in open market transactions, privately negotiated transactions, accelerated share buyback programs, tender offers, or by other means. The timing and amount of repurchase transactions will be determined by the Company’s management based on its evaluation of market conditions, share price, legal requirements and other factors. The program may be suspended, modified or discontinued at any time without prior notice. At the end of fiscal 2017 , the 2017 Stock Repurchase Program had remaining authorized funds of $442.2 million . During fiscal 2017 , the Company repurchased approximately 7.4 million shares of common stock in open market purchases, at an average price of $39.18 per share, for a total of $288.3 million under the 2017 and 2015 Stock Repurchase Programs. During fiscal 2016 , the Company repurchased approximately 4.9 million shares of common stock in open market purchases, at an average price of $24.39 per share, for a total of $119.5 million under the 2015 Stock Repurchase Program. During fiscal 2015 , the Company repurchased approximately 7.5 million shares of common stock in open market purchases, at an average price of $21.29 per share, for a total of $159.4 million . This total includes $75.1 million and $84.3 million of open market purchases completed under the 2015 and 2014 Stock Repurchase Programs, respectively. The ASR was completed in December 2015 and resulted in the aggregate repurchase of approximately 3.7 million shares of common stock with a volume weighted average price of $20.11 per share. Stock repurchases are reflected as a decrease to common stock based on par value and additional-paid-capital based on the average book value per share for all outstanding shares calculated at the time of each individual repurchase transaction. The excess of the purchase price over this average for each repurchase was charged to retained earnings. As a result of the 2017 repurchases, retained earnings was reduced by $246.0 million in fiscal 2017 . Common stock repurchases under the program were recorded based upon the trade date for accounting purposes.

Statement Of Cash Flow Data

Statement Of Cash Flow Data	12 Months Ended
	Dec. 29, 2017
Supplemental Cash Flow Elements [Abstract]
Statement Of Cash Flow Data	STATEMENT OF CASH FLOW DATA Fiscal Years 2017 2016 2015 (In millions) Supplemental disclosure of cash flow information: Interest paid $ 28.4 $ 27.3 $ 26.5 Income taxes paid $ 46.6 $ 57.4 $ 54.0

Selected Quarterly Financial Da

Selected Quarterly Financial Data	12 Months Ended
	Dec. 29, 2017
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) Trimble has a 52-53 week fiscal year, ending on the Friday nearest to December 31. Both fiscal 2017 and 2016 were a 52-week year. First Quarter Second Quarter Third Quarter Fourth Quarter Fiscal Period 2017 2017 2017 2017 (in millions, except per share data) Revenue $ 613.9 $ 661.9 $ 670.0 $ 708.4 Gross margin 326.6 346.5 349.5 370.0 Net income (loss) attributable to Trimble Inc. 50.5 49.9 55.7 (35.0 ) Basic net income (loss) per share 0.20 0.20 0.22 (0.14 ) Diluted net income (loss) per share 0.20 0.19 0.22 (0.14 ) First Quarter Second Quarter Third Quarter Fourth Quarter Fiscal Period 2016 2016 2016 2016 (in millions, except per share data) Revenue $ 583.0 $ 609.6 $ 584.1 $ 585.5 Gross margin 300.6 315.6 309.0 312.8 Net income attributable to Trimble Inc. 19.8 35.7 39.2 37.7 Basic net income per share 0.08 0.14 0.16 0.15 Diluted net income per share 0.08 0.14 0.15 0.15

Subsequent Events (Notes)

Subsequent Events (Notes)	12 Months Ended
	Dec. 29, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS On February 2, 2018, the Company entered into a Stock Purchase Agreement (the “Purchase Agreement”) with e-Builder, Inc., a Florida corporation (“e-Builder”), and the stockholders of e-Builder identified therein. Upon the terms and subject to conditions set forth in the Purchase Agreement, Trimble acquired all of the issued and outstanding shares of common stock of e-Builder for a total purchase price of $500.0 million , subject to certain adjustments described in the Purchase Agreement. The Purchase Agreement contains representations, warranties and covenants by the parties that are customary for a transaction of this nature. The acquisition closed on February 2, 2018 and e-Builder is now a wholly-owned subsidiary of Trimble. e-Builder is a SaaS-based construction program management solution for capital program owners and program management firms. e-Builder extends the Company’s ability to accelerate industry transformation by providing an integrated project delivery solution for owners, program managers and contractors across the design, construct and operate lifecycle. The e-Builder business will be reported as part of the Buildings and Infrastructure segment. On February 2, 2018, the Company entered into a $300.0 million Revolving Credit Agreement, by and between the Company and The Bank of Nova Scotia. The Credit Agreement provides for an unsecured revolving loan facility in the aggregate principal amount of $300.0 million . As of February 2, 2018, after giving effect to the borrowings made on the closing date, the Company had outstanding $300.0 million aggregate principal amount of revolving loans under this credit facility. The Company may borrow, repay and reborrow funds under the 2018 Interim Credit Facility until its maturity on January 31, 2019. Borrowings under the 2018 Interim Credit Facility will bear interest, at the Company's option, at either: (i) a floating per annum base rate determined by reference to the highest of: (a) The Bank of Nova Scotia’s prime rate; (b) 0.50% per annum above the federal funds effective rate; and (c) LIBOR for an interest period of one month ; plus a margin equal to 0.125% , (ii) a fixed per annum rate based on LIBOR plus a margin of 1.125% or (iii) an interest rate agreed between us and The Bank of Nova Scotia. The 2018 Interim Credit Facility contains various customary representations and warranties and affirmative and negative covenants that are substantially the same as those contained in the 2014 Credit Facility.

Valuation And Qualifying Accoun

Valuation And Qualifying Accounts	12 Months Ended
	Dec. 29, 2017
Valuation and Qualifying Accounts [Abstract]
Valuation And Qualifying Accounts	SCHEDULE II TRIMBLE INC. VALUATION AND QUALIFYING ACCOUNTS (in millions) Fiscal Years 2017 2016 2015 Allowance for doubtful accounts: Balance at beginning of period $ 5.0 $ 5.0 $ 7.8 Acquired allowance 0.3 0.3 0.6 Bad debt expense 1.2 3.0 1.9 Write-offs, net of recoveries (2.9 ) (3.3 ) (5.3 ) Balance at end of period $ 3.6 $ 5.0 $ 5.0

Accounting Policies (Policy)

