LKQ (LKQ) 10-Q 6 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 24, 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	LKQ
Entity Registrant Name	LKQ CORP
Entity Central Index Key	1,065,696
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		318,202,654

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
Income Statement [Abstract]
Revenue		$ 3,122,378	$ 2,465,800		$ 8,873,893		$ 7,267,054
Cost of goods sold		1,925,180	1,508,924		5,460,845		4,415,076
Gross margin		1,197,198	956,876		3,413,048		2,851,978
Selling, general and administrative expenses (1)		879,150	695,978	[1]	2,472,085	[1]	2,003,065	[1]
Restructuring and acquisition related expenses		6,614	4,922		26,546		10,371
Depreciation and amortization		76,701	56,877		196,322		159,178
Operating income		234,733	199,099		718,095		679,364
Other expense (income):
Interest expense, net		40,860	25,222		107,647		73,806
Gains on bargain purchases			(913)		(328)		(3,990)
Other income, net		(6,959)	(3,107)		(9,086)		(6,884)
Total other expense, net		33,901	21,202		98,233		62,932
Income from continuing operations before provision for income taxes		200,832	177,897		619,862		616,432
Provision for income taxes		46,068	58,189		156,427		206,206
Equity in (losses) earnings of unconsolidated subsidiaries		(20,284)	2,673		(18,326)		3,878
Income from continuing operations		134,480	122,381		445,109		414,104
Net loss from discontinued operations							(4,531)
Net income		134,480	122,381		445,109		409,573
Less: net income attributable to noncontrolling interest		378			1,040
Net income attributable to LKQ stockholders		$ 134,102	$ 122,381		$ 444,069		$ 409,573
Basic earnings per share: (2)
Income from continuing operations		$ 0.42	$ 0.40		$ 1.42		$ 1.34
Net loss from discontinued operations							(0.01)
Net income		0.42	0.40		1.42		1.33
Less: net income attributable to noncontrolling interest		0			0
Net income attributable to LKQ stockholders	[2]	0.42	0.40		1.42		1.33
Diluted earnings per share: (2)
Income from continuing operations		0.42	0.39		1.41		1.33
Net loss from discontinued operations							(0.01)
Net income		0.42	0.39		1.41		1.32
Net income attributable to Noncontrolling Interest Per Share, Diluted		0			0
Net income attributable to LKQ stockholders	[2]	$ 0.42	$ 0.39		$ 1.41		$ 1.32
[1]	(1) Selling, general and administrative expenses contain facility and warehouses expenses and distribution expenses that were previously shown separately.
[2]	(2) The sum of the individual earnings per share amounts may not equal the total due to rounding.

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 134,480	$ 122,381	$ 445,109	$ 409,573
Less: net income attributable to noncontrolling interest	378		1,040
Net income attributable to LKQ stockholders	134,102	122,381	444,069	409,573
Other comprehensive income (loss):
Foreign currency translation, net of tax	(20,951)	59,618	(77,630)	174,794
Net change in unrealized gains/losses on cash flow hedges, net of tax	304	(1,776)	5,964	457
Net change in unrealized gains/losses on pension plans, net of tax	(1,274)	(150)	154	4,053
Net change in other comprehensive income (loss) from unconsolidated subsidiaries	643	(1,034)	2,160	(1,635)
Other comprehensive (loss) income	(18,730)	56,658	(69,660)	169,563
Comprehensive income	115,750	179,039	375,449	579,136
Less: comprehensive income attributable to noncontrolling interest	378		1,040
Comprehensive income attributable to LKQ stockholders	$ 115,372	$ 179,039	$ 374,409	$ 579,136

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 341,346	$ 279,766
Receivables, net	1,255,876	1,027,106
Inventories	2,794,894	2,380,783
Prepaid expenses and other current assets	200,944	134,479
Total current assets	4,593,060	3,822,134
Property, plant and equipment, net	1,201,003	913,089
Intangible assets:
Goodwill	4,475,266	3,536,511
Other intangibles, net	953,372	743,769
Equity method investments	157,409	208,404
Other assets	205,226	142,965
Total assets	11,585,336	9,366,872
Current liabilities:
Accounts payable	941,747	788,613
Accrued expenses:
Accrued payroll-related liabilities	153,536	143,424
Other accrued expenses	358,212	218,600
Refund liability	106,732
Other current liabilities	57,088	45,727
Current portion of long-term obligations	118,365	126,360
Total current liabilities	1,735,680	1,322,724
Long-term obligations, excluding current portion	4,250,137	3,277,620
Deferred income taxes	325,537	252,359
Other noncurrent liabilities	376,566	307,516
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value, 1,000,000,000 shares authorized, 318,197,309 and 309,126,386 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	3,182	3,091
Additional paid-in capital	1,409,242	1,141,451
Retained earnings	3,562,827	3,124,103
Accumulated other comprehensive loss	(134,791)	(70,476)
Total Company stockholders' equity	4,840,460	4,198,169
Noncontrolling interest	56,956	8,484
Total stockholders' equity	4,897,416	4,206,653
Total liabilities and stockholders’ equity	$ 11,585,336	$ 9,366,872

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	318,197,309	309,126,386
Common stock, shares outstanding	318,197,309	309,126,386

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 445,109	$ 409,573
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	210,977	166,508
Impairment on Mekonomen equity method investment	22,715
Stock-based compensation expense	17,544	17,582
Loss on sale of business		8,580
Other	(7,187)	(11,982)
Changes in operating assets and liabilities, net of effects from acquisitions and dispositions:
Receivables, net	(70,797)	(75,444)
Inventories	(71,058)	(97,584)
Prepaid income taxes/income taxes payable	7,262	(928)
Accounts payable	(71,997)	42,175
Other operating assets and liabilities	38,599	(9,237)
Net cash provided by operating activities	521,167	449,243
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(171,763)	(135,537)
Acquisitions, net of cash acquired	(1,206,067)	(252,667)
Proceeds from disposals of business/investment	0	301,297
Investments in unconsolidated subsidiaries	(11,066)	(7,114)
Receipts of deferred purchase price on receivables under factoring arrangements	9,410	0
Other investing activities, net	7,970	9,864
Net cash used in investing activities	(1,371,516)	(84,157)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	3,772	6,465
Taxes paid related to net share settlements of stock-based compensation awards	(4,768)	(5,095)
Debt issuance costs	(16,938)
Proceeds from issuance of Euro Notes (2026/28)	1,232,100
Borrowings under revolving credit facilities	1,025,496	424,976
Repayments under revolving credit facilities	(1,110,035)	(770,884)
Repayments under term loans	(114,800)	(27,884)
Borrowings under receivables securitization facility		8,525
Repayments under receivables securitization facility		(9,925)
(Repayments) borrowings of other debt, net	(38,695)	24,522
Payments of other obligations		(2,079)
Other financing activities, net	3,182	4,316
Net cash provided by (used in) financing activities	979,314	(347,063)
Effect of exchange rate changes on cash and cash equivalents	(67,385)	22,538
Net increase in cash and cash equivalents	61,580	40,561
Cash and cash equivalents of continuing operations, beginning of period	279,766	227,400
Add: Cash and cash equivalents of discontinued operations, beginning of period		7,116
Cash and cash equivalents of continuing and discontinued operations, beginning of period	279,766	234,516
Cash and cash equivalents, end of period	341,346	275,077
Supplemental disclosure of cash paid for:
Income taxes, net of refunds	158,740	218,332
Interest	74,417	57,519
Supplemental disclosure of noncash investing and financing activities:
Stock issued in acquisitions	251,334
Contingent consideration liabilities	3,107	6,234
Notes payable and other financing obligations, including notes issued and debt assumed in connection with business acquisitions/investment	82,664	52,576
Noncash property, plant and equipment additions	$ 11,010	4,918
Notes and other financing receivables in connection with disposals of business/investment		$ 5,848

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
July 1, 2018 at Dec. 31, 2016		307,545
July 1, 2018 at Dec. 31, 2016	$ 3,442,949	$ 3,075	$ 1,116,690	$ 2,590,359	$ (267,175)
Net income	409,573
Net income attributable to LKQ stockholders	409,573			409,573
Other comprehensive income	169,563				169,563
Vesting of restricted stock units, net of shares withheld for employee tax		736
Vesting of restricted stock units, net of shares withheld for employee tax	(3,895)	$ 7	(3,902)
Stock-based compensation expense	17,582		17,582
Exercise of stock options		772
Exercise of stock options	6,465	$ 8	6,457
Shares withheld for net share settlement of stock option awards		(35)
Shares withheld for net share settlement of stock option awards	(1,200)		(1,200)
September 30, 2018 at Sep. 30, 2017		309,018
September 30, 2018 at Sep. 30, 2017	4,041,037	$ 3,090	1,135,627	2,999,932	(97,612)
July 1, 2018 at Jun. 30, 2017		308,621
July 1, 2018 at Jun. 30, 2017	3,856,685	$ 3,086	1,130,318	2,877,551	(154,270)
Net income	122,381
Net income attributable to LKQ stockholders	122,381			122,381
Other comprehensive income	56,658				56,658
Vesting of restricted stock units, net of shares withheld for employee tax		259
Vesting of restricted stock units, net of shares withheld for employee tax	(1,140)	$ 2	(1,142)
Stock-based compensation expense	5,139		5,139
Exercise of stock options		139
Exercise of stock options	1,314	$ 2	1,312
Shares withheld for net share settlement of stock option awards		(1)
September 30, 2018 at Sep. 30, 2017		309,018
September 30, 2018 at Sep. 30, 2017	4,041,037	$ 3,090	1,135,627	2,999,932	(97,612)
Noncontrolling interest	8,484					$ 8,484
July 1, 2018 at Dec. 31, 2017		309,127
July 1, 2018 at Dec. 31, 2017	4,206,653	$ 3,091	1,141,451	3,124,103	(70,476)
Net income	445,109
Less: net income attributable to noncontrolling interest	1,040					1,040
Net income attributable to LKQ stockholders	444,069			444,069
Other comprehensive income	(69,660)				(69,660)
Stock issued in acquisitions		8,056
Stock issued in acquisitions	251,334	$ 81	251,253
Vesting of restricted stock units, net of shares withheld for employee tax		600
Vesting of restricted stock units, net of shares withheld for employee tax	(3,711)	$ 6	(3,717)
Stock-based compensation expense	17,544		17,544
Exercise of stock options		441
Exercise of stock options	3,772	$ 4	3,768
Shares withheld for net share settlement of stock option awards		(27)
Shares withheld for net share settlement of stock option awards	(1,057)		(1,057)
Adoption of ASU 2018-02 (see Note 4)	5,345			(5,345)	5,345
Capital contributions from, net of dividends to, noncontrolling interest shareholder	3,182					3,182
Acquired noncontrolling interest	44,250					44,250
September 30, 2018 at Sep. 30, 2018		318,197
September 30, 2018 at Sep. 30, 2018	4,897,416	$ 3,182	1,409,242	3,562,827	(134,791)	56,956
Noncontrolling interest						57,503
July 1, 2018 at Jun. 30, 2018		317,821
July 1, 2018 at Jun. 30, 2018	4,776,975	$ 3,178	1,403,630	3,428,725	(116,061)
Net income	134,480
Less: net income attributable to noncontrolling interest	378					378
Net income attributable to LKQ stockholders	134,102			134,102
Other comprehensive income	(18,730)				(18,730)
Vesting of restricted stock units, net of shares withheld for employee tax		256
Vesting of restricted stock units, net of shares withheld for employee tax	(934)	$ 3	(937)
Stock-based compensation expense	5,700		5,700
Exercise of stock options		120
Exercise of stock options	850	$ 1	849
Capital contributions from, net of dividends to, noncontrolling interest shareholder	(925)					(925)
September 30, 2018 at Sep. 30, 2018		318,197
September 30, 2018 at Sep. 30, 2018	4,897,416	$ 3,182	$ 1,409,242	$ 3,562,827	$ (134,791)	$ 56,956
Noncontrolling interest	$ 56,956

Interim Financial Statements (N

Interim Financial Statements (Notes)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interim Financial Statements	Interim Financial Statements The accompanying unaudited condensed consolidated financial statements represent the consolidation of LKQ Corporation, a Delaware corporation, and its subsidiaries. LKQ Corporation is a holding company and all operations are conducted by subsidiaries. When the terms "LKQ," "the Company," "we," "us," or "our" are used in this document, those terms refer to LKQ Corporation and its consolidated subsidiaries. We have prepared the accompanying unaudited condensed consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") applicable to interim financial statements. Accordingly, certain information related to our significant accounting policies and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted. These unaudited condensed consolidated financial statements reflect, in the opinion of management, all material adjustments (which include only normally recurring adjustments) necessary to fairly state, in all material respects, our financial position, results of operations and cash flows for the periods presented. Operating results for interim periods are not necessarily indicative of the results that can be expected for any subsequent interim period or for a full year. These interim financial statements should be read in conjunction with our audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 28, 2018 ("2017 Form 10-K").

Business Combinations (Notes)

