Belden (BDC) 10-Q 5 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 01, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	BDC
Entity Registrant Name	BELDEN INC.
Entity Central Index Key	913,142
Current Fiscal Year End Date	--12-31
Entity File Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		40,305,408

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 329,027	$ 561,108
Receivables, net	474,870	473,570
Inventories, net	322,194	297,226
Other current assets	50,361	40,167
Total current assets	1,176,452	1,372,071
Property, plant and equipment, less accumulated depreciation	351,628	337,322
Goodwill	1,554,830	1,478,257
Intangible assets, less accumulated amortization	537,087	545,207
Deferred income taxes	63,853	42,549
Other long-lived assets	31,062	65,207
Total assets	3,714,912	3,840,613
Current liabilities:
Accounts payable	304,923	376,277
Accrued liabilities	314,667	302,651
Total current liabilities	619,590	678,928
Long-term debt	1,503,597	1,560,748
Postretirement benefits	124,013	102,085
Deferred income taxes	38,771	27,713
Other long-term liabilities	38,639	36,273
Stockholders’ equity:
Preferred stock	1	1
Common stock	503	503
Additional paid-in capital	1,135,699	1,123,832
Retained earnings	889,189	833,610
Accumulated other comprehensive loss	(85,667)	(98,026)
Treasury stock	(549,899)	(425,685)
Total Belden stockholders’ equity	1,389,826	1,434,235
Noncontrolling interest	476	631
Total stockholders’ equity	1,390,302	1,434,866
Total liabilities and stockholders' equity	$ 3,714,912	$ 3,840,613

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Income Statement [Abstract]
Revenues	$ 655,774	$ 621,745	$ 1,929,978	$ 1,783,759
Cost of sales	(394,917)	(381,896)	(1,180,931)	(1,078,432)
Gross profit	260,857	239,849	749,047	705,327
Selling, general and administrative expenses	(132,716)	(116,129)	(396,430)	(346,786)
Research and development	(33,471)	(35,442)	(107,781)	(105,108)
Amortization of intangibles	(25,533)	(27,162)	(74,990)	(77,944)
Gain from patent litigation	62,141	0	62,141	0
Operating income	131,278	61,116	231,987	175,489
Interest expense, net	(14,472)	(19,385)	(46,538)	(66,424)
Non-operating pension benefit (cost)	1,356	(325)	824	(880)
Loss on debt extinguishment	0	(51,594)	(22,990)	(52,441)
Income (loss) before taxes	118,162	(10,188)	163,283	55,744
Income tax benefit (expense)	(32,304)	11,133	(46,063)	6,673
Net income	85,858	945	117,220	62,417
Less: Net loss attributable to noncontrolling interest	(23)	(82)	(148)	(274)
Net income attributable to Belden	85,881	1,027	117,368	62,691
Less: Preferred stock dividends	8,732	8,732	26,198	26,198
Net income (loss) attributable to Belden common stockholders	$ 77,149	$ (7,705)	$ 91,170	$ 36,493
Weighted average number of common shares and equivalents:
Basic (in shares)	40,510	42,256	40,960	42,251
Diluted (in shares)	47,678	42,256	41,268	42,663
Basic income per share attributable to Belden common stockholders (in usd per share)	$ 1.90	$ (0.18)	$ 2.23	$ 0.86
Diluted income per share attributable to Belden common stockholders (in usd per share)	$ 1.80	$ (0.18)	$ 2.21	$ 0.86
Comprehensive income (loss) attributable to Belden	$ 68,620	$ (18,127)	$ 129,727	$ 17,416
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05	$ 0.15	$ 0.15

Condensed Consolidated Cash Flo

Condensed Consolidated Cash Flow Statements (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017
Cash flows from operating activities:
Net income	$ 117,220	$ 62,417
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	111,896	112,538
Share-based compensation	14,657	13,431
Loss on debt extinguishment	22,990	52,441
Changes in operating assets and liabilities, net of the effects of currency exchange rate changes and acquired businesses:
Receivables	(25,338)	(32,950)
Inventories	(16,642)	(50,232)
Accounts payable	(81,296)	30,290
Accrued liabilities	(29,474)	(54,828)
Income taxes	4,463	(32,071)
Other assets	(13,267)	(9,046)
Other liabilities	(4,350)	11,625
Net cash provided by operating activities	100,859	103,615
Cash flows from investing activities:
Cash used to acquire businesses, net of cash acquired	(84,580)	(166,896)
Capital expenditures	(63,451)	(33,430)
Proceeds from disposal of tangible assets	1,556	15
Proceeds from disposal of business	40,171	0
Net cash used for investing activities	(106,304)	(200,311)
Cash flows from financing activities:
Payments under borrowing arrangements	(484,757)	(1,105,892)
Payments under share repurchase program	(125,000)	(11,508)
Cash dividends paid	(32,421)	(32,535)
Debt issuance costs paid	(7,609)	(16,586)
Withholding tax payments for share-based payment awards	(2,004)	(5,421)
Redemption of stockholders' rights agreement	(411)	0
Borrowings under credit arrangements	431,270	866,700
Net cash used for financing activities	(220,932)	(305,242)
Effect of foreign currency exchange rate changes on cash and cash equivalents	(5,704)	15,185
Decrease in cash and cash equivalents	(232,081)	(386,753)
Cash and cash equivalents, beginning of period	561,108	848,116
Cash and cash equivalents, end of period	$ 329,027	$ 461,363

Condensed Consolidated Stockhol

Condensed Consolidated Stockholders' Equity Statement (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Total	Mandatory Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance (in shares) at Dec. 31, 2017		52	50,335			8,316
Beginning balance at Dec. 31, 2017	$ 1,434,866	$ 1	$ 503	$ 1,123,832	$ 833,610	$ (425,685)	$ (98,026)	$ 631
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principles	(29,041)				(29,041)
Net income (loss)	117,220				117,368			(148)
Other comprehensive income, net of tax	12,352						12,359	(7)
Exercise of stock options, net of tax withholding forfeitures	(765)			(883)		$ 118
Exercise of stock options, net of tax withholding forfeitures (in shares)						20
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,239)			(1,907)		$ 668
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						48
Share repurchase program	$ (125,000)					$ (125,000)
Share repurchase program (in shares)	(1,800)					(1,782)
Share-based compensation	$ 14,657			14,657
Redemption of stockholders' rights agreement	(411)				(411)
Preferred stock dividends	(26,198)				(26,198)
Common stock dividends ($0.15 per share)	(6,139)				(6,139)
Ending balance (in shares) at Sep. 30, 2018		52	50,335			10,030
Ending balance at Sep. 30, 2018	$ 1,390,302	$ 1	$ 503	$ 1,135,699	$ 889,189	$ (549,899)	$ (85,667)	$ 476

Condensed Consolidated Stockh_2

Condensed Consolidated Stockholders' Equity Statement (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in usd per share)	$ 0.05	$ 0.05	$ 0.15	$ 0.15

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying Condensed Consolidated Financial Statements include Belden Inc. and all of its subsidiaries (the Company, us, we, or our). We eliminate all significant affiliate accounts and transactions in consolidation. The accompanying Condensed Consolidated Financial Statements presented as of any date other than December 31, 2017 : • Are prepared from the books and records without audit, and • Are prepared in accordance with the instructions for Form 10-Q and do not include all of the information required by accounting principles generally accepted in the United States for complete statements, but • Include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Supplementary Data contained in our 2017 Annual Report on Form 10-K. Business Description We are a signal transmission solutions provider built around two global business platforms – Enterprise Solutions and Industrial Solutions. Our comprehensive portfolio of signal transmission solutions provides industry leading secure and reliable transmission of data, sound, and video for mission critical applications. Reporting Periods Our fiscal year and fiscal fourth quarter both end on December 31. Our fiscal first quarter ends on the Sunday falling closest to 91 days after December 31, which was April 1, 2018, the 91st day of our fiscal year 2018 . Our fiscal second and third quarters each have 91 days. The nine months ended September 30, 2018 and October 1, 2017 included 273 and 274 days, respectively. Reportable Segments Effective January 1, 2018, we changed our organizational structure and, as a result, now are reporting two segments. The segments formerly known as Broadcast Solutions and Enterprise Solutions now are presented as the Enterprise Solutions segment, and the segments formerly known as Industrial Solutions and Network Solutions now are presented as the Industrial Solutions segment. The reorganization allows us to further accelerate progress in key strategic areas, and the segment consolidation properly aligns our external reporting with the way the businesses are now managed. We have recast the prior period segment information to conform to the change in the composition of these reportable segments. Reclassifications We have made certain reclassifications to the 2017 Condensed Consolidated Financial Statements, including those related to the adoption of Accounting Standards Update No. 2017-07, Compensation - Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (ASU 2017-07) and our segment change, with no impact to reported net income in order to conform to the 2018 presentation. See Note 5. Interim Periods of 2017 During the financial closing process for the fourth quarter of 2017, we determined that certain consolidated financial statement amounts were not recorded correctly in prior interim periods of 2017. We evaluated these errors and concluded that they were not material to any of our previously issued interim financial statements and did not require restatement of the quarters. The errors primarily related to recognizing revenue prior to satisfying all of the delivery criteria in one business within our Enterprise segment. All of the errors were corrected as of December 31, 2017. The impact of the errors in the three months ended October 1, 2017 was an overstatement of revenues and net income of $11.8 million and $2.6 million , respectively. The impact of the errors in the nine months ended October 1, 2017 was an overstatement of revenues and net income of $28.3 million and $6.9 million , respectively. Fair Value Measurement Accounting guidance for fair value measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources or reflect our own assumptions of market participant valuation. The hierarchy is broken down into three levels based on the reliability of the inputs as follows: • Level 1 – Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 – Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets, or financial instruments for which significant inputs are observable, either directly or indirectly; and • Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. As of and during the three and nine months ended September 30, 2018 and October 1, 2017 , we utilized Level 1 inputs to determine the fair value of cash equivalents, and we utilized Level 2 and Level 3 inputs to determine the fair value of net assets acquired in business combinations (see Note 3). We did not have any transfers between Level 1 and Level 2 fair value measurements during the nine months ended September 30, 2018 and October 1, 2017 . Cash and Cash Equivalents We classify cash on hand and deposits in banks, including commercial paper, money market accounts, and other investments with an original maturity of three months or less, that we hold from time to time, as cash and cash equivalents. We periodically have cash equivalents consisting of short-term money market funds and other investments. As of September 30, 2018 , we did not have any such cash equivalents on hand. The primary objective of our investment activities is to preserve our capital for the purpose of funding operations. We do not enter into investments for trading or speculative purposes. Contingent Liabilities We have established liabilities for environmental and legal contingencies that are probable of occurrence and reasonably estimable, the amounts of which are currently not material. We accrue environmental remediation costs based on estimates of known environmental remediation exposures developed in consultation with our environmental consultants and legal counsel. We are, from time to time, subject to routine litigation incidental to our business. These lawsuits primarily involve claims for damages arising out of the use of our products, allegations of patent or trademark infringement, and litigation and administrative proceedings involving employment matters and commercial disputes. Based on facts currently available, we believe the disposition of the claims that are pending or asserted will not have a materially adverse effect on our financial position, results of operations, or cash flow. As of September 30, 2018 , we were party to standby letters of credit, bank guaranties, and surety bonds totaling $7.3 million , $3.2 million , and $2.3 million , respectively. Gain from Patent Litigation On July 5, 2011, our wholly-owned subsidiary, PPC Broadband, Inc. (PPC), filed an action for patent infringement against Corning Optical Communications RF LLC (Corning). The complaint alleged that Corning infringed two of PPC’s patents. In July 2015, a jury found that Corning willfully infringed both patents. In November 2016, following a series of post-trial motions, the trial judge issued rulings for a total judgment in our favor of approximately $61.3 million . In December 2016, Corning appealed the case to the U.S. Court of Appeals for the Federal Circuit. In March 2018, a panel of three judges of the United States Court of Appeals for the Federal Circuit issued a Rule 36 Affirmance of the District Court's final judgment that Corning, among other things, willfully infringed the PPC universal compression patents at issue in the case, and that PPC should be awarded approximately $61.8 million , plus accrued interest. In April 2018, Corning filed a petition for re-hearing, which was denied in May 2018. On July 16, 2018, the District Court ruled that Corning shall pay the judgments. We received a pre-tax amount of approximately $62.1 million from Corning on July 19, 2018. We recorded the $62.1 million of cash received as a pre-tax gain from patent litigation during the three and nine months ended September 30, 2018 . Prior to the third quarter of 2018, we had not recognized any amounts in our consolidated financial statements related to this matter. On September 27, 2018, Corning filed a petition for certiorari review by the U.S. Supreme Court of the District Court’s decision to exercise its discretion to award PPC $23.85 million in enhanced damages based on the totality of the evidence, including a number of factual findings regarding Corning’s willful infringement and egregious conduct. For at least the same reasons why the Federal Circuit affirmed the District Court’s decision to enhance damages, we believe that Corning’s certiorari petition will not be granted, thus exhausting Corning’s opportunities for further appellate relief. Revenue Recognition We recognize revenue consistent with the principles as outlined in the following five step model: (1) identify the contract with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) each performance obligation is satisfied. See Note 2. Subsequent Events We evaluated subsequent events after the balance sheet date through the financial statement issuance date and did not identify any events that would require disclosure. Current-Year Adoption of Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which replaced most existing revenue recognition guidance in U.S. GAAP. The core principle of the ASU is that an entity should recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. ASU 2014-09 requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. We adopted ASU 2014-09 on January 1, 2018, using the modified retrospective method of adoption. Adoption resulted in a $2.6 million , net of tax increase to retained earnings. This adjustment primarily relates to the deferral of costs to obtain a contract that were previously expensed at the beginning of the contract period. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (ASU 2016-15). The new guidance addresses how the following eight specific cash flow items are to be presented: Debt prepayment or debt extinguishment costs; settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies); distributions received from equity method investees; beneficial interests in securitization transactions; and separately identifiable cash flows and application of the predominance principle. We adopted ASU 2016-15 on January 1, 2018. The adoption had no material impact on our statement of cash flows for the nine months ended September 30, 2018 . In October 2016, the FASB issued Accounting Standards Update No. 2016-16, Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16), which requires recognition of the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the standard eliminates the exception to the recognition of current and deferred income taxes for an intra-entity asset transfer other than for inventory until the asset has been sold to an outside party. We adopted ASU 2016-16 on January 1, 2018. The adoption resulted in a $3.0 million and $46.9 million decrease to other current assets and other long-lived assets, respectively, as well as an $18.2 million increase in deferred income tax assets and a $31.7 million decrease to retained earnings on January 1, 2018. The adoption had no material impact on our results of operations. In March 2017, the FASB issued ASU 2017-07, which requires an entity to report the service cost component in the same line item or items as other compensation costs arising from the service rendered by their employees during the period. The other components of net benefit cost are required to be presented in the Statement of Operations separately from the service cost component after Operating Income. Additionally, only the service cost component is eligible for capitalization, when applicable. The standard requires the amendments to be applied retrospectively for the presentation of the service cost component and the other cost components of net periodic pension cost and net periodic OPEB cost in the Statement of Operations and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension and OPEB costs. We adopted ASU 2017-07 on January 1, 2018, and elected to use the practical expedient related to the retrospective presentation requirements. Adoption resulted in a $0.3 million and $0.9 million increase to operating income for the three and nine months ended October 1, 2017 , respectively, but no changes to net income. Pending Adoption of Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (ASU 2016-02), a leasing standard for both lessees and lessors that supersedes the lease requirements in Accounting Standards Codification (ASC) Topic 840, " Leases ." Under its core principle, a lessee will recognize a right-of-use asset and lease liability on the balance sheet for nearly all leased assets. Lessor accounting remains largely consistent with existing U.S. generally accepted accounting principles. The new standard will be effective for us beginning January 1, 2019, and early adoption is permitted. We will adopt ASU 2016-02 on January 1, 2019. In July 2018, the FASB issued ASU No. 2018-11 (“ASU 2018-11”), Leases: Targeted Improvements , which provides an additional (and optional) transition method for adopting the new lease standard. Under this transition method, an entity initially applies the new lease standard at the adoption date and recognizes a cumulative effect adjustment to opening retained earnings in the period of adoption. Currently, we plan on adopting the new lease standard using the newly permitted transition method. Furthermore, we plan to elect the following practical expedients and accounting policy elections upon adoption: (i) the package of practical expedients as defined in ASU 2016-02, (ii) the short-term lease accounting policy election, (iii) the practical expedient to not separate non-lease components from lease components, and (iv) the easement practical expedient, which permits an entity to continue applying its current policy for accounting for land easements that existed as of the effective date of ASU 2016-02. Although we anticipate the adoption of ASU 2016-02 will have a material impact on our consolidated balance sheets, we do not expect the adoption to have a material impact on our consolidated statements of income. We are completing our assessment of the potential impacts of ASU 2016-02 and also implementing changes to our systems and processes. In August 2017, the FASB issued Accounting Standards Update No. ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . The new guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The new guidance also makes certain targeted improvements to simplify the application of hedge accounting guidance and ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. The standard is effective for fiscal years beginning after December 15, 2018, and early adoption is permitted. We do not expect the standard to have a material impact on our consolidated financial statements and related disclosures. In January 2018, the FASB released guidance on the accounting for tax on the global intangible low-taxed income (“GILTI”) provisions of the Tax Cuts and Jobs Act (the “Act”). The GILTI provisions impose a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. The guidance indicates that either accounting for deferred taxes related to GILTI inclusions or to treat any taxes on GILTI inclusions as a period cost are both acceptable methods subject to an accounting policy election. Pending further review of the guidance related to the application of the GILTI provisions and their impact to Belden, we intend to further assess the materiality of the anticipated GILTI inclusion before making a policy election as allowed under current law as of the date of this report. In February 2018, the FASB issued ASU No. 2018-02 (“ASU 2018-02”), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . ASU 2018-02 provides an option to allow reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The new guidance is effective for annual and interim periods beginning after December 15, 2018 with early adoption permitted. We are currently evaluating the impact this update will have on our condensed consolidated financial statements and related disclosures. In August 2018, the Securities and Exchange Commission (“SEC”) adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification , amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. Additionally, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period presented. This final rule is effective on November 5, 2018. We are in the process of evaluating the impact of the final rule on its consolidated financial statements.