Accounting Policies (Policy)	12 Months Ended
	Dec. 29, 2017
Accounting Policies [Abstract]
Use Of Estimates	Use of Estimates The preparation of financial statements in accordance with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Estimates are used for allowances for doubtful accounts, sales returns reserve, allowances for inventory valuation, warranty costs, investments, goodwill impairment, intangibles impairment, purchased intangibles, stock-based compensation, and income taxes among others. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management’s best knowledge of current events and actions that may impact the company in the future, actual results may differ materially from management’s estimates.
Basis Of Presentation	Basis of Presentation The Company has a 52-53 week fiscal year, ending on the Friday nearest to December 31. Fiscal 2017 , 2016 and 2015 were all 52-week years, and ended on December 29, 2017 , December 30, 2016 and January 1, 2016 , respectively. Unless otherwise stated, all dates refer to the Company’s fiscal year. These consolidated financial statements include the results of the Company and its consolidated subsidiaries. Inter-company accounts and transactions have been eliminated. Noncontrolling interests represent the noncontrolling stockholders’ proportionate share of the net assets and results of operations of the Company’s consolidated subsidiaries. The Company has presented revenue and cost of sales separately for products, service and subscriptions. Product revenue includes hardware, software licenses, parts and accessories; service revenue includes maintenance and support for hardware and software products, training and professional services; subscription revenue includes software as a service ("SaaS"). Certain immaterial amounts from prior periods have been reclassified to conform to the current period presentation, including certain line items within the Consolidated Statements of Cash Flows, due to the adoption of accounting for certain aspects of the share-based payments awards, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements.
Reportable Segments	Reportable Segments In March 2017, the Company effected a change in its financial reporting segments to better reflect the Company’s customer base and end markets. Over time, the Company has experienced growth both organically and through strategic business acquisitions, resulting in an increasingly diversified business model. As a result of the Company’s evolution, Trimble’s chief operating decision maker (its Chief Executive Officer) changed the information he regularly reviews to allocate resources and assess performance. Beginning with the first quarter of fiscal 2017, the Company is reporting its financial performance, including revenues and operating income, based on four new reportable segments: Buildings and Infrastructure, Geospatial, Resources and Utilities, and Transportation. Comparative period financial information by reportable segment has been recast to conform with the current presentation. See Note 6 of the Notes to consolidated financial statements for further information.
Foreign Currency Translation	Foreign Currency Translation Assets and liabilities of non-U.S. subsidiaries that operate in local currencies are translated to U.S. dollars at exchange rates in effect at the balance sheet date, with the resulting translation adjustments, net of tax, recorded in Accumulated other comprehensive loss within the stockholders’ equity section of the Consolidated Balance Sheets. Income and expense accounts are translated at average monthly exchange rates during the year.
Derivative Financial Instruments	Derivative Financial Instruments The Company enters into foreign exchange forward contracts to minimize the short-term impact of foreign currency fluctuations on cash, certain trade and inter-company receivables and payables, primarily denominated in Euro, British pound, New Zealand dollars and Canadian dollars. These contracts reduce the exposure to fluctuations in exchange rate movements as the gains and losses associated with foreign currency balances are generally offset with the gains and losses on the forward contracts. These instruments are marked to market through earnings every period and generally range from one to two months in original maturity. The Company occasionally enters into foreign exchange forward contracts to hedge the purchase price of some of its larger business acquisitions. The Company does not enter into foreign exchange forward contracts for trading purposes. As of the fiscal years ended 2017 and 2016 , there were no derivative financial instruments outstanding that were accounted for as hedges.
Cash, Cash Equivalents and Short-Term Investments	Cash, Cash Equivalents and Short-Term Investments The Company's cash equivalents and short-term investments consisted primarily of treasury bills, debt securities and commercial paper, interest and non-interest bearing bank deposits as well as bank time deposits. The Company classifies all investments that are considered readily convertible to known amounts of cash and have stated maturities of three months or less from the date of purchase as cash equivalents and those with stated maturities of greater than three months as short-term investments based on the nature of the investments and their availability for use in current operations. The Company has classified and accounted for such investments in cash equivalents and short-term investments as available-for-sale securities. The carrying amount of cash and cash equivalents approximates fair value because of the short maturity of those instruments. The Company determines the appropriate classification of its short-term investments at the time of purchase and reevaluates such designation at each balance sheet date. These investments are carried at fair value, and any unrealized gains and losses, net of taxes, are reported in Accumulated other comprehensive loss, except for unrealized losses determined to be other-than-temporary, which would be recorded within Other income, net. The Company has not recorded any such impairment charge in the fiscal year 2017 . Realized gains or losses on the sale of marketable securities are determined on a specific identification method, and such gains and losses are recorded as a component of Other income, net. The fair value of the Notes was determined based on observable market prices in less active markets and is categorized accordingly as Level II in the fair value hierarchy. The fair value of the bank borrowings and promissory notes has been calculated using an estimate of the interest rate the Company would have had to pay on the issuance of notes with a similar maturity and discounting the cash flows at that rate, and is categorized as Level II in the fair value hierarchy. The fair values do not give an indication of the amount that the Company would currently have to pay to extinguish any of this debt.
Concentration Of Risk	Concentrations of Risk The Company is subject to concentrations of credit risk primarily from cash and cash equivalents, short-term investments and accounts receivable. The Company's cash equivalents and short-term investments consisted primarily of treasury bills, debt securities and commercial paper, interest and non-interest bearing bank deposits as well as bank time deposits. The main objective of these instruments is safety of principal and liquidity while maximizing return, without significantly increasing risk. Deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions of reputable credit and therefore bear minimal credit risk. The Company's investment policy requires the portfolio to include only securities with high credit quality and a weighted average maturity not to exceed six months, with the main objective of preserving capital and maintaining liquidity. The Company maintains an investment portfolio of various holdings, types, and maturities. The Company is also exposed to credit risk in the Company’s trade receivables, which are derived from sales to end-user customers in diversified industries as well as various resellers. The Company performs ongoing credit evaluations of its customers’ financial condition and limits the amount of credit extended when deemed necessary but generally does not require collateral. With Flex Ltd. as an exclusive manufacturing partner for many of its products, the Company is dependent upon a sole supplier for the manufacture of these products. In addition, the Company relies on sole suppliers for a number of its critical components.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The allowance for doubtful accounts was $3.6 million and $5.0 million at the end of fiscal 2017 and 2016 , respectively. The sales return reserve was $4.2 million and $3.6 million at the end of fiscal 2017 and 2016 , respectively. The Company evaluates the ongoing collectibility of its trade accounts receivable based on a number of factors such as age of the accounts receivable balances, credit quality, historical experience, and current economic conditions that may affect a customer’s ability to pay. In circumstances where the Company is aware of a specific customer’s inability to meet its financial obligations to the Company, a specific allowance for bad debts is estimated and recorded which reduces the recognized receivable to the estimated amount that the Company believes will ultimately be collected. In addition to specific customer identification of potential bad debts, bad debt charges are recorded based on the Company’s recent past loss history and an overall assessment of past due trade accounts receivable amounts outstanding.
Inventories	Inventories Inventories are stated at the lower of cost or net realizable value. Adjustments are also made to reduce the cost of inventory for estimated excess or obsolete balances. Factors influencing these adjustments include declines in demand which impact inventory purchasing forecasts, technological changes, product life cycle and development plans, component cost trends, product pricing, physical deterioration and quality issues. If the Company's estimates used to reserve for excess and obsolete inventory are different from what it expected, the Company may be required to recognize additional reserves, which would negatively impact its gross margin.
Property And Equipment, Net	Property and Equipment, Net Property and equipment, net is stated at cost less accumulated depreciation. Depreciation of property and equipment is computed using the straight-line method over the shorter of the estimated useful lives or the lease terms when applicable. Useful lives generally include a range from four to six years for machinery and equipment, five to seven years for furniture and fixtures, two to five years for computer equipment and software, thirty-nine years for buildings, and the life of the lease for leasehold improvements. The Company capitalizes eligible costs to acquire or develop internal-use software that are incurred subsequent to the preliminary project stage. Capitalized costs related to internal-use software are amortized using the straight-line method over the estimated useful lives of the assets, which range generally from two to five years. The costs of repairs and maintenance are expensed when incurred, while expenditures for refurbishments and improvements that significantly add to the productive capacity or extend the useful life of an asset are capitalized. Depreciation expense was $34.6 million in fiscal 2017 , $37.0 million in fiscal 2016 and $36.7 million in fiscal 2015 .
Lease Obligations	Lease Obligations The Company enters into lease arrangements for office space, facilities, and equipment under non-cancelable capital and operating leases. Certain of the operating lease agreements contain rent holidays, rent escalation provisions, and purchase options. Rent holidays and rent escalation provisions are considered in determining the straight-line rent expense to be recorded over the lease term. The lease term begins on the date of initial possession of the leased property for purposes of recognizing lease expense on a straight-line basis over the term of the lease. The Company does not assume renewals in its determination of the lease term unless the renewals are deemed to be reasonably assured at lease inception.
Business Combinations	Business Combinations The Company allocates the fair value of purchase consideration to the assets acquired, liabilities assumed, and non-controlling interests in the acquiree based on their fair values at the acquisition date. The excess of the fair value of purchase consideration over the fair value of these assets acquired, liabilities assumed and non-controlling interests in the acquiree is recorded as goodwill. When determining the fair values of assets acquired, liabilities assumed, and non-controlling interests in the acquiree, management makes significant estimates and assumptions, especially with respect to intangible assets. Critical estimates in valuing intangible assets include, but are not limited to, expected future cash flows, which includes consideration of future growth rates and margins, customer attrition rates, future changes in technology and brand awareness, loyalty and position, and discount rates. Fair value estimates are based on the assumptions management believes a market participant would use in pricing the asset or liability. Amounts recorded in a business combination may change during the measurement period, which is a period not to exceed one year from the date of acquisition, as additional information about conditions existing at the acquisition date becomes available. The Company determined the total consideration paid for each of its acquisitions as well as the fair value of the assets acquired and liabilities assumed as of the date of each acquisition. For certain acquisitions completed in fiscal 2017 , the fair value of the assets acquired and liabilities assumed are preliminary and may be adjusted as the Company obtains additional information, primarily related to adjustments for the true up of acquired net working capital in accordance with certain purchase agreements, and estimated values of certain net tangible assets and liabilities including tax balances, pending the completion of final studies and analyses. If there are adjustments made for these items the fair value of intangible assets and goodwill could be impacted. Thus the provisional measurements of fair value set forth below are subject to change. Such changes could be significant. The Company expects to finalize the valuation of the net tangible and intangible assets as soon as practicable, but not later than one -year from the acquisition date. The fair value of identifiable assets acquired and liabilities assumed were determined under the acquisition method of accounting for business combinations. The excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill. The fair value of intangible assets acquired is generally determined based on a discounted cash flow analysis. Acquisition costs of $7.4 million , $6.8 million and $9.9 million in fiscal 2017 , 2016 and 2015 , respectively, were expensed as incurred, along with the changes in fair value of the contingent consideration liabilities, and are included in General and administrative expenses in the Consolidated Statements of Income.
Goodwill And Purchased Intangible Assets	Goodwill and Purchased Intangible Assets Goodwill represents the excess of the purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. Intangible assets acquired individually, with a group of other assets, or in a business combination are recorded at fair value. Identifiable intangible assets are comprised of distribution channels and distribution rights, patents, licenses, technology, acquired backlog, trademarks and in-process research and development. Identifiable intangible assets are being amortized over the period of estimated benefit using the straight-line method, reflecting the pattern of economic benefits associated with these assets, and have estimated useful lives ranging from four years to eight years with a weighted average useful life of 6.1 years. Goodwill is not subject to amortization, but is subject to at least an annual assessment for impairment, applying a fair-value based test.
Impairment Of Goodwill, Intangible Assets And Other Long-Lived Assets	Impairment of Goodwill, Intangible Assets and Other Long-Lived Assets The Company evaluates goodwill, at a minimum, on an annual basis and whenever events and changes in circumstances suggest that the carrying amount may not be recoverable. The Company performs its annual goodwill impairment testing in the fourth fiscal quarter of each year based on the values on the first day of that quarter. For the Company's annual goodwill impairment test in the fourth quarter of fiscal 2017 , goodwill was reviewed for impairment utilizing a quantitative two-step process. In the first step of this test, goodwill is tested for impairment at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair value of the reporting unit. The fair values of the reporting units are estimated using a discounted cash flow approach. If the carrying amount of the reporting unit exceeds its fair value, a second step is performed to measure the amount of impairment loss, if any. In step two, the implied fair value of goodwill is calculated as the excess of the fair value of a reporting unit over the fair values assigned to its assets and liabilities. If the implied fair value of goodwill is less than the carrying value of the reporting unit’s goodwill, the difference is recognized as an impairment loss. When the Company performs a quantitative assessment of goodwill impairment, the determination of fair value of a reporting unit involves the use of significant estimates and assumptions. The discounted cash flows are based upon, among other things, assumptions about expected future operating performance using risk-adjusted discount rates. Actual future results may differ from those estimates. As of the first day of the fourth quarter of fiscal 2017 , the fair value for our reporting units ranged from 311% to approximately 903% of carrying amounts, therefore goodwill was not impaired and no further testing was required. Depreciation and amortization of the Company’s intangible assets and other long-lived assets is provided using the straight-line method over their estimated useful lives, reflecting the pattern of economic benefits associated with these assets. Changes in circumstances such as technological advances, changes to the Company’s business model, or changes in the capital strategy could result in the actual useful lives differing from initial estimates. In cases where the Company determines that the useful life of an asset should be revised, the Company will depreciate the net book value in excess of the estimated residual value over its revised remaining useful life. These assets are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The estimated future cash flows are based upon, among other things, assumptions about expected future operating performance and these estimates may differ from actual future cash flows. The assets evaluated for impairment are grouped with other assets to the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. If the sum of the projected undiscounted cash flows (excluding interest) is less than the carrying value of the assets, the assets will be written down to the estimated fair value.
Warranty	Warranty The Company accrues for warranty costs as part of its cost of sales based on associated material product costs, technical support labor costs, and costs incurred by third parties performing work on the Company’s behalf. The Company’s expected future cost is primarily estimated based upon historical trends in the volume of product returns within the warranty period and the cost to repair or replace the equipment. When products sold include warranty provisions, they are covered by a warranty for periods ranging generally from one year to two years. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of component suppliers, its warranty obligation is affected by product failure rates, material usage, and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage, or service delivery costs differ from the estimates, revisions to the estimated warranty accrual and related costs may be required. Changes in the Company’s product warranty liability during the fiscal years ended 2017 and 2016 are as follows: Fiscal Years 2017 2016 (In millions) Beginning balance $ 17.2 $ 18.5 Acquired warranties 0.5 (0.2 ) Accruals for warranties issued 20.4 18.3 Changes in estimates (0.8 ) 0.3 Warranty settlements (in cash or in kind) (19.0 ) (19.7 ) Ending Balance $ 18.3 $ 17.2
Guarantees, Including Indirect Guarantees Of Indebtedness Of Others	Guarantees, Including Indirect Guarantees of Indebtedness of Others In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, lessors, and parties to other transactions with the Company. For example, the Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made by certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. In addition, the Company has entered into indemnification agreements with its officers and directors, and the Company’s bylaws contain similar indemnification obligations to the Company’s agents. It is not possible to determine the maximum potential exposure under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under these agreements have not been material and no liabilities have been recorded on the Consolidated Balance Sheets at the end of fiscal 2017 and 2016 .
Revenue Recognition	Revenue Recognition The Company recognizes revenue when it is realized or realizable and earned. The Company considers revenue realized or realizable and earned when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable, and collectibility is reasonably assured. In instances where final acceptance of the product is specified by the customer or is uncertain, revenue is deferred until all acceptance criteria have been met. Contracts and/or customer purchase orders are used to determine the existence of an arrangement. Shipping documents and customer acceptance, when applicable, are used to verify delivery. The Company assesses whether the fee is fixed or determinable based on the payment terms associated with the transaction and whether the sales price is subject to refund or adjustment. The Company assesses collectibility based primarily on the creditworthiness of the customer as determined by credit checks and analyses, as well as the customer’s payment history. Revenue for orders is not recognized until the product is shipped and title has transferred to the buyer. The Company bears all costs and risks of loss or damage to the goods up to that point. The Company’s shipment terms for U.S. orders and international orders fulfilled from the Company’s European distribution center typically provide that title passes to the buyer upon delivery of the goods to the carrier named by the buyer at the named place or point. If no precise point is indicated by the buyer, delivery is deemed to occur when the carrier takes the goods into its charge from the place determined by the Company. Other shipment terms may provide that title passes to the buyer upon delivery of the goods to the buyer. Shipping and handling costs are included in Cost of sales. Revenue from sales to distributors and dealers is recognized upon shipment, assuming all other criteria for revenue recognition have been met. Distributors and dealers do not have a right of return. Revenue from purchased extended warranty and post contract support ("PCS") agreements is deferred and recognized ratably over the term of the warranty or support period. Revenue from the Company's subscription services related to its hardware and software applications is recognized ratably over the term of the subscription service period beginning on the date that service is made available to the customer, assuming all revenue recognition criteria have been met. The Company presents revenue net of sales taxes and any similar assessments. The Company’s software arrangements generally consist of a perpetual license fee and PCS. The Company generally has established vendor-specific objective evidence ("VSOE") of fair value for the Company’s PCS contracts based on the renewal rate. The remaining value of the software arrangement is allocated to the license fee using the residual method. License revenue is primarily recognized when the software has been delivered and fair value has been established for all remaining undelivered elements. In cases where VSOE of fair value for PCS is not established, revenue is recognized ratably over the PCS period after all software deliverables have been made and the only the undelivered element is PCS. For services performed on a fixed-fee basis, revenue is recognized using the proportional performance method, with performance measured based on hours of work performed. For contracts that involve significant customization and implementation or consulting services that are essential to the functionality of the software, the license and services revenues are recognized using the percentage-of-completion method or, if we are unable to reliably estimate the costs to complete the services, we use the completed-contract method of accounting. A contract is considered complete when all significant costs have been incurred or when acceptance from the customer has been received. Some of the Company’s subscription product offerings include hardware, subscription services and extended warranty. Under these hosted arrangements, the customer typically does not have the contractual right to take possession of the software at any time during the hosting period without incurring a significant penalty and it is not feasible for the customer to run the software either on its own hardware or on a third-party’s hardware. The Company’s multiple deliverable product offerings include hardware with embedded firmware, extended warranty, software, PCS and subscription services, which are considered separate units of accounting. For certain of the Company’s products, software and non-software components function together to deliver the tangible product’s essential functionality. In evaluating the revenue recognition for the Company's hardware or subscription agreements which contain multiple deliverables, the Company determined that in certain instances the Company was not able to establish VSOE for some or all deliverables in an arrangement as the Company infrequently sold each element on a standalone basis, did not price products within a narrow range, or had a limited sales history. When VSOE cannot be established, the Company attempts to establish the selling price of each element based on relevant third-party evidence ("TPE"). TPE is determined based on competitor prices for similar deliverables when sold separately. The Company’s offerings may contain a significant level of proprietary technology, customization or differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine what similar competitor products’ selling prices are on a stand-alone basis. Therefore, the Company typically is not able to establish the selling price of an element based on TPE. When the Company is unable to establish selling price using VSOE or TPE, the Company uses its best estimate of selling price ("BESP") in the Company’s allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. BESP is generally used for offerings that are not typically sold on a stand-alone basis or for new or highly customized offerings. The Company determines BESP for a product or service by considering multiple factors including, but not limited to, pricing practices, market conditions, competitive landscape, internal costs, geographies and gross margin. The determination of BESP is made through consultation with and formal approval by the Company’s management, taking into consideration the Company’s go-to-market strategy.
Advertising and Promotional Costs	Advertising and Promotional Costs The Company expenses all advertising and promotional costs as incurred. Advertising and promotional expense was approximately $37.2 million , $37.2 million , and $32.3 million , in fiscal 2017 , 2016 and 2015 , respectively.
Research And Development Costs	Research and Development Costs Research and development costs are charged to expense as incurred. Cost of software developed for external sale subsequent to reaching technical feasibility were not significant and were expensed as incurred. The Company received third party funding of approximately $18.1 million , $13.0 million , and $12.5 million in fiscal 2017 , 2016 and 2015 , respectively. The Company offsets research and development expense with any third party funding earned. The Company retains the rights to any technology developed under such arrangements.
Stock-Based Compensation	Stock-Based Compensation The Company has employee stock benefit plans, which are described more fully in "Note 13: Employee Stock Benefit Plans." Stock compensation expense recognized in the Consolidated Statements of Income is based on the fair value of the portion of share-based payment awards expected to vest during the period, net of estimated forfeitures. The Company attributes the fair value of stock options and restricted stock units ("RSUs") to expense using the straight-line method. The fair value for time-based and performance-based RSUs ("PSUs") is measured at the grant date using the fair value of Trimble’s common stock, with total expense for PSUs based upon the expected achievement of the underlying performance goals as adjusted in future periods for changes in expectations and actual achievement. The fair value for restricted stock units with market-based vesting conditions is measured at the grant date using a Monte Carlo simulation. The grant date fair value for options is estimated using the binomial valuation model. The fair value of rights to purchase shares under the Employee Stock Purchase Plan ("ESPP") is estimated using the Black-Scholes option-pricing model. The Company estimates forfeitures at the date of grant and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical and current information to estimate forfeitures. Fair Value of Share Purchase Rights The fair value of the share purchase rights granted under the Purchase Plan are valued using the Black-Scholes option pricing model with the following weighted-average assumptions: Fiscal Years 2017 2016 2015 Expected life of purchase 0.5 years 0.5 years 0.5 years Expected stock price volatility (1) 32.1 % 36.9 % 31.3 % Risk free interest rate 0.70 % 0.41 % 0.08 % Expected dividend yield — — — (1) Expected stock price volatility is based on implied volatilities from traded options on the Company’s stock. The Company used implied volatility because it is representative of future stock price trends during the purchase period.
Income Taxes	Income Taxes Income taxes are accounted for under the liability method whereby deferred tax assets or liability account balances are calculated at the balance sheet date using current tax laws and rates in effect for the year in which the differences are expected to affect taxable income. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets if it is more likely than not such assets will not be realized. The Company’s valuation allowance is primarily attributable to foreign net operating losses and state research and development credit carryforwards. Management believes that it is more likely than not that the Company will not realize certain of these deferred tax assets, and, accordingly, a valuation allowance has been provided for such amounts. Valuation allowance adjustments associated with an acquisition after the measurement period are recorded through income tax expense. Relative to uncertain tax positions, the Company only recognizes a tax benefit if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and may not accurately forecast actual tax audit outcomes. Determining whether an uncertain tax position is effectively settled requires judgment. Changes in recognition or measurement of the Company's uncertain tax positions would result in the recognition of a tax benefit or an additional charge to the tax provision. The Company’s practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company is subject to income taxes in the U.S. and numerous other countries, and is subject to routine corporate income tax audits in many of these jurisdictions. The Company generally believes that positions taken on its tax returns are more likely than not to be sustained upon audit, but tax authorities in some circumstance have, and may in the future, successfully challenge these positions. Accordingly, the Company’s income tax provision includes amounts intended to satisfy assessments that may result from these challenges. Determining the income tax provision for these potential assessments and recording the related effects requires management judgments and estimates. The amounts ultimately paid on resolution of an audit could be materially different from the amounts previously included in the Company’s income tax provision and, therefore, could have a material impact on its income tax provision, net income and cash flows. The Company’s accrual for uncertain tax positions includes uncertainties concerning the tax treatment of our international operations, including the allocation of income among different jurisdictions, intercompany transactions and related interest. See Note 11 of the Notes to consolidated financial statements for additional information.
Computation Of Earnings Per Share	Computation of Earnings Per Share The number of shares used in the calculation of basic earnings per share represents the weighted average common shares outstanding during the period and excludes any potentially dilutive securities. The dilutive effects of outstanding stock options, shares to be purchased under the Company’s employee stock purchase plan and restricted stock units are included in diluted earnings per share.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Fiscal 2017 Adoption Inventory In July 2015, the FASB issued amendments to simplify the measurement of inventory. Under the amendments, inventory will be measured at the “lower of cost or net realizable value” and options that existed for “market value” are eliminated. The guidance defines net realizable value as the “estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation”. The Company adopted the amendments beginning in the first quarter of fiscal 2017. The adoption did not have a material impact on the Company's consolidated financial statements. Derivatives and Hedging In March 2016, the FASB issued amendments to its guidance on the accounting for derivatives and hedging. The new guidance clarifies the requirements for assessing whether contingent call or put options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. The Company adopted the amendments beginning in the first quarter of fiscal 2017. The adoption did not have a material impact on the Company's consolidated financial statements. Investments - Equity Method and Joint Ventures In March 2016, the FASB issued new guidance related to equity investments and joint ventures. This standard eliminates the requirement that when an existing cost method investment qualifies for use of the equity method, an investor must restate its historical financial statements, as if the equity method had been used during all previous periods. Under the new guidance, at the point an investment qualifies for the equity method, any unrealized gain or loss in accumulated other comprehensive income is recognized through earnings. The Company adopted the amendments beginning in the first quarter of fiscal 2017. The adoption did not have a material impact on the Company's consolidated financial statements. Compensation - Stock Compensation In March 2016, the FASB issued new guidance that changes certain aspects of the accounting for share-based payments awards, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The Company adopted the amendments beginning in the first quarter of fiscal 2017 and elected to apply the presentation requirements for cash flows related to excess tax benefits retrospectively to all periods presented which resulted in an increase to both net cash from operations and net cash used in financing of $6.5 million and $2.1 million for fiscal years ended 2016 and 2015 respectively. The presentation requirements for cash flows related to employee taxes paid for withheld shares had no impact to any of the periods presented on its Consolidated Statements of Cash Flows since such cash flows have historically been presented as a financing activity. Adoption of the new standard resulted in the recognition of excess tax benefits in the Company's provision for income taxes rather than paid-in capital of $8.9 million for fiscal year ended 2017. Consolidation In October 2016, the FASB issued amendments to its guidance on the accounting for related parties, which amends the consolidation guidance issued in February 2015 regarding the treatment of indirect interests held through related parties that are under common control. The Company adopted the amendments beginning in the first quarter of fiscal 2017. The adoption did not have a material impact on the Company's consolidated financial statements. Fiscal 2018 Adoption Revenue from Contracts with Customers In May 2014, the FASB issued a comprehensive new revenue recognition standard that replaces the current revenue recognition guidance under U.S. GAAP. The new standard requires companies to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new standard may be applied either retrospectively to each prior period presented or with the cumulative effect recognized as of the date of initial application. The Company plans to adopt this accounting standard update in the first quarter of fiscal 2018 using the full retrospective adoption method. The Company does not anticipate that its internal control framework will materially change, but rather existing internal controls will be modified and augmented as necessary to implement the new revenue standard. While the Company continues to assess all potential impacts of the standard, it is currently anticipated that the standard will not have a material impact on its Consolidated Statements of Income or Statements of Cash Flows. However, it does anticipate that the standard will have a material impact on the Consolidated Balance Sheets with the primary impacts due to a reduction in deferred revenue for revenue streams that will be recognized sooner under the new standard, which is currently estimated at between $40.0 million and $55.0 million , and capitalization of incremental costs to obtain customer contracts, which is currently estimated at between $30.0 million and $40.0 million . Although it is expected that the annual revenue impacts on the Consolidated Statements of Income will be not be material, the timing of a portion of revenue may shift between periods due primarily to the accounting for software term licenses, custom professional service contracts, and non-standard terms and conditions. Under the new standard, software term license revenue will be recognized predominantly at the time of delivery rather than ratably over the contract period as is required under the current standard. Some custom professional service contracts are expected to be recognized over time rather than at contract completion. The majority of revenue, which is related to hardware, software perpetual licenses, SaaS, and other service and support offerings, will remain substantially unchanged. Additionally, incremental costs to obtain customer contracts will be capitalized and amortized over a benefit period, which is the shorter of customer or product life. The Company will elect a practical expedient to exclude contracts with a benefit period of a year or less from this deferral requirement for both retrospective and future financial statement periods. The annual cost impact of the deferral and amortization on the Consolidated Statements of Income is not expected to be material. Financial Instruments - Overall In January 2016, the FASB issued new guidance that will require entities to measure equity investments currently accounted for under the cost method at fair value and recognize any changes in fair value in net income. For equity investments without readily determinable fair values, an entity may elect measurement at cost minus impairment, if any, plus or minus any adjustments from observable market transactions. The Company plans to adopt this standard in the first quarter of fiscal 2018 on a prospective basis as required specifically for equity investments. Since none of its equity investments have readily determinable fair values, the Company will elect to measure equity investments at cost less any impairments unless an observable transaction occurs, at which time, the Company would remeasure the investment through net income. The Company’s equity investments are immaterial on its consolidated balance sheets; therefore, adoption of this guidance will not have a material impact. Additionally, other provisions of this standard will not have a material impact for the Company’s consolidated financial statements. Statement of Cash Flows In August 2016, the FASB issued new guidance related to statement of cash flows. This guidance amended the existing accounting standard for the statement of cash flows by providing unified guidance for classification of certain cash receipts and cash payments. The Company will adopt this guidance in the first quarter of fiscal 2018, retrospectively. The impact of the related amendments will include, for all periods presented, (a) a reclassification of contingent consideration payments made after business combinations by decreasing net cash used in investing activities and increasing net cash used in financing activities, and (b) a reclassification of dividends received from equity method investees by decreasing net cash provided by investing activities and increasing net cash provided by operating activities. Accounting for Income Taxes - Intra-Entity Asset Transfers In October 2016, the FASB issued new guidance related to income taxes. This standard requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. The guidance is effective and will be adopted by the Company in its first quarter of fiscal 2018 by using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the effective date. Although the Company expects that the deferred tax assets will increase, the adoption of this guidance will not have a material impact on the Company’s consolidated financial statements. Other Income - Gains and Losses from the Derecognition of Non-financial Assets In February 2017, the FASB issued new guidance clarifying the scope and application of existing guidance related to the sale or transfer of non-financial assets to non-customers that is not a sale of a business, including partial sales and transfers of non-financial assets to joint ventures. The amendments are effective at the same time as the new revenue recognition guidance, which the Company expects to adopt in the first quarter of fiscal 2018. The adoption of this guidance will not have a material impact on the Company’s consolidated financial statements. Compensation - Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost In March 2017, the FASB issued new guidance to improve the presentation for components of defined benefit pension cost, which requires employers to report the service cost component of net periodic pension cost in the same line item as other compensation expense arising from services rendered during the period. The standard also requires the other components of net periodic cost be presented in the income statement separately from the service cost component and outside of a subtotal of income from operations. The guidance is effective and will be adopted by the Company in its first quarter of fiscal 2018 on a retrospective basis. The Company has defined benefit pension plans that are immaterial for its consolidated financial statements; therefore, adoption of this guidance will not have a material impact. Future Adoption Leases In February 2016, the FASB issued new guidance that requires a lessee to recognize lease assets and lease liabilities on the balance sheet for most leases and provide enhanced disclosures. Most prominent is the recognition of assets and liabilities by lessees for those leases classified as operating leases under previous U.S. GAAP. Under the new standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. Leases will continue to be classified as either finance or operating leases, and for both, the initial lease liabilities should be measured at the present value of the lease payments. This new guidance is effective beginning in fiscal 2019, although early adoption is permitted. Companies are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements and there are certain practical expedients that companies may elect, including an accounting policy election to not recognize lease assets and liabilities for leases with a term of twelve months or less. While the Company is continuing to assess all potential impacts of the standard, it currently anticipates that the standard will have a material effect on its consolidated balance sheets, with the most significant impact related to the accounting for real estate lease assets and liabilities. The Company plans to adopt the standard in fiscal 2019 and is evaluating the use of optional practical expedients. Financial Instruments - Credit Losses In June 2016, the FASB issued new guidance that requires credit losses on financial assets measured at amortized cost basis to be presented based on the net amount expected to be collected, not based on incurred losses. Further, credit losses on available-for-sale debt securities should be recorded through an allowance for credit losses limited to the amount by which fair value is below amortized cost. The new standard is effective for the Company beginning in fiscal 2020. Early adoption for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018 is permitted. The Company is currently evaluating the effect of the updated standard on its consolidated financial statements. Intangibles - Goodwill and Other In January 2017, the FASB issued new guidance to that simplifies the accounting for goodwill impairment by requiring impairment charges to be based on the first step in today’s two-step impairment test. The impairment test is performed by comparing the fair value of a reporting unit with its carrying amount and an impairment charge would be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value. The new standard is to be applied on a prospective basis and is effective for the Company beginning in fiscal 2020 and early adoption is permitted. The Company currently anticipates that the adoption will not have a material impact on its consolidated financial statements.