Business Combinations (Notes)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combinations	Business Combinations On May 30, 2018 , we acquired Stahlgruber GmbH ("Stahlgruber"), a leading European wholesale distributor of aftermarket spare parts for passenger cars, tools, capital equipment and accessories with operations in Germany, Austria, Slovenia, Croatia, and with further sales to Switzerland. Total acquisition date fair value of the consideration for our Stahlgruber acquisition was € 1.2 billion ($ 1.4 billion ), composed of € 1.0 billion ($ 1.1 billion ) of cash paid (net of cash acquired), and € 215 million ($ 251 million ) of newly issued shares of LKQ common stock. We financed the acquisition with the proceeds from €1.0 billion ( $1.2 billion ) of senior notes, the direct issuance to Stahlgruber's owner of 8,055,569 newly issued shares of LKQ common stock, and borrowings under our existing revolving credit facility. On May 3, 2018, the European Commission cleared the acquisition for the entire European Union, except with respect to the wholesale automotive parts business in the Czech Republic. The acquisition of the Czech Republic wholesale business has been referred to the Czech Republic competition authority for review. The Czech Republic wholesale business represents an immaterial portion of Stahlgruber's revenue and profitability. We recorded $ 929 million of goodwill related to our acquisition of Stahlgruber, of which we expect $292 million to be deductible for income tax purposes. In the period between the acquisition date and September 30, 2018 , Stahlgruber, which is reported in our Europe reportable segment, generated revenue of $ 637 million and operating income of $ 34 million . In addition to our acquisition of Stahlgruber, during the nine months ended September 30, 2018, we completed acquisitions of one wholesale business in North America and seven wholesale businesses in Europe. Total acquisition date fair value of the consideration for these acquisitions was $ 86 million , composed of $ 76 million of cash paid (net of cash acquired), $7 million of notes payable, and $3 million for the estimated value of contingent payments to former owners (with maximum potential payments totaling $5 million ). During the nine months ended September 30, 2018 , we recorded $72 million of goodwill related to these acquisitions, of which we expect an immaterial amount to be deductible for income tax purposes. In the period between the acquisition dates and September 30, 2018 , these acquisitions generated revenue of $19 million and operating income of $2 million . During the year ended December 31, 2017, we completed 26 acquisitions including 6 wholesale businesses in North America, 16 wholesale businesses in Europe and 4 Specialty businesses. Our acquisitions in Europe included the acquisition of four aftermarket parts distribution businesses in Belgium in July 2017 . Our Specialty acquisitions included the acquisition of the aftermarket business of Warn Industries, Inc. ("Warn"), a leading designer, manufacturer and marketer of high performance vehicle equipment and accessories, in November 2017 . Total acquisition date fair value of the consideration for our 2017 acquisitions was $542 million , composed of $510 million of cash paid (net of cash acquired), $6 million for the estimated value of contingent payments to former owners (with maximum potential payments totaling $19 million ), $5 million of other purchase price obligations (non-interest bearing) and $20 million of notes payable. We typically fund our acquisitions using borrowings under our credit facilities or other financing arrangements. During the year ended December 31, 2017, we recorded $307 million of goodwill related to these acquisitions, of which we expect $21 million to be deductible for income tax purposes. Our acquisitions are accounted for under the purchase method of accounting and are included in our consolidated financial statements from the dates of acquisition. The purchase prices were allocated to the net assets acquired based upon estimated fair values at the dates of acquisition. The purchase price allocations for the acquisitions made during the nine months ended September 30, 2018 and the last three months of the year ended December 31, 2017 are preliminary as we are in the process of determining the following: 1) valuation amounts for certain receivables, inventories and fixed assets acquired; 2) valuation amounts for certain intangible assets acquired; 3) the acquisition date fair value of certain liabilities assumed; and 4) the tax basis of the entities acquired. We have recorded preliminary estimates for certain of the items noted above and will record adjustments, if any, to the preliminary amounts upon finalization of the valuations. From the date of our preliminary allocation for Stahlgruber in the second quarter of 2018 through September 30, 2018, we recorded adjustments based on our valuation procedures, primarily related to inventory and current liabilities that resulted in the allocation of $1 million of goodwill to acquired net assets. From the date of our preliminary allocations for our other acquisitions completed in the first half of 2018, the measurement period adjustments recorded for acquisitions completed in prior periods were not material. The income statement effect of these measurement period adjustments for our Stahlgruber acquisition and our other acquisitions completed in the first half of 2018 that would have been recorded in previous reporting periods if the adjustments had been recognized as of the acquisition dates was immaterial. The balance sheet impact and income statement effect of other measurement-period adjustments recorded for acquisitions completed in prior periods were immaterial. The purchase price allocations for the acquisitions completed during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in thousands): Nine Months Ended Year Ended September 30, 2018 December, 31, 2017 Stahlgruber Other Acquisitions (2) Total All (1) Receivables $ 140,979 $ 15,369 $ 156,348 $ 73,782 Receivable reserves (2,818 ) (875 ) (3,693 ) (7,032 ) Inventories (3) 374,056 12,240 386,296 150,342 Prepaid expenses and other current assets 9,537 1,806 11,343 (295 ) Property , plant and equipment 260,661 6,089 266,750 41,039 Goodwill 929,376 68,254 997,630 314,817 Other intangibles 285,529 16,315 301,844 181,216 Other assets 16,625 37 16,662 3,257 Deferred income taxes (97,805 ) (716 ) (98,521 ) (65,087 ) Current liabilities assumed (343,221 ) (20,662 ) (363,883 ) (111,484 ) Debt assumed (65,852 ) (4,410 ) (70,262 ) (33,586 ) Other noncurrent liabilities assumed (4) (81,689 ) (9,993 ) (91,682 ) (1,917 ) Noncontrolling interest (44,250 ) — (44,250 ) — Contingent consideration liabilities — (3,107 ) (3,107 ) (6,234 ) Other purchase price obligations (2,349 ) 3,853 1,504 (5,074 ) Stock issued (251,334 ) — (251,334 ) — Notes issued — (6,948 ) (6,948 ) (20,187 ) Settlement of pre-existing balances — — — 242 Gains on bargain purchases (5) — (328 ) (328 ) (3,870 ) Settlement of other purchase price obligations (non-interest bearing) — 1,698 1,698 3,159 Cash used in acquisitions, net of cash acquired $ 1,127,445 $ 78,622 $ 1,206,067 $ 513,088 (1) The amounts recorded during the year ended December 31, 2017 include $6 million and $3 million of adjustments to reduce property, plant and equipment and other assets for Rhiag-Inter Auto Parts Italia S.r.l. (“Rhiag”) and Pittsburgh Glass Works LLC (“PGW”), respectively. (2) The amounts recorded during the nine months ended September 30, 2018 include a $5 million adjustment to increase other intangibles related to our Warn acquisition and $4 million of adjustments to reduce other purchase price obligations related to other 2017 acquisitions. (3) The amounts for our 2017 acquisitions include a $4 million step-up adjustment related to our Warn acquisition. (4) The amount recorded for our acquisition of Stahlgruber includes a $75 million liability for certain pension obligations. See Note 13, "Employee Benefit Plans" for information related to our defined benefit plans. (5) The amount recorded during the nine months ended September 30, 2018 is due to the gain on bargain purchase related to an acquisition in Europe completed in the second quarter of 2017 as a result of a change in the acquisition date fair value of the consideration. The amount recorded during the year ended December 31, 2017 includes a $2 million increase to the gain on bargain purchase recorded for our Andrew Page Limited ("Andrew Page") acquisition as a result of changes to our estimate of the fair value of the net assets acquired. The remainder of the gain on bargain purchase recorded during the year ended December 31, 2017 is an immaterial amount related to the previously mentioned acquisition in Europe completed in the second quarter of 2017. The fair value of our intangible assets is based on a number of inputs, including projections of future cash flows, assumed royalty rates and customer attrition rates, all of which are Level 3 inputs. The fair value of our property, plant and equipment is determined using inputs such as market comparables and current replacement or reproduction costs of the asset, adjusted for physical, functional and economic factors; these adjustments to arrive at fair value use unobservable inputs in which little or no market data exists, and therefore, these inputs are considered to be Level 3 inputs. See Note 12, "Fair Value Measurements " for further information regarding the tiers in the fair value hierarchy. The acquisition of Stahlgruber expands LKQ's geographic presence in continental Europe and serves as an additional strategic hub for our European operations. In addition, we believe the acquisition of Stahlgruber will allow for continued improvement in procurement, logistics and infrastructure optimization. The primary objectives of our other acquisitions made during the nine months ended September 30, 2018 and the year ended December 31, 2017 were to create economic value for our stockholders by enhancing our position as a leading source for alternative collision and mechanical repair products and to expand into other product lines and businesses that may benefit from our operating strengths. Certain 2017 acquisitions were completed to enable us to align our distribution model in the Benelux region. When we identify potential acquisitions, we attempt to target companies with a leading market presence, an experienced management team and workforce that provides a fit with our existing operations, and strong cash flows. For certain of our acquisitions, we have identified cost savings and synergies as a result of integrating the company with our existing business that provide additional value to the combined entity. In many cases, acquiring companies with these characteristics will result in purchase prices that include a significant amount of goodwill. The following pro forma summary presents the effect of the businesses acquired during the nine months ended September 30, 2018 as though the businesses had been acquired as of January 1, 2017, and the businesses acquired during the year ended December 31, 2017 as though they had been acquired as of January 1, 2016. The pro forma adjustments are based upon unaudited financial information of the acquired entities (in thousands, except per share data): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Revenue, as reported $ 3,122,378 $ 2,465,800 $ 8,873,893 $ 7,267,054 Revenue of purchased businesses for the period prior to acquisition: Stahlgruber — 473,326 815,405 1,289,083 Other acquisitions 6,641 83,893 51,132 387,844 Pro forma revenue $ 3,129,019 $ 3,023,019 $ 9,740,430 $ 8,943,981 Income from continuing operations, as reported (1) $ 134,480 $ 122,381 $ 445,109 $ 414,104 Income from continuing operations of purchased businesses for the period prior to acquisition, and pro forma purchase accounting adjustments: Stahlgruber 5,054 6,061 14,114 5,298 Other acquisitions 161 3,478 1,588 17,014 Acquisition related expenses, net of tax (2) 681 2,301 13,986 5,010 Pro forma income from continuing operations 140,376 134,221 474,797 441,426 Less: Pro forma net income attributable to noncontrolling interest — 888 2,799 2,157 Pro forma income from continuing operations attributable to LKQ stockholders $ 140,376 $ 133,333 $ 471,998 $ 439,269 Earnings per share from continuing operations, basic - as reported $ 0.42 $ 0.40 $ 1.42 $ 1.34 Effect of purchased businesses for the period prior to acquisition: Stahlgruber 0.02 0.02 0.05 0.02 Other acquisitions 0.00 0.01 0.01 0.06 Acquisition related expenses, net of tax (2) 0.00 0.01 0.04 0.02 Impact of share issuance from acquisition of Stahlgruber — (0.01 ) (0.02 ) (0.03 ) Pro forma earnings per share from continuing operations, basic (3) 0.44 0.42 1.49 1.39 Less: Pro forma net income attributable to noncontrolling interest — 0.00 0.01 0.01 Pro forma income from continuing operations attributable to LKQ stockholders $ 0.44 $ 0.42 $ 1.49 $ 1.39 Earnings per share from continuing operations, diluted - as reported $ 0.42 $ 0.39 $ 1.41 $ 1.33 Effect of purchased businesses for the period prior to acquisition: Stahlgruber 0.02 0.02 0.04 0.02 Other acquisitions 0.00 0.01 0.01 0.05 Acquisition related expenses, net of tax (2) 0.00 0.01 0.04 0.02 Impact of share issuance from acquisition of Stahlgruber — (0.01 ) (0.02 ) (0.03 ) Pro forma earnings per share from continuing operations, diluted (3) 0.44 0.42 1.49 1.39 Less: Pro forma net income attributable to noncontrolling interest — 0.00 0.01 0.01 Pro forma income from continuing operations attributable to LKQ stockholders $ 0.44 $ 0.42 $ 1.48 $ 1.38 (1) Includes interest expense for the period from April 9, 2018 through September 30, 2018 recorded on the senior notes issued in connection with our acquisition of Stahlgruber. (2) Includes expenses related to acquisitions closed in the period and excludes expenses for acquisitions not yet completed. (3) The sum of the individual earnings per share amounts may not equal the total due to rounding. Unaudited pro forma supplemental information is based upon accounting estimates and judgments that we believe are reasonable. The unaudited pro forma supplemental information includes the effect of purchase accounting adjustments, such as the adjustment of inventory acquired to fair value, adjustments to depreciation on acquired property, plant and equipment, adjustments to rent expense for above or below market leases, adjustments to amortization on acquired intangible assets, adjustments to interest expense, and the related tax effects. The pro forma impact of our acquisitions also reflects the elimination of acquisition related expenses, net of tax. Refer to Note 6, "Restructuring and Acquisition Related Expenses," for further information regarding our acquisition related expenses. The pro forma information also includes the impact of the common stock issued to Stahlgruber as if it were issued on January 1, 2017. These pro forma results are not necessarily indicative of what would have occurred if the acquisitions had been in effect for the periods presented or of future results.

Discontinued Operations (Notes)