Revenues

Revenues	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues On January 1, 2018, we adopted Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the accounting standards in effect for those periods. We recorded a net increase to retained earnings of $2.6 million as of January 1, 2018 due to the cumulative impact of adopting Topic 606, with the impact primarily related to sales commissions and software revenues within our Industrial Solutions segment. There was no significant impact to revenues for the three and nine months ended September 30, 2018 as a result of applying Topic 606. Revenues are recognized when control of the promised goods or services is transferred to our customers and in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. Taxes collected from customers and remitted to governmental authorities are not included in our revenues. The following tables present our revenues disaggregated by major product category. Cable & Connectivity Networking, Software & Security Total Revenues Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ 271,928 $ 116,923 $ 388,851 Industrial Solutions 162,460 104,463 266,923 Total $ 434,388 $ 221,386 $ 655,774 Three Months Ended October 1, 2017 Enterprise Solutions $ 262,212 $ 98,630 $ 360,842 Industrial Solutions 160,520 100,383 260,903 Total $ 422,732 $ 199,013 $ 621,745 Nine Months Ended September 30, 2018 Enterprise Solutions $ 785,970 $ 348,906 $ 1,134,876 Industrial Solutions 498,062 297,040 795,102 Total $ 1,284,032 $ 645,946 $ 1,929,978 Nine Months Ended October 1, 2017 Enterprise Solutions $ 751,459 $ 272,465 $ 1,023,924 Industrial Solutions 466,155 293,680 759,835 Total $ 1,217,614 $ 566,145 $ 1,783,759 The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product. Americas EMEA APAC Total Revenues Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ 254,320 $ 72,467 $ 62,064 $ 388,851 Industrial Solutions 156,334 71,280 39,309 266,923 Total $ 410,654 $ 143,747 $ 101,373 $ 655,774 Three Months Ended October 1, 2017 Enterprise Solutions $ 243,223 $ 61,270 $ 56,349 $ 360,842 Industrial Solutions 150,229 72,718 37,956 260,903 Total $ 393,452 $ 133,988 $ 94,305 $ 621,745 Nine Months Ended September 30, 2018 Enterprise Solutions $ 735,794 $ 228,394 $ 170,688 $ 1,134,876 Industrial Solutions 461,667 217,851 115,584 795,102 Total $ 1,197,461 $ 446,245 $ 286,272 $ 1,929,978 Nine Months Ended October 1, 2017 Enterprise Solutions $ 690,568 $ 168,947 $ 164,409 $ 1,023,924 Industrial Solutions 448,675 205,050 106,110 759,835 Total $ 1,139,243 $ 373,997 $ 270,519 $ 1,783,759 The following tables present our revenues disaggregated by products, including software products, and support and services. Products Support & Services Total Revenues Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ 368,389 $ 20,462 $ 388,851 Industrial Solutions 243,578 23,345 266,923 Total $ 611,967 $ 43,807 $ 655,774 Three Months Ended October 1, 2017 Enterprise Solutions $ 342,216 $ 18,626 $ 360,842 Industrial Solutions 235,378 25,525 260,903 Total $ 577,594 $ 44,151 $ 621,745 Nine Months Ended September 30, 2018 Enterprise Solutions $ 1,080,549 $ 54,327 $ 1,134,876 Industrial Solutions 723,653 71,449 795,102 Total $ 1,804,202 $ 125,776 $ 1,929,978 Nine Months Ended October 1, 2017 Enterprise Solutions $ 968,855 $ 55,069 $ 1,023,924 Industrial Solutions 683,121 76,714 759,835 Total $ 1,651,976 $ 131,783 $ 1,783,759 We generate revenues primarily by selling products that provide secure and reliable transmission of data, sound, and video for mission critical applications. We also generate revenues from providing support and professional services. We sell our products to distributors, end-users, installers, and directly to original equipment manufacturers. At times, we enter into arrangements that involve the delivery of multiple performance obligations. For these arrangements, revenue is allocated to each performance obligation based on its relative selling price and recognized when or as each performance obligation is satisfied. Most of our performance obligations related to the sale of products are satisfied at a point in time when control of the product is transferred based on the shipping terms of the arrangement. Generally, we determine relative selling price using the prices charged to customers on a standalone basis. The amount of consideration we receive and revenue we recognize varies due to rebates, returns, and price adjustments. We estimate the expected rebates, returns, and price adjustments based on an analysis of historical experience, anticipated sales demand, and trends in product pricing. We adjust our estimate of revenue at the earlier of when the most likely amount of consideration we expect to receive changes or when the consideration becomes fixed. Adjustments to revenue for performance obligations satisfied in prior periods was not significant during the three and nine months ended September 30, 2018 . Accrued rebates and accrued returns as of September 30, 2018 totaled $30.1 million and $9.3 million , respectively. Estimated price adjustments recognized against our gross accounts receivable balance as of September 30, 2018 totaled $29.0 million . Depending on the terms of an arrangement, we may defer the recognition of a portion of the consideration received because we have to satisfy a future obligation. Consideration allocated to support services under a support and maintenance contract is typically paid in advance and recognized ratably over the term of the service. Consideration allocated to professional services is recognized when or as the services are performed depending on the terms of the arrangement. As of January 1, 2018, total deferred revenue was $104.4 million , and $50.8 million and $149.4 million was recognized as revenue during the three and nine months ended September 30, 2018 , respectively. As of September 30, 2018 , total deferred revenue was $90.8 million , and of this amount, $78.5 million will be recognized within the next twelve months, and the remaining $12.3 million is long-term and will be recognized over a period greater than twelve months. We expense sales commissions as incurred when the duration of the related revenue arrangement is one year or less. We capitalize sales commissions in other current and long-lived assets on our balance sheet when the duration of the related revenue arrangement is longer than one year, and we amortize it over the related revenue arrangement period. Total capitalized sales commissions was $2.3 million as of September 30, 2018 . Total sales commissions costs were $5.9 million and $18.4 million during the three and nine months ended September 30, 2018 , respectively. Sales commissions are recorded within selling, general and administrative expenses.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions Net-Tech Technology, Inc. We acquired 100% of the shares of Net-Tech Technology, Inc. (NT2) on April 25, 2018 for a preliminary purchase price of $8.5 million that was funded with cash on hand. NT2 is an integrator of optical passive components and network optimization products used within broadband network applications where optical backhaul is used. NT2 is located in the United States. The results of NT2 have been included in our Consolidated Financial Statements from April 25, 2018, and are reported within the Enterprise Solutions segment. The NT2 acquisition was not material to our financial position or results of operations. Snell Advanced Media We acquired 100% of the outstanding ownership interest in Snell Advanced Media (SAM) on February 8, 2018 for a purchase price, net of cash acquired, of $104.5 million that was funded with cash on hand. The acquisition includes a potential earnout, which is based upon future combined earnings of SAM and Grass Valley through December 31, 2019. The maximum earnout consideration is $31.4 million , but based upon a third party valuation specialist using certain assumptions in a discounted cash flow model, the preliminary estimated fair value of the earnout included in the purchase price is $29.3 million . We assumed debt of $19.3 million and paid it off during the first quarter of 2018. SAM designs, manufactures, and sells innovative content production and distribution systems for the broadcast and media markets. SAM is located in the United Kingdom. The results of SAM have been included in our Consolidated Financial Statements from February 8, 2018, and are reported within the Enterprise Solutions segment. The following table summarizes the estimated, preliminary fair value of the assets acquired and the liabilities assumed as of February 8, 2018 (in thousands): Receivables $ 17,182 Inventory 15,312 Prepaid and other current assets 3,375 Property, plant, and equipment 7,789 Intangible assets 54,100 Goodwill 87,853 Deferred taxes 5,476 Other long-lived assets 2,156 Total assets acquired $ 193,243 Accounts payable $ 11,927 Accrued liabilities 21,614 Deferred revenue 3,924 Long-term debt 19,315 Postretirement benefits 31,343 Other long-term liabilities 591 Total liabilities assumed $ 88,714 Net assets $ 104,529 The above purchase price allocation is preliminary, and is subject to revision as additional information about the fair value of individual assets and liabilities becomes available. The preliminary measurement of receivables; inventories; property, plant and equipment; intangible assets; goodwill; deferred income taxes; deferred revenue; and other assets and liabilities are subject to change. A change in the estimated fair value of the net assets acquired will change the amount of the purchase price allocable to goodwill. A single estimate of fair value results from a complex series of judgments about future events and uncertainties and relies heavily on estimates and assumptions. The judgments we have used in estimating the preliminary fair values assigned to each class of acquired assets and assumed liabilities could materially affect the results of our operations. The preliminary fair value of acquired receivables is $17.2 million , which is equivalent to its gross contractual amount. For purposes of the above allocation, we based our estimates of the preliminary fair values for the acquired inventory; property, plant, and equipment; intangible assets; and deferred revenue on preliminary valuation studies performed by a third party valuation firm. We have estimated a preliminary fair value adjustment for inventories based on the estimated selling price of the work-in-process and finished goods acquired at the closing date less the sum of the costs to complete the work-in-process, the costs of disposal, and a reasonable profit allowance for our post acquisition selling efforts. To determine the value of the acquired property, plant, and equipment, we used various valuation methods, including both the market approach, which considers sales prices of similar assets in similar conditions (Level 2 valuation), and the cost approach, which considers the cost to replace the asset adjusted for depreciation (Level 3 valuation). We used various valuation methods including discounted cash flows, lost income, excess earnings, and relief from royalty to estimate the preliminary fair value of the identifiable intangible assets and deferred revenue (Level 3 valuation). Goodwill and other intangible assets reflected above were determined to meet the criteria for recognition apart from tangible assets acquired and liabilities assumed. The goodwill is primarily attributable to expected synergies and the assembled workforce. The expected synergies for the SAM acquisition may be gained from helping broadcast and media content creators, aggregators and distributors significantly improve their effectiveness and efficiency during a period of rapid change in technology, viewer and advertiser behavior and business models. Our tax basis in the acquired goodwill is zero . The intangible assets related to the acquisition consisted of the following: Preliminary Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 38,100 5.0 Customer relationships 12,300 12.0 Sales backlog 2,000 0.3 Trademarks 1,700 0.9 Total intangible assets subject to amortization $ 54,100 Intangible assets not subject to amortization: Goodwill $ 87,853 n/a Total intangible assets not subject to amortization $ 87,853 Total intangible assets $ 141,953 Weighted average amortization period 6.3 years The amortizable intangible assets reflected in the table above were determined by us to have finite lives. The useful life for the developed technology intangible asset was based on the estimated time that the technology provides us with a competitive advantage and thus approximates the period and pattern of consumption of the intangible asset. The useful life for the customer relationship intangible asset was based on our forecasts of estimated sales from recurring customers. The useful life of the backlog intangible asset was based on our estimate of when the ordered items would ship. The useful life for the trademarks was based on the period of time we expect to continue to go to market using the trademarks. Our consolidated revenues for the three and nine months ended September 30, 2018 included an estimated $25.3 million and $77.2 million , respectively, from SAM. Due to the integration of SAM into our existing business, we are unable to reasonably estimate the amount of income before taxes from SAM included in our consolidated financial statements. Our consolidated income before taxes for the three months ended September 30, 2018 included $7.1 million of severance and other restructuring costs, $3.7 million of amortization of intangible assets, and $0.6 million of cost of sales related to the adjustment of acquired inventory to fair value from SAM. Our consolidated income before taxes for the nine months ended September 30, 2018 included $36.6 million of severance and other restructuring costs, $8.7 million of amortization of intangible assets, and $1.8 million of cost of sales related to the adjustment of acquired inventory to fair value from SAM. The following table illustrates the unaudited pro forma effect on operating results as if the SAM acquisition had been completed as of January 1, 2017. Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands, except per share data) (Unaudited) Revenues $ 659,003 $ 644,017 $ 1,944,628 $ 1,857,885 Net income (loss) attributable to Belden common stockholders 92,769 (24,050 ) 126,937 (19,056 ) Diluted income (loss) per share attributable to Belden common stockholders $ 2.13 $ (0.57 ) $ 3.08 $ (0.45 ) For purposes of the pro forma disclosures, the three months ended October 1, 2017 includes nonrecurring expenses related to the acquisition, including severance, restructuring, and acquisition integration costs; amortization of the sales backlog intangible asset; and cost of sales arising from the adjustment of inventory to fair value of $7.1 million , $0.2 million , and $0.2 million , respectively. For purposes of the pro forma disclosures, the nine months ended October 1, 2017 includes nonrecurring expenses related to the acquisition, including severance, restructuring, and acquisition integration costs; amortization of the sales backlog intangible asset; and cost of sales arising from the adjustment of inventory to fair value of $36.6 million , $2.0 million , and $1.7 million , respectively. The above unaudited pro forma financial information is presented for informational purposes only and does not purport to represent what our results of operations would have been had we completed the acquisition on the date assumed, nor is it necessarily indicative of the results that may be expected in future periods. Pro forma adjustments exclude cost savings from any synergies resulting from the acquisition. Thinklogical Holdings, LLC We acquired 100% of the outstanding ownership interest in Thinklogical Holdings, LLC (Thinklogical) on May 31, 2017 for a purchase price, net of cash acquired, of $165.8 million . Thinklogical designs, manufactures, and markets high-bandwidth fiber matrix switches, video, and keyboard/video/mouse extender solutions, camera extenders, and console management solutions. Thinklogical is headquartered in Connecticut. The results of Thinklogical have been included in our Consolidated Financial Statements from May 31, 2017, and are reported within the Enterprise Solutions segment. The following table summarizes the estimated fair value of the assets acquired and the liabilities assumed as of May 31, 2017 (in thousands): Receivables $ 4,355 Inventory 16,424 Prepaid and other current assets 320 Property, plant, and equipment 4,289 Intangible assets 73,400 Goodwill 70,654 Deferred income taxes 598 Total assets acquired $ 170,040 Accounts payable $ 1,231 Accrued liabilities 1,353 Deferred revenue 1,702 Total liabilities assumed $ 4,286 Net assets $ 165,754 A single estimate of fair value results from a complex series of judgments about future events and uncertainties and relies heavily on estimates and assumptions. The judgments we have used in estimating the fair values assigned to each class of acquired assets and assumed liabilities could materially affect the results of our operations. The fair value of acquired receivables is $4.4 million , which is equivalent to its gross contractual amount. For purposes of the above allocation, we based our estimate of the fair value for the acquired inventory, intangible assets, and deferred revenue on a valuation study performed by a third party valuation firm. We used various valuation methods including discounted cash flows, lost income, excess earnings, and relief from royalty to estimate the preliminary fair value of the identifiable intangible assets and deferred revenue (Level 3 valuation). The determination of the fair value of the assets acquired and liabilities assumed and the allocation of the purchase price is complete. Goodwill and other intangible assets reflected above were determined to meet the criteria for recognition apart from tangible assets acquired and liabilities assumed. The goodwill is primarily attributable to expected synergies and the assembled workforce. The expected synergies for the Thinklogical acquisition primarily consist of utilizing Belden's fiber and connectivity portfolio with Thinklogical's connections between matrix switch, control systems, transmitters and source to expand our product portfolio across our segments to both existing and new customers. Our tax basis in the acquired goodwill is approximately $43.3 million and is deductible for tax purposes over a period of 15 years up to the amount of the tax basis. The intangible assets related to the acquisition consisted of the following: Preliminary Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 62,600 10.0 Customer relationships 6,500 8.0 Trademarks 2,900 10.0 Sales backlog 1,400 0.3 Total intangible assets subject to amortization $ 73,400 Intangible assets not subject to amortization: Goodwill $ 70,654 n/a Total intangible assets not subject to amortization $ 70,654 Total intangible assets $ 144,054 Weighted average amortization period 9.6 The amortizable intangible assets reflected in the table above were determined by us to have finite lives. The useful life for the customer relationship intangible asset was based on our forecasts of estimated sales from recurring customers. The useful life for the trademarks was based on the period of time we expect to continue to go to market using the trademarks. The useful life for the developed technology intangible asset was based on the estimated time that the technology provides us with a competitive advantage and thus approximates the period and pattern of consumption of the intangible asset. The useful life of the backlog intangible asset was based on our estimate of when the ordered items would ship. Our consolidated revenues and consolidated income before taxes for the three months ended September 30, 2018 included $15.2 million and $2.6 million , respectively, from Thinklogical. The income before taxes from Thinklogical included $3.2 million of amortization of intangible assets. Our consolidated revenues and consolidated income before taxes for the nine months ended September 30, 2018 included $32.6 million and $(0.5) million , respectively, from Thinklogical. Thinklogical's loss before taxes included $9.5 million of amortization of intangible assets and $0.5 million of severance and other restructuring costs. The following table illustrates the unaudited pro forma effect on operating results as if the Thinklogical acquisition had been completed as of January 1, 2016. Three Months Ended Nine Months Ended October 1, 2017 October 1, 2017 (In thousands, except per share data) (Unaudited) Revenues $ 621,745 $ 1,792,614 Net income (loss) attributable to Belden common stockholders (5,128 ) 37,097 Diluted income (loss) per share attributable to Belden common stockholders $ (0.12 ) $ 0.87 The above unaudited pro forma financial information is presented for informational purposes only and does not purport to represent what our results of operations would have been had we completed the acquisition on the date assumed, nor is it necessarily indicative of the results that may be expected in future periods. Pro forma adjustments exclude cost savings from any synergies resulting from the acquisition.