Accounting Policies (Tables)

Accounting Policies (Tables)	12 Months Ended
	Dec. 29, 2017
Accounting Policies [Abstract]
Schedule Of Changes In Product Warranty Liability	Changes in the Company’s product warranty liability during the fiscal years ended 2017 and 2016 are as follows: Fiscal Years 2017 2016 (In millions) Beginning balance $ 17.2 $ 18.5 Acquired warranties 0.5 (0.2 ) Accruals for warranties issued 20.4 18.3 Changes in estimates (0.8 ) 0.3 Warranty settlements (in cash or in kind) (19.0 ) (19.7 ) Ending Balance $ 18.3 $ 17.2

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 29, 2017
Earnings Per Share [Abstract]
Schedule Of Computation Of Earnings Per Share And Effect On Weighted-Average Number Of Shares	The following table shows the computation of basic and diluted earnings per share: Fiscal Years 2017 2016 2015 (In millions, except per share data) Numerator: Net income attributable to Trimble Inc. $ 121.1 $ 132.4 $ 121.1 Denominator: Weighted average number of common shares used in basic earnings per share 252.1 250.5 255.8 Effect of dilutive securities 4.6 3.4 2.7 Weighted average number of common shares and dilutive potential common shares used in diluted earnings per share 256.7 253.9 258.5 Basic earnings per share $ 0.48 $ 0.53 $ 0.47 Diluted earnings per share $ 0.47 $ 0.52 $ 0.47

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 29, 2017
Business Acquisition [Line Items]
Schedule of Business Combination, Separately Recognized Transactions	The following table summarizes the Company’s business combinations completed during fiscal 2017 , 2016 and 2015 : Fiscal Years 2017 2016 2015 (In millions) Fair value of total purchase consideration $ 331.2 $ 27.6 $ 176.2 Less fair value of net assets acquired: Net tangible assets acquired 29.7 (1.9 ) 8.0 Identified intangible assets 166.7 13.6 83.3 Deferred taxes (5.8 ) (1.3 ) (13.6 ) Goodwill $ 140.6 $ 17.2 $ 98.5
Schedule Of Total Intangible Assets	The following table presents details of the Company’s total intangible assets: At the End of Fiscal 2017 At the End of Fiscal 2016 (In millions) Weighted-Average Remaining Useful Lives (in years) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed product technology 6 $ 915.3 $ (729.9 ) $ 185.4 $ 794.8 $ (620.6 ) $ 174.2 Trade names and trademarks 5 58.7 (48.6 ) 10.1 50.9 (42.9 ) 8.0 Customer relationships 7 512.1 (351.3 ) 160.8 438.7 (294.1 ) 144.6 Distribution rights and other intellectual properties 6 69.2 (60.7 ) 8.5 64.3 (57.8 ) 6.5 $ 1,555.3 $ (1,190.5 ) $ 364.8 $ 1,348.7 $ (1,015.4 ) $ 333.3
Schedule Of Estimated Future Amortization Expense Of Intangible Assets	The estimated future amortization expense of intangible assets at the end of fiscal 2017 is as follows (in millions): 2018 $ 133.1 2019 91.6 2020 62.6 2021 40.7 2022 21.7 Thereafter 15.1 Total $ 364.8
Schedule Of Changes In Carrying Amount Of Goodwill	for fiscal 2017 are as follows: (In millions) Buildings and Infrastructure Geospatial Resources and Utilities Transportation Total At the end of fiscal 2016 $ 663.7 $ 405.1 $ 217.7 $ 791.1 $ 2,077.6 Additions due to acquisitions and current year acquisitions' purchase price adjustments 2.5 — 86.3 51.8 140.6 Purchase price adjustments - prior years' acquisitions (0.1 ) — — — (0.1 ) Foreign currency translation adjustments 40.7 17.1 10.5 7.6 75.9 Divestitures (1) — (6.9 ) — — (6.9 ) At the end of fiscal 2017 $ 706.8 $ 415.3 $ 314.5 $ 850.5 $ 2,287.1 (1) In the first quarter of 2017, the Company sold its ThingMagic business, which was part of the Geospatial segment.