Discontinued Operations (Notes)	9 Months Ended
	Sep. 30, 2018
Discontinued Operations [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	Discontinued Operations On March 1, 2017 , LKQ completed the sale of the glass manufacturing business of its PGW subsidiary to a subsidiary of Vitro S.A.B. de C.V. ("Vitro") for a sales price of $301 million , including cash received of $316 million , net of cash disposed of $15 million . Related to this transaction, the remaining portion of the Glass operating segment was combined with our Wholesale - North America operating segment, which is part of our North America reportable segment, in the first quarter of 2017. See Note 16, "Segment and Geographic Information " for further information regarding our segments. In connection with the Stock and Asset Purchase Agreement, the Company and Vitro entered into a twelve-month Transition Services Agreement commencing on the transaction date with two six-month renewal periods, a three-year Purchase and Supply Agreement, and an Intellectual Property Agreement. The following table summarizes the operating results of the Company’s discontinued operations related to the sale described above for the nine months ended September 30, 2017, as presented in Net loss from discontinued operations on the Unaudited Condensed Consolidated Statements of Income (in thousands): Nine Months Ended September 30, 2017 Revenue $ 111,130 Cost of goods sold 100,084 Selling, general and administrative expenses 8,369 Operating income 2,677 Interest and other income, net (1) 1,204 Income from discontinued operations before taxes 3,881 Provision for income taxes 3,598 Equity in loss of unconsolidated subsidiaries (534 ) Loss from discontinued operations, net of tax (251 ) Loss on sale of discontinued operations, net of tax (2) (4,280 ) Net loss from discontinued operations $ (4,531 ) (1) The Company elected to allocate interest expense to discontinued operations based on the expected debt to be repaid. Under this approach, allocated interest from January 1, 2017 through the date of sale was $2 million . This expense was offset by foreign currency gains. (2) In the first quarter of 2017, upon closing of the sale and write-off of the net assets of the glass manufacturing business, we recorded a pre-tax loss on sale of $9 million , and a $4 million tax benefit. The incremental loss primarily reflects a $6 million payable for intercompany sales from the glass manufacturing business to the aftermarket automotive glass distribution business incurred prior to closing, which was paid by LKQ during the second quarter of 2017, and capital expenditures in 2017 that were not reimbursed by the buyer. The glass manufacturing business had $4 million of operating cash outflows, $4 million of investing cash outflows mainly consisting of capital expenditures, and $15 million of financing cash inflows made up of parent financing for the period from January 1, 2017 through March 1, 2017. Pursuant to the Purchase and Supply Agreement , our aftermarket automotive glass distribution business will source various products from Vitro's glass manufacturing business annually for a three-year period beginning on March 1, 2017. Between January 1, 2017 and the sale date of March 1, 2017, intercompany sales between the glass manufacturing business and the continuing aftermarket automotive glass distribution business of PGW, which were eliminated in consolidation, were $8 million . All purchases from Vitro, including those outside of the Purchase and Supply Agreement, were $4 million and $22 million for the three and nine months ended September 30, 2018, respectively, and were $ 10 million and $27 million for the three months ended September 30, 2017 and the period between the sale date of March 1, 2017 and September 30, 2017, respectively.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Inventory	Inventories consist of the following (in thousands): September 30, December 31, 2018 2017 Aftermarket and refurbished products $ 2,287,776 $ 1,877,653 Salvage and remanufactured products 484,761 487,108 Manufactured products 22,357 16,022 Total inventories $ 2,794,894 $ 2,380,783 Aftermarket and refurbished products and salvage and remanufactured products are primarily composed of finished goods. As of September 30, 2018, manufactured products inventory was composed of $16 million of raw materials, $2 million of work in process, and $4 million of finished goods. As of December 31, 2017, manufactured products inventory was composed of $10 million of raw materials, $2 million of work in process, and $4 million of finished goods. Our May 2018 acquisition of Stahlgruber contributed $374 million to our aftermarket and refurbished products inventory. See Note 2, "Business Combinations" for further information on our acquisitions.
Receivables, Policy [Policy Text Block]	We have a reserve for uncollectible accounts, which was approximately $63 million and $58 million at September 30, 2018 and December 31, 2017, respectively. Our May 2018 acquisition of Stahlgruber contributed $ 3 million to our reserve for uncollectible accounts. See Note 2, "Business Combinations" for further information on our acquisitions.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adoption of New Revenue Standard In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update 2014-09, "Revenue from Contracts with Customers" ("ASU 2014-09"). This update outlines a new comprehensive revenue recognition model that supersedes the prior revenue recognition guidance and requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The FASB has issued several updates to ASU 2014-09, which collectively with ASU 2014-09, represent the FASB Accounting Standards Codification Topic 606 (“ASC 606”). On January 1, 2018, we adopted ASC 606 for all contracts using the modified retrospective method, which means the historical periods are presented under the previous revenue standards with the cumulative net income effect being adjusted through retained earnings. Most of the changes resulting from our adoption of ASC 606 were changes in presentation within the Unaudited Condensed Consolidated Balance Sheets and the Unaudited Condensed Consolidated Statements of Income. Therefore, while we made adjustments to certain opening balances on our January 1, 2018 balance sheet, we made no adjustments to opening retained earnings. We expect the impact of the adoption of ASC 606 to be immaterial to our net income on an ongoing basis. See Note 5, "Revenue Recognition" for the required disclosures under ASC 606. With the adoption of ASC 606, we reclassified certain amounts related to variable consideration. Under ASC 606, we are required to present a refund liability and a returns asset within the Unaudited Condensed Consolidated Balance Sheet, whereas in periods prior to adoption, we presented the estimated margin impact of expected returns as a contra-asset within accounts receivable. Additionally, under ASC 606, the changes in the refund liability are reported in revenue, and the changes in the returns assets are reported in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. Prior to adoption, the change in the reserve for returns was generally reported as a net amount within revenue. As a result, the income statement presentation was adjusted concurrently with the balance sheet change beginning in 2018. The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASC 606 was as follows (in thousands): Balance as of December 31, 2017 Adjustments Due to ASC 606 Balance as of January 1, 2018 Balance Sheet Assets Accounts receivable $ 1,027,106 $ 38,511 $ 1,065,617 Prepaid expenses and other current assets 134,479 44,508 178,987 Liabilities Refund liability — 83,019 83,019 The impact of the adoption of ASC 606 on our Unaudited Condensed Consolidated Balance Sheet as of September 30, 2018 and our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 was as follows (in thousands): Balance as of September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Balance Sheet Assets Accounts receivable $ 1,255,876 $ 1,205,833 $ 50,043 Prepaid expenses and other current assets 200,944 144,255 56,689 Liabilities Refund liability 106,732 — 106,732 For the three months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 3,122,378 $ 3,123,468 $ (1,090 ) Cost of goods sold 1,925,180 1,925,107 73 Selling, general and administrative expenses 879,150 880,313 (1,163 ) For the nine months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 8,873,893 $ 8,882,558 $ (8,665 ) Cost of goods sold 5,460,845 5,467,061 (6,216 ) Selling, general and administrative expenses 2,472,085 2,474,534 (2,449 ) We have not included a table of the impact of the balance sheet adjustments on the Unaudited Condensed Consolidated Statement of Cash Flows as the adjustment will net to zero within the operating activities section of this statement. Under ASC 606, we have elected not to adjust consideration for the effect of a significant financing component at contract inception if the period between the transfer of goods to the customer and payment received from the customer is one year or less. Generally, our payment terms are short term in nature, but in some instances we may offer extended terms to customers exceeding one year such that interest would be accrued with respect to those contracts. The interest that would be accrued related to these contracts is immaterial at September 30, 2018. Under ASC 340, "Other Assets and Deferred Costs," we have elected to recognize incremental costs of obtaining a contract (commissions earned by our sales representatives on product sales) as an expense when incurred, as we believe the amortization period of the asset would be one year or less due to the short-term nature of our contracts. Other Recently Adopted Accounting Pronouncements During the first quarter of 2018, we adopted ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”), which changes how entities will recognize, measure, present and make disclosures about certain financial assets and financial liabilities. The adoption of ASU 2016-01 did not have a significant impact on our financial position, results of operations, cash flows or disclosures. During the first quarter of 2018, we adopted ASU No. 2016-15, "Classification of Certain Cash Receipts and Cash Payments" ("ASU 2016-15"), which includes guidance on classification for the following items: debt prepayment or debt extinguishment costs, settlement of zero coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims and corporate-owned or bank-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and other separately identifiable cash flows where application of the predominance principle is prescribed. No adjustments were required in our Unaudited Condensed Consolidated Statement of Cash Flows upon adoption. Within our Unaudited Condensed Consolidating Statements of Cash Flows in Note 18, "Condensed Consolidating Financial Information ," we now present a new line item, Payments of deferred purchase price on receivables securitization, as a result of adopting ASU 2016-15; prior year cash flow information within this footnote has been recast to reflect the impact of adopting this accounting standard. Other than the addition of this new line item, there was no impact to our Unaudited Condensed Consolidating Statements of Cash Flows upon adoption. During the first quarter of 2018, we adopted ASU No. 2017-01, "Clarifying the Definition of a Business" (“ASU 2017-01”), which requires an evaluation of whether substantially all of the fair value of assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. If so, the transaction does not qualify as a business. The guidance also requires an acquired business to include at least one substantive process and narrows the definition of outputs. The adoption of ASU 2017-01 did not have a material impact on our unaudited condensed consolidated financial statements. During the first quarter of 2018, we adopted ASU No. 2018-02, "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" ("ASU 2018-02"), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the reduction of the U.S. federal statutory income tax rate to 21% from 35% due to the enactment of the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). In addition, under ASU 2018-02, an entity is required to provide certain disclosures regarding stranded tax effects. ASU 2018-02 is effective for fiscal years and interim periods beginning after December 15, 2018; early adoption is permitted. As a result of the adoption of ASU 2018-02, we recorded a $5 million reclassification to increase Accumulated Other Comprehensive (Loss) Income and decrease Retained Earnings. During the first quarter of 2018, we adopted ASU No. 2017-07, "Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost" ("ASU 2017-07"), which requires presentation of the current service cost component of net periodic benefit expense with other current compensation expenses for the related employees, and requires presentation of the remaining components of net periodic benefit expense, such as interest, expected return on plan assets, and amortization of actuarial gains and losses, outside of operating income. ASU 2017-07 also specifies that, on a prospective basis, only the service cost component is eligible for capitalization into inventory or other assets. While the income statement classification provisions of ASU 2017-07 are applicable on a retrospective basis, due to the immaterial impact to our Unaudited Condensed Consolidated Statements of Income in prior periods, we did not recast prior period income statement information and adopted the classification provisions on a prospective basis. The change in the capitalization provisions under ASU 2017-07 did not have a material impact on our unaudited condensed consolidated financial statements. See Note 13, "Employee Benefit Plans ," for further disclosure on the components of net periodic benefit expense and classification of the components within our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 and 2017. During the third quarter of 2018, the FASB issued ASU No. 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract" ("ASU 2018-15"). This update requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. ASU 2018-15 is effective for fiscal years and interim periods beginning after December 15, 2019; early adoption is permitted. We have adopted ASU 2018-15 in the third quarter of 2018 as we believe that our existing policy is consistent with the new guidance and thus no adjustments were required to be in compliance with this standard update. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, "Leases" ("ASU 2016-02"), to increase transparency and comparability by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The main difference between current GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under current GAAP. ASU 2016-02 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The standard requires that entities apply the effects of these changes using a modified retrospective approach, which includes a number of optional practical expedients. While we are still in the process of quantifying the impact that the adoption of ASU 2016-02 will have on our consolidated financial statements and related disclosures, we anticipate the adoption will materially affect our consolidated balance sheet and disclosures, as the majority of our operating leases will be recorded on the balance sheet under ASU 2016-02. While we do not anticipate the adoption of this accounting standard to have a material impact on our consolidated statements of income at this time, this conclusion may change as we finalize our assessment. In order to assist in our timely implementation of the new standard, we have purchased new software to track our leases. We have engaged a third party to assist with the implementation of the new software with an expectation to complete the implementation by the end of 2018. During the second quarter, we completed phase one of the software roll-out for our North America and Specialty operations. We are nearing completion of the phase one roll-out in our Europe operations as of the filing date of this Quarterly Report on Form 10-Q. In August 2017, the FASB issued ASU No. 2017-12, "Targeted Improvements to Accounting for Hedging Activities" ("ASU 2017-12"), which amends the hedge accounting recognition and presentation requirements in ASC 815 ("Derivatives and Hedging"). ASU 2017-12 significantly alters the hedge accounting model by making it easier for an entity to achieve and maintain hedge accounting and provides for accounting that better reflects an entity's risk management activities. ASU 2017-12 is effective for fiscal years and interim periods beginning after December 15, 2018; early adoption is permitted. Entities will adopt the provisions of ASU 2017-12 by applying a modified retrospective approach to existing hedging relationships as of the adoption date. At this time, we are still evaluating the impact of this standard on our financial statements. In August 2018, the FASB issued ASU No. 2018-13, "Disclosure Framework- Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13"), which removes, modifies, and adds certain disclosure requirements in ASC 820. ASU 2018-13 is effective for fiscal years and interim periods beginning after December 15, 2019; early adoption is permitted. We are in the process of evaluating the impact of this standard on our disclosures but do not believe that it will have a material impact. In August 2018, the FASB issued ASU No. 2018-14, "Disclosure Framework- Changes to the Disclosure Requirements for Defined Benefit Plans" ("ASU 2018-14"), which removes, modifies, and adds certain disclosure requirements to ASC 715-20. ASU 2018-14 is effective for fiscal years and interim periods beginning after December 15, 2020; early adoption is permitted. We are in the process of evaluating the impact of this standard on our disclosures.
Financial Statement Information [Line Items]	Financial Statement Information Allowance for Doubtful Accounts We have a reserve for uncollectible accounts, which was approximately $63 million and $58 million at September 30, 2018 and December 31, 2017, respectively. Our May 2018 acquisition of Stahlgruber contributed $ 3 million to our reserve for uncollectible accounts. See Note 2, "Business Combinations" for further information on our acquisitions. Inventories Inventories consist of the following (in thousands): September 30, December 31, 2018 2017 Aftermarket and refurbished products $ 2,287,776 $ 1,877,653 Salvage and remanufactured products 484,761 487,108 Manufactured products 22,357 16,022 Total inventories $ 2,794,894 $ 2,380,783 Aftermarket and refurbished products and salvage and remanufactured products are primarily composed of finished goods. As of September 30, 2018, manufactured products inventory was composed of $16 million of raw materials, $2 million of work in process, and $4 million of finished goods. As of December 31, 2017, manufactured products inventory was composed of $10 million of raw materials, $2 million of work in process, and $4 million of finished goods. Our May 2018 acquisition of Stahlgruber contributed $374 million to our aftermarket and refurbished products inventory. See Note 2, "Business Combinations" for further information on our acquisitions. Property, Plant and Equipment Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 The components of opening property, plant and equipment acquired as part of our acquisition of Stahlgruber in May 2018 are as follows (in thousands): Gross Amount Land and improvements $ 47,281 Buildings and improvements 125,649 Machinery and equipment 49,384 Computer equipment and software 3,760 Vehicles and trailers 643 Furniture and fixtures 28,535 Leasehold improvements 1,890 257,142 Construction in progress 3,519 Total property, plant and equipment $ 260,661 We record depreciation expense associated with our refurbishing, remanufacturing, manufacturing and furnace operations as well as our distribution centers in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. All other depreciation expense is reported in Depreciation and amortization. Total depreciation expense for the three and nine months ended September 30, 2018 was $39 million and $115 million , respectively, and $34 million and $93 million during the three and nine months ended September 30, 2017, respectively. Intangible Assets Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer and supplier relationships, software and other technology related assets, and covenants not to compete. The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2018 are as follows (in thousands): North America Europe Specialty Total Balance as of January 1, 2018 $ 1,709,354 $ 1,414,898 $ 412,259 $ 3,536,511 Business acquisitions and adjustments to previously recorded goodwill 1,073 1,002,277 (5,720 ) 997,630 Exchange rate effects (3,049 ) (55,901 ) 75 (58,875 ) Balance as of September 30, 2018 $ 1,707,378 $ 2,361,274 $ 406,614 $ 4,475,266 During the nine months ended September 30, 2018, we recorded $ 929 million of goodwill related to our acquisition of Stahlgruber. See Note 2, "Business Combinations" for further information on our acquisitions. The components of other intangibles, net are as follows (in thousands): September 30, 2018 December 31, 2017 Intangible assets subject to amortization $ 872,072 $ 664,969 Indefinite-lived intangible assets Trademarks 81,300 78,800 Total $ 953,372 $ 743,769 The components of intangible assets subject to amortization are as follows (in thousands): September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Trade names and trademarks $ 495,839 $ (88,805 ) $ 407,034 $ 327,332 $ (75,095 ) $ 252,237 Customer and supplier relationships 586,221 (223,085 ) 363,136 510,113 (167,532 ) 342,581 Software and other technology related assets 172,391 (73,760 ) 98,631 124,049 (59,081 ) 64,968 Covenants not to compete 13,488 (10,217 ) 3,271 14,981 (9,798 ) 5,183 Total $ 1,267,939 $ (395,867 ) $ 872,072 $ 976,475 $ (311,506 ) $ 664,969 The components of intangible assets acquired as part of our acquisitions in 2018 are as follows (in thousands): Nine Months Ended September 30, 2018 Stahlgruber Other Acquisitions Total Trade names and trademarks $ 173,946 $ 2,895 $ 176,841 Customer and supplier relationships 78,239 8,194 86,433 Software and other technology related assets 33,344 92 33,436 Total $ 285,529 $ 11,181 $ 296,710 The weighted-average amortization periods for our intangible assets acquired during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in years): Nine Months Ended Year Ended September 30, 2018 December 31, 2017 Stahlgruber Other Acquisitions Total All Acquisitions Trade names and trademarks 19.9 20.0 19.9 11.2 Customer and supplier relationships 3.0 9.6 3.6 18.6 Software and other technology related assets 6.8 6.0 6.8 11.1 Covenants not to compete - - - 4.4 Total acquired finite-lived intangible assets 13.7 12.2 13.7 16.5 Our estimated useful lives for our finite-lived intangible assets are as follows: Method of Amortization Useful Life Trade names and trademarks Straight-line 4-30 years Customer and supplier relationships Accelerated 3-20 years Software and other technology related assets Straight-line 3-15 years Covenants not to compete Straight-line 2-5 years Amortization expense for intangibles was $42 million and $96 million during the three and nine months ended September 30, 2018, respectively, and $26 million and $74 million during the three and nine months ended September 30, 2017, respectively. Estimated amortization expense for each of the five years in the period ending December 31, 2022 is $40 million (for the remaining three months of 2018), $136 million , $104 million , $75 million and $62 million , respectively. Investments in Unconsolidated Subsidiaries Our investment in unconsolidated subsidiaries was $157 million and $208 million as of September 30, 2018 and December 31, 2017, respectively. On December 1, 2016 , we acquired a 26.5% equity interest in Mekonomen AB ("Mekonomen") for an aggregate purchase price of $181 million . Headquartered in Stockholm, Sweden, Mekonomen is the leading independent car parts and service chain in the Nordic region of Europe, offering a range of products including spare parts and accessories for cars, and workshop services for consumers and businesses. As a result of the investment, we nominated two representatives for election to Mekonomen's board of directors; both representatives were subsequently elected to and continue to serve on the board of directors, including one as the chairman of the board. We are accounting for our interest in Mekonomen using the equity method of accounting, as our investment gives us the ability to exercise significant influence, but not control, over the investee. As of September 30, 2018, the book value of our investment in Mekonomen exceeded our share of the book value of Mekonomen's net assets by $64 million ; this difference is primarily related to goodwill and the fair value of other intangible assets. We are recording our equity in the net earnings of Mekonomen on a one quarter lag. We recorded equity losses of $20 million and $18 million during the three and nine months ended September 30, 2018, respectively, and equity in earnings of $3 million and $5 million during the three and nine months ended September 30, 2017 related to our investment in Mekonomen, including adjustments to convert the results to GAAP and to recognize the impact of our purchase accounting adjustments. In May 2018 and May 2017, we received cash dividends of $8 million (SEK 67 million ) and $7 million (SEK 67 million ), respectively, related to our investment in Mekonomen. On July 6, 2018, Mekonomen announced the acquisition of two automotive spare parts distributors in Denmark and Poland. The objective of the acquisition is to strengthen Mekonomen's position in the sale of automotive spare parts in northern Europe and to establish a strong market position in Denmark and Poland, where Mekonomen has no current operations. The acquisition is partially being financed by a rights issue with preferential rights for Mekonomen's existing shareholders, who were given the right to subscribe for four new Mekonomen shares per seven existing owned shares at a discounted share price. On October 5, 2018, we subscribed for our pro rata share in the rights issue giving us the right to acquire an additional $48 million of equity in Mekonomen at a discounted share price, retaining our 26.5% equity interest. We recorded a derivative instrument of $29 million in Other assets on our Unaudited Condensed Consolidated Balance Sheets, which represents our right to acquire Mekonomen shares at a discount. We are measuring the derivative instrument at fair value, and we recorded a $3 million gain on our fair value remeasurement during the three months ended September 30, 2018; the gain is recorded in Other income, net on the Unaudited Condensed Consolidated Statements of Income. In the fourth quarter, we will record an $8 million loss related to the settlement of the derivative instrument in October 2018 due to a decrease in the Mekonomen share price from the last day of the third quarter to the settlement date. We evaluated our investment in Mekonomen for other-than-temporary impairment as of September 30, 2018, and concluded the decline in fair value was other-than-temporary due to a prolonged and significant stock price decrease. Therefore, we recognized an other-than-temporary impairment of $23 million , which represents the difference in the carrying value and the fair value of our investment in Mekonomen. The fair value of our investment in Mekonomen was determined using the Mekonomen share price as of September 30, 2018. The impairment charge is recorded in Equity in (losses) earnings of unconsolidated subsidiaries in our Unaudited Condensed Consolidated Statements of Income. Equity in losses and earnings from our investment in Mekonomen are reported in the Europe segment. As a result of the impairment charge, the Level 1 fair value of our equity investment in the publicly traded Mekonomen common stock at September 30, 2018 approximated the carrying value of $134 million . Warranty Reserve Some of our salvage mechanical products are sold with a standard six month warranty against defects. Additionally, some of our remanufactured engines are sold with a standard three year warranty against defects. We also provide a limited lifetime warranty for certain of our aftermarket products. These assurance-type warranties are not considered a separate performance obligation, and thus no transaction price is allocated to them. We record the warranty costs in Cost of goods sold on our Unaudited Condensed Consolidated Statements of Income. Our warranty reserve is calculated using historical claim information to project future warranty claims activity and is recorded within Other accrued expenses and Other noncurrent liabilities on our Unaudited Condensed Consolidated Balance Sheets based on the expected timing of the related payments. The changes in the warranty reserve are as follows (in thousands): Balance as of December 31, 2017 $ 23,151 Warranty expense 33,670 Warranty claims (31,980 ) Balance as of September 30, 2018 $ 24,841 Recent Accounting Pronouncements Adoption of New Revenue Standard In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update 2014-09, "Revenue from Contracts with Customers" ("ASU 2014-09"). This update outlines a new comprehensive revenue recognition model that supersedes the prior revenue recognition guidance and requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The FASB has issued several updates to ASU 2014-09, which collectively with ASU 2014-09, represent the FASB Accounting Standards Codification Topic 606 (“ASC 606”). On January 1, 2018, we adopted ASC 606 for all contracts using the modified retrospective method, which means the historical periods are presented under the previous revenue standards with the cumulative net income effect being adjusted through retained earnings. Most of the changes resulting from our adoption of ASC 606 were changes in presentation within the Unaudited Condensed Consolidated Balance Sheets and the Unaudited Condensed Consolidated Statements of Income. Therefore, while we made adjustments to certain opening balances on our January 1, 2018 balance sheet, we made no adjustments to opening retained earnings. We expect the impact of the adoption of ASC 606 to be immaterial to our net income on an ongoing basis. See Note 5, "Revenue Recognition" for the required disclosures under ASC 606. With the adoption of ASC 606, we reclassified certain amounts related to variable consideration. Under ASC 606, we are required to present a refund liability and a returns asset within the Unaudited Condensed Consolidated Balance Sheet, whereas in periods prior to adoption, we presented the estimated margin impact of expected returns as a contra-asset within accounts receivable. Additionally, under ASC 606, the changes in the refund liability are reported in revenue, and the changes in the returns assets are reported in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. Prior to adoption, the change in the reserve for returns was generally reported as a net amount within revenue. As a result, the income statement presentation was adjusted concurrently with the balance sheet change beginning in 2018. The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASC 606 was as follows (in thousands): Balance as of December 31, 2017 Adjustments Due to ASC 606 Balance as of January 1, 2018 Balance Sheet Assets Accounts receivable $ 1,027,106 $ 38,511 $ 1,065,617 Prepaid expenses and other current assets 134,479 44,508 178,987 Liabilities Refund liability — 83,019 83,019 The impact of the adoption of ASC 606 on our Unaudited Condensed Consolidated Balance Sheet as of September 30, 2018 and our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 was as follows (in thousands): Balance as of September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Balance Sheet Assets Accounts receivable $ 1,255,876 $ 1,205,833 $ 50,043 Prepaid expenses and other current assets 200,944 144,255 56,689 Liabilities Refund liability 106,732 — 106,732 For the three months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 3,122,378 $ 3,123,468 $ (1,090 ) Cost of goods sold 1,925,180 1,925,107 73 Selling, general and administrative expenses 879,150 880,313 (1,163 ) For the nine months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 8,873,893 $ 8,882,558 $ (8,665 ) Cost of goods sold 5,460,845 5,467,061 (6,216 ) Selling, general and administrative expenses 2,472,085 2,474,534 (2,449 ) We have not included a table of the impact of the balance sheet adjustments on the Unaudited Condensed Consolidated Statement of Cash Flows as the adjustment will net to zero within the operating activities section of this statement. Under ASC 606, we have elected not to adjust consideration for the effect of a significant financing component at contract inception if the period between the transfer of goods to the customer and payment received from the customer is one year or less. Generally, our payment terms are short term in nature, but in some instances we may offer extended terms to customers exceeding one year such that interest would be accrued with respect to those contracts. The interest that would be accrued related to these contracts is immaterial at September 30, 2018. Under ASC 340, "Other Assets and Deferred Costs," we have elected to recognize incremental costs of obtaining a contract (commissions earned by our sales representatives on product sales) as an expense when incurred, as we believe the amortization period of the asset would be one year or less due to the short-term nature of our contracts. Other Recently Adopted Accounting Pronouncements During the first quarter of 2018, we adopted ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”), which changes how entities will recognize, measure, present and make disclosures about certain financial assets and financial liabilities. The adoption of ASU 2016-01 did not have a significant impact on our financial position, results of operations, cash flows or disclosures. During the first quarter of 2018, we adopted ASU No. 2016-15, "Classification of Certain Cash Receipts and Cash Payments" ("ASU 2016-15"), which includes guidance on classification for the following items: debt prepayment or debt extinguishment costs, settlement of zero coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims and corporate-owned or bank-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and other separately identifiable cash flows where application of the predominance principle is prescribed. No adjustments were required in our Unaudited Condensed Consolidated Statement of Cash Flows upon adoption. Within our Unaudited Condensed Consolidating Statements of Cash Flows in Note 18, "Condensed Consolidating Financial Information ," we now present a new line item, Payments of deferred purchase price on receivables securitization, as a result of adopting ASU 2016-15; prior year cash flow information within this footnote has been recast to reflect the impact of adopting this accounting standard. Other than the addition of this new line item, there was no impact to our Unaudited Condensed Consolidating Statements of Cash Flows upon adoption. During the first quarter of 2018, we adopted ASU No. 2017-01, "Clarifying the Definition of a Business" (“ASU 2017-01”), which requires an evaluation of whether substantially all of the fair value of assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. If so, the transaction does not qualify as a business. The guidance also requires an acquired business to include at least one substantive process and narrows the definition of outputs. The adoption of ASU 2017-01 did not have a material impact on our unaudited condensed consolidated financial statements. During the first quarter of 2018, we adopted ASU No. 2018-02, "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" ("ASU 2018-02"), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the reduction of the U.S. federal statutory income tax rate to 21% from 35% due to the enactment of the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). In addition, under ASU 2018-02, an entity is required to provide certain disclosures regarding stranded tax effects. ASU 2018-02 is effective for fiscal years and interim periods beginning after December 15, 2018; early adoption is permitted. As a result of the adoption of ASU 2018-02, we recorded a $5 million reclassification to increase Accumulated Other Comprehensive (Loss) Income and decrease Retained Earnings. During the first quarter of 2018, we adopted ASU No. 2017-07, "Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost" ("ASU 2017-07"), which requires presentation of the current service cost component of net periodic benefit expense with other current compensation expenses for the related employees, and requires presentation of the remaining components of net periodic benefit expense, such as interest, expected return on plan assets, and amortization of actuarial gains and losses, outside of operating income. ASU 2017-07 also specifies that, on a prospective basis, only the service cost component is eligible for capitalization into inventory or other assets. While the income statement classification provisions of ASU 2017-07 are applicable on a retrospective basis, due to the immaterial impact to our Unaudited Condensed Consolidated Statements of Income in prior periods, we did not recast prior period income statement information and adopted the classification provisions on a prospective basis. The change in the capitalization provisions under ASU 2017-07 did not have a material impact on our unaudited condensed consolidated financial statements. See Note 13, "Employee Benefit Plans ," for further disclosure on the components of net periodic benefit expense and classification of the components within our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 and 2017. During the third quarter of 2018, the FASB issued ASU No. 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract" ("ASU 2018-15"). This update requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. ASU 2018-15 is effective for fiscal years and interim periods beginning after December 15, 2019; early adoption is permitted. We have adopted ASU 2018-15 in the third quarter of 2018 as we believe that our existing policy is consistent with the new guidance and thus no adjustments were required to be in compliance with this standard update. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, "Leases" ("ASU 2016-02"), to increase transparency and comparability by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The main difference between current GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under current GAAP. ASU 2016-02 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The standard requires that entities apply the effects of these changes using a modified retrospective approach, which includes a number of optional practical expedients. While we are still in the process of quantifying the impact that the adoption of ASU 2016-02 will have on our consolidated financial statements and related disclosures, we anticipate the adoption will materially affect our consolidated balance sheet and disclosures, as the majority of our operating leases will be recorded on the balance sheet under ASU 2016-02. While we do not anticipate the adoption of this accounting standard to have a material impact on our consolidated statements of income at this time, this conclusion may change as we finalize our assessment. In order to assist in our timely implementation of the new standard, we have purchased new software to track our leases. We have engaged a third party to assist with the implementation of the new software with an expectation to complete the implementation by the end of 2018. During the second quarter, we completed phase one of the software roll-out for our North America and Specialty operations. We are nearing completion of the phase one roll-out in our Europe operations as of the filing date of this Quarterly Report on Form 10-Q. In August 2017, the FASB issued ASU No. 2017-12, "Targeted Improvements to Accounting for Hedging Activities" ("ASU 2017-12"), which amends the hedge accounting recognition and presentation requirements in ASC 815 ("Derivatives and Hedging"). ASU 2017-12 significantly alters the hedge accounting model by making it easier for an entity to achieve and maintain hedge accounting and provides for accounting that better reflects an entity's risk management activities. ASU 2017-12 is effective for fiscal years and interim periods beginning after December 15, 2018; early adoption is permitted. Entities will adopt the provisions of ASU 2017-12 by applying a modified retrospective approach to existing hedging relationships as of the adoption date. At this time, we are still evaluating the impact of this standard on our financial statements. In August 2018, the FASB issued ASU No. 2018-13, "Disclosure Framework- Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13"), which removes, modifies, and adds certain disclosure requirements in ASC 820. ASU 2018-13 is effective for fiscal years and interim periods beginning after December 15, 2019; early adoption is permitted. We are in the process of evaluating the impact of this standard on our disclosures but do not believe that it will have a material impact. In August 2018, the FASB issued ASU No. 2018-14, "Disclosure Framework- Changes to the Disclosure Requirements for Defined Benefit Plans" ("ASU 2018-14"), which removes, modifies, and adds certain disclosure requirements to ASC 715-20. ASU 2018-14 is effective for fiscal years and interim periods beginning after December 15, 2020; early adoption is permitted. We are in the process of evaluating the impact of this standard on our disclosures.