Disposals

Disposals	9 Months Ended
	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Disposals	Disposals During the fourth quarter of 2016, we committed to a plan to sell our MCS business and Hirschmann JV. The MCS business operated in Germany and the United States and was part of the Industrial Solutions segment, and the Hirschmann JV was an equity method investment located in China. Effective December 31, 2017, we sold the MCS business and Hirschmann JV for a total purchase price of $40.2 million , which was collected in the nine months ended September 30, 2018 . During the nine months ended September 30, 2018, we also sold a previously closed operating facility for net proceeds of $1.5 million and recognized a $0.6 million gain on the sale.

Operating Segments

Operating Segments	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Operating Segments	Reportable Segments Effective January 1, 2018, we changed our organizational structure and, as a result, now are reporting two segments. The segments formerly known as Broadcast Solutions and Enterprise Solutions now are presented as the Enterprise Solutions segment, and the segments formerly known as Industrial Solutions and Network Solutions now are presented as the Industrial Solutions segment. The reorganization allows us to further accelerate progress in key strategic areas, and the segment consolidation properly aligns our external reporting with the way the businesses are now managed. We have recast the prior period segment information to conform to the change in the composition of these reportable segments. This change had no impact to our reporting units for purposes of goodwill impairment testing. The key measures of segment profit or loss reviewed by our chief operating decision maker are Segment Revenues and Segment EBITDA. Segment Revenues represent non-affiliate revenues and include revenues that would have otherwise been recorded by acquired businesses as independent entities but were not recognized in our Consolidated Statements of Operations and Comprehensive Income due to the effects of purchase accounting and the associated write-down of acquired deferred revenue to fair value. Segment EBITDA excludes certain items, including depreciation expense; amortization of intangibles; asset impairment; severance, restructuring, and acquisition integration costs; purchase accounting effects related to acquisitions, such as the adjustment of acquired inventory and deferred revenue to fair value; and other costs. We allocate corporate expenses to the segments for purposes of measuring Segment EBITDA. Corporate expenses are allocated on the basis of each segment’s relative EBITDA prior to the allocation. Our measure of segment assets does not include cash, goodwill, intangible assets, deferred tax assets, or corporate assets. All goodwill is allocated to reporting units of our segments for purposes of impairment testing. Enterprise Solutions Industrial Solutions Total Segments (In thousands) As of and for the three months ended September 30, 2018 Segment revenues $ 392,080 $ 266,923 $ 659,003 Affiliate revenues 1,776 15 1,791 Segment EBITDA 72,210 53,750 125,960 Depreciation expense 7,092 4,579 11,671 Amortization of intangibles 12,322 13,211 25,533 Amortization of software development intangible assets 620 — 620 Severance, restructuring, and acquisition integration costs 9,528 2,160 11,688 Purchase accounting effects of acquisitions 821 — 821 Deferred revenue adjustments 3,229 — 3,229 Segment assets 766,505 448,626 1,215,131 As of and for the three months ended October 1, 2017 Segment revenues $ 360,842 $ 260,903 $ 621,745 Affiliate revenues 971 2 973 Segment EBITDA 62,109 55,747 117,856 Depreciation expense 6,828 4,855 11,683 Amortization of intangibles 13,920 13,242 27,162 Severance, restructuring, and acquisition integration costs 9,309 7,370 16,679 Purchase accounting effects of acquisitions 2,922 — 2,922 Segment assets 658,175 400,538 1,058,713 As of and for the nine months ended September 30, 2018 Segment revenues $ 1,142,765 $ 795,102 $ 1,937,867 Affiliate revenues 4,318 61 4,379 Segment EBITDA 199,943 153,401 353,344 Depreciation expense 21,465 14,097 35,562 Amortization of intangibles 35,301 39,689 74,990 Amortization of software development intangible assets 1,344 — 1,344 Severance, restructuring, and acquisition integration costs 46,949 10,061 57,010 Purchase accounting effects of acquisitions 2,359 — 2,359 Deferred revenue adjustments 7,889 — 7,889 Segment assets 766,505 448,626 1,215,131 As of and for the nine months ended October 1, 2017 Segment revenues $ 1,023,924 $ 759,835 $ 1,783,759 Affiliate revenues 4,084 51 4,135 Segment EBITDA 168,073 153,675 321,748 Depreciation expense 20,129 14,465 34,594 Amortization of intangibles 38,241 39,703 77,944 Severance, restructuring, and acquisition integration costs 23,701 9,138 32,839 Purchase accounting effects of acquisitions 4,089 — 4,089 Segment assets 658,175 400,538 1,058,713 The following table is a reconciliation of the total of the reportable segments’ Revenues and EBITDA to consolidated revenues and consolidated income before taxes, respectively. Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Total Segment Revenues $ 659,003 $ 621,745 $ 1,937,867 $ 1,783,759 Deferred revenue adjustments (1) (3,229 ) — (7,889 ) — Consolidated Revenues $ 655,774 $ 621,745 $ 1,929,978 $ 1,783,759 Total Segment EBITDA $ 125,960 $ 117,856 $ 353,344 $ 321,748 Gain from patent litigation 62,141 — 62,141 — Costs related to patent litigation (2,634 ) — (2,634 ) — Amortization of intangibles (25,533 ) (27,162 ) (74,990 ) (77,944 ) Severance, restructuring, and acquisition integration costs (2) (11,688 ) (16,679 ) (57,010 ) (32,839 ) Depreciation expense (11,671 ) (11,683 ) (35,562 ) (34,594 ) Deferred revenue adjustments (1) (3,229 ) — (7,889 ) — Purchase accounting effects related to acquisitions (3) (821 ) (2,922 ) (2,359 ) (4,089 ) Amortization of software development intangible assets (620 ) — (1,344 ) — Loss on sale of assets — — (94 ) — Income from equity method investment — 2,551 — 5,835 Eliminations (627 ) (845 ) (1,616 ) (2,628 ) Consolidated operating income 131,278 61,116 231,987 175,489 Interest expense, net (14,472 ) (19,385 ) (46,538 ) (66,424 ) Non-operating pension benefit (cost) 1,356 (325 ) 824 (880 ) Loss on debt extinguishment — (51,594 ) (22,990 ) (52,441 ) Consolidated income (loss) before taxes $ 118,162 $ (10,188 ) $ 163,283 $ 55,744 (1) For the three and nine months ended September 30, 2018 , our segment results include revenues that would have been recorded by acquired businesses had they remained as independent entities. Our consolidated results do not include these revenues due to the purchase accounting effect of recording deferred revenue at fair value. (2) See Note 9, Severance, Restructuring, and Acquisition Integration Activities, for details . (3) For the three and nine months ended September 30, 2018 , we recognized cost of sales for the adjustment of acquired inventory to fair value related to the SAM and NT2 acquisitions.

Income per Share

Income per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Income per Share	Income per Share The following table presents the basis for the income per share computations: Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Numerator: Net income $ 85,858 $ 945 $ 117,220 $ 62,417 Less: Net loss attributable to noncontrolling interest (23 ) (82 ) (148 ) (274 ) Less: Preferred stock dividends 8,732 8,732 26,198 26,198 Net income (loss) attributable to Belden common stockholders for basic income (loss) per share $ 77,149 $ (7,705 ) $ 91,170 $ 36,493 Plus: Preferred stock dividends 8,732 — — — Net income (loss) attributable to Belden common stockholders for diluted income (loss) per share $ 85,881 $ (7,705 ) $ 91,170 $ 36,493 Denominator: Weighted average shares outstanding, basic 40,510 42,256 40,960 42,251 Assumed conversion of preferred stock into common stock 6,857 — — — Effect of dilutive common stock equivalents 311 — 308 412 Weighted average shares outstanding, diluted 47,678 42,256 41,268 42,663 For the three and nine months ended September 30, 2018 , diluted weighted average shares outstanding do not include outstanding equity awards of 0.9 million and 0.8 million , respectively, because to do so would have been anti-dilutive. In addition, for the three and nine months ended September 30, 2018 , diluted weighted average shares outstanding do not include outstanding equity awards of 0.3 million and 0.2 million , respectively, because the related performance conditions have not been satisfied. Furthermore, for the nine months ended September 30, 2018 , diluted weighted average shares outstanding do not include the impact of preferred shares that are convertible into 6.9 million common shares, because deducting the preferred stock dividends from net income was more dilutive. For the three and nine months ended October 1, 2017 , diluted weighted average shares outstanding do not include outstanding equity awards of 0.9 million and 0.5 million , respectively, because to do so would have been anti-dilutive. In addition, for both the three and nine months ended October 1, 2017 , diluted weighted average shares outstanding do not include outstanding equity awards of 0.2 million because the related performance conditions have not been satisfied. Furthermore, for the three and nine months ended October 1, 2017 , diluted weighted average shares outstanding do not include the impact of preferred shares that are convertible into 6.8 million and 6.9 million common shares, respectively, because deducting the preferred stock dividends from net income was more dilutive. For purposes of calculating basic earnings per share, unvested restricted stock units are not included in the calculation of basic weighted average shares outstanding until all necessary conditions have been satisfied and issuance of the shares underlying the restricted stock units is no longer contingent. Necessary conditions are not satisfied until the vesting date, at which time holders of our restricted stock units receive shares of our common stock. For purposes of calculating diluted earnings per share, unvested restricted stock units are included to the extent that they are dilutive. In determining whether unvested restricted stock units are dilutive, each issuance of restricted stock units is considered separately. Once a restricted stock unit has vested, it is included in the calculation of both basic and diluted weighted average shares outstanding.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories The major classes of inventories were as follows: September 30, 2018 December 31, 2017 (In thousands) Raw materials $ 164,925 $ 133,311 Work-in-process 45,054 35,807 Finished goods 142,297 153,377 Gross inventories 352,276 322,495 Excess and obsolete reserves (30,082 ) (25,269 ) Net inventories $ 322,194 $ 297,226

Long-Lived Assets

Long-Lived Assets	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Long-Lived Assets	Long-Lived Assets Depreciation and Amortization Expense We recognized depreciation expense of $11.7 million and $35.6 million in the three and nine months ended September 30, 2018 , respectively. We recognized depreciation expense of $11.7 million and $34.6 million in the three and nine months ended October 1, 2017 , respectively. We recognized amortization expense related to our intangible assets of $26.2 million and $76.3 million in the three and nine months ended September 30, 2018 , respectively. We recognized amortization expense related to our intangible assets of $27.2 million and $77.9 million in the three and nine months ended October 1, 2017 , respectively.