Certain Balance Sheet Compone31

Certain Balance Sheet Components (Tables)	12 Months Ended
	Dec. 29, 2017
Balance Sheet Related Disclosures [Abstract]
Components Of Net Inventories	The following tables provide details of selected balance sheet items: At the End of Fiscal Year 2017 2016 (In millions) Inventories: Raw materials $ 85.4 $ 77.9 Work-in-process 12.4 6.8 Finished goods 174.0 134.1 Total inventories $ 271.8 $ 218.8
Components Of Property And Equipment	At the End of Fiscal Year 2017 2016 (In millions) Property and equipment, net: Machinery and equipment $ 130.6 $ 113.3 Software and licenses 124.4 119.4 Furniture and fixtures 29.3 26.3 Leasehold improvements 36.6 32.1 Construction in progress 32.9 10.8 Buildings 60.9 47.9 Land 10.0 8.3 424.7 358.1 Less: accumulated depreciation (250.7 ) (213.9 ) Total $ 174.0 $ 144.2
Components of Other Noncurrent Liabilities	At the End of Fiscal Year 2017 2016 (In millions) Other non-current liabilities: Deferred compensation $ 27.1 $ 22.6 Pension 19.6 13.1 Deferred rent 3.1 3.3 Unrecognized tax benefits 76.4 65.3 Other 35.8 9.5 Total $ 162.0 $ 113.8

Reporting Segment And Geograp32

Reporting Segment And Geographic Information (Tables)	12 Months Ended
	Dec. 29, 2017
Segment Reporting, Measurement Disclosures [Abstract]
Schedule Of Revenue, Operating Income And Identifiable Assets By Segment	The following tables present revenue, operating income, depreciation expense and identifiable assets for the four segments. Operating income is revenue less cost of sales and operating expenses, excluding unallocated corporate expenses, restructuring charges, amortization of purchased intangible assets, stock-based compensation, amortization of acquisition-related inventory step-up, acquisition and divestiture items, and executive transition costs. The identifiable assets that the CODM views by segment are accounts receivable, inventories and goodwill. Fiscal Years 2017 2016 2015 (In millions) Buildings and Infrastructure Revenue $ 834.9 $ 743.5 $ 688.6 Operating income 179.9 133.9 108.2 Depreciation expense 6.2 7.0 7.8 Geospatial Revenue $ 661.2 $ 634.7 $ 672.8 Operating income 130.9 120.8 135.3 Depreciation expense 5.4 6.5 6.4 Resources and Utilities Revenue $ 476.9 $ 395.7 $ 381.8 Operating income 136.3 118.4 109.9 Depreciation expense 3.2 2.0 1.9 Transportation Revenue $ 681.2 $ 588.3 $ 547.2 Operating income 120.6 102.9 106.5 Depreciation expense 5.2 5.5 5.2 Total Revenue $ 2,654.2 $ 2,362.2 $ 2,290.4 Operating income 567.7 476.0 459.9 Depreciation expense 20.0 21.0 21.3 At the End of Fiscal Year 2017 2016 (In millions) Buildings and Infrastructure Accounts receivable $ 118.5 $ 104.7 Inventories 62.1 51.3 Goodwill 706.8 663.7 Geospatial Accounts receivable $ 117.7 $ 108.3 Inventories 110.7 100.4 Goodwill 415.3 405.1 Resources and Utilities Accounts receivable $ 76.9 $ 65.5 Inventories 45.3 31.0 Goodwill 314.5 217.7 Transportation Accounts receivable $ 101.7 $ 76.3 Inventories 53.7 36.1 Goodwill 850.5 791.1 Total Accounts receivable $ 414.8 $ 354.8 Inventories 271.8 218.8 Goodwill 2,287.1 2,077.6
Reconciliation Of The Company's Consolidated Segment Operating Income To Consolidated Income Before Income Taxes	A reconciliation of the Company’s consolidated segment operating income to consolidated income before income taxes is as follows: Fiscal Years 2017 2016 2015 (In millions) Consolidated segment operating income $ 567.7 $ 476.0 $ 459.9 Unallocated corporate expense (1) (87.4 ) (70.5 ) (70.0 ) Restructuring charges (2) (10.5 ) (13.3 ) (12.8 ) Stock-based compensation (64.8 ) (52.6 ) (50.1 ) Amortization of purchased intangible assets (148.8 ) (150.8 ) (162.4 ) Amortization of acquisition-related inventory step-up (2.8 ) — — Acquisition and divestiture items (7.4 ) (6.8 ) (9.9 ) Executive transition costs — (1.0 ) — Litigation costs — — (0.3 ) Consolidated operating income 246.0 181.0 154.4 Non-operating income (expense), net 13.1 (4.3 ) (2.6 ) Consolidated income before taxes $ 259.1 $ 176.7 $ 151.8 (1) Unallocated corporate expense includes general corporate expense. (2) Restructuring charges primarily consist of severance and benefits, resulting from employee headcount reductions in connection with the Company's restructuring programs related to decisions to streamline processes and reduce the cost structure. As of the end of fiscal 2017 , the Company's restructuring liability was $1.4 million , which is expected to be settled in fiscal 2018. Restructuring liabilities are reported within Other current liabilities on the Consolidated Balance Sheets.
Schedule Of Revenue From Customers	The geographic distribution of Trimble’s revenue and long-lived assets is summarized in the tables below. Other non-US geographies include Canada, and countries in South and Central America, the Middle East, and Africa. Revenue is defined as revenue from external customers. Fiscal Years 2017 2016 2015 (In millions) Revenue (1): United States $ 1,285.7 $ 1,156.0 $ 1,142.1 Europe 677.1 574.9 557.2 Asia Pacific 378.3 352.6 321.1 Other non-US countries 313.1 278.7 270.0 Total consolidated revenue $ 2,654.2 $ 2,362.2 $ 2,290.4 (1) Revenue is attributed to countries based on the location of the customer.
Schedule Of Long-Lived Assets	Property and equipment, net by geographic area was as follows: At the End of Fiscal Year 2017 2016 (In millions) Property and equipment, net: United States $ 131.7 $ 120.4 Europe 33.1 15.3 Asia Pacific and other non-US countries 9.2 8.5 Total property and equipment, net $ 174.0 $ 144.2

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 29, 2017
Long-term Debt, Unclassified [Abstract]
Schedule Of Debt	Debt consisted of the following: At the End of Fiscal Year 2017 2016 (In millions) Notes: Principal amount $ 400.0 $ 400.0 Unamortized discount on Notes (2.2 ) (2.5 ) Debt issuance costs (2.1 ) (2.4 ) Credit Facilities: 2014 Credit facility 389.0 94.0 Uncommitted facilities 128.0 130.0 Promissory notes and other debt 1.2 0.8 Total debt 913.9 619.9 Less: Short-term debt 128.4 130.3 Long-term debt $ 785.5 $ 489.6
Schedule of Maturities of Long-term Debt	At the end of fiscal 2017 , the Company's debt maturities based on outstanding principal were as follows (in millions): Year Payable 2018 $ 128.4 2019 389.4 2020 0.3 2021 0.1 2022 — Thereafter 400.0 Total $ 918.2

Commitments And Contingencies (

Commitments And Contingencies (Tables)	12 Months Ended
	Dec. 29, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Estimated Future Minimum Operating Lease Commitments	The estimated future minimum payments required under the Company’s operating lease commitments at the end of fiscal 2017 were as follows (in millions): 2018 $ 35.5 2019 30.1 2020 22.5 2021 19.7 2022 15.1 Thereafter 29.5 Total $ 152.4

Cash Equivalents and Investme35

Cash Equivalents and Investments (Tables)	12 Months Ended
	Dec. 29, 2017
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Investments	The following table summarizes the Company’s available-for-sale securities: At the End of Fiscal Year 2017 2016 (In millions) Available-for-sale securities: U.S. Treasury securities $ 9.6 $ 11.7 Municipal debt securities — 10.0 Corporate debt securities 96.0 31.7 Time deposit — 2.4 Commercial paper 100.1 77.5 Total available-for-sale securities $ 205.7 $ 133.3 Reported as: Cash and cash equivalents $ 26.8 $ 22.2 Short-term investments 178.9 111.1 Total $ 205.7 $ 133.3
Investments Classified by Contractual Maturity Date	The following table presents the contractual maturities of the Company's available-for-sale investments: At the End of Fiscal Year 2017 2016 (In millions) Due in less than 1 year $ 191.1 $ 106.9 Due in 1 to 5 years 14.6 16.4 Due in 5-10 years — 2.0 Due after 10 years — 8.0 Total $ 205.7 $ 133.3 The Company’s available-for-sale securities are liquid and may be sold to fund future operating needs. As a result, the Company recorded all of its available-for-sale securities, not classified as Cash equivalents, in Short-term investments regardless of the contractual maturity date of the securities.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 29, 2017
Fair Value Disclosures [Abstract]
Assets And Liabilities Measured At Fair Value On A Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are categorized in the tables below based upon the lowest level of significant input to the valuations. At the End of Fiscal Year 2017 2016 (In millions) Level I Level II Level III Total Level I Level II Level III Total Assets Available-for-sale securities: U.S. Treasury securities (1) $ — $ 9.6 $ — $ 9.6 $ — $ 11.7 $ — $ 11.7 Municipal debt securities (1) — — — — — 10.0 — 10.0 Corporate debt securities (1) — 96.0 — 96.0 — 31.7 — 31.7 Time deposit (1) — — 2.4 2.4 Commercial paper (1) — 100.1 — 100.1 — 77.5 — 77.5 Total available-for-sale securities — 205.7 — 205.7 — 133.3 — 133.3 Deferred compensation plan assets (2) 27.1 — — 27.1 22.6 — — 22.6 Derivative assets (3) — 0.5 — 0.5 — 0.2 — 0.2 Contingent consideration asset (4) — — — — — — 7.0 7.0 Total assets measured at fair value $ 27.1 $ 206.2 $ — $ 233.3 $ 22.6 $ 133.5 $ 7.0 $ 163.1 Liabilities Deferred compensation plan liabilities (2) $ 27.1 $ — $ — $ 27.1 $ 22.6 $ — $ — $ 22.6 Derivative liabilities (3) — 0.1 — 0.1 — 0.1 — 0.1 Contingent consideration liabilities (5) — — 14.2 14.2 — — 4.5 4.5 Total liabilities measured at fair value $ 27.1 $ 0.1 $ 14.2 $ 41.4 $ 22.6 $ 0.1 $ 4.5 $ 27.2 (1) The Company’s available-for sale securities are valued using readily available pricing sources for comparable instruments, or model-driven valuations using significant inputs derived from or corroborated by observable market data, including yield curves and credit ratings. (2) The Company maintains a self-directed, non-qualified deferred compensation plan for certain executives and other highly compensated employees. The plan assets and liabilities are invested in actively traded mutual funds and individual stocks valued using observable quoted prices in active markets. Deferred compensation plan assets and liabilities are included in Other non-current assets and Other non-current liabilities, respectively, on the Company's Consolidated Balance Sheets. (3) Derivative assets and liabilities primarily represent forward currency exchange contracts. The Company typically enters into these contracts to minimize the short-term impact of foreign currency exchange rates on certain trade and inter-company receivables and payables. Derivative assets and liabilities are included in Other current assets and Other current liabilities on the Company's Consolidated Balance Sheets. (4) Contingent consideration asset represents an arrangement for buyers to pay the Company for a business that it has divested. The fair value is determined based on the Company's expectations of future receipts. Due to the Company's assessment of the recoverability of the contingent consideration asset, the Company recognized an impairment loss of $7.0 million , which is included in Other income, net for fiscal 2017. (5) Contingent consideration liabilities represent arrangements to pay the former owners of certain companies that Trimble acquired. The undiscounted maximum payment under the arrangements is $50.3 million at the end of fiscal 2017 . The fair values are estimated using scenario-based methods or option pricing methods based upon estimated future revenues, gross margins or other milestones. Contingent consideration liabilities are included in Other current liabilities and Other non-current liabilities on the Company's Consolidated Balance Sheets.
Additional Fair Value Information Relating To The Company's Financial Instruments Outstanding	The following table provides additional fair value information relating to the Company’s financial instruments outstanding: At the End of Fiscal Year 2017 2016 (In millions) Carrying Amount Fair Value Carrying Amount Fair Value Liabilities: Notes $ 400.0 $ 430.4 $ 400.0 $ 410.6 2014 Credit facility 389.0 389.0 94.0 94.0 Uncommitted facilities 128.0 128.0 130.0 130.0 Promissory notes and other debt 1.2 1.2 0.8 0.8