Revenue Recognition Revenue Rec

Revenue Recognition Revenue Reconition (Notes)	9 Months Ended
	Sep. 30, 2018
Revenue Recognition [Abstract]
Revenue From Contract With Customer	Revenue Recognition The core principle of ASC 606 is to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASC 606 defines a five-step process to achieve this core principle, which includes: 1. Identifying contracts with customers, 2. Identifying performance obligations within those contracts, 3. Determining the transaction price, 4. Allocating the transaction price to the performance obligations in the contract, which may include an estimate of variable consideration, and 5. Recognizing revenue when or as each performance obligation is satisfied. The majority of our revenue is derived from the sale of vehicle parts. Under both the previous revenue standards and ASC 606, we recognize revenue when the products are shipped to, delivered to or picked up by customers and title has transferred. Sources of Revenue We report our revenue in two categories: (i) parts and services and (ii) other. The following table sets forth our revenue by category, with our parts and services revenue further disaggregated by reportable segment (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 North America $ 1,109,067 $ 1,051,470 $ 3,447,074 $ 3,207,001 Europe 1,464,049 952,765 3,781,091 2,659,804 Specialty 388,865 329,522 1,151,172 1,005,776 Parts and services 2,961,981 2,333,757 8,379,337 6,872,581 Other 160,397 132,043 494,556 394,473 Total revenue $ 3,122,378 $ 2,465,800 $ 8,873,893 $ 7,267,054 Parts and Services Our parts revenue is generated from the sale of vehicle products including replacement parts, components and systems used in the repair and maintenance of vehicles and specialty products and accessories to improve the performance, functionality and appearance of vehicles. Services revenue includes additional services that are generally billed concurrently with the related product sales, such as the sale of service-type warranties and fees for admission to our self service yards. In North America, our vehicle replacement products include sheet metal collision parts such as doors, hoods, and fenders; bumper covers; head and tail lamps; automotive glass products such as windshields; mirrors and grilles; wheels; and large mechanical items such as engines and transmissions. In Europe, our products include a wide variety of small mechanical products such as brake pads, discs and sensors; clutches; electrical products such as spark plugs and batteries; steering and suspension products; filters; and oil and automotive fluids. In our Specialty operations, we serve six product segments: truck and off-road; speed and performance; RV; towing; wheels, tires and performance handling; and miscellaneous accessories. Our service-type warranties typically have service periods ranging from 6 months to 36 months . Under ASC 606, proceeds from these service-type warranties are deferred at contract inception and amortized on a straight-line basis to revenue over the contract period. The changes in deferred service-type warranty revenue are as follows (in thousands): Balance as of January 1, 2018 $ 19,465 Additional warranty revenue deferred 28,889 Warranty revenue recognized (25,200 ) Balance as of September 30, 2018 $ 23,154 Other Revenue Revenue from other sources includes scrap sales, bulk sales to mechanical manufacturers (including cores) and sales of aluminum ingots and sows from our furnace operations. We derive scrap metal from several sources, including vehicles that have been used in both our wholesale and self service recycling operations and from OEMs and other entities that contract with us for secure disposal of "crush only" vehicles. The sale of hulks in our wholesale and self service recycling operations represents one performance obligation, and revenue is recognized based on a price per weight when the customer (processor) collects the scrap. Some adjustments may occur when the customer weighs the scrap at their location, and revenue is adjusted accordingly. We constrain our estimate of consideration to be received to the extent that we believe there will be a significant reversal in revenue. Revenue by Geographic Area See Note 16, "Segment and Geographic Information" for information related to our revenue by geographic region. Variable Consideration The amount of revenue ultimately received from the customer can vary due to variable consideration which includes returns, discounts, rebates, refunds, credits, price concessions, incentives, performance bonuses, or other similar items. The previous revenue guidance required us to estimate the transaction price using a best estimate approach. Under ASC 606 we are required to select the “expected value method” or the “most likely amount” method in order to estimate variable consideration. We utilize both methods in practice depending on the type of variable consideration. In addition, our estimates of variable consideration are constrained to the extent that a significant reversal in revenue is expected. We recorded a refund liability and return asset for expected returns of $107 million and $57 million , respectively, as of September 30, 2018 and a net reserve of $38 million as of December 31, 2017. The refund liability is presented separately on the balance sheet within current liabilities while the return asset is presented within prepaid expenses and other current assets. Other types of variable consideration consist primarily of discounts, volume rebates, and other customer sales incentives which are recorded in Receivables, net on the Unaudited Condensed Consolidated Balance Sheets. We recorded a reserve for our variable consideration of $114 million and $78 million as of September 30, 2018 and December 31, 2017, respectively. While other customer incentive programs exist, we characterize them as material rights in the context of our sales transactions. We consider these programs to be immaterial to our consolidated financial statements.

Restructuring and Acquisition R

Restructuring and Acquisition Related Expenses (Notes)	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Acquisition Related Expenses	Restructuring and Acquisition Related Expenses Acquisition Related Expenses Acquisition related expenses, which include external costs such as legal, accounting and advisory fees, totaled $1 million and $17 million for the three and nine months ended September 30, 2018, respectively. Our 2018 expenses primarily consisted of external costs related to our acquisition of Stahlgruber totaling $1 million and $15 million for the three and nine months ended September 30, 2018, respectively. The remaining acquisition related costs related to (i) completed acquisitions, (ii) pending acquisitions as of September 30, 2018, and (iii) potential acquisitions that were terminated. Acquisition related expenses for the three and nine months ended September 30, 2017 totaled $3 million and $8 million , respectively. Our 2017 expenses related to completed acquisitions and acquisitions that were pending as of September 30, 2017. Acquisition Integration Plans and Restructuring During the three and nine months ended September 30, 2018 , we incurred $5 million and $10 million of restructuring expenses, respectively. Restructuring expenses for the three months ended September 30, 2018 primarily consisted of $4 million related to the integration of our acquisition of Andrew Page and $1 million related to our Specialty segment; restructuring expenses for the nine months ended September 30, 2018 primarily consisted of $8 million related to the integration of our acquisition of Andrew Page and $2 million related to our Specialty segment. These integration activities included the closure of duplicate facilities and termination of employees. During each of the three and nine months ended September 30, 2017 , we incurred $2 million of restructuring expenses, primarily related to the ongoing integration activities in our Specialty segment. Expenses incurred were primarily related to facility closures and the merger of existing facilities into larger distribution centers. We expect to incur additional expenses related to the integration of certain of our acquisitions into our existing operations in 2018 and 2019. These integration activities are expected to include the closure of duplicate facilities, rationalization of personnel in connection with the consolidation of overlapping facilities with our existing business, and moving expenses. Future expenses to complete these integration plans are expected to be less than $10 million .

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plans	In order to attract and retain employees, non-employee directors, consultants, and other persons associated with us, we may grant qualified and nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), performance shares and performance units under the LKQ Corporation 1998 Equity Incentive Plan (the “Equity Incentive Plan”). We have granted RSUs, stock options, and restricted stock under the Equity Incentive Plan. We expect to issue new or treasury shares of common stock to cover past and future equity grants. RSUs RSUs vest over periods of up to five years, subject to a continued service condition. Currently outstanding RSUs contain either a time-based vesting condition or a combination of a performance-based vesting condition and a time-based vesting condition, in which case both conditions must be met before any RSUs vest. For most of the RSUs containing a performance-based vesting condition, the Company must report positive diluted earnings per share, subject to certain adjustments, during any fiscal year period within five years following the grant date; we have an immaterial amount of RSUs containing other performance-based vesting conditions. Each RSU converts into one share of LKQ common stock on the applicable vesting date. The grant date fair value of RSUs is based on the market price of LKQ stock on the grant date. The fair value of RSUs that vested during the nine months ended September 30, 2018 was $27 million . The following table summarizes activity related to our RSUs under the Equity Incentive Plan for the nine months ended September 30, 2018: Number Outstanding Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) (1) Unvested as of January 1, 2018 1,624,390 $ 29.94 Granted 601,802 $ 42.58 Vested (698,903 ) $ 30.07 Forfeited / Canceled (33,767 ) $ 33.28 Unvested as of September 30, 2018 1,493,522 $ 34.89 Expected to vest after September 30, 2018 1,344,519 $ 34.88 2.6 $ 42,581 (1) The aggregate intrinsic value of expected to vest RSUs represents the total pretax intrinsic value (the fair value of the Company's stock on the last day of each period multiplied by the number of units) that would have been received by the holders had all RSUs vested. This amount changes based on the market price of the Company’s common stock. Stock Options Stock options vest over periods of up to five years, subject to a continued service condition. Stock options expire either six or ten years from the date they are granted. No options were granted during the nine months ended September 30, 2018. No options vested during the nine months ended September 30, 2018; all of our outstanding options are fully vested. The following table summarizes activity related to our stock options under the Equity Incentive Plan for the nine months ended September 30, 2018: Number Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) (1) Balance as of January 1, 2018 1,738,073 $ 9.20 Exercised (441,495 ) $ 8.54 $ 12,678 Canceled (509 ) $ 32.31 Balance as of September 30, 2018 1,296,069 $ 9.42 1.0 $ 28,862 Exercisable as of September 30, 2018 1,296,069 $ 9.42 1.0 $ 28,862 (1) The aggregate intrinsic value of outstanding and exercisable options represents the total pretax intrinsic value (the difference between the fair value of the Company's stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of the last day of the period indicated. This amount changes based on the market price of the Company’s common stock. Stock-Based Compensation Expense Pre-tax stock-based compensation expense for RSUs totaled $6 million and $18 million for the three and nine months ended September 30, 2018, respectively, and $5 million and $18 million for the three and nine months ended September 30, 2017, respectively. As of September 30, 2018, unrecognized compensation expense related to unvested RSUs is $40 million . Stock-based compensation expense related to these awards will be different to the extent that forfeitures ar e realized.

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share (Notes)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Earnings Per Share The following chart sets forth the computation of earnings per share (in thousands, except per share amounts): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Income from continuing operations $ 134,480 $ 122,381 $ 445,109 $ 414,104 Denominator for basic earnings per share—Weighted-average shares outstanding 318,082 308,909 313,417 308,451 Effect of dilutive securities: RSUs 333 485 452 501 Stock options 987 1,385 1,082 1,543 Denominator for diluted earnings per share—Adjusted weighted-average shares outstanding 319,402 310,779 314,951 310,495 Basic earnings per share from continuing operations $ 0.42 $ 0.40 $ 1.42 $ 1.34 Diluted earnings per share from continuing operations $ 0.42 $ 0.39 $ 1.41 $ 1.33 The following table sets forth the number of employee stock-based compensation awards outstanding but not included in the computation of diluted earnings per share because their effect would have been antidilutive for the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Antidilutive securities: RSUs 375 — 317 50 Stock options — — — 51

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The components of Accumulated Other Comprehensive Income (Loss) are as follows (in thousands): Three Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) Unrealized (Loss) Gain on Pension Plans Other Comprehensive Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (125,753 ) $ 19,684 $ (10,200 ) $ 208 $ (116,061 ) Pretax (loss) income (23,405 ) 7,681 1,217 — (14,507 ) Income tax effect 2,454 (1,796 ) 41 — 699 Reclassification of unrealized (gain) loss — (7,284 ) 21 — (7,263 ) Reclassification of deferred income taxes — 1,703 (5 ) — 1,698 Other comprehensive income from unconsolidated subsidiaries — — — 643 643 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Three Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (157,353 ) $ 10,324 $ (6,640 ) $ (601 ) $ (154,270 ) Pretax income (loss) 63,769 (15,402 ) — — 48,367 Income tax effect (4,151 ) 5,683 — — 1,532 Reclassification of unrealized loss (gain) — 12,591 (200 ) — 12,391 Reclassification of deferred income taxes — (4,648 ) 50 — (4,598 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,034 ) (1,034 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 ) Nine Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) on Cash Flow Hedges Unrealized (Loss) Gain on Pension Plans Other Comprehensive (Loss) Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (71,933 ) $ 11,538 $ (8,772 ) $ (1,309 ) $ (70,476 ) Pretax (loss) income (82,137 ) 33,901 (102 ) — (48,338 ) Income tax effect 4,507 (7,926 ) (125 ) — (3,544 ) Reclassification of unrealized (gain) loss — (26,117 ) 97 — (26,020 ) Reclassification of deferred income taxes — 6,106 (24 ) — 6,082 Other comprehensive income from unconsolidated subsidiaries — — — 2,160 2,160 Adoption of ASU 2018-02 2,859 2,486 — — 5,345 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Nine Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (272,529 ) $ 8,091 $ (2,737 ) $ — $ (267,175 ) Pretax income (loss) 177,434 (44,749 ) 112 — 132,797 Income tax effect (4,151 ) 16,463 (43 ) — 12,269 Reclassification of unrealized loss (gain) — 45,551 (921 ) — 44,630 Reclassification of deferred income taxes — (16,808 ) 235 — (16,573 ) Disposal of business, net 1,511 — (3,436 ) — (1,925 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,635 ) (1,635 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 ) Net unrealized gains on our interest rate swaps totaling $2 million and $5 million were reclassified to Interest expense, net in our Unaudited Condensed Consolidated Statements of Income during the three and nine months ended September 30, 2018, respectively, compared to a loss of $1 million during the nine months ended September 30, 2017; the amount reclassified to Interest expense, net during the three months ended September 30, 2017 was immaterial. We also reclassified gains of $2 million to Interest expense, net related to the foreign currency forward component of our cross currency swaps during each of the three months ended September 30, 2018 and 2017, and gains of $6 million during each of the nine months ended September 30, 2018 and 2017. Also related to our cross currency swaps, we reclassified gains of $3 million and $15 million to Other income, net in our Unaudited Condensed Consolidated Statements of Income during the three and nine months ended September 30, 2018, respectively, compared to losses of $15 million and $50 million during the three and nine months ended September 30, 2017; these gains and losses offset the impact of the remeasurement of the underlying contracts. The deferred income taxes related to our cash flow hedges were reclassified from Accumulated other comprehensive income (loss) to provision for income taxes. As a result of the adoption of ASU 2018-02 in the first quarter of 2018, we recorded a $5 million reclassification to increase Accumulated Other Comprehensive (Loss) Income and decrease Retained Earnings. See Note 4, "Financial Statement Information" for further information regarding the adoption of ASU 2018-02. The components of Accumulated Other Comprehensive Income (Loss) are as follows (in thousands): Three Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) Unrealized (Loss) Gain on Pension Plans Other Comprehensive Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (125,753 ) $ 19,684 $ (10,200 ) $ 208 $ (116,061 ) Pretax (loss) income (23,405 ) 7,681 1,217 — (14,507 ) Income tax effect 2,454 (1,796 ) 41 — 699 Reclassification of unrealized (gain) loss — (7,284 ) 21 — (7,263 ) Reclassification of deferred income taxes — 1,703 (5 ) — 1,698 Other comprehensive income from unconsolidated subsidiaries — — — 643 643 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Three Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (157,353 ) $ 10,324 $ (6,640 ) $ (601 ) $ (154,270 ) Pretax income (loss) 63,769 (15,402 ) — — 48,367 Income tax effect (4,151 ) 5,683 — — 1,532 Reclassification of unrealized loss (gain) — 12,591 (200 ) — 12,391 Reclassification of deferred income taxes — (4,648 ) 50 — (4,598 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,034 ) (1,034 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 ) Nine Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) on Cash Flow Hedges Unrealized (Loss) Gain on Pension Plans Other Comprehensive (Loss) Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (71,933 ) $ 11,538 $ (8,772 ) $ (1,309 ) $ (70,476 ) Pretax (loss) income (82,137 ) 33,901 (102 ) — (48,338 ) Income tax effect 4,507 (7,926 ) (125 ) — (3,544 ) Reclassification of unrealized (gain) loss — (26,117 ) 97 — (26,020 ) Reclassification of deferred income taxes — 6,106 (24 ) — 6,082 Other comprehensive income from unconsolidated subsidiaries — — — 2,160 2,160 Adoption of ASU 2018-02 2,859 2,486 — — 5,345 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Nine Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (272,529 ) $ 8,091 $ (2,737 ) $ — $ (267,175 ) Pretax income (loss) 177,434 (44,749 ) 112 — 132,797 Income tax effect (4,151 ) 16,463 (43 ) — 12,269 Reclassification of unrealized loss (gain) — 45,551 (921 ) — 44,630 Reclassification of deferred income taxes — (16,808 ) 235 — (16,573 ) Disposal of business, net 1,511 — (3,436 ) — (1,925 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,635 ) (1,635 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 )