Severance, Restructuring, and A

Severance, Restructuring, and Acquisition Integration Activities	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Severance, Restructuring, and Acquisition Integration Activities	Severance, Restructuring, and Acquisition Integration Activities Grass Valley and SAM Integration Program: 2018 During the first quarter of 2018, we began a restructuring program to integrate SAM with Grass Valley. The restructuring and integration activities are focused on achieving desired cost savings by consolidating existing and acquired facilities and other support functions. We recognized $7.1 million and $36.6 million of severance and other restructuring costs for this program during the three and nine months ended September 30, 2018 , respectively. The costs were incurred by the Enterprise Solutions segment. We expect to incur approximately $12 million of additional severance and restructuring costs for this program, which will be incurred during the fourth quarter of 2018 and first quarter of 2019. Industrial Manufacturing Footprint Program: 2016 - 2018 In 2016, we began a program to consolidate our manufacturing footprint. This program is expected to be completed by the end of 2018. We recognized $4.3 million and $15.8 million of severance and other restructuring costs for this program during the three and nine months ended September 30, 2018 , respectively. We recognized $11.4 million and $25.3 million of severance and other restructuring costs for this program during the three and nine months ended October 1, 2017 , respectively. The costs were incurred by the Enterprise Solutions and Industrial Solutions segments, as the manufacturing locations involved in the program serve both platforms. To date, we have incurred a total of $64.1 million in severance and other restructuring costs, including manufacturing inefficiencies for this program. The following table summarizes the costs by segment of the various programs described above as well as other immaterial programs and acquisition integration activities: Severance Other Restructuring and Integration Costs Total Costs Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ (1,283 ) $ 10,811 $ 9,528 Industrial Solutions 136 2,024 2,160 Total $ (1,147 ) $ 12,835 $ 11,688 Three Months Ended October 1, 2017 Enterprise Solutions $ 1,222 $ 8,087 $ 9,309 Industrial Solutions 712 6,658 7,370 Total $ 1,934 $ 14,745 $ 16,679 Nine Months Ended September 30, 2018 Enterprise Solutions $ 10,097 $ 36,852 $ 46,949 Industrial Solutions 378 9,683 10,061 Total $ 10,475 $ 46,535 $ 57,010 Nine Months Ended October 1, 2017 Enterprise Solutions $ 3,398 $ 20,303 $ 23,701 Industrial Solutions 865 8,273 9,138 Total $ 4,263 $ 28,576 $ 32,839 Of the total severance, restructuring, and acquisition integration costs recognized in the three months ended September 30, 2018 , $4.8 million , $6.4 million , and $0.5 million were included in cost of sales; selling, general and administrative expenses; and research and development, respectively. Of the total severance, restructuring, and acquisition integration costs recognized in the three months ended October 1, 2017 , $12.4 million , $4.2 million , and $0.1 million were included in cost of sales; selling, general and administrative expenses; and research and development, respectively. Of the total severance, restructuring, and acquisition integration costs recognized in the nine months ended September 30, 2018 , $21.4 million , $30.3 million , and $5.3 million were included in cost of sales; selling, general and administrative expenses; and research and development, respectively. Of the total severance, restructuring, and acquisition integration costs recognized in the nine months ended October 1, 2017 , $26.5 million , $6.2 million , and $0.1 million were included in cost of sales; selling, general and administrative expenses; and research and development, respectively. The net credit to severance expense for the Enterprise Solutions segment in the three months ended September 30, 2018 is attributable to voluntary employee turnover in advance of receiving severance benefits, thus resulting in the reversal of previously accrued severance expense. The other restructuring and integration costs primarily consisted of equipment transfer, costs to consolidate operating and support facilities, retention bonuses, relocation, travel, legal, and other costs. The majority of the other restructuring and integration costs related to these actions were paid as incurred or are payable within the next 60 days . Accrued Severance The table below summarizes the significant severance activity that occurred during the year for the Grass Valley and SAM Integration Program described above. The balances are included in accrued liabilities. Grass Valley and SAM Integration Program (In thousands) Balance at December 31, 2017 $ — New charges 456 Cash payments (50 ) Balance at April 1, 2018 $ 406 New charges 10,714 Cash payments (7,556 ) Foreign currency translation (4 ) Balance at July 1, 2018 $ 3,560 New charges 121 Cash payments (989 ) Foreign currency translation (9 ) Other adjustments (1,531 ) Balance at September 30, 2018 $ 1,152

Long-Term Debt and Other Borrow

Long-Term Debt and Other Borrowing Arrangements	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Long-Term Debt and Other Borrowing Arrangements	Long-Term Debt and Other Borrowing Arrangements The carrying values of our long-term debt were as follows: September 30, 2018 December 31, 2017 (In thousands) Revolving credit agreement due 2022 $ — $ — Senior subordinated notes: 3.875% Senior subordinated notes due 2028 411,110 — 3.375% Senior subordinated notes due 2027 528,570 540,810 4.125% Senior subordinated notes due 2026 234,920 240,360 2.875% Senior subordinated notes due 2025 352,380 360,540 5.25% Senior subordinated notes due 2024 — 200,000 5.50% Senior subordinated notes due 2023 — 242,522 Total senior subordinated notes 1,526,980 1,584,232 Less unamortized debt issuance costs (23,383 ) (23,484 ) Long-term debt $ 1,503,597 $ 1,560,748 Revolving Credit Agreement due 2022 Our Revolving Credit Agreement provides a $400.0 million multi-currency asset-based revolving credit facility (The Revolver). The borrowing base under the Revolver includes eligible accounts receivable; inventory; and property, plant and equipment of certain of our subsidiaries in the U.S., Canada, Germany, and the Netherlands. The maturity date of the Revolver is May 16, 2022. Interest on outstanding borrowings is variable, based upon LIBOR or other similar indices in foreign jurisdictions, plus a spread that ranges from 1.25% - 1.75% , depending upon our leverage position. We pay a commitment fee on our available borrowing capacity of 0.25% . In the event we borrow more than 90% of our borrowing base, we are subject to a fixed charge coverage ratio covenant. As of September 30, 2018 , we had no borrowings outstanding on the Revolver, and our available borrowing capacity was $359.8 million . Senior Subordinated Notes In March 2018, we completed an offering for €350.0 million ( $431.3 million at issuance) aggregate principal amount of 3.875% senior subordinated notes due 2028 (the 2028 Notes). The carrying value of the 2028 Notes as of September 30, 2018 is $411.1 million . The 2028 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2028 Notes rank equal in right of payment with our senior subordinated notes due 2027, 2026, and 2025 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on March 15 and September 15 of each year, beginning on September 15, 2018. We paid approximately $7.5 million of fees associated with the issuance of the 2028 Notes, which will be amortized over the life of the 2028 Notes using the effective interest method. We used the net proceeds from this offering and cash on hand to repurchase the 2023 and 2024 Notes - see further discussion below. We have outstanding €450.0 million aggregate principal amount of 3.375% senior subordinated notes due 2027 (the 2027 Notes). The carrying value of the 2027 Notes as of September 30, 2018 is $528.6 million . The 2027 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2027 Notes rank equal in right of payment with our senior subordinated notes due 2028, 2026, and 2025 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on January 15 and July 15 of each year. We have outstanding €200.0 million aggregate principal amount of 4.125% senior subordinated notes due 2026 (the 2026 Notes). The carrying value of the 2026 Notes as of September 30, 2018 is $234.9 million . The 2026 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2026 Notes rank equal in right of payment with our senior subordinated notes due 2028, 2027, and 2025 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on April 15 and October 15 of each year. We have outstanding €300.0 million aggregate principal amount of 2.875% senior subordinated notes due 2025 (the 2025 Notes). The carrying value of the 2025 Notes as of September 30, 2018 is $352.4 million . The 2025 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2025 Notes rank equal in right of payment with our senior subordinated notes due 2028, 2027, and 2026 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on March 15 and September 15 of each year. We had outstanding $200.0 million aggregate principal amount of 5.25% senior subordinated notes due 2024 (the 2024 Notes). In March 2018, we repurchased $188.7 million of the $200.0 million 2024 Notes outstanding for cash consideration of $199.8 million , including a prepayment penalty and recognized a $13.8 million loss on debt extinguishment including the write-off of unamortized debt issuance costs. In April 2018, we repurchased the remaining 2024 Notes outstanding for cash consideration of $11.9 million , including a prepayment penalty, and recognized a $0.8 million loss on debt extinguishment including the write-off of unamortized debt issuance costs. We had outstanding €200.0 million aggregate principal amount of 5.5% senior subordinated notes due 2023 (the 2023 Notes). In March 2018, we repurchased €143.1 million of the €200.0 million 2023 Notes outstanding for cash consideration of €147.8 million ( $182.1 million ), including a prepayment penalty and recognized a $6.2 million loss on debt extinguishment including the write-off of unamortized debt issuance costs. In April 2018, we repurchased the remaining 2023 Notes outstanding for cash consideration of €58.5 million ( $71.6 million ), including a prepayment penalty, and recognized a $2.2 million loss on debt extinguishment including the write-off of unamortized debt issuance costs. Fair Value of Long-Term Debt The fair value of our senior subordinated notes as of September 30, 2018 was approximately $1,526.9 million based on quoted prices of the debt instruments in inactive markets (Level 2 valuation). This amount represents the fair value of our senior subordinated notes with a carrying value of $1,527.0 million as of September 30, 2018 .

Net Investment Hedge

Net Investment Hedge	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net Investment Hedge	Net Investment Hedge All of our euro denominated notes were issued by Belden Inc., a USD functional currency entity. As of September 30, 2018 , all of our outstanding foreign denominated debt is designated as a net investment hedge on the foreign currency risk of our net investment in our euro foreign operations. The objective of the hedge is to protect the net investment in the foreign operation against adverse changes in exchange rates. The transaction gain or loss is reported in the cumulative translation adjustment section of other comprehensive income. The amount of the cumulative translation adjustment associated with these notes for the nine month periods ended September 30, 2018 and October 1, 2017 was a gain of $46.3 million and a loss of $25.3 million , respectively.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and nine months ended September 30, 2018 , we recognized income tax expense of $32.3 million and $46.1 million , respectively, representing an effective tax rate of 27.3% and 28.2% , respectively. The effective tax rate was impacted by the following significant factors: • We recognized income tax expense of $3.8 million and $4.3 million , respectively, in the three and nine months ended September 30, 2018 as a result of changes in our valuation allowance for the “Tax Cuts and Jobs Act” (the Act). The amount of this adjustment remains provisional under Staff Accounting Bulletin No. 118 (SAB 118) as of the date of this report. • We recognized income tax expense of $1.8 million in the nine months ended September 30, 2018 as a result of a change in our valuation allowance on foreign tax credits associated with our euro debt refinancing. • We recognized an income tax benefit of $3.3 million and $4.4 million , respectively, in the three and nine months ended September 30, 2018 primarily related to certain foreign tax credits. • We recognized an income tax benefit of $1.2 million in the nine months ended September 30, 2018 due to a decrease in reserves for uncertain tax positions of prior years. On December 22, 2017, the Act was signed into law, making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of U.S. international taxation from a worldwide tax system to a territorial tax system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. On December 22, 2017, SAB 118 was issued to address the application of US GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act. The issuance of proposed regulations regarding GILTI and the one-time transition tax on the mandatory deemed repatriation of foreign earnings as well as the IRS notice addressing IRC section 162(m) has resulted in refinements to the provisional amounts initially recorded for the valuation allowance on certain foreign tax credits in 2017, certain covered employee compensation associated with the amendments to IRC section 162(m), the one-time transition tax on the mandatory deemed repatriation of foreign earnings and the estimated tax expense associated with the GILTI taxable inclusion. As a result, we recorded an adjustment to the valuation allowance on certain foreign tax credits and an adjustment to the deferred tax asset associated with certain covered employee compensation. Additional work is still necessary for a more detailed analysis of all provisional amounts associated with the Act including the remeasurement of certain deferred tax assets and liabilities, the one-time transition tax on the mandatory deemed repatriation of foreign earnings, the valuation allowance on certain foreign tax credits, and the non-deductibility of certain covered employee compensation associated with the amendments to IRC section 162(m). The transition tax on the mandatory deemed repatriation of foreign earnings will be finalized in the fourth quarter 2018 when the tax return is filed, and any subsequent adjustment to all other provisional amounts will be recorded to tax expense in the fourth quarter 2018 when the analysis is complete. All adjustments related to the Act remain provisional as of the date of this report. Our income tax expense and effective tax rate in future periods may be impacted by many factors, including our geographic mix of income and changes in tax laws. We recognized an income tax benefit of $11.1 million and $6.7 million for the three and nine months ended October 1, 2017 , respectively, representing effective tax rates of 109.3% and (12.0)% , respectively. The effective tax rates were impacted by the following significant factors: • We recognized an income tax benefit of $2.5 million and $8.4 million in the three and nine months ended October 1, 2017 , respectively, as a result of the implementation of a foreign tax credit planning strategy. • Foreign tax rate differences reduced our income tax expense by approximately $1.4 million and $8.4 million in the three and nine months ended October 1, 2017 , respectively. The statutory tax rates associated with our foreign earnings generally are lower than the 2017 statutory U.S. tax rate of 35% . This had the greatest impact on our income before taxes that is generated in Germany, Canada, and the Netherlands, which have statutory tax rates of approximately 28% , 26% , and 25% , respectively. • We also recognized an income tax benefit of $6.4 million and $11.7 million in the three and nine months ended October 1, 2017 , respectively, related to non-taxable currency translation gains. All other items impacting the effective tax rate represented a net expense of $2.6 million and $2.3 million in the three and nine months ended October 1, 2017 , respectively.