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 29, 2017
Income Tax Disclosure [Abstract]
Schedule Of Income Before Taxes, United States And Foreign	Income before taxes and the provision for taxes consisted of the following: Fiscal Years 2017 2016 2015 (In millions) Income before taxes: United States $ 38.0 $ 68.4 $ 55.6 Foreign 221.1 108.3 96.2 Total $ 259.1 $ 176.7 $ 151.8
Schedule Of Provision For Taxes	Provision for taxes: US Federal: Current $ 98.6 $ 34.0 $ 47.5 Deferred 0.8 (14.3 ) (23.0 ) 99.4 19.7 24.5 US State: Current 4.5 3.5 5.7 Deferred (1.1 ) 0.6 (2.8 ) 3.4 4.1 2.9 Foreign: Current 42.7 28.8 25.4 Deferred (7.6 ) (8.1 ) (21.7 ) 35.1 20.7 3.7 Income tax provision $ 137.9 $ 44.5 $ 31.1 Effective tax rate 53 % 25 % 20 %
Schedule Of Difference Between The Tax Provision At The Statutory Federal Income Tax Rate And The Tax Provision As A Percentage Of Income Before Taxes (Effective Tax Rate)	The difference between the tax provision at the statutory federal income tax rate and the tax provision as a percentage of income before taxes ("effective tax rate") was as follows: Fiscal Years 2017 2016 2015 Statutory federal income tax rate 35 % 35 % 35 % Increase (reduction) in tax rate resulting from: Foreign income taxed at lower rates (15 )% (10 )% (11 )% US State income taxes 1 % 2 % 1 % US Federal research and development credits (3 )% (3 )% (3 )% Stock-based compensation 2 % 3 % 1 % Excess tax benefit related to stock-based compensation (3 )% — % — % Effect of U.S. tax law change 33 % — % — % Foreign audit reserve release — % — % (2 )% Divestiture — % (5 )% — % Valuation allowance release - foreign — % — % (3 )% Other 3 % 3 % 2 % Effective tax rate 53 % 25 % 20 %
Schedule Of Deferred Tax Assets And Liabilities	The significant components of the Company’s deferred tax assets and liabilities are as follows: At the End of Fiscal Year 2017 2016 (In millions) Deferred tax liabilities: Purchased intangibles $ 69.8 $ 91.9 Depreciation and amortization 13.1 11.7 US residual tax on foreign earnings — 11.3 Total deferred tax liabilities 82.9 114.9 Deferred tax assets: Inventory valuation differences 4.6 12.9 Expenses not currently deductible 18.1 27.7 US federal tax credit carryforwards 0.2 0.3 Deferred revenue 5.8 6.9 US state tax credit carryforwards 21.7 15.1 Accrued warranty 2.0 3.1 US federal net operating loss carryforwards 6.4 3.8 Foreign net operating loss carryforwards 20.2 31.2 Stock-based compensation 21.5 31.9 Other (4.4 ) 4.1 Total deferred tax assets 96.1 137.0 Valuation allowance (25.2 ) (30.6 ) Total deferred tax assets 70.9 106.4 Total net deferred tax liabilities $ (12.0 ) $ (8.5 ) Reported as: Non-current deferred income tax assets 28.4 30.3 Non-current deferred income tax liabilities (40.4 ) (38.8 ) Net deferred tax liabilities $ (12.0 ) $ (8.5 )
Schedule Of Reconciliation Of Unrecognized Tax Benefit	The total amount of the unrecognized tax benefits at the end of fiscal 2017 was $82.4 million . A reconciliation of gross unrecognized tax benefit is as follows: Fiscal Years 2017 2016 2015 (In millions) Beginning gross balance $ 72.9 $ 59.0 $ 51.4 Increase (decrease) related to prior years' tax positions (0.6 ) 7.5 6.0 Increase related to current year tax positions 12.1 9.9 6.2 Lapse of statute of limitations (1.6 ) (1.4 ) (1.5 ) Settlement with taxing authorities (0.4 ) (2.1 ) (3.1 ) Ending gross balance $ 82.4 $ 72.9 $ 59.0

Comprehensive Income (Tables)

Comprehensive Income (Tables)	12 Months Ended
	Dec. 29, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Components Of Accumulated Other Comprehensive Income, Net Of Related Tax	The components of accumulated other comprehensive loss, net of related tax were as follows: At the End of Fiscal Year 2017 2016 (In millions) Accumulated foreign currency translation adjustments $ (127.6 ) $ (216.8 ) Net unrealized loss on short-term investments (0.2 ) — Net unrealized actuarial losses (3.4 ) (3.1 ) Total accumulated other comprehensive loss $ (131.2 ) $ (219.9 )

Employee Stock Benefit Plans (T

Employee Stock Benefit Plans (Tables)	12 Months Ended
	Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule Of Stock-Based Compensation Expense, Net Of Tax, Related To Employee Stock-Based Compensation (For All Plans)	The following table summarizes the components of stock-based compensation expense recognized in the Company’s Consolidated Statements of Income for the periods indicated: Fiscal Years 2017 2016 2015 (In millions) Restricted stock units $ 53.3 $ 35.9 $ 27.9 Stock options 5.7 10.9 16.6 ESPP 5.8 5.8 5.6 Total stock-based compensation expense $ 64.8 $ 52.6 $ 50.1
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	Restricted Stock Units Outstanding Restricted Weighted Average (In millions, except for per share data) Outstanding at the beginning of year 4.7 $ 26.40 Granted (1) 2.0 $ 40.19 Shares released, net (1.4 ) $ 28.06 Cancelled and Forfeited (0.2 ) $ 30.58 Outstanding at the end of year 5.1 $ 31.71 (1) During fiscal year 2017, the Company granted approximately 1.3 million time-based RSUs, 0.5 million performance-based RSUs and 0.2 million market-based RSUs. As of fiscal year end 2017, the Company has 1.7 million market-based and performance-based RSUs outstanding and none had vested as of fiscal 2017 year end.
Schedule Of Restricted Stock Unit Activity	The following table summarizes information about restricted stock units outstanding as of fiscal 2017: Number Weighted- (in years) Aggregate Expected to vest (1) 4.7 1.40 $ 192.9 (1) For those shares expected to vest upon the achievement of specified performance goals, the amount represents of estimated number of shares that expect to vest based on the estimated achievement of such specified performance goals as of the end of fiscal 2017.
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The fair value of the share purchase rights granted under the Purchase Plan are valued using the Black-Scholes option pricing model with the following weighted-average assumptions: Fiscal Years 2017 2016 2015 Expected life of purchase 0.5 years 0.5 years 0.5 years Expected stock price volatility (1) 32.1 % 36.9 % 31.3 % Risk free interest rate 0.70 % 0.41 % 0.08 % Expected dividend yield — — —
Share-based Compensation, Stock Options, Activity [Table Text Block]	The following table summarizes information about stock options outstanding as of fiscal 2017 year end: Number Of Shares (in millions) Weighted- Average Exercise Price per Share Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Outstanding at the beginning of year 7.6 $ 24.60 Option exercised (3.2 ) 22.52 Cancelled and Forfeited — 25.97 Outstanding at the end of year 4.4 26.12 2.17 $ 63.8 Options exercisable 4.1 $ 26.07 2.04 $ 60.1
Market Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule Of Weighted-Average Assumptions Used In Stock Options Granted	The fair value of RSUs with market-based vesting conditions is measured on the grant date using a Monte Carlo simulation with the following weighted-average assumptions: Fiscal Years 2017 2016 2015 Expected life of Market-Based Restricted Stock Units 3.0 years 3.1 years 2.6 years Expected stock price volatility 31.46 % 33.8 % 30.9 % Risk free interest rate 1.46 % 0.9 % 0.9 % Expected dividend yield — — —

Statement Of Cash Flow Data (Ta

Statement Of Cash Flow Data (Tables)	12 Months Ended
	Dec. 29, 2017
Supplemental Cash Flow Elements [Abstract]
Schedule Of Supplemental Disclosure Of Cash Flow Information	Fiscal Years 2017 2016 2015 (In millions) Supplemental disclosure of cash flow information: Interest paid $ 28.4 $ 27.3 $ 26.5 Income taxes paid $ 46.6 $ 57.4 $ 54.0

Selected Quarterly Financial 41

Selected Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule Of Selected Quarterly Financial Data	First Quarter Second Quarter Third Quarter Fourth Quarter Fiscal Period 2017 2017 2017 2017 (in millions, except per share data) Revenue $ 613.9 $ 661.9 $ 670.0 $ 708.4 Gross margin 326.6 346.5 349.5 370.0 Net income (loss) attributable to Trimble Inc. 50.5 49.9 55.7 (35.0 ) Basic net income (loss) per share 0.20 0.20 0.22 (0.14 ) Diluted net income (loss) per share 0.20 0.19 0.22 (0.14 )	First Quarter Second Quarter Third Quarter Fourth Quarter Fiscal Period 2016 2016 2016 2016 (in millions, except per share data) Revenue $ 583.0 $ 609.6 $ 584.1 $ 585.5 Gross margin 300.6 315.6 309.0 312.8 Net income attributable to Trimble Inc. 19.8 35.7 39.2 37.7 Basic net income per share 0.08 0.14 0.16 0.15 Diluted net income per share 0.08 0.14 0.15 0.15

Accounting Policies (Narrative)

Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017segment	Dec. 29, 2017USD ($)segment	Dec. 30, 2016USD ($)segment	Jan. 01, 2016USD ($)	Oct. 01, 2016	Jan. 02, 2015USD ($)
Accounting Policies [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities		$ 0
Number of Reportable Segments | segment	4	4	4
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 2,366	$ 2,305.7	$ 2,220.6		$ 2,353.4
Allowance for Doubtful Accounts Receivable, Current		3.6	5
Additional paid-in-capital		1,461.1	1,348.3
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		0
Depreciation expense		34.6	37	36.7
Net Cash Provided by (Used in) Operating Activities		411.9	413.6	357
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		79.1	(162.3)	(204.9)
Advertising expense		37.2	37.2	32.3
Research and Development expense with third party funding earned		18.1	13	12.5
Unamortized Debt Issuance Expense		2.1	2.4
Revenue Recognition, Sales Returns, Reserve for Sales Returns		$ 4.2	3.6
Building [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		39 years
Leasehold Improvements [Member]
Accounting Policies [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		the life of the lease
Minimum [Member]
Accounting Policies [Line Items]
Maturity period of derivative financial instrument, minimum, in months		1 month
Estimated useful lives goodwill and purchased intangible assets, in years		4 years
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount					311.00%
Warranty periods for products sold		1 year
Minimum [Member] | Machinery And Equipment [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		4 years
Minimum [Member] | Furniture And Fixtures [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		5 years
Minimum [Member] | Computer Equipment And Software [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		2 years
Minimum [Member] | Internal-Use Of Software [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		2 years
Maximum [Member]
Accounting Policies [Line Items]
Investments, Weighted Average Maturity Term		6 months
Maturity period of derivative financial instrument, minimum, in months		2 months
Estimated useful lives goodwill and purchased intangible assets, in years		8 years
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount					903.00%
Warranty periods for products sold		2 years
Maximum [Member] | Machinery And Equipment [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		6 years
Maximum [Member] | Furniture And Fixtures [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		7 years
Maximum [Member] | Computer Equipment And Software [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		5 years
Maximum [Member] | Internal-Use Of Software [Member]
Accounting Policies [Line Items]
Useful life of asset, in years		5 years
Weighted Average [Member]
Accounting Policies [Line Items]
Estimated useful lives goodwill and purchased intangible assets, in years		6 years 1 month
Forward Contracts [Member]
Accounting Policies [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net		$ 0	0
Indemnification Agreement [Member]
Accounting Policies [Line Items]
Loss Contingency Accrual		0	0
Additional Paid-in Capital [Member]
Accounting Policies [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		1,461.1	1,348.3	1,238		$ 1,207
Accounting Standards Update 2016-09 [Member]
Accounting Policies [Line Items]
Net Cash Provided by (Used in) Operating Activities			$ 6.5	$ 2.1
income expense benefit [Member] | Accounting Standards Update 2016-09 [Member]
Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		8.9
Deferred Revenue [Member] | Accounting Standards Update 2014-09 [Member] | Minimum [Member]
Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		40
Deferred Revenue [Member] | Accounting Standards Update 2014-09 [Member] | Maximum [Member]
Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		55
Prepaid Expenses and Other Current Assets [Member] | Accounting Standards Update 2014-09 [Member] | Minimum [Member]
Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		30
Prepaid Expenses and Other Current Assets [Member] | Accounting Standards Update 2014-09 [Member] | Maximum [Member]
Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 40

Accounting Policies (Schedule O

Accounting Policies (Schedule Of Changes In Product Warranty Liability) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 17.2	$ 18.5
Acquired warranties	0.5	(0.2)
Accruals for warranties issued	20.4	18.3
Changes in estimates	(0.8)	0.3
Warranty settlements (in cash or in kind)	(19)	(19.7)
Ending Balance	$ 18.3	$ 17.2

Accounting Policies (Guarantees

Accounting Policies (Guarantees) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Maximum potential exposure indemnification accrual	$ 0	$ 0

Earnings Per Share (Schedule Of

Earnings Per Share (Schedule Of Computation Of Earnings Per Share And Effect On Weighted-Average Number Of Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Net income attributable to Trimble Inc.	$ (35)	$ 55.7	$ 49.9	$ 50.5	$ 37.7	$ 39.2	$ 35.7	$ 19.8	$ 121.1	$ 132.4	$ 121.1
Weighted average number of common shares used in basic earnings per share									252.1	250.5	255.8
Effect of dilutive securities									4.6	3.4	2.7
Weighted average number of common shares and dilutive potential common shares used in diluted earnings per share									256.7	253.9	258.5
Basic earnings per share	$ (0.14)	$ 0.22	$ 0.20	$ 0.20	$ 0.15	$ 0.16	$ 0.14	$ 0.08	$ 0.48	$ 0.53	$ 0.47
Diluted earnings per share	$ (0.14)	$ 0.22	$ 0.19	$ 0.20	$ 0.15	$ 0.15	$ 0.14	$ 0.08	$ 0.47	$ 0.52	$ 0.47