Long-Term Obligations

Long-Term Obligations	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Long-Term Obligations	Long-Term Obligations Long-term obligations consist of the following (in thousands): September 30, December 31, 2018 2017 Senior secured credit agreement: Term loans payable $ 590,000 $ 704,800 Revolving credit facilities 1,183,626 1,283,551 U.S. Notes (2023) 600,000 600,000 Euro Notes (2024) 580,200 600,150 Euro Notes (2026/28) 1,160,400 — Receivables securitization facility 100,000 100,000 Notes payable through May 2027 at weighted average interest rates of 1.5% and 1.4%, respectively 38,641 29,146 Other long-term debt at weighted average interest rates of 2.2% and 1.7%, respectively 151,502 110,633 Total debt 4,404,369 3,428,280 Less: long-term debt issuance costs (31,251 ) (21,476 ) Less: current debt issuance costs (4,616 ) (2,824 ) Total debt, net of debt issuance costs 4,368,502 3,403,980 Less: current maturities, net of debt issuance costs (118,365 ) (126,360 ) Long term debt, net of debt issuance costs $ 4,250,137 $ 3,277,620 Senior Secured Credit Agreement On December 1, 2017, LKQ Corporation, LKQ Delaware LLP, and certain other subsidiaries (collectively, the "Borrowers") entered into Amendment No. 2 to the Fourth Amended and Restated Credit Agreement ("Credit Agreement"), which amended the Fourth Amended and Restated Credit Agreement dated January 29, 2016 by modifying certain terms to (1) extend the maturity date by approximately two years to January 29, 2023; (2) increase the total availability under the revolving credit facility's multicurrency component from $2.45 billion to $2.75 billion ; (3) increase the permitted net leverage ratio thresholds, including a temporary step-up in the allowable net leverage ratio in the case of permitted acquisitions; (4) modify the applicable margins and fees in the pricing grid; (5) increase the ability of LKQ and its subsidiaries to incur additional indebtedness; and (6) make other immaterial or clarifying modifications and amendments. The increase in the revolving credit facility's multicurrency component of $300 million will be used for general corporate purposes. Amounts under the revolving credit facility are due and payable upon maturity of the Credit Agreement on January 29, 2023. Term loan borrowings, which totaled $590 million as of September 30, 2018, are due and payable in quarterly installments equal to $9 million on the last day of each fiscal quarter ending on or after December 31, 2021, with the remaining balance due and payable on January 29, 2023. During the three months ended September 30, 2018, we prepaid our required quarterly installments through September 30, 2021. We are required to prepay the term loan by amounts equal to proceeds from the sale or disposition of certain assets if the proceeds are not reinvested within twelve months. We also have the option to prepay outstanding amounts under the Credit Agreement without penalty. The Credit Agreement contains customary representations and warranties and customary covenants that provide limitations and conditions on our ability to enter into certain transactions. The Credit Agreement also contains financial and affirmative covenants, including limitations on our net leverage ratio and a minimum interest coverage ratio. Borrowings under the Credit Agreement bear interest at variable rates, which depend on the currency and duration of the borrowing elected, plus an applicable margin. The applicable margin is subject to change in increments of 0.25% depending on our net leverage ratio. Interest payments are due on the last day of the selected interest period or quarterly in arrears depending on the type of borrowing. Including the effect of the interest rate swap agreements described in Note 11, "Derivative Instruments and Hedging Activities," the weighted average interest rates on borrowings outstanding under the Credit Agreement at both September 30, 2018 and December 31, 2017 was 2.2% . We also pay a commitment fee based on the average daily unused amount of the revolving credit facilities. The commitment fee is subject to change in increments of 0.025% and 0.05% depending on our net leverage ratio. In addition, we pay a participation commission on outstanding letters of credit at an applicable rate based on our net leverage ratio, and a fronting fee of 0.125% to the issuing bank, which are due quarterly in arrears. Of the total borrowings outstanding under the Credit Agreement, there were no borrowings classified as current maturities at September 30, 2018 compared to $18 million at December 31, 2017. As of September 30, 2018, there were letters of credit outstanding in the aggregate amount of $65 million . The amounts available under the revolving credit facilities are reduced by the amounts outstanding under letters of credit, and thus availability under the revolving credit facilities at September 30, 2018 was $1.5 billion . Related to the execution of Amendment No. 2 to the Fourth Amended and Restated Credit Agreement in December 2017, we incurred $5 million of fees, the majority of which were capitalized as an offset to Long-Term Obligations and are amortized over the term of the agreement. U.S. Notes (2023) In 2013, we issued $600 million aggregate principal amount of 4.75% senior notes due 2023 (the "U.S. Notes (2023)"). The U.S. Notes (2023) are governed by the Indenture dated as of May 9, 2013 (the "U.S. Notes (2023) Indenture") among LKQ Corporation, certain of our subsidiaries (the "Guarantors"), the trustee, paying agent, transfer agent and registrar. The U.S. Notes (2023) are registered under the Securities Act of 1933. The U.S. Notes (2023) bear interest at a rate of 4.75% per year from the most recent payment date on which interest has been paid or provided for. Interest on the U.S. Notes (2023) is payable in arrears on May 15 and November 15 of each year. The U.S. Notes (2023) are fully and unconditionally guaranteed, jointly and severally, by the Guarantors. The U.S. Notes (2023) and the related guarantees are, respectively, LKQ Corporation's and each Guarantor's senior unsecured obligations and are subordinated to all of the Guarantors' existing and future secured debt to the extent of the assets securing that secured debt. In addition, the U.S. Notes (2023) are effectively subordinated to all of the liabilities of our subsidiaries that are not guaranteeing the U.S. Notes (2023) to the extent of the assets of those subsidiaries. Euro Notes (2024) On April 14, 2016, LKQ Italia Bondco S.p.A. (“LKQ Italia”), an indirect, wholly-owned subsidiary of LKQ Corporation, completed an offering of €500 million aggregate principal amount of senior notes due April 1, 2024 (the “Euro Notes (2024)”) in a private placement conducted pursuant to Regulation S and Rule 144A under the Securities Act of 1933. The proceeds from the offering were used to repay a portion of the revolver borrowings under the Credit Agreement and to pay related fees and expenses. The Euro Notes (2024) are governed by the Indenture dated as of April 14, 2016 (the “Euro Notes (2024) Indenture”) among LKQ Italia, LKQ Corporation and certain of our subsidiaries (the “Euro Notes (2024) Subsidiaries”), the trustee, and the paying agent, transfer agent, and registrar. The Euro Notes (2024) bear interest at a rate of 3.875% per year from the date of original issuance or from the most recent payment date on which interest has been paid or provided for. Interest on the Euro Notes (2024) is payable in arrears on April 1 and October 1 of each year. The Euro Notes (2024) are fully and unconditionally guaranteed by LKQ Corporation and the Euro Notes (2024) Subsidiaries (the "Euro Notes (2024) Guarantors"). The Euro Notes (2024) and the related guarantees are, respectively, LKQ Italia’s and each Euro Notes (2024) Guarantor’s senior unsecured obligations and are subordinated to all of LKQ Italia's and the Euro Notes (2024) Guarantors’ existing and future secured debt to the extent of the assets securing that secured debt. In addition, the Euro Notes (2024) are effectively subordinated to all of the liabilities of our subsidiaries that are not guaranteeing the Euro Notes (2024) to the extent of the assets of those subsidiaries. The Euro Notes (2024) have been listed on the ExtraMOT, Professional Segment of the Borsa Italia S.p.A. securities exchange and the Global Exchange Market of Euronext Dublin. Euro Notes (2026/28) On April 9, 2018, LKQ European Holdings B.V. ("LKQ Euro Holdings"), a wholly-owned subsidiary of LKQ Corporation, completed an offering of €1.0 billion aggregate principal amount of senior notes. The offering consisted of €750 million senior notes due 2026 (the "2026 notes") and €250 million senior notes due 2028 (the "2028 notes" and, together with the 2026 notes, the "Euro Notes (2026/28)") in a private placement conducted pursuant to Regulation S and Rule 144A under the Securities Act of 1933. The proceeds from the offering, together with borrowings under our senior secured credit facility, were or will be used to (i) finance a portion of the consideration paid for the Stahlgruber acquisition, (ii) for general corporate purposes and (iii) to pay related fees and expenses, including the refinancing of net financial debt. The Euro Notes (2026/28) are governed by the Indenture dated as of April 9, 2018 (the “Euro Notes (2026/28) Indenture”) among LKQ Euro Holdings, LKQ Corporation and certain of our subsidiaries (the “Euro Notes (2026/28) Subsidiaries”), the trustee, paying agent, transfer agent, and registrar. The 2026 notes and 2028 notes bear interest at a rate of 3.625% and 4.125% , respectively, per year from the date of original issuance or from the most recent payment date on which interest has been paid or provided for. Interest on the Euro Notes (2026/28) is payable in arrears on April 1 and October 1 of each year, beginning on October 1, 2018. The Euro Notes (2026/28) are fully and unconditionally guaranteed by LKQ Corporation and the Euro Notes (2026/28) Subsidiaries (the "Euro Notes (2026/28) Guarantors"). The Euro Notes (2026/28) and the related guarantees are, respectively, LKQ Euro Holdings' and each Euro Notes (2026/28) Guarantor’s senior unsecured obligations and will be subordinated to all of LKQ Euro Holdings' and the Euro Notes (2026/28) Guarantors’ existing and future secured debt to the extent of the assets securing that secured debt. In addition, the Euro Notes (2026/28) are effectively subordinated to all of the liabilities of our subsidiaries that are not guaranteeing the Euro Notes (2026/28) to the extent of the assets of those subsidiaries. The Euro Notes (2026/28) have been listed on the Global Exchange Market of Euronext Dublin. Related to the execution of the Euro Notes (2026/28) in April 2018, we incurred $16 million of fees, which were capitalized as an offset to Long-Term Obligations and are amortized over the term of the Euro Notes (2026/28). Receivables Securitization Facility On November 29, 2016, we amended the terms of our receivables securitization facility with The Bank of Tokyo-Mitsubishi UFJ, LTD. ("BTMU") to: (i) extend the term of the facility to November 8, 2019; (ii) increase the maximum amount available to $100 million ; and (iii) make other clarifying and updating changes. Under the facility, LKQ sells an ownership interest in certain receivables, related collections and security interests to BTMU for the benefit of conduit investors and/or financial institutions for cash proceeds. Upon payment of the receivables by customers, rather than remitting to BTMU the amounts collected, LKQ retains such collections as proceeds for the sale of new receivables generated by certain of the ongoing operations of the Company. The sale of the ownership interest in the receivables is accounted for as a secured borrowing in our Consolidated Balance Sheets, under which the receivables included in the program collateralize the amounts invested by BTMU, the conduit investors and/or financial institutions (the "Purchasers"). The receivables are held by LKQ Receivables Finance Company, LLC ("LRFC"), a wholly owned bankruptcy-remote special purpose subsidiary of LKQ, and therefore, the receivables are available first to satisfy the creditors of LRFC, including the Purchasers. Net receivables totaling $127 million and $144 million were collateral for the investment under the receivables facility as of September 30, 2018 and December 31, 2017, respectively. Under the receivables facility, we pay variable interest rates plus a margin on the outstanding amounts invested by the Purchasers. The variable rates are based on (i) commercial paper rates, (ii) the London InterBank Offered Rate ("LIBOR"), or (iii) base rates, and are payable monthly in arrears. The commercial paper rate is the applicable variable rate unless conduit investors are not available to invest in the receivables at commercial paper rates. In such case, financial institutions will invest at the LIBOR rate or at base rates. We also pay a commitment fee on the excess of the investment maximum over the average daily outstanding investment, payable monthly in arrears. As of September 30, 2018, the interest rate under the receivables facility was based on commercial paper rates and was 3.1% . The outstanding balances of $100 million as of both September 30, 2018 and December 31, 2017 were classified as long-term on the Unaudited Condensed Consolidated Balance Sheets because we have the ability and intent to refinance these borrowings on a long-term basis.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Notes)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative Instruments and Hedging Activities We are exposed to market risks, including the effect of changes in interest rates, foreign currency exchange rates and commodity prices. Under our current policies, we use derivatives to manage our exposure to variable interest rates on our senior secured debt and changing foreign exchange rates for certain foreign currency denominated transactions. We do not hold or issue derivatives for trading purposes. Cash Flow Hedges We hold interest rate swap agreements to hedge a portion of the variable interest rate risk on our variable rate borrowings under our Credit Agreement, with the objective of minimizing the impact of interest rate fluctuations and stabilizing cash flows. Under the terms of the interest rate swap agreements, we pay the fixed interest rate and receive payment at a variable rate of interest based on LIBOR for the respective currency of each interest rate swap agreement’s notional amount. The effective portion of changes in the fair value of the interest rate swap agreements is recorded in Accumulated Other Comprehensive Income (Loss) and is reclassified to interest expense when the underlying interest payment has an impact on earnings. The ineffective portion of changes in the fair value of the interest rate swap agreements is reported in interest expense. Our interest rate swap contracts have maturity dates ranging from January to June 2021. As of September 30, 2018 , we held interest rate swap contracts representing $590 million of U.S. dollar-denominated debt. From time to time, we may hold foreign currency forward contracts related to certain foreign currency denominated intercompany transactions, with the objective of minimizing the impact of fluctuating exchange rates on these future cash flows. Under the terms of the foreign currency forward contracts, we will sell the foreign currency in exchange for U.S. dollars at a fixed rate on the maturity dates of the contracts. The effective portion of the changes in fair value of the foreign currency forward contracts is recorded in Accumulated Other Comprehensive Income (Loss) and reclassified to other income, net when the underlying transaction has an impact on earnings. In 2016, we entered into three cross currency swap agreements for a total notional amount of $422 million ( €400 million ). The notional amount steps down by €15 million annually through 2020 with the remainder maturing in January 2021. These cross currency swaps contain an interest rate swap component and a foreign currency forward contract component that, combined with related intercompany financing arrangements, effectively convert variable rate U.S. dollar-denominated borrowings into fixed rate euro-denominated borrowings. The swaps are intended to minimize the impact of fluctuating exchange rates and interest rates on the cash flows resulting from the related intercompany financing arrangements. The effective portion of the changes in the fair value of the derivative instruments is recorded in Accumulated Other Comprehensive Income (Loss) and is reclassified to interest expense, net when the underlying transactions have an impact on earnings. In October 2018, we entered into two cross currency swap agreements for a total notional amount of $184 million ( €160 million ). Half of the notional amount matures in October 2019 with the remainder in October 2020. The purpose and accounting of the swaps are similar to those described in the previous paragraph. The activity related to our cash flow hedges is presented in operating activities in our Unaudited Condensed Consolidated Statements of Cash Flows. The following table summarizes the notional amounts and fair values of our designated cash flow hedges as of September 30, 2018 and December 31, 2017 (in thousands): Notional Amount Fair Value at September 30, 2018 (USD) Fair Value at December 31, 2017 (USD) September 30, 2018 December 31, 2017 Other Assets Other Noncurrent Liabilities Other Assets Other Noncurrent Liabilities Interest rate swap agreements USD denominated $ 590,000 $ 590,000 $ 25,719 $ — $ 19,102 $ — Cross currency swap agreements USD/euro $ 394,649 $ 406,546 10,881 49,212 5,504 61,492 Total cash flow hedges $ 36,600 $ 49,212 $ 24,606 $ 61,492 While certain derivative instruments executed with the same counterparty are subject to master netting arrangements, we present our cash flow hedge derivative instruments on a gross basis in our Unaudited Condensed Consolidated Balance Sheets. The impact of netting the fair values of these contracts would result in a decrease to Other Assets and Other Noncurrent Liabilities on our Unaudited Condensed Consolidated Balance Sheets of $19 million and $12 million at September 30, 2018 and December 31, 2017 , respectively. The activity related to our cash flow hedges is included in Note 9, "Accumulated Other Comprehensive Income (Loss) ." Ineffectiveness related to our cash flow hedges was immaterial to our results of operations during each of the three and nine months ended September 30, 2018 and 2017 . We do not expect future ineffectiveness related to our cash flow hedges to have a material effect on our results of operations. As of September 30, 2018 , we estimate that $4 million of derivative gains (net of tax) included in Accumulated Other Comprehensive Income (Loss) will be reclassified into our Unaudited Condensed Consolidated Statements of Income within the next 12 months. Other Derivative Instruments During the third quarter of 2018, we recorded the fair value of a derivative instrument of $29 million in Other assets on our Unaudited Condensed Consolidated Balance Sheets related to our right to acquire Mekonomen shares at a discount. We are measuring the derivative instrument at fair value, and we recorded a $3 million gain on our fair value remeasurement during the three months ended September 30, 2018; the gain is recorded in Other income, net on the Unaudited Condensed Consolidated Statements of Income. In the fourth quarter, we will record an $8 million loss related to the settlement of the derivative instrument in October 2018 due to a decrease in the Mekonomen share price from the last day of the third quarter to the settlement date. Refer to Note 4, "Financial Statement Information," for more information on the derivative instrument. We hold other short-term derivative instruments, including foreign currency forward contracts, to manage our exposure to variability related to inventory purchases and intercompany financing transactions denominated in a non-functional currency. We have elected not to apply hedge accounting for these transactions, and therefore the contracts are adjusted to fair value through our results of operations as of each balance sheet date, which could result in volatility in our earnings. The notional amount and fair value of these contracts at September 30, 2018 and December 31, 2017, along with the effect on our results of operations during each of the three and nine months ended September 30, 2018 and 2017 , were immaterial.