Pension and Other Postretiremen

Pension and Other Postretirement Obligations	9 Months Ended
	Sep. 30, 2018
Retirement Benefits [Abstract]
Pension and Other Postretirement Obligations	Pension and Other Postretirement Obligations The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: Pension Obligations Other Postretirement Obligations Three Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Service cost $ 1,717 $ 1,206 $ 14 $ 14 Interest cost 2,011 1,822 257 344 Expected return on plan assets (4,660 ) (2,487 ) — — Amortization of prior service credit (37 ) (10 ) — — Actuarial losses 1,073 633 — 23 Net periodic cost $ 104 $ 1,164 $ 271 $ 381 Nine Months Ended Service cost $ 3,792 $ 3,549 $ 40 $ 41 Interest cost 5,792 5,391 781 1,000 Expected return on plan assets (9,688 ) (7,415 ) — — Amortization of prior service credit (59 ) (30 ) — — Actuarial losses 2,350 1,866 — 68 Net periodic cost $ 2,187 $ 3,361 $ 821 $ 1,109

Comprehensive Income and Accumu

Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	Comprehensive Income and Accumulated Other Comprehensive Income (Loss) The following table summarizes total comprehensive income: Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Net income $ 85,858 $ 945 $ 117,220 $ 62,417 Foreign currency translation gain (loss), net of $0.5 million, $1.1 million, $0.7 million, and $1.5 million tax, respectively (17,904 ) (19,535 ) 10,943 (46,478 ) Adjustments to pension and postretirement liability, net of $0.4 million, $0.2 million, $0.9 million, and $0.7 million tax, respectively 637 397 1,409 1,171 Total comprehensive income (loss) 68,591 (18,193 ) 129,572 17,110 Less: Comprehensive loss attributable to noncontrolling interest (29 ) (66 ) (155 ) (306 ) Comprehensive income (loss) attributable to Belden $ 68,620 $ (18,127 ) $ 129,727 $ 17,416 The accumulated balances related to each component of other comprehensive income (loss), net of tax, are as follows: Foreign Currency Translation Component Pension and Other Postretirement Benefit Plans Accumulated Other Comprehensive Income (Loss) (In thousands) Balance at December 31, 2017 $ (69,691 ) $ (28,335 ) $ (98,026 ) Other comprehensive income attributable to Belden before reclassifications 10,950 — 10,950 Amounts reclassified from accumulated other comprehensive income — 1,409 1,409 Net current period other comprehensive gain attributable to Belden 10,950 1,409 12,359 Balance at September 30, 2018 $ (58,741 ) $ (26,926 ) $ (85,667 ) The following table summarizes the effects of reclassifications from accumulated other comprehensive income (loss) for the nine months ended September 30, 2018 : Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (In thousands) Amortization of pension and other postretirement benefit plan items: Actuarial losses $ 2,350 (1) Prior service credit (59 ) (1) Total before tax 2,291 Tax benefit (882 ) Total net of tax $ 1,409 (1) The amortization of these accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit costs (see Note 13).

Preferred Stock

Preferred Stock	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Preferred Stock	Preferred Stock In 2016, we issued 5.2 million depositary shares, each of which represents 1/100th interest in a share of 6.75% Series B Mandatory Convertible Preferred Stock (the Preferred Stock), for an offering price of $100 per depositary share. Holders of the Preferred Stock may elect to convert their shares into common stock at any time prior to the mandatory conversion date. Unless earlier converted, each share of Preferred Stock will automatically convert into common stock on or around July 15, 2019 into between 120.46 and 132.50 shares of Belden common stock, subject to customary anti-dilution adjustments. This represents a range of 6.2 million to 6.9 million shares of Belden common stock to be issued upon conversion. The number of shares of Belden common stock issuable upon the mandatory conversion of the Preferred Stock will be determined based upon the volume-weighted average price of Belden’s common stock over the 20 day trading period beginning on, and including, the 22nd scheduled trading day prior to July 15, 2019. The net proceeds from this offering were approximately $501 million . With respect to dividend and liquidation rights, the Preferred Stock ranks senior to our common stock and junior to all of our existing and future indebtedness. During the three and nine months ended September 30, 2018 and October 1, 2017, dividends on the Preferred Stock were $8.7 million and $26.2 million , respectively.

Share Repurchases

Share Repurchases	9 Months Ended
	Sep. 30, 2018
Text Block [Abstract]
Share Repurchases	Share Repurchases On May 25, 2017, our Board of Directors authorized a share repurchase program, which allows us to purchase up to $200.0 million of our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. This program is funded with cash on hand and cash flows from operating activities. The program does not have an expiration date and may be suspended at any time at the discretion of the Company. During the three months ended September 30, 2018 , we repurchased 0.3 million shares of our common stock under the share repurchase program for an aggregate cost of $25.0 million and an average price per share of $72.62 . During the nine months ended September 30, 2018 , we repurchased 1.8 million shares of our common stock under the share repurchase program for an aggregate cost of $125.0 million and an average price per share of $70.13 .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Condensed Consolidated Financial Statements include Belden Inc. and all of its subsidiaries (the Company, us, we, or our). We eliminate all significant affiliate accounts and transactions in consolidation. The accompanying Condensed Consolidated Financial Statements presented as of any date other than December 31, 2017 : • Are prepared from the books and records without audit, and • Are prepared in accordance with the instructions for Form 10-Q and do not include all of the information required by accounting principles generally accepted in the United States for complete statements, but • Include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Supplementary Data contained in our 2017 Annual Report on Form 10-K
Business Description	Business Description We are a signal transmission solutions provider built around two global business platforms – Enterprise Solutions and Industrial Solutions. Our comprehensive portfolio of signal transmission solutions provides industry leading secure and reliable transmission of data, sound, and video for mission critical applications.
Reporting Periods	Reporting Periods Our fiscal year and fiscal fourth quarter both end on December 31. Our fiscal first quarter ends on the Sunday falling closest to 91 days after December 31, which was April 1, 2018, the 91st day of our fiscal year 2018 . Our fiscal second and third quarters each have 91 days. The nine months ended September 30, 2018 and October 1, 2017 included 273 and 274 days, respectively.
Operating Segments	Reportable Segments Effective January 1, 2018, we changed our organizational structure and, as a result, now are reporting two segments. The segments formerly known as Broadcast Solutions and Enterprise Solutions now are presented as the Enterprise Solutions segment, and the segments formerly known as Industrial Solutions and Network Solutions now are presented as the Industrial Solutions segment. The reorganization allows us to further accelerate progress in key strategic areas, and the segment consolidation properly aligns our external reporting with the way the businesses are now managed. We have recast the prior period segment information to conform to the change in the composition of these reportable segments.
Reclassifications	Reclassifications We have made certain reclassifications to the 2017 Condensed Consolidated Financial Statements, including those related to the adoption of Accounting Standards Update No. 2017-07, Compensation - Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (ASU 2017-07) and our segment change, with no impact to reported net income in order to conform to the 2018 presentation. See Note 5.
Fair Value Measurement	Fair Value Measurement Accounting guidance for fair value measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources or reflect our own assumptions of market participant valuation. The hierarchy is broken down into three levels based on the reliability of the inputs as follows: • Level 1 – Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 – Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets, or financial instruments for which significant inputs are observable, either directly or indirectly; and • Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. As of and during the three and nine months ended September 30, 2018 and October 1, 2017 , we utilized Level 1 inputs to determine the fair value of cash equivalents, and we utilized Level 2 and Level 3 inputs to determine the fair value of net assets acquired in business combinations (see Note 3).
Cash and Cash Equivalents	Cash and Cash Equivalents We classify cash on hand and deposits in banks, including commercial paper, money market accounts, and other investments with an original maturity of three months or less, that we hold from time to time, as cash and cash equivalents. We periodically have cash equivalents consisting of short-term money market funds and other investments. As of September 30, 2018 , we did not have any such cash equivalents on hand. The primary objective of our investment activities is to preserve our capital for the purpose of funding operations. We do not enter into investments for trading or speculative purposes.
Contingent Liabilities	Contingent Liabilities We have established liabilities for environmental and legal contingencies that are probable of occurrence and reasonably estimable, the amounts of which are currently not material. We accrue environmental remediation costs based on estimates of known environmental remediation exposures developed in consultation with our environmental consultants and legal counsel. We are, from time to time, subject to routine litigation incidental to our business. These lawsuits primarily involve claims for damages arising out of the use of our products, allegations of patent or trademark infringement, and litigation and administrative proceedings involving employment matters and commercial disputes. Based on facts currently available, we believe the disposition of the claims that are pending or asserted will not have a materially adverse effect on our financial position, results of operations, or cash flow.
Revenue Recognition	Revenue Recognition We recognize revenue consistent with the principles as outlined in the following five step model: (1) identify the contract with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) each performance obligation is satisfied. See Note 2.
Subsequent Events	Subsequent Events We evaluated subsequent events after the balance sheet date through the financial statement issuance date and did not identify any events that would require disclosure.
New Accounting Pronouncements	Current-Year Adoption of Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which replaced most existing revenue recognition guidance in U.S. GAAP. The core principle of the ASU is that an entity should recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. ASU 2014-09 requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. We adopted ASU 2014-09 on January 1, 2018, using the modified retrospective method of adoption. Adoption resulted in a $2.6 million , net of tax increase to retained earnings. This adjustment primarily relates to the deferral of costs to obtain a contract that were previously expensed at the beginning of the contract period. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (ASU 2016-15). The new guidance addresses how the following eight specific cash flow items are to be presented: Debt prepayment or debt extinguishment costs; settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies); distributions received from equity method investees; beneficial interests in securitization transactions; and separately identifiable cash flows and application of the predominance principle. We adopted ASU 2016-15 on January 1, 2018. The adoption had no material impact on our statement of cash flows for the nine months ended September 30, 2018 . In October 2016, the FASB issued Accounting Standards Update No. 2016-16, Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16), which requires recognition of the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the standard eliminates the exception to the recognition of current and deferred income taxes for an intra-entity asset transfer other than for inventory until the asset has been sold to an outside party. We adopted ASU 2016-16 on January 1, 2018. The adoption resulted in a $3.0 million and $46.9 million decrease to other current assets and other long-lived assets, respectively, as well as an $18.2 million increase in deferred income tax assets and a $31.7 million decrease to retained earnings on January 1, 2018. The adoption had no material impact on our results of operations. In March 2017, the FASB issued ASU 2017-07, which requires an entity to report the service cost component in the same line item or items as other compensation costs arising from the service rendered by their employees during the period. The other components of net benefit cost are required to be presented in the Statement of Operations separately from the service cost component after Operating Income. Additionally, only the service cost component is eligible for capitalization, when applicable. The standard requires the amendments to be applied retrospectively for the presentation of the service cost component and the other cost components of net periodic pension cost and net periodic OPEB cost in the Statement of Operations and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension and OPEB costs. We adopted ASU 2017-07 on January 1, 2018, and elected to use the practical expedient related to the retrospective presentation requirements. Adoption resulted in a $0.3 million and $0.9 million increase to operating income for the three and nine months ended October 1, 2017 , respectively, but no changes to net income. Pending Adoption of Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (ASU 2016-02), a leasing standard for both lessees and lessors that supersedes the lease requirements in Accounting Standards Codification (ASC) Topic 840, " Leases ." Under its core principle, a lessee will recognize a right-of-use asset and lease liability on the balance sheet for nearly all leased assets. Lessor accounting remains largely consistent with existing U.S. generally accepted accounting principles. The new standard will be effective for us beginning January 1, 2019, and early adoption is permitted. We will adopt ASU 2016-02 on January 1, 2019. In July 2018, the FASB issued ASU No. 2018-11 (“ASU 2018-11”), Leases: Targeted Improvements , which provides an additional (and optional) transition method for adopting the new lease standard. Under this transition method, an entity initially applies the new lease standard at the adoption date and recognizes a cumulative effect adjustment to opening retained earnings in the period of adoption. Currently, we plan on adopting the new lease standard using the newly permitted transition method. Furthermore, we plan to elect the following practical expedients and accounting policy elections upon adoption: (i) the package of practical expedients as defined in ASU 2016-02, (ii) the short-term lease accounting policy election, (iii) the practical expedient to not separate non-lease components from lease components, and (iv) the easement practical expedient, which permits an entity to continue applying its current policy for accounting for land easements that existed as of the effective date of ASU 2016-02. Although we anticipate the adoption of ASU 2016-02 will have a material impact on our consolidated balance sheets, we do not expect the adoption to have a material impact on our consolidated statements of income. We are completing our assessment of the potential impacts of ASU 2016-02 and also implementing changes to our systems and processes. In August 2017, the FASB issued Accounting Standards Update No. ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . The new guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The new guidance also makes certain targeted improvements to simplify the application of hedge accounting guidance and ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. The standard is effective for fiscal years beginning after December 15, 2018, and early adoption is permitted. We do not expect the standard to have a material impact on our consolidated financial statements and related disclosures. In January 2018, the FASB released guidance on the accounting for tax on the global intangible low-taxed income (“GILTI”) provisions of the Tax Cuts and Jobs Act (the “Act”). The GILTI provisions impose a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. The guidance indicates that either accounting for deferred taxes related to GILTI inclusions or to treat any taxes on GILTI inclusions as a period cost are both acceptable methods subject to an accounting policy election. Pending further review of the guidance related to the application of the GILTI provisions and their impact to Belden, we intend to further assess the materiality of the anticipated GILTI inclusion before making a policy election as allowed under current law as of the date of this report.

Revenues (Tables)

Revenues (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables present our revenues disaggregated by major product category. Cable & Connectivity Networking, Software & Security Total Revenues Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ 271,928 $ 116,923 $ 388,851 Industrial Solutions 162,460 104,463 266,923 Total $ 434,388 $ 221,386 $ 655,774 Three Months Ended October 1, 2017 Enterprise Solutions $ 262,212 $ 98,630 $ 360,842 Industrial Solutions 160,520 100,383 260,903 Total $ 422,732 $ 199,013 $ 621,745 Nine Months Ended September 30, 2018 Enterprise Solutions $ 785,970 $ 348,906 $ 1,134,876 Industrial Solutions 498,062 297,040 795,102 Total $ 1,284,032 $ 645,946 $ 1,929,978 Nine Months Ended October 1, 2017 Enterprise Solutions $ 751,459 $ 272,465 $ 1,023,924 Industrial Solutions 466,155 293,680 759,835 Total $ 1,217,614 $ 566,145 $ 1,783,759 The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product. Americas EMEA APAC Total Revenues Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ 254,320 $ 72,467 $ 62,064 $ 388,851 Industrial Solutions 156,334 71,280 39,309 266,923 Total $ 410,654 $ 143,747 $ 101,373 $ 655,774 Three Months Ended October 1, 2017 Enterprise Solutions $ 243,223 $ 61,270 $ 56,349 $ 360,842 Industrial Solutions 150,229 72,718 37,956 260,903 Total $ 393,452 $ 133,988 $ 94,305 $ 621,745 Nine Months Ended September 30, 2018 Enterprise Solutions $ 735,794 $ 228,394 $ 170,688 $ 1,134,876 Industrial Solutions 461,667 217,851 115,584 795,102 Total $ 1,197,461 $ 446,245 $ 286,272 $ 1,929,978 Nine Months Ended October 1, 2017 Enterprise Solutions $ 690,568 $ 168,947 $ 164,409 $ 1,023,924 Industrial Solutions 448,675 205,050 106,110 759,835 Total $ 1,139,243 $ 373,997 $ 270,519 $ 1,783,759 The following tables present our revenues disaggregated by products, including software products, and support and services. Products Support & Services Total Revenues Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ 368,389 $ 20,462 $ 388,851 Industrial Solutions 243,578 23,345 266,923 Total $ 611,967 $ 43,807 $ 655,774 Three Months Ended October 1, 2017 Enterprise Solutions $ 342,216 $ 18,626 $ 360,842 Industrial Solutions 235,378 25,525 260,903 Total $ 577,594 $ 44,151 $ 621,745 Nine Months Ended September 30, 2018 Enterprise Solutions $ 1,080,549 $ 54,327 $ 1,134,876 Industrial Solutions 723,653 71,449 795,102 Total $ 1,804,202 $ 125,776 $ 1,929,978 Nine Months Ended October 1, 2017 Enterprise Solutions $ 968,855 $ 55,069 $ 1,023,924 Industrial Solutions 683,121 76,714 759,835 Total $ 1,651,976 $ 131,783 $ 1,783,759