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Earnings Per Share [Abstract]
Shares excluded from calculation of diluted earnings per share	0.5	4.3	6.1

Business Combinations (Narrativ

Business Combinations (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017USD ($)segment	Dec. 29, 2017USD ($)segmentacquisition	Dec. 30, 2016USD ($)segmentacquisition	Jan. 01, 2016USD ($)acquisition
Business Acquisition [Line Items]
Number of Businesses Acquired | acquisition		10	4	13
Total Cash Consideration		$ 331.2	$ 27.6	$ 176.2
Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual Percentage Of Total Revenue		2.00%	1.00%	1.00%
Business Combination Valuation Remeasurement Window		1 year
Acquisition-related costs		$ 7.4	$ 6.8	$ 9.9
Number of Reportable Segments | segment	4	4	4
Goodwill, Impairment Loss	$ 0
Minimum [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 2	$ 0.3	2
Maximum [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 134	$ 14	$ 30

Business Combinations (Schedule

Business Combinations (Schedule Of Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net ) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	$ 2,287.1	$ 2,077.6
Acquired Companies Group [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Fair value of total purchase consideration	331.2	27.6	$ 176.2
Net tangible assets acquired	29.7	(1.9)	8
Identified intangible assets	166.7	13.6	83.3
Deferred taxes	(5.8)	(1.3)	(13.6)
Goodwill	$ 140.6	$ 17.2	$ 98.5

Business Combinations (Schedu49

Business Combinations (Schedule Of Total Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,555.3	$ 1,348.7
Accumulated Amortization	(1,190.5)	(1,015.4)
Total	364.8	333.3
Developed Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	915.3	794.8
Accumulated Amortization	(729.9)	(620.6)
Total	$ 185.4	174.2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
Trade Names And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 58.7	50.9
Accumulated Amortization	(48.6)	(42.9)
Total	$ 10.1	8
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 512.1	438.7
Accumulated Amortization	(351.3)	(294.1)
Total	$ 160.8	144.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Distribution Rights And Other Intellectual Properties [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 69.2	64.3
Accumulated Amortization	(60.7)	(57.8)
Total	$ 8.5	$ 6.5
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years

Business Combinations (Schedu50

Business Combinations (Schedule Of Estimated Future Amortization Expense Of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Business Combinations [Abstract]
2,018	$ 133.1
2,019	91.6
2,020	62.6
2,021	40.7
2,022	21.7
Thereafter	15.1
Total	$ 364.8	$ 333.3

Business Combinations (Schedu51

Business Combinations (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 29, 2017USD ($)
Goodwill [Line Items]
Beginning Balance	$ 2,077.6
Additions due to acquisitions and current year acquisitions' purchase price adjustments	140.6
Purchase price adjustments - prior years' acquisitions	(0.1)
Foreign currency translation adjustments	75.9
Divestitures (1)	(6.9)	[1]
Ending Balance	2,287.1
Building and Infrastructure [Member]
Goodwill [Line Items]
Beginning Balance	663.7
Additions due to acquisitions and current year acquisitions' purchase price adjustments	2.5
Purchase price adjustments - prior years' acquisitions	(0.1)
Foreign currency translation adjustments	40.7
Divestitures (1)	0	[1]
Ending Balance	706.8
Geospatial [Member]
Goodwill [Line Items]
Beginning Balance	405.1
Additions due to acquisitions and current year acquisitions' purchase price adjustments	0
Purchase price adjustments - prior years' acquisitions	0
Foreign currency translation adjustments	17.1
Divestitures (1)	(6.9)	[1]
Ending Balance	415.3
Resources and Utilities [Member]
Goodwill [Line Items]
Beginning Balance	217.7
Additions due to acquisitions and current year acquisitions' purchase price adjustments	86.3
Purchase price adjustments - prior years' acquisitions	0
Foreign currency translation adjustments	10.5
Divestitures (1)	0	[1]
Ending Balance	314.5
Transportation [Member]
Goodwill [Line Items]
Beginning Balance	791.1
Additions due to acquisitions and current year acquisitions' purchase price adjustments	51.8
Purchase price adjustments - prior years' acquisitions	0
Foreign currency translation adjustments	7.6
Divestitures (1)	0	[1]
Ending Balance	$ 850.5
[1]	In the first quarter of 2017, the Company sold its ThingMagic business, which was part of the Geospatial segment

Certain Balance Sheet Compone52

Certain Balance Sheet Components (Components Of Net Inventories) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 85.4	$ 77.9
Work-in-process	12.4	6.8
Finished goods	174	134.1
Total inventories	271.8	218.8
Deferred Costs, Current	$ 16.6	$ 14.4

Certain Balance Sheet Compone53

Certain Balance Sheet Components (Components Of Property And Equipment) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 424.7	$ 358.1
Less: accumulated depreciation	(250.7)	(213.9)
Total	174	144.2
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	130.6	113.3
Software License Arrangement [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	124.4	119.4
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	29.3	26.3
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	36.6	32.1
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	32.9	10.8
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	60.9	47.9
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 10	$ 8.3

Certain Balance Sheet Compone54

Certain Balance Sheet Components (Components Of Other Non-Current Liabilities) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Deferred compensation	$ 27.1	$ 22.6
Pension	19.6	13.1
Deferred rent	3.1	3.3
Unrecognized tax benefits	76.4	65.3
Other	35.8	9.5
Total	$ 162	$ 113.8

Reporting Segment And Geograp55

Reporting Segment And Geographic Information Reporting Segment And Geographic Information - Narratives (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 29, 2017USD ($)	Sep. 29, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)segment	Dec. 30, 2016USD ($)	Sep. 30, 2016USD ($)	Jul. 01, 2016USD ($)	Apr. 01, 2016USD ($)	Dec. 29, 2017USD ($)segment		Dec. 30, 2016USD ($)segment		Jan. 01, 2016USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 708.4	$ 670	$ 661.9	$ 613.9	$ 585.5	$ 584.1	$ 609.6	$ 583	$ 2,654.2	[1]	$ 2,362.2	[1]	$ 2,290.4	[1]
Number of Reportable Segments | segment				4					4		4
Restructuring Liability, Current	$ 1.4								$ 1.4
Ten Percent Customer member [Member]
Segment Reporting Information [Line Items]
Revenues									$ 0		$ 0		$ 0
Ten Percent Customer member [Member] | Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage									10.00%		10.00%		10.00%
Ten Percent Accounts Receivable member [Member]
Segment Reporting Information [Line Items]
Revenues									$ 0		$ 0
Ten Percent Accounts Receivable member [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage									10.00%		10.00%
[1]	Revenue is attributed to countries based on the location of the customer.

Reporting Segment And Geograp56

Reporting Segment And Geographic Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 29, 2017		Dec. 30, 2016		Jan. 01, 2016
Segment Reporting Information [Line Items]
Revenues	$ 708.4	$ 670	$ 661.9	$ 613.9	$ 585.5	$ 584.1	$ 609.6	$ 583	$ 2,654.2	[1]	$ 2,362.2	[1]	$ 2,290.4	[1]
Operating Income (Loss)									246		181		154.4
Depreciation									34.6		37		36.7
Accounts receivable	414.8				354.8				414.8		354.8
Inventories	271.8				218.8				271.8		218.8
Goodwill	2,287.1				2,077.6				2,287.1		2,077.6
Building and Infrastructure [Member]
Segment Reporting Information [Line Items]
Revenues									834.9		743.5		688.6
Accounts receivable	118.5				104.7				118.5		104.7
Inventories	62.1				51.3				62.1		51.3
Goodwill	706.8				663.7				706.8		663.7
Geospatial [Member]
Segment Reporting Information [Line Items]
Revenues									661.2		634.7		672.8
Accounts receivable	117.7				108.3				117.7		108.3
Inventories	110.7				100.4				110.7		100.4
Goodwill	415.3				405.1				415.3		405.1
Resources and Utilities [Member]
Segment Reporting Information [Line Items]
Revenues									476.9		395.7		381.8
Accounts receivable	76.9				65.5				76.9		65.5
Inventories	45.3				31				45.3		31
Goodwill	314.5				217.7				314.5		217.7
Transportation [Member]
Segment Reporting Information [Line Items]
Revenues									681.2		588.3		547.2
Accounts receivable	101.7				76.3				101.7		76.3
Inventories	53.7				36.1				53.7		36.1
Goodwill	$ 850.5				$ 791.1				850.5		791.1
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									567.7		476		459.9
Operating Segments [Member] | Building and Infrastructure [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									179.9		133.9		108.2
Operating Segments [Member] | Geospatial [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									130.9		120.8		135.3
Operating Segments [Member] | Resources and Utilities [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									136.3		118.4		109.9
Operating Segments [Member] | Transportation [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									120.6		102.9		106.5
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Depreciation									20		21		21.3
Segment Reconciling Items [Member] | Building and Infrastructure [Member]
Segment Reporting Information [Line Items]
Depreciation									6.2		7		7.8
Segment Reconciling Items [Member] | Geospatial [Member]
Segment Reporting Information [Line Items]
Depreciation									5.4		6.5		6.4
Segment Reconciling Items [Member] | Resources and Utilities [Member]
Segment Reporting Information [Line Items]
Depreciation									3.2		2		1.9
Segment Reconciling Items [Member] | Transportation [Member]
Segment Reporting Information [Line Items]
Depreciation									$ 5.2		$ 5.5		$ 5.2
[1]	Revenue is attributed to countries based on the location of the customer.

Reporting Segment And Geograp57

Reporting Segment And Geographic Information (Reconciliation Of The Company's Consolidated Segment Operating Income To Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unallocated Corporate Expenses		$ (1,146.6)	$ (1,057)	$ (1,047.8)
Restructuring Charges	[1]	(10.5)	(13.3)	(12.8)
Stock-based Compensation		(64.8)	(52.6)	(50.1)
Amortization of purchased intangible assets		(148.8)	(150.8)	(162.4)
Amortization of acquisition-related inventory set-up		(2.8)	0	0
Acquisition and divestiture items		(7.4)	(6.8)	(9.9)
Executive Transition Costs		0	(1)	0
Litigation Costs		0	0	(0.3)
Consolidated Operating income		246	181	154.4
Non-operating income (expense), net		13.1	(4.3)	(2.6)
Consolidated Income Before Taxes		259.1	176.7	151.8
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating income		567.7	476	459.9
Corporate, Non-Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unallocated Corporate Expenses	[2]	$ (87.4)	$ (70.5)	$ (70)
[1]	Restructuring charges primarily consist of severance and benefits, resulting from employee headcount reductions in connection with the Company's restructuring programs related to decisions to streamline processes and reduce the cost structure. As of the end of fiscal 2017, the Company's restructuring liability was $1.4 million, which is expected to be settled in fiscal 2018. Restructuring liabilities are reported within Other current liabilities on the Consolidated Balance Sheets.
[2]	Unallocated corporate expense includes general corporate expense.

Reporting Segment And Geograp58

Reporting Segment And Geographic Information (Schedule Of Revenue From Customers) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 29, 2017		Dec. 30, 2016		Jan. 01, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 708.4	$ 670	$ 661.9	$ 613.9	$ 585.5	$ 584.1	$ 609.6	$ 583	$ 2,654.2	[1]	$ 2,362.2	[1]	$ 2,290.4	[1]
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									1,285.7		1,156		1,142.1
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									677.1		574.9		557.2
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									378.3		352.6		321.1
Other Non-US Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									313.1		278.7		270
Ten Percent Customer member [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										$ 0		$ 0		$ 0
Ten Percent Customer member [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage										10.00%		10.00%		10.00%
Ten Percent Accounts Receivable member [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										$ 0		$ 0
Ten Percent Accounts Receivable member [Member] | Accounts Receivable [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage										10.00%		10.00%
[1]	Revenue is attributed to countries based on the location of the customer.