Fair Value Disclosures (Notes)

Fair Value Disclosures (Notes)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value Measurements Financial Assets and Liabilities Measured at Fair Value We use the market and income approaches to estimate the fair value of our financial assets and liabilities, and during the three and nine months ended September 30, 2018, there were no significant changes in valuation techniques or inputs related to the financial assets or liabilities that we have historically recorded at fair value. The tiers in the fair value hierarchy include: Level 1, defined as observable inputs such as quoted market prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as significant unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The following tables present information about our financial assets and liabilities measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation inputs we utilized to determine such fair value as of September 30, 2018 and December 31, 2017 (in thousands): Balance as of September 30, 2018 Fair Value Measurements as of September 30, 2018 Level 1 Level 2 Level 3 Assets: Cash surrender value of life insurance $ 53,691 $ — $ 53,691 $ — Rights to acquire Mekonomen shares 28,683 — 28,683 — Interest rate swaps 25,719 — 25,719 — Cross currency swap agreements 10,881 — 10,881 — Total Assets $ 118,974 $ — $ 118,974 $ — Liabilities: Contingent consideration liabilities $ 5,243 $ — $ — $ 5,243 Deferred compensation liabilities 54,419 — 54,419 — Cross currency swap agreements 49,212 — 49,212 — Total Liabilities $ 108,874 $ — $ 103,631 $ 5,243 Balance as of December 31, 2017 Fair Value Measurements as of December 31, 2017 Level 1 Level 2 Level 3 Assets: Cash surrender value of life insurance $ 45,984 $ — $ 45,984 $ — Interest rate swaps 19,102 — 19,102 — Cross currency swap agreements 5,504 — 5,504 — Total Assets $ 70,590 $ — $ 70,590 $ — Liabilities: Contingent consideration liabilities $ 2,636 $ — $ — $ 2,636 Deferred compensation liabilities 47,199 — 47,199 — Cross currency swap agreements 61,492 — 61,492 — Total Liabilities $ 111,327 $ — $ 108,691 $ 2,636 The cash surrender value of life insurance and the derivative instrument related to Mekonomen are both included in Other assets on our Unaudited Condensed Consolidated Balance Sheets. The current portion of deferred compensation is included in Accrued payroll-related liabilities and the current portion of contingent consideration liabilities is included in Other current liabilities on our Unaudited Condensed Consolidated Balance Sheets; the noncurrent portion of these amounts is included in Other noncurrent liabilities on our Unaudited Condensed Consolidated Balance Sheets based on the expected timing of the related payments. The balance sheet classification of the interest rate swaps and cross currency swap agreements is presented in Note 11, "Derivative Instruments and Hedging Activities." Our Level 2 assets and liabilities are valued using inputs from third parties and market observable data. We obtain valuation data for the cash surrender value of life insurance and deferred compensation liabilities from third party sources, which determine the net asset values for our accounts using quoted market prices, investment allocations and reportable trades. We valued the rights to acquire Mekonomen shares using the Mekonomen share price as of the last day of the period and the discounted share price under the rights issue. We value our other derivative instruments using a third party valuation model that performs a discounted cash flow analysis based on the terms of the contracts and market observable inputs such as current and forward interest rates and current and forward foreign exchange rates. Our contingent consideration liabilities are related to our business acquisitions. Under the terms of the contingent consideration agreements, payments may be made at specified future dates depending on the performance of the acquired business subsequent to the acquisition. The liabilities for these payments are classified as Level 3 liabilities because the related fair value measurement, which is determined using an income approach, includes significant inputs not observable in the market. Financial Assets and Liabilities Not Measured at Fair Value Our debt is reflected on the Unaudited Condensed Consolidated Balance Sheets at cost. Based on market conditions as of September 30, 2018 and December 31, 2017, the fair value of our credit agreement borrowings reasonably approximated the carrying values of $1.8 billion and $2.0 billion , respectively. In addition, based on market conditions, the fair values of the outstanding borrowings under the receivables facility reasonably approximated the carrying values of $100 million at both September 30, 2018 and December 31, 2017. As of September 30, 2018 and December 31, 2017, the fair values of the U.S. Notes (2023) were approximately $601 million and $615 million , respectively, compared to a carrying value of $600 million . As of September 30, 2018 and December 31, 2017, the fair values of the Euro Notes (2024) were approximately $615 million and $658 million compared to carrying values of $580 million and $600 million , respectively. As of September 30, 2018, the fair value of the Euro Notes (2026/28) approximated the carrying value of $ 1.2 billion . The fair value measurements of the borrowings under our credit agreement and receivables facility are classified as Level 2 within the fair value hierarchy since they are determined based upon significant inputs observable in the market, including interest rates on recent financing transactions with similar terms and maturities. We estimated the fair value by calculating the upfront cash payment a market participant would require at September 30, 2018 to assume these obligations. The fair value of our U.S. Notes (2023) is classified as Level 1 within the fair value hierarchy since it is determined based upon observable market inputs including quoted market prices in an active market. The fair values of our Euro Notes (2024) and Euro Notes (2026/28) are determined based upon observable market inputs including quoted market prices in markets that are not active, and therefore are classified as Level 2 within the fair value hierarchy.

Income Taxes (Notes)

Income Taxes (Notes)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes At the end of each interim period, we estimate our annual effective tax rate and apply that rate to our interim earnings. We also record the tax impact of certain unusual or infrequently occurring items, including changes in judgment about valuation allowances and the effects of changes in tax laws or rates, in the interim period in which they occur. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the expected operating income for the year, projections of the proportion of income earned and taxed in state and foreign jurisdictions, permanent and temporary differences between book and taxable income, and the likelihood of recovering deferred tax assets generated in the current year. The accounting estimates used to compute the provision for income taxes may change as new events occur, additional information is obtained or as the tax environment changes. Our effective income tax rate for the nine months ended September 30, 2018 was 25.2% , compared to 33.5% for the comparable prior year period. The decrease was primarily attributable to the reduction of the U.S. federal statutory income tax rate from 35% to 21% as a result of the enactment of the Tax Act in December 2017. Partially offsetting this decrease was a 1.0% increase in the effective income tax rate as a result of the Stahlgruber acquisition, including non-deductible interest and acquisition related expenses, as well as the higher effective tax rate in Germany. The effective tax rate also reflects the impact of net favorable discrete items of approximately $12 million and $8 million for the nine months ended September 30, 2018 and 2017, respectively. The net favorable discrete items are primarily composed of a $10 million favorable adjustment to the Tax Act transition tax for the nine months ended September 30, 2018, as well as $4 million and $7 million for the nine months ended September 30, 2018 and 2017, respectively, for excess tax benefits from stock-based payments. The year over year change in discrete items decreased the effective tax rate by 0.6% compared to the prior year. Our acquisition of Stahlgruber in May 2018 contributed $98 million of deferred tax liabilities relating to intangible assets; property, plant and equipment; and reserves, including pension and other post-retirement benefit obligations. The Tax Act introduced broad and complex changes to the U.S. tax code, including the aforementioned reduction in the U.S. corporate tax rate, a one-time transition tax on the historical unremitted earnings of foreign subsidiaries, and a new minimum tax on foreign earnings (Global Intangible Low-Taxed Income, “GILTI”). On December 22, 2017, the SEC staff issued Staff Accounting Bulletin 118 ("SAB 118"), which provides guidance on accounting for the tax effects of the Tax Act. SAB 118 provides a measurement period that should not extend beyond one year from the Tax Act enactment date for companies to complete the related accounting for provisional amounts under ASC 740, "Accounting for Income Taxes." As a result of the Tax Act, in 2017, we recognized a provisional tax liability of $51 million related to the one-time transition tax on historical foreign earnings, payable over a period of eight years. We also recorded a provisional decrease to net U.S. deferred tax liabilities of $73 million . For a description of the impact of the Tax Act for the year ended December 31, 2017, refer to Note 13, "Income Taxes" of our financial statements as of and for the year ended December 31, 2017 included in the 2017 Form 10-K. During the nine-month period ended September 30, 2018, we recorded a $10 million favorable adjustment to the provisional amount recognized in 2017 related to the transition tax. We continue to gather the information necessary to finalize the provisional amounts. Our estimates could be affected as we gain a more thorough understanding of the Tax Act from additional guidance issued by the U.S. tax authorities. Changes to the provisional estimates of the tax effect of the Tax Act will be recorded as a discrete item in the interim period the amounts are considered complete. The Company has included the estimated 2018 impact of the GILTI Tax as a period cost and included it as part of the estimated annual effective tax rate. The 2018 estimated annual effective tax rate also includes the impact of all other U.S. tax reform provisions that were effective on January 1, 2018. These estimates are subject to change as additional guidance on the tax reform provisions is issued.

Employee Benefit Plans (Notes)

Employee Benefit Plans (Notes)	9 Months Ended
	Sep. 30, 2018
Retirement Benefits [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	Employee Benefit Plans We have funded and unfunded defined benefit plans covering certain employee groups in the U.S. and various European countries. The defined benefit plans are generally frozen to new participants and, in some cases, existing participants no longer accrue benefits. As of September 30, 2018 and December 31, 2017, the aggregate funded status of the defined benefit plans was a liability of $111 million and $46 million , respectively, and is reported in Other noncurrent liabilities and Accrued payroll-related liabilities on our Unaudited Condensed Consolidated Balance Sheets. Of the liability at September 30, 2018, $75 million was related to our acquisition of Stahlgruber on May 30, 2018. Net periodic benefit expense for our defined benefit plans included the following components for the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Service cost $ 628 $ 1,126 $ 1,612 $ 2,902 Interest cost 996 750 2,442 2,091 Expected return on plan assets (720 ) (507 ) (2,220 ) (1,059 ) Amortization of prior service credit — (71 ) — (201 ) Amortization of actuarial (gain) loss 21 (129 ) 97 (720 ) Net periodic benefit expense $ 925 $ 1,169 $ 1,931 $ 3,013 For the three and nine months ended September 30, 2018, the service cost component of net periodic benefit expense was classified in Selling, general and administrative expenses, while the other components of net periodic benefit expense were classified in Other income, net in our Unaudited Condensed Consolidated Statements of Income. For the three and nine months ended September 30, 2017, all components of net periodic benefit expense were included in Selling, general, and administrative expenses in our Unaudited Condensed Consolidated Statements of Income. During the nine months ended September 30, 2018 , we contributed $12 million to our pension plans. We estimate that contributions to our pension plans during the last three months of 2018 will be $1 million .

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases We are obligated under noncancelable operating leases for corporate office space, warehouse and distribution facilities, trucks and certain equipment. The future minimum lease commitments under these leases at September 30, 2018 are as follows (in thousands): Three months ending December 31, 2018 $ 72,780 Years ending December 31: 2019 271,642 2020 226,936 2021 179,921 2022 144,700 2023 122,149 Thereafter 689,583 Future Minimum Lease Payments $ 1,707,711 Litigation and Related Contingencies We have certain contingencies resulting from litigation, claims and other commitments and are subject to a variety of environmental and pollution control laws and regulations incident to the ordinary course of business. We currently expect that the resolution of such contingencies will not materially affect our financial position, results of operations or cash flows.

Segment and Geographic Informat

Segment and Geographic Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment and Geographic Information	Segment and Geographic Information We have four operating segments: Wholesale – North America, Europe, Specialty and Self Service. Our Wholesale – North America and Self Service operating segments are aggregated into one reportable segment, North America, because they possess similar economic characteristics and have common products and services, customers, and methods of distribution. Our reportable segments are organized based on a combination of geographic areas served and type of product lines offered. The reportable segments are managed separately as each business serves different customers (i.e. geographic in the case of North America and Europe and product type in the case of Specialty) and is affected by different economic conditions. Therefore, we present three reportable segments: North America, Europe and Specialty. The following tables present our financial performance by reportable segment for the periods indicated (in thousands): North America Europe Specialty Eliminations Consolidated Three Months Ended September 30, 2018 Revenue: Third Party $ 1,262,657 $ 1,470,856 $ 388,865 $ — $ 3,122,378 Intersegment 142 — 1,196 (1,338 ) — Total segment revenue $ 1,262,799 $ 1,470,856 $ 390,061 $ (1,338 ) $ 3,122,378 Segment EBITDA $ 154,049 $ 129,358 $ 42,937 $ — $ 326,344 Depreciation and amortization (1) 22,151 52,139 7,183 — 81,473 Three Months Ended September 30, 2017 Revenue: Third Party $ 1,181,756 $ 954,522 $ 329,522 $ — $ 2,465,800 Intersegment 187 — 1,072 (1,259 ) — Total segment revenue $ 1,181,943 $ 954,522 $ 330,594 $ (1,259 ) $ 2,465,800 Segment EBITDA $ 152,627 $ 79,294 $ 35,114 $ — $ 267,035 Depreciation and amortization (1) 22,104 32,326 5,472 — 59,902 North America Europe Specialty Eliminations Consolidated Nine Months Ended September 30, 2018 Revenue: Third Party $ 3,927,282 $ 3,795,439 $ 1,151,172 $ — $ 8,873,893 Intersegment 526 — 3,554 (4,080 ) — Total segment revenue $ 3,927,808 $ 3,795,439 $ 1,154,726 $ (4,080 ) $ 8,873,893 Segment EBITDA $ 506,772 $ 315,785 $ 140,974 $ — $ 963,531 Depreciation and amortization (1) 64,985 124,697 21,295 — 210,977 Nine Months Ended September 30, 2017 Revenue: Third Party $ 3,596,108 $ 2,665,170 $ 1,005,776 $ — $ 7,267,054 Intersegment 589 — 3,222 (3,811 ) — Total segment revenue $ 3,596,697 $ 2,665,170 $ 1,008,998 $ (3,811 ) $ 7,267,054 Segment EBITDA $ 502,494 $ 241,537 $ 119,133 $ — $ 863,164 Depreciation and amortization (1) 64,305 85,809 16,394 — 166,508 (1) Amounts presented include depreciation and amortization expense recorded within cost of goods sold. The key measure of segment profit or loss reviewed by our chief operating decision maker, who is our Chief Executive Officer, is Segment EBITDA. Segment EBITDA includes revenue and expenses that are controllable by the segment. Corporate general and administrative expenses are allocated to the segments based on usage, with shared expenses apportioned based on the segment's percentage of consolidated revenue. We calculate Segment EBITDA as EBITDA excluding restructuring and acquisition related expenses, change in fair value of contingent consideration liabilities, other gains and losses related to acquisitions, equity method investments, or divestitures and equity in losses and earnings of unconsolidated subsidiaries. EBITDA, which is the basis for Segment EBITDA, is calculated as net income excluding noncontrolling interest, discontinued operations, depreciation, amortization, interest and income tax expense. The table below provides a reconciliation of Net Income to Segment EBITDA (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Net income $ 134,480 $ 122,381 $ 445,109 $ 409,573 Less: net income attributable to noncontrolling interest 378 — 1,040 — Net income attributable to LKQ stockholders 134,102 122,381 444,069 409,573 Subtract: Net loss from discontinued operations — — — (4,531 ) Net income from continuing operations attributable to LKQ stockholders 134,102 122,381 444,069 414,104 Add: Depreciation and amortization 76,701 56,877 196,322 159,178 Depreciation and amortization - cost of goods sold 4,772 3,025 14,655 7,330 Interest expense, net 40,860 25,222 107,647 73,806 Provision for income taxes 46,068 58,189 156,427 206,206 EBITDA 302,503 265,694 919,120 860,624 Subtract: Equity in (losses) earnings of unconsolidated subsidiaries (1) (20,284 ) 2,673 (18,326 ) 3,878 Fair value gain on Mekonomen derivative instrument (1) 2,509 — 2,509 — Gains on bargain purchases (2) — 913 328 3,990 Add: Restructuring and acquisition related expenses (3) 6,614 4,922 26,546 10,371 Inventory step-up adjustment - acquisition related — — 403 — Impairment of net assets held for sale — — 2,438 — Change in fair value of contingent consideration liabilities (548 ) 5 (465 ) 37 Segment EBITDA $ 326,344 $ 267,035 $ 963,531 $ 863,164 (1) See Note 4, "Financial Statement Information," for further information. (2) Reflects the gains on bargain purchases related to our acquisitions of a wholesale business in Europe and Andrew Page. See Note 2, "Business Combinations," for further information. (3) See Note 6, "Restructuring and Acquisition Related Expenses," for further information. The following table presents capital expenditures by reportable segment (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Capital Expenditures North America $ 27,996 $ 31,021 $ 86,864 $ 69,934 Europe 23,904 12,119 69,582 55,253 Specialty 4,442 852 15,317 6,752 Discontinued operations — — — 3,598 Total capital expenditures $ 56,342 $ 43,992 $ 171,763 $ 135,537 The following table presents assets by reportable segment (in thousands): September 30, December 31, 2018 2017 Receivables, net North America $ 437,429 $ 379,666 Europe (1) 696,106 555,372 Specialty 122,341 92,068 Total receivables, net (2) 1,255,876 1,027,106 Inventories North America 1,058,310 1,076,393 Europe (1) 1,391,578 964,068 Specialty 345,006 340,322 Total inventories 2,794,894 2,380,783 Property, Plant and Equipment, net North America 560,918 537,286 Europe (1) 554,550 293,539 Specialty 85,535 82,264 Total property, plant and equipment, net 1,201,003 913,089 Equity Method Investments North America 16,075 336 Europe (3) 141,334 208,068 Total equity method investments 157,409 208,404 Other unallocated assets 6,176,154 4,837,490 Total assets $ 11,585,336 $ 9,366,872 (1) The increase in assets for the Europe segment is primarily attributable to the Stahlgruber acquisition. Refer to Note 2, “Business Combinations,” for further detail on the opening balance sheet amounts. (2) Refer to Note 4, "Financial Statement Information," for the increase in total receivables, net compared to December 31, 2017 as a result of the adoption of ASC 606. (3) Refer to Note 4, "Financial Statement Information," for further information. We report net receivables; inventories; net property , plant and equipment; and equity method investments by segment as that information is used by the chief operating decision maker in assessing segment performance. These assets provide a measure for the operating capital employed in each segment. Unallocated assets include cash and cash equivalents, prepaid and other current and noncurrent assets, goodwill and other intangibles. Our largest countries of operation are the U.S., followed by the U.K. and Germany. Our other European operations are located in the Netherlands, Belgium, Italy, Czech Republic, Austria, Poland, Slovakia and other European countries. Our operations in other countries include operations in Canada, engine remanufacturing and bumper refurbishing operations in Mexico, an aftermarket parts freight consolidation warehouse in Taiwan, and administrative support functions in India. Our net sales are attributed to geographic area based on the location of the selling operation. The following table sets forth our revenue by geographic area (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Revenue United States $ 1,535,557 $ 1,395,495 $ 4,716,927 $ 4,268,600 United Kingdom 408,474 399,155 1,294,155 1,171,829 Germany 415,748 549 564,698 862 Other countries 762,599 670,601 2,298,113 1,825,763 Total revenue $ 3,122,378 $ 2,465,800 $ 8,873,893 $ 7,267,054 The following table sets forth our tangible long-lived assets by geographic area (in thousands): September 30, December 31, 2018 2017 Long-lived Assets United States $ 609,562 $ 583,236 Germany 210,344 41 United Kingdom 170,940 178,021 Other countries 210,157 151,791 Total long-lived assets $ 1,201,003 $ 913,089