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair value of the assets acquired and the liabilities assumed as of May 31, 2017 (in thousands): Receivables $ 4,355 Inventory 16,424 Prepaid and other current assets 320 Property, plant, and equipment 4,289 Intangible assets 73,400 Goodwill 70,654 Deferred income taxes 598 Total assets acquired $ 170,040 Accounts payable $ 1,231 Accrued liabilities 1,353 Deferred revenue 1,702 Total liabilities assumed $ 4,286 Net assets $ 165,754 The following table summarizes the estimated, preliminary fair value of the assets acquired and the liabilities assumed as of February 8, 2018 (in thousands): Receivables $ 17,182 Inventory 15,312 Prepaid and other current assets 3,375 Property, plant, and equipment 7,789 Intangible assets 54,100 Goodwill 87,853 Deferred taxes 5,476 Other long-lived assets 2,156 Total assets acquired $ 193,243 Accounts payable $ 11,927 Accrued liabilities 21,614 Deferred revenue 3,924 Long-term debt 19,315 Postretirement benefits 31,343 Other long-term liabilities 591 Total liabilities assumed $ 88,714 Net assets $ 104,529
Schedule of Acquired Intangible Assets	The intangible assets related to the acquisition consisted of the following: Preliminary Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 62,600 10.0 Customer relationships 6,500 8.0 Trademarks 2,900 10.0 Sales backlog 1,400 0.3 Total intangible assets subject to amortization $ 73,400 Intangible assets not subject to amortization: Goodwill $ 70,654 n/a Total intangible assets not subject to amortization $ 70,654 Total intangible assets $ 144,054 Weighted average amortization period 9.6 The intangible assets related to the acquisition consisted of the following: Preliminary Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 38,100 5.0 Customer relationships 12,300 12.0 Sales backlog 2,000 0.3 Trademarks 1,700 0.9 Total intangible assets subject to amortization $ 54,100 Intangible assets not subject to amortization: Goodwill $ 87,853 n/a Total intangible assets not subject to amortization $ 87,853 Total intangible assets $ 141,953 Weighted average amortization period 6.3 years
Schedule of Pro Forma Information	The following table illustrates the unaudited pro forma effect on operating results as if the Thinklogical acquisition had been completed as of January 1, 2016. Three Months Ended Nine Months Ended October 1, 2017 October 1, 2017 (In thousands, except per share data) (Unaudited) Revenues $ 621,745 $ 1,792,614 Net income (loss) attributable to Belden common stockholders (5,128 ) 37,097 Diluted income (loss) per share attributable to Belden common stockholders $ (0.12 ) $ 0.87 The following table illustrates the unaudited pro forma effect on operating results as if the SAM acquisition had been completed as of January 1, 2017. Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands, except per share data) (Unaudited) Revenues $ 659,003 $ 644,017 $ 1,944,628 $ 1,857,885 Net income (loss) attributable to Belden common stockholders 92,769 (24,050 ) 126,937 (19,056 ) Diluted income (loss) per share attributable to Belden common stockholders $ 2.13 $ (0.57 ) $ 3.08 $ (0.45 )

Operating Segments (Tables)

Operating Segments (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Operating Segment Information	Our measure of segment assets does not include cash, goodwill, intangible assets, deferred tax assets, or corporate assets. All goodwill is allocated to reporting units of our segments for purposes of impairment testing. Enterprise Solutions Industrial Solutions Total Segments (In thousands) As of and for the three months ended September 30, 2018 Segment revenues $ 392,080 $ 266,923 $ 659,003 Affiliate revenues 1,776 15 1,791 Segment EBITDA 72,210 53,750 125,960 Depreciation expense 7,092 4,579 11,671 Amortization of intangibles 12,322 13,211 25,533 Amortization of software development intangible assets 620 — 620 Severance, restructuring, and acquisition integration costs 9,528 2,160 11,688 Purchase accounting effects of acquisitions 821 — 821 Deferred revenue adjustments 3,229 — 3,229 Segment assets 766,505 448,626 1,215,131 As of and for the three months ended October 1, 2017 Segment revenues $ 360,842 $ 260,903 $ 621,745 Affiliate revenues 971 2 973 Segment EBITDA 62,109 55,747 117,856 Depreciation expense 6,828 4,855 11,683 Amortization of intangibles 13,920 13,242 27,162 Severance, restructuring, and acquisition integration costs 9,309 7,370 16,679 Purchase accounting effects of acquisitions 2,922 — 2,922 Segment assets 658,175 400,538 1,058,713 As of and for the nine months ended September 30, 2018 Segment revenues $ 1,142,765 $ 795,102 $ 1,937,867 Affiliate revenues 4,318 61 4,379 Segment EBITDA 199,943 153,401 353,344 Depreciation expense 21,465 14,097 35,562 Amortization of intangibles 35,301 39,689 74,990 Amortization of software development intangible assets 1,344 — 1,344 Severance, restructuring, and acquisition integration costs 46,949 10,061 57,010 Purchase accounting effects of acquisitions 2,359 — 2,359 Deferred revenue adjustments 7,889 — 7,889 Segment assets 766,505 448,626 1,215,131 As of and for the nine months ended October 1, 2017 Segment revenues $ 1,023,924 $ 759,835 $ 1,783,759 Affiliate revenues 4,084 51 4,135 Segment EBITDA 168,073 153,675 321,748 Depreciation expense 20,129 14,465 34,594 Amortization of intangibles 38,241 39,703 77,944 Severance, restructuring, and acquisition integration costs 23,701 9,138 32,839 Purchase accounting effects of acquisitions 4,089 — 4,089 Segment assets 658,175 400,538 1,058,713
Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income from Continuing Operations Before Taxes	The following table is a reconciliation of the total of the reportable segments’ Revenues and EBITDA to consolidated revenues and consolidated income before taxes, respectively. Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Total Segment Revenues $ 659,003 $ 621,745 $ 1,937,867 $ 1,783,759 Deferred revenue adjustments (1) (3,229 ) — (7,889 ) — Consolidated Revenues $ 655,774 $ 621,745 $ 1,929,978 $ 1,783,759 Total Segment EBITDA $ 125,960 $ 117,856 $ 353,344 $ 321,748 Gain from patent litigation 62,141 — 62,141 — Costs related to patent litigation (2,634 ) — (2,634 ) — Amortization of intangibles (25,533 ) (27,162 ) (74,990 ) (77,944 ) Severance, restructuring, and acquisition integration costs (2) (11,688 ) (16,679 ) (57,010 ) (32,839 ) Depreciation expense (11,671 ) (11,683 ) (35,562 ) (34,594 ) Deferred revenue adjustments (1) (3,229 ) — (7,889 ) — Purchase accounting effects related to acquisitions (3) (821 ) (2,922 ) (2,359 ) (4,089 ) Amortization of software development intangible assets (620 ) — (1,344 ) — Loss on sale of assets — — (94 ) — Income from equity method investment — 2,551 — 5,835 Eliminations (627 ) (845 ) (1,616 ) (2,628 ) Consolidated operating income 131,278 61,116 231,987 175,489 Interest expense, net (14,472 ) (19,385 ) (46,538 ) (66,424 ) Non-operating pension benefit (cost) 1,356 (325 ) 824 (880 ) Loss on debt extinguishment — (51,594 ) (22,990 ) (52,441 ) Consolidated income (loss) before taxes $ 118,162 $ (10,188 ) $ 163,283 $ 55,744 (1) For the three and nine months ended September 30, 2018 , our segment results include revenues that would have been recorded by acquired businesses had they remained as independent entities. Our consolidated results do not include these revenues due to the purchase accounting effect of recording deferred revenue at fair value. (2) See Note 9, Severance, Restructuring, and Acquisition Integration Activities, for details . (3) For the three and nine months ended September 30, 2018 , we recognized cost of sales for the adjustment of acquired inventory to fair value related to the SAM and NT2 acquisitions.

Income per Share (Tables)

Income per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Basis for Income Per Share Computations	The following table presents the basis for the income per share computations: Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Numerator: Net income $ 85,858 $ 945 $ 117,220 $ 62,417 Less: Net loss attributable to noncontrolling interest (23 ) (82 ) (148 ) (274 ) Less: Preferred stock dividends 8,732 8,732 26,198 26,198 Net income (loss) attributable to Belden common stockholders for basic income (loss) per share $ 77,149 $ (7,705 ) $ 91,170 $ 36,493 Plus: Preferred stock dividends 8,732 — — — Net income (loss) attributable to Belden common stockholders for diluted income (loss) per share $ 85,881 $ (7,705 ) $ 91,170 $ 36,493 Denominator: Weighted average shares outstanding, basic 40,510 42,256 40,960 42,251 Assumed conversion of preferred stock into common stock 6,857 — — — Effect of dilutive common stock equivalents 311 — 308 412 Weighted average shares outstanding, diluted 47,678 42,256 41,268 42,663

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Major Classes of Inventories	The major classes of inventories were as follows: September 30, 2018 December 31, 2017 (In thousands) Raw materials $ 164,925 $ 133,311 Work-in-process 45,054 35,807 Finished goods 142,297 153,377 Gross inventories 352,276 322,495 Excess and obsolete reserves (30,082 ) (25,269 ) Net inventories $ 322,194 $ 297,226

Severance, Restructuring, and_2

Severance, Restructuring, and Acquisition Integration Activities (Tables)	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Severance, Restructuring and Integration Costs by Segment	The following table summarizes the costs by segment of the various programs described above as well as other immaterial programs and acquisition integration activities: Severance Other Restructuring and Integration Costs Total Costs Three Months Ended September 30, 2018 (In thousands) Enterprise Solutions $ (1,283 ) $ 10,811 $ 9,528 Industrial Solutions 136 2,024 2,160 Total $ (1,147 ) $ 12,835 $ 11,688 Three Months Ended October 1, 2017 Enterprise Solutions $ 1,222 $ 8,087 $ 9,309 Industrial Solutions 712 6,658 7,370 Total $ 1,934 $ 14,745 $ 16,679 Nine Months Ended September 30, 2018 Enterprise Solutions $ 10,097 $ 36,852 $ 46,949 Industrial Solutions 378 9,683 10,061 Total $ 10,475 $ 46,535 $ 57,010 Nine Months Ended October 1, 2017 Enterprise Solutions $ 3,398 $ 20,303 $ 23,701 Industrial Solutions 865 8,273 9,138 Total $ 4,263 $ 28,576 $ 32,839 The table below summarizes the significant severance activity that occurred during the year for the Grass Valley and SAM Integration Program described above. The balances are included in accrued liabilities. Grass Valley and SAM Integration Program (In thousands) Balance at December 31, 2017 $ — New charges 456 Cash payments (50 ) Balance at April 1, 2018 $ 406 New charges 10,714 Cash payments (7,556 ) Foreign currency translation (4 ) Balance at July 1, 2018 $ 3,560 New charges 121 Cash payments (989 ) Foreign currency translation (9 ) Other adjustments (1,531 ) Balance at September 30, 2018 $ 1,152

Long-Term Debt and Other Borr_2

Long-Term Debt and Other Borrowing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Carrying Values of Long-Term Debt and Other Borrowing Arrangements	The carrying values of our long-term debt were as follows: September 30, 2018 December 31, 2017 (In thousands) Revolving credit agreement due 2022 $ — $ — Senior subordinated notes: 3.875% Senior subordinated notes due 2028 411,110 — 3.375% Senior subordinated notes due 2027 528,570 540,810 4.125% Senior subordinated notes due 2026 234,920 240,360 2.875% Senior subordinated notes due 2025 352,380 360,540 5.25% Senior subordinated notes due 2024 — 200,000 5.50% Senior subordinated notes due 2023 — 242,522 Total senior subordinated notes 1,526,980 1,584,232 Less unamortized debt issuance costs (23,383 ) (23,484 ) Long-term debt $ 1,503,597 $ 1,560,748

Pension and Other Postretirem_2

Pension and Other Postretirement Obligations (Tables)	9 Months Ended
	Sep. 30, 2018
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Costs	The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: Pension Obligations Other Postretirement Obligations Three Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Service cost $ 1,717 $ 1,206 $ 14 $ 14 Interest cost 2,011 1,822 257 344 Expected return on plan assets (4,660 ) (2,487 ) — — Amortization of prior service credit (37 ) (10 ) — — Actuarial losses 1,073 633 — 23 Net periodic cost $ 104 $ 1,164 $ 271 $ 381 Nine Months Ended Service cost $ 3,792 $ 3,549 $ 40 $ 41 Interest cost 5,792 5,391 781 1,000 Expected return on plan assets (9,688 ) (7,415 ) — — Amortization of prior service credit (59 ) (30 ) — — Actuarial losses 2,350 1,866 — 68 Net periodic cost $ 2,187 $ 3,361 $ 821 $ 1,109

Comprehensive Income and Accu_2

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Total Comprehensive Income (Loss)	The following table summarizes total comprehensive income: Three Months Ended Nine Months Ended September 30, 2018 October 1, 2017 September 30, 2018 October 1, 2017 (In thousands) Net income $ 85,858 $ 945 $ 117,220 $ 62,417 Foreign currency translation gain (loss), net of $0.5 million, $1.1 million, $0.7 million, and $1.5 million tax, respectively (17,904 ) (19,535 ) 10,943 (46,478 ) Adjustments to pension and postretirement liability, net of $0.4 million, $0.2 million, $0.9 million, and $0.7 million tax, respectively 637 397 1,409 1,171 Total comprehensive income (loss) 68,591 (18,193 ) 129,572 17,110 Less: Comprehensive loss attributable to noncontrolling interest (29 ) (66 ) (155 ) (306 ) Comprehensive income (loss) attributable to Belden $ 68,620 $ (18,127 ) $ 129,727 $ 17,416
Components of Other Comprehensive Income (Loss), Net of Tax	The accumulated balances related to each component of other comprehensive income (loss), net of tax, are as follows: Foreign Currency Translation Component Pension and Other Postretirement Benefit Plans Accumulated Other Comprehensive Income (Loss) (In thousands) Balance at December 31, 2017 $ (69,691 ) $ (28,335 ) $ (98,026 ) Other comprehensive income attributable to Belden before reclassifications 10,950 — 10,950 Amounts reclassified from accumulated other comprehensive income — 1,409 1,409 Net current period other comprehensive gain attributable to Belden 10,950 1,409 12,359 Balance at September 30, 2018 $ (58,741 ) $ (26,926 ) $ (85,667 )
Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss)	The following table summarizes the effects of reclassifications from accumulated other comprehensive income (loss) for the nine months ended September 30, 2018 : Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (In thousands) Amortization of pension and other postretirement benefit plan items: Actuarial losses $ 2,350 (1) Prior service credit (59 ) (1) Total before tax 2,291 Tax benefit (882 ) Total net of tax $ 1,409 (1) The amortization of these accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit costs (see Note 13).