Reporting Segment And Geograp59

Reporting Segment And Geographic Information (Schedule Of Long-Lived Assets) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	$ 174	$ 144.2
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	131.7	120.4
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	33.1	15.3
Asia Pacific And Other Non-US Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	$ 9.2	$ 8.5

Long-Term Debt (Schedule Of Deb

Long-Term Debt (Schedule Of Debt) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Debt Instrument [Line Items]
Debt issuance costs	$ (2.1)	$ (2.4)
Long-term Debt	913.9	619.9
Less: Short-term debt	128.4	130.3
Long-term Debt, Excluding Current Maturities	785.5	489.6
Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount	400	400
Unamortized discount on Notes	(2.2)	(2.5)
Revolving Credit Facility [Member] | 2014 Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	389	94
Uncommitted Facilities [Member]
Debt Instrument [Line Items]
Long-term Debt	128	130
Promissory Notes And Other [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 1.2	$ 0.8

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details) $ in Millions	Feb. 02, 2018USD ($)	Nov. 24, 2014USD ($)	Oct. 30, 2014	Dec. 29, 2017USD ($)loan	Dec. 30, 2016USD ($)	Jan. 01, 2016USD ($)	Jan. 02, 2015USD ($)
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				$ 786	$ 355	$ 555
Long-term Debt				913.9	619.9
Repayments of Debt				$ 495.4	465.3	$ 555.2
Interest Maturity Period, Variable Rate				1 month
Long-term Debt, Excluding Current Maturities				$ 785.5	489.6
Debt Instrument, Redemption, Prior to Sept 1, 2024 [Member] | US Treasury Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate				0.40%
Promissory Notes And Other [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 1.2	0.8
Promissory Notes And Other [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities				0.8	0.5
Uncommitted Facilities [Member]
Debt Instrument [Line Items]
Long-term Debt				128	130
Uncommitted Facilities [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, Current Borrowing Capacity				$ 75
Credit facility interest margin on stated base rate				1.00%
Number Of Revolving Loan Facilities | loan				2
Short-term Debt				$ 128	$ 130
Short-term Debt, Weighted Average Interest Rate, at Point in Time				2.24%	1.65%
Senior Notes 4.75% December 2024 [Member] | Debt Instrument, Redemption, Prior to Sept 1, 2024 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%
Senior Notes 4.75% December 2024 [Member] | Debt Instrument, Redemption, After Sept 1, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%
Senior Notes 4.75% December 2024 [Member] | Change of Control Period [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				101.00%
Senior Notes 4.75% December 2024 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Notes Shelf Registration date			Oct. 30, 2014
Debt Instrument, Issuance Date		Nov. 24, 2014
Debt Instrument, Face Amount		$ 400
Proceeds from Issuance of Debt							$ 396.9
Discount on Notes Offering Price, Percentage							0.795%
Debt Issuance Cost							$ 3
Underwriting discount							2.6
Debt Instrument, Maturity Date				Dec. 1, 2024
Debt Instrument, Interest Rate, Stated Percentage				4.75%
2012 Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility term period, years		5 years
Revolving Credit Facility, Current Borrowing Capacity		$ 700
2012 Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Credit facility term period, years		5 years
Revolving Credit Facility, Current Borrowing Capacity		$ 700
Repayments of Debt							638.8
2014 Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date				Nov. 24, 2014
Credit facility term period, years		5 years
Recognition of Debt Issuance Costs							1.6
Unsecured revolving credit facility, expiration date				Nov. 24, 2019
Covenant Ratio - Minimum Interest Coverage				3.50
Covenant Ratio - Maximum Leverage				3
Covenant Ratio Increase upon acquisition				0.50
Debt Instrument, Covenant Compliance				The Company was in compliance with these covenants at the end of fiscal 2017.
2014 Credit Facility [Member] | Reserve Adjusted Fixed Per Annum Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate				1.00%
2014 Credit Facility [Member] | Reserve Adjusted Fixed Per Annum Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate				1.75%
2014 Credit Facility [Member] | Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate				0.50%
2014 Credit Facility [Member] | Reserve Adjusted One Month LIBOR [Member]
Debt Instrument [Line Items]
Credit Facility Incremental Fixed Margin Rate				1.00%
2014 Credit Facility [Member] | Reserve Adjusted One Month LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate				0.00%
2014 Credit Facility [Member] | Reserve Adjusted One Month LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate				0.75%
2014 Credit Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.10%
2014 Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.30%
2014 Credit Facility [Member] | Term Loan [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unsecured Revolving Credit Facility Additional Borrowing Capacity				$ 500
2014 Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 389	$ 94
Long-term Debt, Weighted Average Interest Rate, at Point in Time				2.55%	1.80%
2014 Credit Facility [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, Current Borrowing Capacity				$ 1,000
Proceeds from Lines of Credit							307
Term Loan [Member] | Nonoperating Income (Expense) [Member] | 2012 Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Write off of unamortized debt issuance costs							$ 2.7
The Bank of Nova Scotia [Member] | Subsequent Event [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, Current Borrowing Capacity	$ 300
Unsecured Revolving Credit Facility Additional Borrowing Capacity	300
Long-term Debt	$ 300
The Bank of Nova Scotia [Member] | Subsequent Event [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] | Reserve Adjusted Fixed Per Annum Rate [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate	1.125%
The Bank of Nova Scotia [Member] | Subsequent Event [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] | Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate	0.50%
The Bank of Nova Scotia [Member] | Subsequent Event [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] | Reserve Adjusted One Month LIBOR [Member]
Debt Instrument [Line Items]
Credit facility interest margin on stated base rate	0.125%
Interest Maturity Period, Variable Rate	1 month

Long-Term Debt Long-Term Debt (

Long-Term Debt Long-Term Debt (Schedule of Debt Maturities) (Details) $ in Millions	Dec. 29, 2017USD ($)
Debt Disclosure [Abstract]
2,018	$ 128.4
2,019	389.4
2,020	0.3
2,021	0.1
2,022	0
Thereafter	400
Total	$ 918.2

Commitments And Contingencies63

Commitments And Contingencies (Schedule Of Estimated Future Minimum Payments Operating Leases Commitments) (Details) $ in Millions	Dec. 29, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 35.5
2,019	30.1
2,020	22.5
2,021	19.7
2,022	15.1
Thereafter	29.5
Total	$ 152.4

Commitments And Contingencies64

Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Commitments and Contingencies Disclosure [Abstract]
Net rent expense under operating leases		$ 35.5	$ 34.4	$ 34
Unconditional purchase obligations		198.1
Business Combination, Contingent Consideration, Liability	[1]	14.2	$ 4.5
Business Combination, Contingent Consideration, Liability, Current		0.9
Business Combination, Contingent Consideration, Liability, Noncurrent		$ 13.3
[1]	Contingent consideration liabilities represent arrangements to pay the former owners of certain companies that Trimble acquired. The undiscounted maximum payment under the arrangements is $50.3 million at the end of fiscal 2017.

Commitments And Contingencies C

Commitments And Contingencies Commitments and Contingencies - Litigation (Details) - Recreational Data Services Plaintiff [Member] - USD ($) $ in Millions	Mar. 18, 2015	Sep. 26, 2014
Customer Contracts [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded to Other Party		$ 51.3
Positive Outcome of Litigation [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount (Deprecated 2017-01-31)	$ 0.6

Cash and Cash Equivalents, Avai

Cash and Cash Equivalents, Available for Sale Investments (Details) - USD ($) $ in Millions		Dec. 29, 2017	Dec. 30, 2016
Cash and Cash Equivalents [Line Items]
Available-for-sale Securities, Debt Securities		$ 205.7	$ 133.3
Cash and cash equivalents		26.8	22.2
Short-term investments		178.9	111.1
Total		205.7	133.3
US Treasury Securities [Member]
Cash and Cash Equivalents [Line Items]
Available-for-sale Securities, Debt Securities	[1]	9.6	11.7
Municipal Bonds [Member]
Cash and Cash Equivalents [Line Items]
Available-for-sale Securities, Debt Securities	[1]	0	10
Corporate Debt Securities [Member]
Cash and Cash Equivalents [Line Items]
Available-for-sale Securities, Debt Securities	[1]	96	31.7
Bank Time Deposits [Member]
Cash and Cash Equivalents [Line Items]
Available-for-sale Securities, Debt Securities	[1]	0	2.4
Commercial Paper [Member]
Cash and Cash Equivalents [Line Items]
Available-for-sale Securities, Debt Securities	[1]	$ 100.1	$ 77.5
[1]	The Company’s available-for sale securities are valued using readily available pricing sources for comparable instruments, or model-driven valuations using significant inputs derived from or corroborated by observable market data, including yield curves and credit ratings.

Cash Equivalents and Investme67

Cash Equivalents and Investments - Contractual Maturities (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Cash and Cash Equivalents [Abstract]
Due in less than 1 year	$ 191.1	$ 106.9
Due in 1 to 5 years	14.6	16.4
Due in 5-10 years	0	2
Due after 10 years	0	8
Total	$ 205.7	$ 133.3

Fair Value Measurements (Assets

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 29, 2017	Dec. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities		$ 205.7	$ 133.3
Business Combination, Contingent Consideration, Asset	[1]	0	7
Assets, Fair Value Disclosure, Recurring		233.3	163.1
Business Combination, Contingent Consideration, Liability	[2]	14.2	4.5
Liabilities, Fair Value Disclosure, Recurring		41.4	27.2
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		27.1	22.6
Liabilities, Fair Value Disclosure, Recurring		27.1	22.6
Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities		205.7	133.3
Assets, Fair Value Disclosure, Recurring		206.2	133.5
Liabilities, Fair Value Disclosure, Recurring		0.1	0.1
Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Asset	[1]		7
Assets, Fair Value Disclosure, Recurring			7
Business Combination, Contingent Consideration, Liability	[2]	14.2	4.5
Liabilities, Fair Value Disclosure, Recurring		14.2	4.5
Deferred Compensation Plan Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets	[3]	27.1	22.6
Deferred Compensation Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets	[3]	27.1	22.6
Derivative Financial Instruments, Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	[4]	0.5	0.2
Derivative Financial Instruments, Assets [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	[4]	0.5	0.2
Deferred Compensation Plan Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	[3]	27.1	22.6
Deferred Compensation Plan Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	[3]	27.1	22.6
Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	[4]	0.1	0.1
Derivative Liabilities [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	[4]	0.1	0.1
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	9.6	11.7
US Treasury Securities [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	9.6	11.7
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	0	10
Municipal Bonds [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	0	10
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	96	31.7
Corporate Debt Securities [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	96	31.7
Bank Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	0	2.4
Bank Time Deposits [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	0	2.4
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	100.1	77.5
Commercial Paper [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Debt Securities	[5]	100.1	$ 77.5
Other Current and Non Current Liabilities [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability		50.3
Other Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Asset Impairment Charges		$ 7
[1]	Contingent consideration asset represents an arrangement for buyers to pay the Company for a business that it has divested. The fair value is determined based on the Company's expectations of future receipts.
[2]	Contingent consideration liabilities represent arrangements to pay the former owners of certain companies that Trimble acquired. The undiscounted maximum payment under the arrangements is $50.3 million at the end of fiscal 2017.
[3]	The Company maintains a self-directed, non-qualified deferred compensation plan for certain executives and other highly compensated employees. The plan assets and liabilities are invested in actively traded mutual funds and individual stocks valued using observable quoted prices in active markets. Deferred compensation plan assets and liabilities are included in Other non-current assets and Other non-current liabilities, respectively, on the Company's Consolidated Balance Sheets.
[4]	Derivative assets and liabilities primarily represent forward currency exchange contracts. The Company typically enters into these contracts to minimize the short-term impact of foreign currency exchange rates on certain trade and inter-company receivables and payables. Derivative assets and liabilities are included in Other current assets and Other current liabilities on the Company's Consolidated Balance Sheets.
[5]	The Company’s available-for sale securities are valued using readily available pricing sources for comparable instruments, or model-driven valuations using significant inputs derived from or corroborated by observable market data, including yield curves and credit ratings.

Fair Value Measurements (Additi

Fair Value Measurements (Additional Fair Value Information Relating To The Company's Financial Instruments Outstanding) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 358.5	$ 216.1	$ 116	$ 148
Cash and Cash Equivalents, Fair Value Disclosure	26.8	22.2
Long-term debt	785.5	489.6
Credit Facility Outstanding	913.9	619.9
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	400	400
Notes Payable, Fair Value Disclosure	430.4	410.6
Revolving Credit Facility [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	389	94
Long-term debt		94
Credit Facility Outstanding	389
Promissory Notes And Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility Outstanding	1.2	0.8
Promissory Notes And Other [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility Outstanding	1.2	0.8
Debt Instrument, Fair Value Disclosure	1.2	0.8
Uncommitted Facilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility Outstanding	128	130
Uncommitted Facilities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term Debt	128	130
Short-term Debt, Fair Value	$ 128	$ 130

Income Taxes (Schedule Of Incom

Income Taxes (Schedule Of Income Before Taxes, United States And Foreign) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Income Tax Disclosure [Abstract]
United States	$ 38	$ 68.4	$ 55.6
Foreign	221.1	108.3	96.2
Income before taxes	$ 259.1	$ 176.7	$ 151.8

Income Taxes (Schedule Of Provi

Income Taxes (Schedule Of Provision For Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Income Tax Disclosure [Abstract]
Current	$ 98.6	$ 34	$ 47.5
Deferred	0.8	(14.3)	(23)
US Federal, Income tax provision	99.4	19.7	24.5
Current	4.5	3.5	5.7
Deferred	(1.1)	0.6	(2.8)
US State, Income tax provision	3.4	4.1	2.9
Current	42.7	28.8	25.4
Deferred	(7.6)	(8.1)	(21.7)
Foreign, Income tax provision	35.1	20.7	3.7
Income tax provision	$ 137.9	$ 44.5	$ 31.1
Effective tax rate	53.00%	25.00%	20.00%

Income Taxes (Schedule Of Diffe

Income Taxes (Schedule Of Difference Between The Tax Provision At The Statutory Federal Income Tax Rate And The Tax Provision As A Percentage Of Income Before Taxes (Effective Tax Rate)) (Details)	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Foreign income taxed at lower rates	(15.00%)	(10.00%)	(11.00%)
US State income taxes	1.00%	2.00%	1.00%
US Federal research and development credits	(3.00%)	(3.00%)	(3.00%)
Stock-based compensation	2.00%	3.00%	1.00%
Excess tax benefit related to stock-based compensation	(3.00%)
Effect of U.S. tax law change	33.00%
Foreign audit reserve release	0.00%	0.00%	(2.00%)
Divestiture	0.00%	(5.00%)	0.00%
Valuation allowance release - foreign	0.00%	0.00%	(3.00%)
Other	3.00%	3.00%	2.00%
Effective tax rate	53.00%	25.00%	20.00%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Apr. 03, 2015	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016	Jan. 31, 2018	Jan. 02, 2015
Operating Loss Carryforwards [Line Items]
Income Tax Expense (Benefit)			$ 137.9	$ 44.5	$ 31.1
Unrecognized Tax Benefits			82.4	72.9	$ 59		$ 51.4
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			68.5	60.5
Decrease in Unrecognized Tax Benefits is Reasonably Possible			6.2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued			$ 12.7	$ 9.3
Statutory federal income tax rate			35.00%	35.00%	35.00%
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards			$ 31.3
Operating Loss Carryforwards, Expiration Date			Jan. 1, 2021
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards			$ 100.2
Tax Cuts and Jobs Act [Member]
Operating Loss Carryforwards [Line Items]
One-time mandatory transition tax on accumulated foreign earnings provisional amount			126
Income Tax Expense (Benefit)			(46.7)
Remeasurement charge of Deferred Tax Asset and Liability			3.3
Tax Cuts and Jobs Act [Member] | State Tax and Foreign Withholding [Member]
Operating Loss Carryforwards [Line Items]
Provisional Amount of State Tax and Foreign Withholding Taxes			2.4
Research Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount			$ 0.4
Tax Credit Carryforward, Expiration Date			Jan. 1, 2030
Research Tax Credit Carryforward [Member] | California Franchise Tax Board [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount			$ 24.2
Tax Year 2010 and 2011 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Notice of Proposed Adjustments - Tax and Penalties	$ 67
Subsequent Event [Member] | Tax Cuts and Jobs Act [Member]
Operating Loss Carryforwards [Line Items]
Statutory federal income tax rate		21.00%
Subsequent Event [Member] | Tax Year 2010 and 2011 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Proposal to Settle Certain Assessments						$ 15.8