Subsequent Events (Notes)

Subsequent Events (Notes)	3 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Event On October 25, 2018, we announced that our Board of Directors authorized a stock repurchase program under which we may purchase up to $500 million of our common stock from time to time through October 25, 2021. Repurchases under the program may be made in the open market or in privately negotiated transactions, with the amount and timing of repurchases depending on market conditions and corporate needs. The repurchase program does not obligate us to acquire any specific number of shares and may be suspended or discontinued at any time.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	9 Months Ended
	Sep. 30, 2018
Condensed Consolidating Financial Information [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information LKQ Corporation (the "Parent") issued, and the Guarantors have fully and unconditionally guaranteed, jointly and severally, the U.S. Notes (2023) due on May 15, 2023. A Guarantor's guarantee will be unconditionally and automatically released and discharged upon the occurrence of any of the following events: (i) a transfer (including as a result of consolidation or merger) by the Guarantor to any person that is not a Guarantor of all or substantially all assets and properties of such Guarantor, provided the Guarantor is also released from its obligations with respect to indebtedness under the Credit Agreement or other indebtedness of ours, which obligation gave rise to the guarantee of the U.S. Notes (2023); (ii) a transfer (including as a result of consolidation or merger) to any person that is not a Guarantor of the equity interests of a Guarantor or issuance by a Guarantor of its equity interests such that the Guarantor ceases to be a subsidiary, as defined in the U.S. Notes (2023) Indenture, provided the Guarantor is also released from its obligations with respect to indebtedness under the Credit Agreement or other indebtedness of ours, which obligation gave rise to the guarantee of the U.S. Notes (2023); (iii) the release of the Guarantor from its obligations with respect to indebtedness under the Credit Agreement or other indebtedness of ours, which obligation gave rise to the guarantee of the U.S. Notes (2023); and (iv) upon legal defeasance, covenant defeasance or satisfaction and discharge of the U.S. Notes (2023) Indenture, as defined in the U.S. Notes (2023) Indenture. Presented below are the unaudited condensed consolidating financial statements of the Parent, the Guarantors, the non-guarantor subsidiaries (the "Non-Guarantors"), and the elimination entries necessary to present our financial statements on a consolidated basis as required by Rule 3-10 of Regulation S-X of the Securities Exchange Act of 1934 resulting from the guarantees of the U.S. Notes (2023). Investments in consolidated subsidiaries have been presented under the equity method of accounting. The principal elimination entries eliminate investments in subsidiaries, intercompany balances, and intercompany revenue and expenses. The unaudited condensed consolidating financial statements below have been prepared from our financial information on the same basis of accounting as the unaudited condensed consolidated financial statements, and may not necessarily be indicative of the financial position, results of operations or cash flows had the Parent, Guarantors and Non-Guarantors operated as independent entities. LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Three Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 1,550,301 $ 1,609,525 $ (37,448 ) $ 3,122,378 Cost of goods sold — 934,913 1,027,715 (37,448 ) 1,925,180 Gross margin — 615,388 581,810 — 1,197,198 Selling, general and administrative expenses 6,725 434,965 437,460 — 879,150 Restructuring and acquisition related expenses — 1,638 4,976 — 6,614 Depreciation and amortization 34 25,238 51,429 — 76,701 Operating (loss) income (6,759 ) 153,547 87,945 — 234,733 Other expense (income): Interest expense (income), net 16,191 (193 ) 24,862 — 40,860 Intercompany interest (income) expense, net (15,121 ) 10,014 5,107 — — Other income, net (178 ) (3,514 ) (3,267 ) — (6,959 ) Total other expense, net 892 6,307 26,702 — 33,901 (Loss) income before (benefit) provision for income taxes (7,651 ) 147,240 61,243 — 200,832 (Benefit) provision for income taxes (12,008 ) 41,875 16,201 — 46,068 Equity in losses of unconsolidated subsidiaries — (156 ) (20,128 ) — (20,284 ) Equity in earnings of subsidiaries 129,745 4,467 — (134,212 ) — Net income 134,102 109,676 24,914 (134,212 ) 134,480 Less: net income attributable to noncontrolling interest — — 378 — 378 Net income attributable to LKQ stockholders $ 134,102 $ 109,676 $ 24,536 $ (134,212 ) $ 134,102 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Three Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 1,433,742 $ 1,069,682 $ (37,624 ) $ 2,465,800 Cost of goods sold — 861,078 685,470 (37,624 ) 1,508,924 Gross margin — 572,664 384,212 — 956,876 Selling, general and administrative expenses 7,861 394,926 293,191 — 695,978 Restructuring and acquisition related expenses — 1,473 3,449 — 4,922 Depreciation and amortization 29 25,005 31,843 — 56,877 Operating (loss) income (7,890 ) 151,260 55,729 — 199,099 Other expense (income): Interest expense, net 16,232 57 8,933 — 25,222 Intercompany interest (income) expense, net (2,389 ) (2,814 ) 5,203 — — Gain on bargain purchase — — (913 ) — (913 ) Other expense (income), net 32 (4,011 ) 872 — (3,107 ) Total other expense (income), net 13,875 (6,768 ) 14,095 — 21,202 (Loss) income before (benefit) provision for income taxes (21,765 ) 158,028 41,634 — 177,897 (Benefit) provision for income taxes (8,436 ) 56,920 9,705 — 58,189 Equity in earnings of unconsolidated subsidiaries — — 2,673 — 2,673 Equity in earnings of subsidiaries 135,710 6,674 — (142,384 ) — Net income $ 122,381 $ 107,782 $ 34,602 $ (142,384 ) $ 122,381 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 4,768,292 $ 4,216,417 $ (110,816 ) $ 8,873,893 Cost of goods sold — 2,869,499 2,702,162 (110,816 ) 5,460,845 Gross margin — 1,898,793 1,514,255 — 3,413,048 Selling, general and administrative expenses 25,538 1,292,455 1,154,092 — 2,472,085 Restructuring and acquisition related expenses — 1,968 24,578 — 26,546 Depreciation and amortization 84 74,102 122,136 — 196,322 Operating (loss) income (25,622 ) 530,268 213,449 — 718,095 Other expense (income): Interest expense (income), net 52,004 (94 ) 55,737 — 107,647 Intercompany interest (income) expense, net (45,927 ) 29,559 16,368 — — Gains on bargain purchases — — (328 ) — (328 ) Other (income) expense, net (1,076 ) (13,793 ) 5,783 — (9,086 ) Total other expense, net 5,001 15,672 77,560 — 98,233 (Loss) income before (benefit) provision for income taxes (30,623 ) 514,596 135,889 — 619,862 (Benefit) provision for income taxes (19,656 ) 141,295 34,788 — 156,427 Equity in losses of unconsolidated subsidiaries — (156 ) (18,170 ) — (18,326 ) Equity in earnings of subsidiaries 455,036 14,028 — (469,064 ) — Net income 444,069 387,173 82,931 (469,064 ) 445,109 Less: net income attributable to noncontrolling interest — — 1,040 — 1,040 Net income attributable to LKQ stockholders $ 444,069 $ 387,173 $ 81,891 $ (469,064 ) $ 444,069 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Nine Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 4,374,693 $ 3,001,386 $ (109,025 ) $ 7,267,054 Cost of goods sold — 2,613,540 1,910,561 (109,025 ) 4,415,076 Gross margin — 1,761,153 1,090,825 — 2,851,978 Selling, general and administrative expenses 26,209 1,165,897 810,959 — 2,003,065 Restructuring and acquisition related expenses — 4,010 6,361 — 10,371 Depreciation and amortization 89 73,072 86,017 — 159,178 Operating (loss) income (26,298 ) 518,174 187,488 — 679,364 Other expense (income): Interest expense, net 48,904 281 24,621 — 73,806 Intercompany interest (income) expense, net (10,221 ) (4,530 ) 14,751 — — Gains on bargain purchases — — (3,990 ) — (3,990 ) Other expense (income), net 286 (8,247 ) 1,077 — (6,884 ) Total other expense (income), net 38,969 (12,496 ) 36,459 — 62,932 (Loss) income from continuing operations before (benefit) provision for income taxes (65,267 ) 530,670 151,029 — 616,432 (Benefit) provision for income taxes (27,034 ) 200,321 32,919 — 206,206 Equity in earnings of unconsolidated subsidiaries — — 3,878 — 3,878 Equity in earnings of subsidiaries 452,337 17,282 — (469,619 ) — Income from continuing operations 414,104 347,631 121,988 (469,619 ) 414,104 Net (loss) income from discontinued operations (4,531 ) (4,531 ) 2,050 2,481 (4,531 ) Net income $ 409,573 $ 343,100 $ 124,038 $ (467,138 ) $ 409,573 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Comprehensive Income (In thousands) For the Three Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 134,102 $ 109,676 $ 24,914 $ (134,212 ) $ 134,480 Less: net income attributable to noncontrolling interest — — 378 — 378 Net income attributable to LKQ stockholders 134,102 109,676 24,536 (134,212 ) 134,102 Other comprehensive (loss) income: Foreign currency translation, net of tax (20,951 ) 1,686 (23,901 ) 22,215 (20,951 ) Net change in unrealized gains/losses on cash flow hedges, net of tax 304 — — — 304 Net change in unrealized gains/losses on pension plans, net of tax 1,274 1,246 28 (1,274 ) 1,274 Net change in other comprehensive income from unconsolidated subsidiaries 643 — 643 (643 ) 643 Other comprehensive (loss) income (18,730 ) 2,932 (23,230 ) 20,298 (18,730 ) Comprehensive income 115,372 112,608 1,684 (113,914 ) 115,750 Less: comprehensive income attributable to noncontrolling interest — — 378 — 378 Comprehensive income attributable to LKQ stockholders $ 115,372 $ 112,608 $ 1,306 $ (113,914 ) $ 115,372 For the Three Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 122,381 $ 107,782 $ 34,602 $ (142,384 ) $ 122,381 Other comprehensive income (loss): Foreign currency translation, net of tax 59,618 3,590 62,734 (66,324 ) 59,618 Net change in unrecognized gains/losses on cash flow hedges, net of tax (1,776 ) — — — (1,776 ) Net change in unrealized gains/losses on pension plans, net of tax (150 ) — (150 ) 150 (150 ) Net change in other comprehensive loss from unconsolidated subsidiaries (1,034 ) — (1,034 ) 1,034 (1,034 ) Total other comprehensive income 56,658 3,590 61,550 (65,140 ) 56,658 Total comprehensive income $ 179,039 $ 111,372 $ 96,152 $ (207,524 ) $ 179,039 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Comprehensive Income (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 444,069 $ 387,173 $ 82,931 $ (469,064 ) $ 445,109 Less: net income attributable to noncontrolling interest — — 1,040 — 1,040 Net income attributable to LKQ stockholders 444,069 387,173 81,891 (469,064 ) 444,069 Other comprehensive (loss) income: Foreign currency translation, net of tax (77,630 ) (2,800 ) (81,456 ) 84,256 (77,630 ) Net change in unrealized gains/losses on cash flow hedges, net of tax 5,964 — — — 5,964 Net change in unrealized gains/losses on pension plans, net of tax (154 ) (239 ) 85 154 (154 ) Net change in other comprehensive income from unconsolidated subsidiaries 2,160 — 2,160 (2,160 ) 2,160 Other comprehensive loss (69,660 ) (3,039 ) (79,211 ) 82,250 (69,660 ) Comprehensive income 374,409 384,134 3,720 (386,814 ) 375,449 Less: comprehensive income attributable to noncontrolling interest — — 1,040 — 1,040 Comprehensive income attributable to LKQ stockholders $ 374,409 $ 384,134 $ 2,680 $ (386,814 ) $ 374,409 For the Nine Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 409,573 $ 343,100 $ 124,038 $ (467,138 ) $ 409,573 Other comprehensive income (loss): Foreign currency translation, net of tax 174,794 17,565 176,769 (194,334 ) 174,794 Net change in unrecognized gains/losses on cash flow hedges, net of tax 457 (133 ) — 133 457 Net change in unrealized gains/losses on pension plans, net of tax (4,053 ) (3,253 ) (800 ) 4,053 (4,053 ) Net change in other comprehensive loss from unconsolidated subsidiaries (1,635 ) — (1,635 ) 1,635 (1,635 ) Total other comprehensive income 169,563 14,179 174,334 (188,513 ) 169,563 Total comprehensive income $ 579,136 $ 357,279 $ 298,372 $ (655,651 ) $ 579,136 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Balance Sheets (In thousands) September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 48,265 $ 31,082 $ 261,999 $ — $ 341,346 Receivables, net 341 366,781 888,754 — 1,255,876 Intercompany receivables, net 7,173 — 20,573 (27,746 ) — Inventories — 1,323,201 1,471,693 — 2,794,894 Prepaid expenses and other current assets 15,452 94,787 90,705 — 200,944 Total current assets 71,231 1,815,851 2,733,724 (27,746 ) 4,593,060 Property, plant and equipment, net 845 589,898 610,260 — 1,201,003 Intangible assets: Goodwill — 2,005,560 2,469,706 — 4,475,266 Other intangibles, net 286 280,229 672,857 — 953,372 Investment in subsidiaries 5,351,986 114,721 — (5,466,707 ) — Intercompany notes receivable 1,067,356 14,958 — (1,082,314 ) — Equity method investments — 16,075 141,334 — 157,409 Other assets 90,293 38,434 76,499 — 205,226 Total assets $ 6,581,997 $ 4,875,726 $ 6,704,380 $ (6,576,767 ) $ 11,585,336 Liabilities and Stockholders’ Equity Current liabilities: Accounts payable $ 2,615 $ 345,660 $ 593,472 $ — $ 941,747 Intercompany payables, net — 20,573 7,173 (27,746 ) — Accrued expenses: Accrued payroll-related liabilities 7,169 48,463 97,904 — 153,536 Other accrued expenses 12,656 106,543 239,013 — 358,212 Refund liability — 54,554 52,178 — 106,732 Other current liabilities 283 18,210 38,595 — 57,088 Current portion of long-term obligations — 2,317 116,048 — 118,365 Total current liabilities 22,723 596,320 1,144,383 (27,746 ) 1,735,680 Long-term obligations, excluding current portion 1,569,387 14,027 2,666,723 — 4,250,137 Intercompany notes payable — 617,389 464,925 (1,082,314 ) — Deferred income taxes 9,715 115,924 199,898 — 325,537 Other noncurrent liabilities 139,712 98,133 138,721 — 376,566 Stockholders' equity: Total Company stockholders’ equity 4,840,460 3,433,933 2,032,774 (5,466,707 ) 4,840,460 Noncontrolling interest — — 56,956 — 56,956 Total stockholders’ equity 4,840,460 3,433,933 2,089,730 (5,466,707 ) 4,897,416 Total liabilities and stockholders' equity $ 6,581,997 $ 4,875,726 $ 6,704,380 $ (6,576,767 ) $ 11,585,336 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Balance Sheets (In thousands) December 31, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 34,360 $ 35,131 $ 210,275 $ — $ 279,766 Receivables, net — 290,958 736,148 — 1,027,106 Intercompany receivables, net 2,669 3,010 230 (5,909 ) — Inventories — 1,334,766 1,046,017 — 2,380,783 Prepaid expenses and other current assets 34,136 44,849 55,494 — 134,479 Total current assets 71,165 1,708,714 2,048,164 (5,909 ) 3,822,134 Property, plant and equipment, net 910 563,262 348,917 — 913,089 Intangible assets: Goodwill — 2,010,209 1,526,302 — 3,536,511 Other intangibles, net — 291,036 452,733 — 743,769 Investment in subsidiaries 5,952,687 102,931 — (6,055,618 ) — Intercompany notes receivable 1,156,550 782,638 — (1,939,188 ) — Equity method investments — 336 208,068 — 208,404 Other assets 70,590 33,597 38,778 — 142,965 Total assets $ 7,251,902 $ 5,492,723 $ 4,622,962 $ (8,000,715 ) $ 9,366,872 Liabilities and Stockholders’ Equity Current liabilities: Accounts payable $ 5,742 $ 340,951 $ 441,920 $ — $ 788,613 Intercompany payables, net — 230 5,679 (5,909 ) — Accrued expenses: Accrued payroll-related liabilities 9,448 65,811 68,165 — 143,424 Other accrued expenses 5,219 95,900 117,481 — 218,600 Other current liabilities 282 27,066 18,379 — 45,727 Current portion of long-term obligations 16,468 1,912 107,980 — 126,360 Total current liabilities 37,159 531,870 759,604 (5,909 ) 1,322,724 Long-term obligations, excluding current portion 2,095,826 7,372 1,174,422 — 3,277,620 Intercompany notes payable 750,000 677,708 511,480 (1,939,188 ) — Deferred income taxes 12,402 116,021 123,936 — 252,359 Other noncurrent liabilities 158,346 101,189 47,981 — 307,516 Stockholders' equity: Total Company stockholders’ equity 4,198,169 4,058,563 1,997,055 (6,055,618 ) 4,198,169 Noncontrolling interest — — 8,484 — 8,484 Total stockholders’ equity 4,198,169 4,058,563 2,005,539 (6,055,618 ) 4,206,653 Total liabilities and stockholders' equity $ 7,251,902 $ 5,492,723 $ 4,622,962 $ (8,000,715 ) $ 9,366,872 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Cash Flows (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated CASH FLOWS FROM OPERATING ACTIVITIES: Net cash provided by operating activities $ 334,226 $ 142,626 $ 97,506 $ (53,191 ) $ 521,167 CASH FLOWS FROM INVESTING ACTIVITIES: Purchases of property, plant and equipment (315 ) (93,063 ) (78,385 ) — (171,763 ) Investment and intercompany note activity with subsidiaries 73,096 — — (73,096 ) — Return of investment in subsidiaries 152,443 — — (152,443 ) — Acquisitions, net of cash acquired — (2,888 ) (1,203,179 ) — (1,206,067 ) Investments in unconsolidated subsidiaries — (11,066 ) — — (11,066 ) Receipts of deferred purchase price on receivables under factoring arrangements — 224,753 9,410 (224,753 ) 9,410 Other investing activities, net 887 2,162 4,921 — 7,970 Net cash provided by (used in) investing activities 226,111 119,898 (1,267,233 ) (450,292 ) (1,371,516 ) CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from exercise of stock options 3,772 — — — 3,772 Taxes paid related to net share settlements of stock-based compensation awards (4,768 ) — — — (4,768 ) Debt issuance costs (1,354 ) — (15,584 ) — (16,938 ) Proceeds from issuance of Euro Notes (2026/28) — — 1,232,100 — 1,232,100 Borrowings under revolving credit facilities 304,000 — 721,496 — 1,025,496 Repayments under revolving credit facilities (732,897 ) — (377,138 ) — (1,110,035 ) Repayments under term loans (114,800 ) — — — (114,800 ) (Repayments) borrowings of other debt, net (385 ) 101 (38,411 ) — (38,695 ) Other financing activities, net — — 3,182 — 3,182 Investment and intercompany note activity with parent — (62,763 ) (10,333 ) 73,096 — Dividends — (203,448 ) (226,939 ) 430,387 — Net cash (used in) provided by financing activities (546,432 ) (266,110 ) 1,288,373 503,483 979,314 Effect of exchange rate changes on cash and cash equivalents — (463 ) (66,922 ) — (67,385 ) Net increase (decrease) in cash and cash equivalents 13,905 (4,049 ) 51,724 — 61,580 Cash and cash equivalents, beginning of period 34,360 35,131 210,275 — 279,766 Cash and cash equivalents, end of period $ 48,265 $ 31,082 $ 261,999 $ — $ 341,346 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Cash Flows (In thousands) For the Nine Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated CASH FLOWS FROM OPERATING ACTIVITIES: Net cash provided by operating activities $ 227,314 $ 162,114 $ 108,095 $ (48,280 ) $ 449,243 CASH FLOWS FROM INVESTING ACTIVITIES: Purchases of property, plant and equipment (509 ) (70,292 ) (64,736 ) — (135,537 ) Investment and intercompany note activity with subsidiaries 296,561 — — (296,561 ) — Acquisitions, net of cash acquired — (79,496 ) (173,171 ) — (252,667 ) Proceeds from disposals of business/investment — 305,740 (4,443 ) — 301,297 Investments in unconsolidated subsidiaries — (2,200 ) (4,914 ) — (7,114 ) Receipts of deferred purchase price on receivables under factoring arrangements (1) — 226,395 — (226,395 ) — Other investing activities, net — 3,100 6,764 — 9,864 Net cash provided by (used in) investing activities 296,052 383,247 (240,500 ) (522,956 ) (84,157 ) CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from exercise of stock options 6,465 — — — 6,465 Taxes paid related to net share settlements of stock-based compensation awards (5,095 ) — — — (5,095 ) Borrowings under revolving credit facilities 187,000 — 237,976 — 424,976 Repayments under revolving credit facilities (694,896 ) — (75,988 ) — (770,884 ) Repayments under term loans (27,884 ) — — — (27,884 ) Borrowings under receivables securitization facility — — 8,525 — 8,525 Repayments under receivables securitization facility — — (9,925 ) — (9,925 ) (Repayments) borrowings of other debt, net (1,700 ) (1,238 ) 27,460 — 24,522 Payments of other obligations — (1,336 ) (743 ) — (2,079 ) Other financing activities, net — 5,000 (684 ) — 4,316 Investment and intercompany note activity with parent — (286,530 ) (10,031 ) 296,561 — Dividends — (274,675 ) — 274,675 — Net cash (used in) provided by financing activities (536,110 ) (558,779 ) 176,590 571,236 (347,063 ) Effect of exchange rate changes on cash and cash equivalents — 322 22,216 — 22,538 Net (decrease) increase in cash and cash equivalents (12,744 ) (13,096 ) 66,401 — 40,561 Cash and cash equivalents of continuing operations, beginning of period 33,030 35,360 159,010 — 227,400 Add: Cash and cash equivalents of discontinued operations, beginning of period — 149 6,967 — 7,116 Cash and cash equivalents of continuing and discontinued operations, beginning of period 33,030 35,509 165,977 — 234,516 Cash and cash equivalents, end of period $ 20,286 $ 22,413 $ 232,378 $ — $ 275,077 (1) Reflects the impact of adopting ASU 2016-15