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details)	Jul. 19, 2018USD ($)	Jul. 05, 2011patent	Mar. 31, 2018USD ($)	Nov. 30, 2016USD ($)	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)	Sep. 30, 2018USD ($)Segment	Oct. 01, 2017USD ($)	Jan. 01, 2018USD ($)	Dec. 31, 2017USD ($)
Significant Accounting Policies [Line Items]
Number of global business platforms | Segment							2
Number of operating segments | Segment							2
Revenues					$ 655,774,000	$ 621,745,000	$ 1,929,978,000	$ 1,783,759,000
Net income					85,858,000	945,000	117,220,000	62,417,000
Gain from patent litigation					62,141,000	0	62,141,000	0
Increase (decrease) in retained earnings					889,189,000		889,189,000			$ 833,610,000
Other current assets					(50,361,000)		(50,361,000)			(40,167,000)
Other long-lived assets					(31,062,000)		(31,062,000)			(65,207,000)
Deferred income taxes					63,853,000		63,853,000			$ 42,549,000
Operating income					131,278,000	61,116,000	231,987,000	175,489,000
Accounting Standards Update 2014-09
Significant Accounting Policies [Line Items]
Revenues					0		0
Increase (decrease) in retained earnings									$ 2,600,000
Accounting Standards Update 2016-16
Significant Accounting Policies [Line Items]
Increase (decrease) in retained earnings									(31,700,000)
Other current assets									3,000,000
Other long-lived assets									46,900,000
Deferred income taxes									$ 18,200,000
Accounting Standards Update 2017-07
Significant Accounting Policies [Line Items]
Operating income						$ 300,000		$ 900,000
PPC | Corning
Significant Accounting Policies [Line Items]
Gain contingency, number of patents allegedly infringed upon | patent		2
Litigation settlement amount			$ 61,800,000	$ 61,300,000
Proceeds from settlement	$ 62,100,000
Enhanced Damages Awarded			$ 23,850,000
Standby Letters of Credit
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued					7,300,000		7,300,000
Bank Guaranties
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued					3,200,000		3,200,000
Surety Bonds
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued					2,300,000		2,300,000
Immaterial Overstatement In Prior Period
Significant Accounting Policies [Line Items]
Revenues					11,800,000		28,300,000
Net income					$ 2,600,000		$ 6,900,000

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Jan. 01, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Increase (decrease) in retained earnings	$ 889,189,000		$ 889,189,000			$ 833,610,000
Decrease in revenues	(655,774,000)	$ (621,745,000)	(1,929,978,000)	$ (1,783,759,000)
Accrued rebates	30,100,000		30,100,000
Accrued returns	9,300,000		9,300,000
Estimated price adjustments, accounts receivable			29,000,000
Contract with customer, deferred revenues	90,800,000		90,800,000		$ 104,400,000
Contract with customer, deferred revenues, current	78,500,000		78,500,000
Contract with customer, deferred revenues, noncurrent	12,300,000		12,300,000
Contract with customer, revenue recognized	50,800,000		149,400,000
Deferred sales commission	2,300,000		2,300,000
Sales commissions	5,900,000		18,400,000
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Increase (decrease) in retained earnings					$ 2,600,000
Decrease in revenues	$ 0		$ 0

Revenues - Major Product Catego

Revenues - Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 655,774	$ 621,745	$ 1,929,978	$ 1,783,759
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	388,851	360,842	1,134,876	1,023,924
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	266,923	260,903	795,102	759,835
Cable & Connectivity
Disaggregation of Revenue [Line Items]
Revenues	434,388	422,732	1,284,032	1,217,614
Cable & Connectivity | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	271,928	262,212	785,970	751,459
Cable & Connectivity | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	162,460	160,520	498,062	466,155
Networking, Software & Security
Disaggregation of Revenue [Line Items]
Revenues	221,386	199,013	645,946	566,145
Networking, Software & Security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	116,923	98,630	348,906	272,465
Networking, Software & Security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 104,463	$ 100,383	$ 297,040	$ 293,680

Revenues - Location of Customer

Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 655,774	$ 621,745	$ 1,929,978	$ 1,783,759
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	388,851	360,842	1,134,876	1,023,924
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	266,923	260,903	795,102	759,835
Americas
Disaggregation of Revenue [Line Items]
Revenues	410,654	393,452	1,197,461	1,139,243
Americas | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	254,320	243,223	735,794	690,568
Americas | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	156,334	150,229	461,667	448,675
EMEA
Disaggregation of Revenue [Line Items]
Revenues	143,747	133,988	446,245	373,997
EMEA | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	72,467	61,270	228,394	168,947
EMEA | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	71,280	72,718	217,851	205,050
APAC
Disaggregation of Revenue [Line Items]
Revenues	101,373	94,305	286,272	270,519
APAC | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	62,064	56,349	170,688	164,409
APAC | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 39,309	$ 37,956	$ 115,584	$ 106,110

Revenues - Products and Service

Revenues - Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 655,774	$ 621,745	$ 1,929,978	$ 1,783,759
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	388,851	360,842	1,134,876	1,023,924
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	266,923	260,903	795,102	759,835
Products
Disaggregation of Revenue [Line Items]
Revenues	611,967	577,594	1,804,202	1,651,976
Products | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	368,389	342,216	1,080,549	968,855
Products | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	243,578	235,378	723,653	683,121
Support & Services
Disaggregation of Revenue [Line Items]
Revenues	43,807	44,151	125,776	131,783
Support & Services | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	20,462	18,626	54,327	55,069
Support & Services | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 23,345	$ 25,525	$ 71,449	$ 76,714

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($)	Apr. 25, 2018	Feb. 08, 2018	May 31, 2017	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs				$ 11,688,000	$ 16,679,000	$ 57,010,000	$ 32,839,000
Amortization of intangibles				25,533,000	27,162,000	74,990,000	77,944,000
Net-Tech Technology, Inc.
Business Acquisition [Line Items]
Percentage of outstanding shares acquired	100.00%
Acquisition price	$ 8,500,000
Snell Advanced Media
Business Acquisition [Line Items]
Percentage of outstanding shares acquired		100.00%
Acquisition price		$ 104,500,000
Maximum earnout consideration		31,400,000
Estimated earnout consideration		29,300,000
Long-term debt		19,315,000
Receivables		17,182,000
Tax basis in acquired goodwill		$ 0
Revenue of acquiree				25,300,000		77,200,000
Severance, restructuring, and acquisition integration costs				7,100,000		36,600,000
Amortization of intangibles				3,700,000		8,700,000
Inventory adjustment				600,000		1,800,000
Snell Advanced Media | Acquisition-related Costs
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs					7,100,000		36,600,000
Amortization of intangibles					200,000		2,000,000
Inventory adjustment					$ 200,000		$ 1,700,000
Thinklogical Holdings LLC
Business Acquisition [Line Items]
Percentage of outstanding shares acquired		100.00%
Acquisition price			$ 165,800,000
Receivables			4,355,000
Tax basis in acquired goodwill			$ 43,300,000
Revenue of acquiree				15,200,000		32,600,000
Loss before taxes of acquiree				(2,600,000)		500,000
Severance, restructuring, and acquisition integration costs						500,000
Amortization of intangibles				$ 3,200,000		$ 9,500,000
Business acquisition, goodwill, tax deductible period						15 years

Acquisitions - Schedule of Reco

Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Feb. 08, 2018	Dec. 31, 2017	May 31, 2017
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Goodwill	$ 1,554,830		$ 1,478,257
Snell Advanced Media
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Receivables		$ 17,182
Inventory		15,312
Prepaid and other current assets		3,375
Property, plant, and equipment		7,789
Intangible assets		54,100
Goodwill		87,853
Deferred taxes		5,476
Other long-lived assets		2,156
Total assets acquired		193,243
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable		11,927
Accrued liabilities		21,614
Deferred revenue		3,924
Long-term debt		19,315
Postretirement benefits		31,343
Other long-term liabilities		591
Total liabilities assumed		88,714
Net assets		$ 104,529
Thinklogical Holdings LLC
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Receivables				$ 4,355
Inventory				16,424
Prepaid and other current assets				320
Property, plant, and equipment				4,289
Intangible assets				73,400
Goodwill				70,654
Deferred income taxes				598
Total assets acquired				170,040
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable				1,231
Accrued liabilities				1,353
Deferred revenue				1,702
Total liabilities assumed				4,286
Net assets				$ 165,754

Acquisitions - Schedule of Acqu

Acquisitions - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Feb. 08, 2018	May 31, 2017
Snell Advanced Media
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 54,100
Total intangible assets not subject to amortization	87,853
Total intangible assets	$ 141,953
Amortization Period	6 years 3 months 20 days
Snell Advanced Media | Goodwill
Business Acquisition [Line Items]
Total intangible assets not subject to amortization	$ 87,853
Snell Advanced Media | Developed technologies
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 38,100
Amortization Period	5 years
Snell Advanced Media | Customer relationships
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 12,300
Amortization Period	12 years
Snell Advanced Media | Sales backlog
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 2,000
Amortization Period	3 months 18 days
Snell Advanced Media | Trademarks
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 1,700
Amortization Period	11 months
Thinklogical Holdings LLC
Business Acquisition [Line Items]
Total intangible assets subject to amortization		$ 73,400
Total intangible assets not subject to amortization		70,654
Total intangible assets		$ 144,054
Amortization Period		9 years 7 months 6 days
Thinklogical Holdings LLC | Goodwill
Business Acquisition [Line Items]
Total intangible assets not subject to amortization		$ 70,654
Thinklogical Holdings LLC | Developed technologies
Business Acquisition [Line Items]
Total intangible assets subject to amortization		$ 62,600
Amortization Period		10 years
Thinklogical Holdings LLC | Customer relationships
Business Acquisition [Line Items]
Total intangible assets subject to amortization		$ 6,500
Amortization Period		8 years
Thinklogical Holdings LLC | Sales backlog
Business Acquisition [Line Items]
Total intangible assets subject to amortization		$ 1,400
Amortization Period		3 months 19 days
Thinklogical Holdings LLC | Trademarks
Business Acquisition [Line Items]
Total intangible assets subject to amortization		$ 2,900
Amortization Period		10 years

Acquisitions - Schedule of Pro

Acquisitions - Schedule of Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Snell Advanced Media
Business Acquisition [Line Items]
Revenues	$ 659,003	$ 644,017	$ 1,944,628	$ 1,857,885
Net income (loss) attributable to Belden common stockholders	$ 92,769	$ (24,050)	$ 126,937	$ (19,056)
Diluted income (loss) per share attributable to Belden common stockholders (in usd per share)	$ 2.13	$ (0.57)	$ 3.08	$ (0.45)
Thinklogical Holdings LLC
Business Acquisition [Line Items]
Revenues		$ 621,745		$ 1,792,614
Net income (loss) attributable to Belden common stockholders		$ (5,128)		$ 37,097
Diluted income (loss) per share attributable to Belden common stockholders (in usd per share)		$ (0.12)		$ 0.87

Disposals - Narrative (Details)

Disposals - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Hirschmann Jv | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition, sales price		$ 40.2
Previously Closed Operating Facility | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition, sales price	$ 1.5
Gain on disposal	$ 0.6

Operating Segments - Additional

Operating Segments - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018Segment
Segment Reporting [Abstract]
Number of global business platforms	2

Operating Segments - Operating

Operating Segments - Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Depreciation expense	$ 11,700	$ 11,700	$ 35,600	$ 34,600
Amortization of intangibles	25,533	27,162	74,990	77,944
Severance, restructuring, and acquisition integration costs	11,688	16,679	57,010	32,839
Segment assets	3,714,912		3,714,912		$ 3,840,613
Enterprise Solutions
Segment Reporting Information [Line Items]
Severance, restructuring, and acquisition integration costs	9,528	9,309	46,949	23,701
Industrial Solutions
Segment Reporting Information [Line Items]
Severance, restructuring, and acquisition integration costs	2,160	7,370	10,061	9,138
Reportable Segment
Segment Reporting Information [Line Items]
Segment revenues	659,003	621,745	1,937,867	1,783,759
Affiliate revenues	1,791	973	4,379	4,135
Segment EBITDA	125,960	117,856	353,344	321,748
Depreciation expense	11,671	11,683	35,562	34,594
Amortization of intangibles	25,533	27,162	74,990	77,944
Amortization of software development intangible assets	620	0	1,344	0
Severance, restructuring, and acquisition integration costs	11,688	16,679	57,010	32,839
Purchase accounting effects of acquisitions	821	2,922	2,359	4,089
Deferred revenue adjustments	3,229	0	7,889	0
Segment assets	1,215,131	1,058,713	1,215,131	1,058,713
Reportable Segment | Enterprise Solutions
Segment Reporting Information [Line Items]
Segment revenues	392,080	360,842	1,142,765	1,023,924
Affiliate revenues	1,776	971	4,318	4,084
Segment EBITDA	72,210	62,109	199,943	168,073
Depreciation expense	7,092	6,828	21,465	20,129
Amortization of intangibles	12,322	13,920	35,301	38,241
Amortization of software development intangible assets	620		1,344
Severance, restructuring, and acquisition integration costs	9,528	9,309	46,949	23,701
Purchase accounting effects of acquisitions	821	2,922	2,359	4,089
Deferred revenue adjustments	3,229		7,889
Segment assets	766,505	658,175	766,505	658,175
Reportable Segment | Industrial Solutions
Segment Reporting Information [Line Items]
Segment revenues	266,923	260,903	795,102	759,835
Affiliate revenues	15	2	61	51
Segment EBITDA	53,750	55,747	153,401	153,675
Depreciation expense	4,579	4,855	14,097	14,465
Amortization of intangibles	13,211	13,242	39,689	39,703
Amortization of software development intangible assets	0		0
Severance, restructuring, and acquisition integration costs	2,160	7,370	10,061	9,138
Purchase accounting effects of acquisitions	0	0	0	0
Deferred revenue adjustments	0		0
Segment assets	$ 448,626	$ 400,538	$ 448,626	$ 400,538

Operating Segments - Reconcilia

Operating Segments - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income from Continuing Operations Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Revenues	$ 655,774	$ 621,745	$ 1,929,978	$ 1,783,759
Gain from patent litigation	(62,141)	0	(62,141)	0
Amortization of intangibles	(25,533)	(27,162)	(74,990)	(77,944)
Severance, restructuring, and acquisition integration costs	(11,688)	(16,679)	(57,010)	(32,839)
Depreciation expense	(11,700)	(11,700)	(35,600)	(34,600)
Operating income	131,278	61,116	231,987	175,489
Interest expense, net	(14,472)	(19,385)	(46,538)	(66,424)
Non-operating pension benefit (cost)	1,356	(325)	824	(880)
Loss on debt extinguishment	0	(51,594)	(22,990)	(52,441)
Income before taxes	118,162	(10,188)	163,283	55,744
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Revenues	659,003	621,745	1,937,867	1,783,759
Deferred revenue adjustments	(3,229)	0	(7,889)	0
Consolidated Revenues	655,774	621,745	1,929,978	1,783,759
Total Segment EBITDA	125,960	117,856	353,344	321,748
Gain from patent litigation	62,141	0	62,141	0
Costs related to patent litigation	(2,634)	0	(2,634)	0
Amortization of intangibles	(25,533)	(27,162)	(74,990)	(77,944)
Severance, restructuring, and acquisition integration costs	(11,688)	(16,679)	(57,010)	(32,839)
Depreciation expense	(11,671)	(11,683)	(35,562)	(34,594)
Purchase accounting effects related to acquisitions	(821)	(2,922)	(2,359)	(4,089)
Amortization of software development intangible assets	(620)	0	(1,344)	0
Loss on sale of assets	0	0	(94)	0
Income from equity method investment	0	2,551	0	5,835
Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (627)	$ (845)	$ (1,616)	$ (2,628)