Income Taxes (Schedule Of Defer

Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Income Tax Disclosure [Abstract]
Purchased intangibles	$ 69.8	$ 91.9
Depreciation and amortization	13.1	11.7
US residual tax on foreign earnings	0	11.3
Total deferred tax liabilities	82.9	114.9
Inventory valuation differences	4.6	12.9
Expenses not currently deductible	18.1	27.7
US federal tax credit carryforwards	0.2	0.3
Deferred revenue	5.8	6.9
US state tax credit carryforwards	21.7	15.1
Accrued warranty	2	3.1
US federal net operating loss carryforwards	6.4	3.8
Foreign net operating loss carryforwards	20.2	31.2
Stock-based compensation	21.5	31.9
Deferred Tax Liabilities, Other	(4.4)
Other		4.1
Total deferred tax assets	96.1	137
Valuation allowance	(25.2)	(30.6)
Total deferred tax assets	70.9	106.4
Total deferred tax liabilities	(12)	(8.5)
Non-current deferred income tax assets	28.4	30.3
Non-current deferred income tax liabilities	$ (40.4)	$ (38.8)

Income Taxes (Schedule Of Recon

Income Taxes (Schedule Of Reconciliation Of Unrecognized Tax Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Income Tax Disclosure [Abstract]
Unrecognized tax Benefits, Beginning Balance	$ 72.9	$ 59	$ 51.4
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(0.6)
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		7.5	6
Increase related to current year tax positions	12.1	9.9	6.2
Lapse of statute of limitations	(1.6)	(1.4)	(1.5)
Settlement with taxing authorities	(0.4)	(2.1)	(3.1)
Unrecognized tax Benefits, Ending Balance	$ 82.4	$ 72.9	$ 59

Comprehensive Income (Component

Comprehensive Income (Components Of Accumulated Other Comprehensive Income, Net Of Related Tax) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated foreign currency translation adjustments	$ (127.6)	$ (216.8)
Net unrealized loss on short-term investments	(0.2)
Net unrealized actuarial losses	(3.4)	(3.1)
Total accumulated other comprehensive income	$ (131.2)	$ (219.9)

Employee Stock Benefit Plans (C

Employee Stock Benefit Plans (Components of Stock-based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 64.8	$ 52.6	$ 50.1
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	53.3	35.9	27.9
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	5.7	10.9	16.6
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 5.8	$ 5.8	$ 5.6

Employee Stock Benefit Plans (N

Employee Stock Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 29, 2017		Dec. 30, 2016	Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		$ 111.3
Total unamortized compensation expense weighted-average recognition period, in years		2 years 7 months 6 days
Options, Grants in Period		0
Total intrinsic value of options exercised		$ 41.1		$ 36	$ 13.9
Weighted average grant-date fair value of stock options granted				$ 6.03	$ 7.36
Fair Value of Stock Options Vested		$ 6.5		$ 14.6	$ 18.3
Common Stock, Shares Authorized		360,000,000		360,000,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans		800,000		1,100,000	1,000,000
Stock Issued During Period, Value, Employee Stock Purchase Plan		$ 20.4		$ 19.1	$ 18.1
Two Thousand Two Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for grant		74,600,000
Percentage of fair market value of Common Stock		100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		16,100,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	[1]	2,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	[2]	4,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		1,400,000
Weighted Average Grant-Date Fair Value, Granted		$ 40.19	[1]	$ 26.13	$ 23.22
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 40.4		$ 33.6	$ 16.3
Restricted Stock Units (RSUs) [Member] | Two Thousand Two Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants Shares Per Unit on Plan Reserve		1.69
Share units granted vesting period, in years		4 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized		39,000,000
Percentage of lower fair market value to be purchased of common stock through payroll deductions		85.00%
Employee stock options granted term, in months		6 months
Common Stock, Capital Shares Reserved for Future Issuance		9,000,000
Employee Stock Purchase Plan [Member] | Two Thousand Two Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share units granted vesting period, in years		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		7 years
Non Employee Director Stock Options [Member] | Two Thousand Two Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share units granted vesting period, in years		1 year
Market Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		200,000
Market-based and Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		1,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		0
Market-based and Performance-based Restricted Stock Units [Member] | Two Thousand Two Stock Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share units granted vesting period, in years		2 years
Market-based and Performance-based Restricted Stock Units [Member] | Two Thousand Two Stock Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share units granted vesting period, in years		3 years
Time Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		1,300,000
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		500,000
[1]	During fiscal year 2017, the Company granted approximately 1.3 million time-based RSUs, 0.5 million performance-based RSUs and 0.2 million market-based RSUs. As of fiscal year end 2017, the Company has 1.7 million market-based and performance-based RSUs outstanding and none had vested as of fiscal 2017 year end.
[2]	For those shares expected to vest upon the achievement of specified performance goals, the amount represents of estimated number of shares that expect to vest based on the estimated achievement of such specified performance goals as of the end of fiscal 2017

Employee Stock Benefit Plans (S

Employee Stock Benefit Plans (Schedule Of Restricted Stock Units Activity) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares shares in Millions		12 Months Ended
		Dec. 29, 2017		Dec. 30, 2016	Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	[1]	2
Weighted Average Grant-Date Fair Value, Granted		$ 40.19	[1]	$ 26.13	$ 23.22
Shares released, net		(1.4)
Shares released, net, Weighted Average Grant Date Fair Value		$ 28.06
Cancelled and Forfeited		(0.2)
Cancelled and Forfeited, Weighted Average Grant Date Fair Value		$ 30.58
Outstanding, Nonvested, Number		5.1		4.7
Outstanding, Weighted Average Grant Date Fair Value		$ 31.71		$ 26.40
[1]	During fiscal year 2017, the Company granted approximately 1.3 million time-based RSUs, 0.5 million performance-based RSUs and 0.2 million market-based RSUs. As of fiscal year end 2017, the Company has 1.7 million market-based and performance-based RSUs outstanding and none had vested as of fiscal 2017 year end.

Employee Stock Benefit Plans (R

Employee Stock Benefit Plans (Restricted Stock Units Outstanding) (Details) - Restricted Stock Units (RSUs) [Member] shares in Millions, $ in Millions	12 Months Ended
	Dec. 29, 2017USD ($)shares	[1]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Underlying Restricted Stock Units | shares	4.7
Weighted Average Remaining Vesting Period	1 year 4 months 24 days
Aggregate Fair Value | $	$ 192.9
[1]	For those shares expected to vest upon the achievement of specified performance goals, the amount represents of estimated number of shares that expect to vest based on the estimated achievement of such specified performance goals as of the end of fiscal 2017

Employee Stock Benefit Plans (F

Employee Stock Benefit Plans (Fair Value Assumptions of Market Based RSUs) (Details) - Market Based Restricted Stock Units [Member]	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of Market-Based Restricted Stock Units	3 years	3 years 1 month	2 years 7 months
Expected stock price volatility	31.46%	33.80%	30.90%
Risk free interest rate	1.46%	0.90%	0.90%
Expected dividend yield	0.00%	0.00%	0.00%

Employee Stock Benefit Plans 82

Employee Stock Benefit Plans (Schedule Of Options Outstanding And Expected To Vest) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Number Of Shares, Options outstanding	4.4	7.6
Option exercised	(3.2)
Cancelled and Forfeited	0
Options exercisable	4.1
Weighted-Average Exercise Price per Share, Options outstanding	$ 26.12	$ 24.60
Options, Exercises in Period, Weighted Average Exercise Price	22.52
Options, Canceled and Forfeited in Period, Weighted Average Exercise Price	25.97
Options exercisable, Weighted Average Exercise Price	$ 26.07
Weighted-Average Remaining Contractual Term (in years), Options outstanding and expected to vest	2 years 2 months 1 day
Weighted-Average Remaining Contractual Term (in years), Options exercisable	2 years 15 days
Aggregate Intrinsic Value, Options outstanding and expected to vest	$ 63.8
Aggregate Intrinsic Value, Options exercisable	$ 60.1

Employee Stock Benefit Plans 83

Employee Stock Benefit Plans (Schedule Of Weighted-Average Assumptions Used In Employee Stock Purchase Plan) (Details) - Employee Stock Purchase Plan [Member]		12 Months Ended
		Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of purchase, in years		6 months	6 months	6 months
Expected stock price volatility	[1]	32.10%	36.90%	31.30%
Risk free interest rate		0.70%	0.41%	0.08%
Expected dividend yield		0.00%	0.00%	0.00%
[1]	Expected stock price volatility is based on implied volatilities from traded options on the Company’s stock. The Company used implied volatility because it is representative of future stock price trends during the purchase period.

Common Stock Repurchase (Detail

Common Stock Repurchase (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 29, 2017		Dec. 30, 2016	Jan. 01, 2016	Nov. 30, 2017	Sep. 30, 2015	Aug. 31, 2015	Aug. 31, 2014
Stock Repurchased and Retired During Period, Value	$ 288.3		$ 119.5	$ 234.4
Stock Repurchase Program, Remaining Authorized Repurchase Amount	442.2
Retained Earnings [Member]
Stock Repurchased and Retired During Period, Value	$ 246		94.7	180.3
Two Thousand Fourteen Stock Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount								$ 300
Stock Repurchased and Retired During Period, Value				84.3
Two Thousand Fifteen Stock Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount							$ 400
Stock Repurchased and Retired During Period, Value			$ 119.5	$ 75.1
Two Thousand Seventeen Stock Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount					$ 600
Open Market Purchases [Member]
Stock Repurchased During Period, Shares	7.4		4.9	7.5
Stock Repurchased And Retired During Period Shares Average Cost Per Share	$ 39.18		$ 24.39	$ 21.29
Stock Repurchased and Retired During Period, Value				$ 159.4
September 2015 Share Delivery [Member]
Stock Repurchased During Period, Shares				3.7
Accelerated Share Repurchases, Settlement (Payment) or Receipt						$ 75
Accelerated Share Repurchases, Final Price Paid Per Share				$ 20.11
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 40.19	[1]	$ 26.13	$ 23.22
[1]	During fiscal year 2017, the Company granted approximately 1.3 million time-based RSUs, 0.5 million performance-based RSUs and 0.2 million market-based RSUs. As of fiscal year end 2017, the Company has 1.7 million market-based and performance-based RSUs outstanding and none had vested as of fiscal 2017 year end.

Statement Of Cash Flow Data (Sc

Statement Of Cash Flow Data (Schedule Of Supplemental Disclosure Of Cash Flow Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 28.4	$ 27.3	$ 26.5
Income taxes paid	$ 46.6	$ 57.4	$ 54

Selected Quarterly Financial 86

Selected Quarterly Financial Data (Schedule Of Selected Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 29, 2017		Dec. 30, 2016		Jan. 01, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 708.4	$ 670	$ 661.9	$ 613.9	$ 585.5	$ 584.1	$ 609.6	$ 583	$ 2,654.2	[1]	$ 2,362.2	[1]	$ 2,290.4	[1]
Gross margin	370	349.5	346.5	326.6	312.8	309	315.6	300.6	1,392.6		1,238		1,202.2
Net income attributable to Trimble Inc.	$ (35)	$ 55.7	$ 49.9	$ 50.5	$ 37.7	$ 39.2	$ 35.7	$ 19.8	$ 121.1		$ 132.4		$ 121.1
Basic net income per share	$ (0.14)	$ 0.22	$ 0.20	$ 0.20	$ 0.15	$ 0.16	$ 0.14	$ 0.08	$ 0.48		$ 0.53		$ 0.47
Diluted net income per share	$ (0.14)	$ 0.22	$ 0.19	$ 0.20	$ 0.15	$ 0.15	$ 0.14	$ 0.08	$ 0.47		$ 0.52		$ 0.47
[1]	Revenue is attributed to countries based on the location of the customer.

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	Feb. 02, 2018	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Subsequent Event [Line Items]
Credit Facility Outstanding		$ 913.9	$ 619.9
Interest Maturity Period, Variable Rate		1 month
eBuilder [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Transferred	$ 500
Unsecured Debt [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Revolving Credit Facility [Member] | The Bank of Nova Scotia [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Revolving Credit Facility, Current Borrowing Capacity	300
Aggregate Principal Amount	300
Credit Facility Outstanding	$ 300
Federal Funds Effective Swap Rate [Member] | Unsecured Debt [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Revolving Credit Facility [Member] | The Bank of Nova Scotia [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Reserve Adjusted One Month LIBOR [Member] | Unsecured Debt [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Revolving Credit Facility [Member] | The Bank of Nova Scotia [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.125%
Interest Maturity Period, Variable Rate	1 month
Reserve Adjusted Fixed Per Annum Rate [Member] | Unsecured Debt [Member] | Two Thousand Eighteen Interim Credit Facility [Member] | Revolving Credit Facility [Member] | The Bank of Nova Scotia [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.125%
Minimum [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Transferred		$ 2	$ 0.3	$ 2

Valuation And Qualifying Acco88

Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Valuation and Qualifying Accounts [Abstract]
Balance at beginning of period	$ 5	$ 5	$ 7.8
Acquired allowance	0.3	0.3	0.6
Bad debt expense	1.2	3	1.9
Write-offs, net of recoveries	(2.9)	(3.3)	(5.3)
Balance at end of period	$ 3.6	$ 5	$ 5