Income Per Share - Basis for In

Income Per Share - Basis for Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Numerator:
Net income	$ 85,858	$ 945	$ 117,220	$ 62,417
Less: Net loss attributable to noncontrolling interest	(23)	(82)	(148)	(274)
Less: Preferred stock dividends	8,732	8,732	26,198	26,198
Net income (loss) attributable to Belden common stockholders	77,149	(7,705)	91,170	36,493
Plus: Preferred stock dividends	8,732	0	0	0
Net income (loss) attributable to Belden common stockholders for diluted income (loss) per share	$ 85,881	$ (7,705)	$ 91,170	$ 36,493
Denominator:
Weighted average shares outstanding, basic (in shares)	40,510	42,256	40,960	42,251
Assumed conversion of preferred stock into common stock (in shares)	6,857	0	0	0
Effect of dilutive common stock equivalents (in shares)	311	0	308	412
Weighted average shares outstanding, diluted (in shares)	47,678	42,256	41,268	42,663

Income Per Share - Additional I

Income Per Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from diluted weighted average shares outstanding (in shares)	900	900	800	500
Anti-dilutive shares excluded from diluted weighted average shares outstanding due to performance conditions not being met (in shares)	300	200	200	200
Weighted Average Number Diluted Shares Outstanding Adjustment	311	0	308	412
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from diluted weighted average shares outstanding (in shares)		6,800	6,900	6,900

Inventories - Major Classes of

Inventories - Major Classes of Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 164,925	$ 133,311
Work-in-process	45,054	35,807
Finished goods	142,297	153,377
Gross inventories	352,276	322,495
Excess and obsolete reserves	(30,082)	(25,269)
Net inventories	$ 322,194	$ 297,226

Long-Lived Assets - Additional

Long-Lived Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 11.7	$ 11.7	$ 35.6	$ 34.6
Amortization of intangible assets	$ 26.2	$ 27.2	$ 76.3	$ 77.9

Severance, Restructuring and Ac

Severance, Restructuring and Acquisition Integration Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		28 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 11,688	$ 16,679	$ 57,010	$ 32,839
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and integration cost payable period			60 days
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	4,800	12,400	$ 21,400	26,500
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	6,400	4,200	30,300	6,200
Research and Development
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	500	100	5,300	100
Grass Valley And SAM Integration Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	7,100		36,600
Additional severance and restructuring costs	12,000		12,000		$ 12,000
Industrial Manufacturing Footprint Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 4,300	$ 11,400	$ 15,800	$ 25,300	$ 64,100

Severance, Restructuring and _2

Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 11,688	$ 16,679	$ 57,010	$ 32,839
Enterprise Solutions
Restructuring Cost and Reserve [Line Items]
Total Costs	9,528	9,309	46,949	23,701
Industrial Solutions
Restructuring Cost and Reserve [Line Items]
Total Costs	2,160	7,370	10,061	9,138
Employee Severance
Restructuring Cost and Reserve [Line Items]
Severance Costs	(1,147)	1,934	10,475	4,263
Employee Severance | Enterprise Solutions
Restructuring Cost and Reserve [Line Items]
Severance Costs	(1,283)	1,222	10,097	3,398
Employee Severance | Industrial Solutions
Restructuring Cost and Reserve [Line Items]
Severance Costs	136	712	378	865
Other Than Severance Costs Restructuring And Integration Costs
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	12,835	14,745	46,535	28,576
Other Than Severance Costs Restructuring And Integration Costs | Enterprise Solutions
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	10,811	8,087	36,852	20,303
Other Than Severance Costs Restructuring And Integration Costs | Industrial Solutions
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	$ 2,024	$ 6,658	$ 9,683	$ 8,273

Severance, Restructuring, and_3

Severance, Restructuring, and Acquisition Integration Activities Severance, Restructuring and Acquisition Integration Activities - Accrued Severance (Details) - Employee Severance - Enterprise Solutions - Grass Valley And SAM Integration Program - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 3,560	$ 406	$ 0
New charges	121	10,714	456
Cash payments	(989)	(7,556)	(50)
Foreign currency translation	(9)	(4)
Other adjustments	(1,531)
Balance, end of period	$ 1,152	$ 3,560	$ 406

Long-Term Debt and Other Borr_3

Long-Term Debt and Other Borrowing Arrangements - Carrying Values of Long-Term Debt and Other Borrowing Arrangements (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total senior subordinated notes	$ 1,526,980,000	$ 1,584,232,000
Less unamortized debt issuance costs	(23,383,000)	(23,484,000)
Long-term debt	1,503,597,000	1,560,748,000
Revolving credit agreement due 2022
Debt Instrument [Line Items]
Revolving credit agreement due 2022	0	0
3.875% Senior subordinated notes due 2028
Debt Instrument [Line Items]
Total senior subordinated notes	$ 411,110,000	$ 0
Senior subordinated notes interest rate	3.875%	3.875%
3.375% Senior subordinated notes due 2027
Debt Instrument [Line Items]
Total senior subordinated notes	$ 528,570,000	$ 540,810,000
Senior subordinated notes interest rate	3.375%	3.375%
4.125% Senior subordinated notes due 2026
Debt Instrument [Line Items]
Total senior subordinated notes	$ 234,920,000	$ 240,360,000
Senior subordinated notes interest rate	4.125%	4.125%
2.875% Senior subordinated notes due 2025
Debt Instrument [Line Items]
Total senior subordinated notes	$ 352,380,000	$ 360,540,000
Senior subordinated notes interest rate	2.875%	2.875%
5.25% Senior subordinated notes due 2024
Debt Instrument [Line Items]
Total senior subordinated notes	$ 0	$ 200,000,000
Senior subordinated notes interest rate	5.25%	5.25%
5.50% Senior subordinated notes due 2023
Debt Instrument [Line Items]
Total senior subordinated notes	$ 0	$ 242,522,000
Senior subordinated notes interest rate	5.50%	5.50%

Long-Term Debt and Other Borr_4

Long-Term Debt and Other Borrowing Arrangements - Additional Information (Details)	May 16, 2017USD ($)	Apr. 30, 2018USD ($)	Apr. 30, 2018EUR (€)	Mar. 31, 2018USD ($)	Mar. 31, 2018EUR (€)	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)	Sep. 30, 2018EUR (€)	Mar. 31, 2018EUR (€)	Feb. 28, 2018USD ($)	Feb. 28, 2018EUR (€)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Senior subordinated notes						$ 1,526,980,000		$ 1,526,980,000						$ 1,584,232,000
Loss on debt extinguishment						0	$ 51,594,000	22,990,000	$ 52,441,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Fair value of debt instrument						1,526,900,000		1,526,900,000
Revolving credit agreement due 2022
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 400,000,000
Commitment fee percentage	0.25%
Fixed charge coverage, minimum threshold (as a percent)	90.00%
Borrowings outstanding						0		0						$ 0
Available borrowing capacity						$ 359,800,000		$ 359,800,000
Revolving credit agreement due 2022 | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	1.25%
Revolving credit agreement due 2022 | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	1.75%
3.875% Senior subordinated notes due 2028
Debt Instrument [Line Items]
Senior subordinated notes interest rate						3.875%		3.875%		3.875%				3.875%
Senior subordinated notes						$ 411,110,000		$ 411,110,000						$ 0
3.875% Senior subordinated notes due 2028 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes				$ 431,300,000							€ 350,000,000
Senior subordinated notes interest rate				3.875%							3.875%
Fees incurred to creditors and third parties				$ 7,500,000
3.375% Senior subordinated notes due 2027
Debt Instrument [Line Items]
Senior subordinated notes interest rate						3.375%		3.375%		3.375%				3.375%
Senior subordinated notes						$ 528,570,000		$ 528,570,000						$ 540,810,000
3.375% Senior subordinated notes due 2027 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €										€ 450,000,000
Senior subordinated notes interest rate						3.375%		3.375%		3.375%
4.125% Senior subordinated notes due 2026
Debt Instrument [Line Items]
Senior subordinated notes interest rate						4.125%		4.125%		4.125%				4.125%
Senior subordinated notes						$ 234,920,000		$ 234,920,000						$ 240,360,000
4.125% Senior subordinated notes due 2026 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €										€ 200,000,000
2.875% Senior subordinated notes due 2025
Debt Instrument [Line Items]
Senior subordinated notes interest rate						2.875%		2.875%		2.875%				2.875%
Senior subordinated notes						$ 352,380,000		$ 352,380,000						$ 360,540,000
2.875% Senior subordinated notes due 2025 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €										€ 300,000,000
Senior subordinated notes interest rate						2.875%		2.875%		2.875%
Fair value of debt instrument						$ 352,400,000		$ 352,400,000
5.25% Senior subordinated notes due 2024
Debt Instrument [Line Items]
Senior subordinated notes interest rate						5.25%		5.25%		5.25%				5.25%
Senior subordinated notes						$ 0		$ 0						$ 200,000,000
5.25% Senior subordinated notes due 2024 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes												$ 200,000,000
Senior subordinated notes interest rate						5.25%		5.25%		5.25%
Debt repurchased				188,700,000
Repayments of debt		$ 11,900,000		199,800,000
Loss on debt extinguishment		800,000		13,800,000
5.50% Senior subordinated notes due 2023
Debt Instrument [Line Items]
Senior subordinated notes interest rate						5.50%		5.50%		5.50%				5.50%
Senior subordinated notes						$ 0		$ 0						$ 242,522,000
5.50% Senior subordinated notes due 2023 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €													€ 200,000,000
Senior subordinated notes interest rate						5.50%		5.50%		5.50%
Debt repurchased | €											€ 143,100,000
Repayments of debt		71,600,000	€ 58,500,000	182,100,000	€ 147,800,000
Loss on debt extinguishment		$ 2,200,000		$ 6,200,000

Net Investment Hedge (Details)

Net Investment Hedge (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign currency translation adjustment	$ (17,904)	$ (19,535)	$ 10,943	$ (46,478)
Senior Subordinate Notes
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign currency translation adjustment			$ 46,300
Senior Subordinate Notes | 4.125% Senior subordinated notes due 2026
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign currency translation adjustment				$ 25,300

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Operating Loss Carryforwards [Line Items]
Income tax (benefit) expense	$ 32,304	$ (11,133)	$ 46,063	$ (6,673)
Effective tax rate	27.30%	109.30%	28.20%	(12.00%)
Recognition of unrecognized tax benefit resulting from prior uncertain tax positions			$ 1,200
Income tax expense related to debt refinance			1,800
Tax Cuts and Jobs Act of 2017, income tax expense	$ 3,800		4,300
Income tax benefit from implementing a foreign tax credit planning strategy	$ 3,300	$ 2,500	$ 4,400	$ 8,400
Foreign tax expense recognized		1,400		$ 8,400
Federal statutory income tax rate (as a percent)				35.00%
Income tax benefit from non-taxable currency translation gains		6,400		$ 11,700
Effective rate impact, other		$ 2,600		$ 2,300
GERMANY
Operating Loss Carryforwards [Line Items]
Federal statutory income tax rate (as a percent)				28.00%
CANADA
Operating Loss Carryforwards [Line Items]
Federal statutory income tax rate (as a percent)				26.00%
NETHERLANDS
Operating Loss Carryforwards [Line Items]
Federal statutory income tax rate (as a percent)				25.00%

Pension and Other Postretirem_3

Pension and Other Postretirement Obligations - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Pension Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,717	$ 1,206	$ 3,792	$ 3,549
Interest cost	2,011	1,822	5,792	5,391
Expected return on plan assets	(4,660)	(2,487)	(9,688)	(7,415)
Amortization of prior service credit	(37)	(10)	(59)	(30)
Actuarial losses	1,073	633	2,350	1,866
Net periodic cost	104	1,164	2,187	3,361
Other Postretirement Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	14	40	41
Interest cost	257	344	781	1,000
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	0	0	0	0
Actuarial losses	0	23	0	68
Net periodic cost	$ 271	$ 381	$ 821	$ 1,109

Comprehensive Income and Accu_3

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Total Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Equity [Abstract]
Net income	$ 85,858	$ 945	$ 117,220	$ 62,417
Foreign currency translation gain (loss), net of $0.5 million, $1.1 million, $0.7 million, and $1.5 million tax, respectively	(17,904)	(19,535)	10,943	(46,478)
Adjustments to pension and postretirement liability, net of $0.4 million, $0.2 million, $0.9 million, and $0.7 million tax, respectively	637	397	1,409	1,171
Total comprehensive income (loss)	68,591	(18,193)	129,572	17,110
Less: Comprehensive loss attributable to noncontrolling interest	(29)	(66)	(155)	(306)
Comprehensive income (loss) attributable to Belden	68,620	(18,127)	129,727	17,416
Foreign currency translation, tax income (loss)	500	1,100	700	1,500
Adjustments to pension and postretirement liability, tax	$ 400	$ 200	$ 900	$ 700

Comprehensive Income and Accu_4

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss), Net of Tax (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 1,434,866
Other comprehensive loss, net of tax	12,352
Ending balance	1,390,302
Foreign Currency Translation Component
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(69,691)
Other comprehensive income attributable to Belden before reclassifications	10,950
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive loss, net of tax	10,950
Ending balance	(58,741)
Pension and Other Postretirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(28,335)
Other comprehensive income attributable to Belden before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	1,409
Other comprehensive loss, net of tax	1,409
Ending balance	(26,926)
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(98,026)
Other comprehensive income attributable to Belden before reclassifications	10,950
Amounts reclassified from accumulated other comprehensive income	1,409
Other comprehensive loss, net of tax	12,359
Ending balance	$ (85,667)

Comprehensive Income and Accu_5

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Pension and Other Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net of tax	$ (1,409)
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,350
Reclassification out of Accumulated Other Comprehensive Income | Prior service credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(59)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,291
Tax benefit	(882)
Total net of tax	$ 1,409

Preferred Stock (Details)

Preferred Stock (Details) $ / shares in Units, $ in Thousands	Jul. 15, 2019shares	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)	Dec. 31, 2016USD ($)trading_day$ / sharesshares
Class of Stock [Line Items]
Preferred stock dividends | $		$ 8,732	$ 8,732	$ 26,198	$ 26,198
Depository Shares
Class of Stock [Line Items]
Depository shares issued (in shares)						5,200,000
Interest in preferred stock per depository share						0.01
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock
Class of Stock [Line Items]
Percentage of issued shares						6.75%
Offering price per share (in usd per share) | $ / shares						$ 100
Threshold trading day period | trading_day						20
Proceeds from offering, net | $						$ 501,000
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock | Scenario, Forecast | Minimum
Class of Stock [Line Items]
Preferred stock converted in to common stock (in shares)	120.46
Number of common stock issued upon conversion (in shares)	6,200,000
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock | Scenario, Forecast | Maximum
Class of Stock [Line Items]
Preferred stock converted in to common stock (in shares)	132.50
Number of common stock issued upon conversion (in shares)	6,900,000

Share Repurchases (Details)

Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	May 25, 2017
Text Block [Abstract]
Number of shares authorized for repurchase under the share repurchase program			$ 200,000,000
Shares repurchased	0.3	1.8
Value of shares repurchased	$ 25,000,000	$ 125,000,000
Treasury stock acquired, average cost per share (in usd per share)	$ 72.62	$ 70.13