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Receivables and Allowance for Doubtful Accounts	We have a reserve for uncollectible accounts, which was approximately $63 million and $58 million at September 30, 2018 and December 31, 2017, respectively. Our May 2018 acquisition of Stahlgruber contributed $ 3 million to our reserve for uncollectible accounts. See Note 2, "Business Combinations" for further information on our acquisitions.
Inventory	Inventories consist of the following (in thousands): September 30, December 31, 2018 2017 Aftermarket and refurbished products $ 2,287,776 $ 1,877,653 Salvage and remanufactured products 484,761 487,108 Manufactured products 22,357 16,022 Total inventories $ 2,794,894 $ 2,380,783 Aftermarket and refurbished products and salvage and remanufactured products are primarily composed of finished goods. As of September 30, 2018, manufactured products inventory was composed of $16 million of raw materials, $2 million of work in process, and $4 million of finished goods. As of December 31, 2017, manufactured products inventory was composed of $10 million of raw materials, $2 million of work in process, and $4 million of finished goods. Our May 2018 acquisition of Stahlgruber contributed $374 million to our aftermarket and refurbished products inventory. See Note 2, "Business Combinations" for further information on our acquisitions.
Property and Equipment	Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 Property, Plant and Equipment Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 The components of opening property, plant and equipment acquired as part of our acquisition of Stahlgruber in May 2018 are as follows (in thousands): Gross Amount Land and improvements $ 47,281 Buildings and improvements 125,649 Machinery and equipment 49,384 Computer equipment and software 3,760 Vehicles and trailers 643 Furniture and fixtures 28,535 Leasehold improvements 1,890 257,142 Construction in progress 3,519 Total property, plant and equipment $ 260,661 We record depreciation expense associated with our refurbishing, remanufacturing, manufacturing and furnace operations as well as our distribution centers in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. All other depreciation expense is reported in Depreciation and amortization. Total depreciation expense for the three and nine months ended September 30, 2018 was $39 million and $115 million , respectively, and $34 million and $93 million during the three and nine months ended September 30, 2017, respectively.
Intangible Assets	Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer and supplier relationships, software and other technology related assets, and covenants not to compete. The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2018 are as follows (in thousands): North America Europe Specialty Total Balance as of January 1, 2018 $ 1,709,354 $ 1,414,898 $ 412,259 $ 3,536,511 Business acquisitions and adjustments to previously recorded goodwill 1,073 1,002,277 (5,720 ) 997,630 Exchange rate effects (3,049 ) (55,901 ) 75 (58,875 ) Balance as of September 30, 2018 $ 1,707,378 $ 2,361,274 $ 406,614 $ 4,475,266 During the nine months ended September 30, 2018, we recorded $ 929 million of goodwill related to our acquisition of Stahlgruber. See Note 2, "Business Combinations" for further information on our acquisitions. The components of other intangibles, net are as follows (in thousands): September 30, 2018 December 31, 2017 Intangible assets subject to amortization $ 872,072 $ 664,969 Indefinite-lived intangible assets Trademarks 81,300 78,800 Total $ 953,372 $ 743,769 The components of intangible assets subject to amortization are as follows (in thousands): September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Trade names and trademarks $ 495,839 $ (88,805 ) $ 407,034 $ 327,332 $ (75,095 ) $ 252,237 Customer and supplier relationships 586,221 (223,085 ) 363,136 510,113 (167,532 ) 342,581 Software and other technology related assets 172,391 (73,760 ) 98,631 124,049 (59,081 ) 64,968 Covenants not to compete 13,488 (10,217 ) 3,271 14,981 (9,798 ) 5,183 Total $ 1,267,939 $ (395,867 ) $ 872,072 $ 976,475 $ (311,506 ) $ 664,969 The components of intangible assets acquired as part of our acquisitions in 2018 are as follows (in thousands): Nine Months Ended September 30, 2018 Stahlgruber Other Acquisitions Total Trade names and trademarks $ 173,946 $ 2,895 $ 176,841 Customer and supplier relationships 78,239 8,194 86,433 Software and other technology related assets 33,344 92 33,436 Total $ 285,529 $ 11,181 $ 296,710 The weighted-average amortization periods for our intangible assets acquired during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in years): Nine Months Ended Year Ended September 30, 2018 December 31, 2017 Stahlgruber Other Acquisitions Total All Acquisitions Trade names and trademarks 19.9 20.0 19.9 11.2 Customer and supplier relationships 3.0 9.6 3.6 18.6 Software and other technology related assets 6.8 6.0 6.8 11.1 Covenants not to compete - - - 4.4 Total acquired finite-lived intangible assets 13.7 12.2 13.7 16.5 Our estimated useful lives for our finite-lived intangible assets are as follows: Method of Amortization Useful Life Trade names and trademarks Straight-line 4-30 years Customer and supplier relationships Accelerated 3-20 years Software and other technology related assets Straight-line 3-15 years Covenants not to compete Straight-line 2-5 years Amortization expense for intangibles was $42 million and $96 million during the three and nine months ended September 30, 2018, respectively, and $26 million and $74 million during the three and nine months ended September 30, 2017, respectively. Estimated amortization expense for each of the five years in the period ending December 31, 2022 is $40 million (for the remaining three months of 2018), $136 million , $104 million , $75 million and $62 million , respectively.
Equity Method Investments [Policy Text Block]	Our investment in unconsolidated subsidiaries was $157 million and $208 million as of September 30, 2018 and December 31, 2017, respectively. On December 1, 2016 , we acquired a 26.5% equity interest in Mekonomen AB ("Mekonomen") for an aggregate purchase price of $181 million . Headquartered in Stockholm, Sweden, Mekonomen is the leading independent car parts and service chain in the Nordic region of Europe, offering a range of products including spare parts and accessories for cars, and workshop services for consumers and businesses. As a result of the investment, we nominated two representatives for election to Mekonomen's board of directors; both representatives were subsequently elected to and continue to serve on the board of directors, including one as the chairman of the board. We are accounting for our interest in Mekonomen using the equity method of accounting, as our investment gives us the ability to exercise significant influence, but not control, over the investee. As of September 30, 2018, the book value of our investment in Mekonomen exceeded our share of the book value of Mekonomen's net assets by $64 million ; this difference is primarily related to goodwill and the fair value of other intangible assets. We are recording our equity in the net earnings of Mekonomen on a one quarter lag. We recorded equity losses of $20 million and $18 million during the three and nine months ended September 30, 2018, respectively, and equity in earnings of $3 million and $5 million during the three and nine months ended September 30, 2017 related to our investment in Mekonomen, including adjustments to convert the results to GAAP and to recognize the impact of our purchase accounting adjustments. In May 2018 and May 2017, we received cash dividends of $8 million (SEK 67 million ) and $7 million (SEK 67 million ), respectively, related to our investment in Mekonomen. On July 6, 2018, Mekonomen announced the acquisition of two automotive spare parts distributors in Denmark and Poland. The objective of the acquisition is to strengthen Mekonomen's position in the sale of automotive spare parts in northern Europe and to establish a strong market position in Denmark and Poland, where Mekonomen has no current operations. The acquisition is partially being financed by a rights issue with preferential rights for Mekonomen's existing shareholders, who were given the right to subscribe for four new Mekonomen shares per seven existing owned shares at a discounted share price. On October 5, 2018, we subscribed for our pro rata share in the rights issue giving us the right to acquire an additional $48 million of equity in Mekonomen at a discounted share price, retaining our 26.5% equity interest. We recorded a derivative instrument of $29 million in Other assets on our Unaudited Condensed Consolidated Balance Sheets, which represents our right to acquire Mekonomen shares at a discount. We are measuring the derivative instrument at fair value, and we recorded a $3 million gain on our fair value remeasurement during the three months ended September 30, 2018; the gain is recorded in Other income, net on the Unaudited Condensed Consolidated Statements of Income. In the fourth quarter, we will record an $8 million loss related to the settlement of the derivative instrument in October 2018 due to a decrease in the Mekonomen share price from the last day of the third quarter to the settlement date. We evaluated our investment in Mekonomen for other-than-temporary impairment as of September 30, 2018, and concluded the decline in fair value was other-than-temporary due to a prolonged and significant stock price decrease. Therefore, we recognized an other-than-temporary impairment of $23 million , which represents the difference in the carrying value and the fair value of our investment in Mekonomen. The fair value of our investment in Mekonomen was determined using the Mekonomen share price as of September 30, 2018. The impairment charge is recorded in Equity in (losses) earnings of unconsolidated subsidiaries in our Unaudited Condensed Consolidated Statements of Income. Equity in losses and earnings from our investment in Mekonomen are reported in the Europe segment. As a result of the impairment charge, the Level 1 fair value of our equity investment in the publicly traded Mekonomen common stock at September 30, 2018 approximated the carrying value of $134 million .
Warranty Reserve	Some of our salvage mechanical products are sold with a standard six month warranty against defects. Additionally, some of our remanufactured engines are sold with a standard three year warranty against defects. We also provide a limited lifetime warranty for certain of our aftermarket products. These assurance-type warranties are not considered a separate performance obligation, and thus no transaction price is allocated to them. We record the warranty costs in Cost of goods sold on our Unaudited Condensed Consolidated Statements of Income. Our warranty reserve is calculated using historical claim information to project future warranty claims activity and is recorded within Other accrued expenses and Other noncurrent liabilities on our Unaudited Condensed Consolidated Balance Sheets based on the expected timing of the related payments. The changes in the warranty reserve are as follows (in thousands): Balance as of December 31, 2017 $ 23,151 Warranty expense 33,670 Warranty claims (31,980 ) Balance as of September 30, 2018 $ 24,841
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adoption of New Revenue Standard In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update 2014-09, "Revenue from Contracts with Customers" ("ASU 2014-09"). This update outlines a new comprehensive revenue recognition model that supersedes the prior revenue recognition guidance and requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The FASB has issued several updates to ASU 2014-09, which collectively with ASU 2014-09, represent the FASB Accounting Standards Codification Topic 606 (“ASC 606”). On January 1, 2018, we adopted ASC 606 for all contracts using the modified retrospective method, which means the historical periods are presented under the previous revenue standards with the cumulative net income effect being adjusted through retained earnings. Most of the changes resulting from our adoption of ASC 606 were changes in presentation within the Unaudited Condensed Consolidated Balance Sheets and the Unaudited Condensed Consolidated Statements of Income. Therefore, while we made adjustments to certain opening balances on our January 1, 2018 balance sheet, we made no adjustments to opening retained earnings. We expect the impact of the adoption of ASC 606 to be immaterial to our net income on an ongoing basis. See Note 5, "Revenue Recognition" for the required disclosures under ASC 606. With the adoption of ASC 606, we reclassified certain amounts related to variable consideration. Under ASC 606, we are required to present a refund liability and a returns asset within the Unaudited Condensed Consolidated Balance Sheet, whereas in periods prior to adoption, we presented the estimated margin impact of expected returns as a contra-asset within accounts receivable. Additionally, under ASC 606, the changes in the refund liability are reported in revenue, and the changes in the returns assets are reported in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. Prior to adoption, the change in the reserve for returns was generally reported as a net amount within revenue. As a result, the income statement presentation was adjusted concurrently with the balance sheet change beginning in 2018. The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASC 606 was as follows (in thousands): Balance as of December 31, 2017 Adjustments Due to ASC 606 Balance as of January 1, 2018 Balance Sheet Assets Accounts receivable $ 1,027,106 $ 38,511 $ 1,065,617 Prepaid expenses and other current assets 134,479 44,508 178,987 Liabilities Refund liability — 83,019 83,019 The impact of the adoption of ASC 606 on our Unaudited Condensed Consolidated Balance Sheet as of September 30, 2018 and our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 was as follows (in thousands): Balance as of September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Balance Sheet Assets Accounts receivable $ 1,255,876 $ 1,205,833 $ 50,043 Prepaid expenses and other current assets 200,944 144,255 56,689 Liabilities Refund liability 106,732 — 106,732 For the three months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 3,122,378 $ 3,123,468 $ (1,090 ) Cost of goods sold 1,925,180 1,925,107 73 Selling, general and administrative expenses 879,150 880,313 (1,163 ) For the nine months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 8,873,893 $ 8,882,558 $ (8,665 ) Cost of goods sold 5,460,845 5,467,061 (6,216 ) Selling, general and administrative expenses 2,472,085 2,474,534 (2,449 ) We have not included a table of the impact of the balance sheet adjustments on the Unaudited Condensed Consolidated Statement of Cash Flows as the adjustment will net to zero within the operating activities section of this statement. Under ASC 606, we have elected not to adjust consideration for the effect of a significant financing component at contract inception if the period between the transfer of goods to the customer and payment received from the customer is one year or less. Generally, our payment terms are short term in nature, but in some instances we may offer extended terms to customers exceeding one year such that interest would be accrued with respect to those contracts. The interest that would be accrued related to these contracts is immaterial at September 30, 2018. Under ASC 340, "Other Assets and Deferred Costs," we have elected to recognize incremental costs of obtaining a contract (commissions earned by our sales representatives on product sales) as an expense when incurred, as we believe the amortization period of the asset would be one year or less due to the short-term nature of our contracts. Other Recently Adopted Accounting Pronouncements During the first quarter of 2018, we adopted ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”), which changes how entities will recognize, measure, present and make disclosures about certain financial assets and financial liabilities. The adoption of ASU 2016-01 did not have a significant impact on our financial position, results of operations, cash flows or disclosures. During the first quarter of 2018, we adopted ASU No. 2016-15, "Classification of Certain Cash Receipts and Cash Payments" ("ASU 2016-15"), which includes guidance on classification for the following items: debt prepayment or debt extinguishment costs, settlement of zero coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims and corporate-owned or bank-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and other separately identifiable cash flows where application of the predominance principle is prescribed. No adjustments were required in our Unaudited Condensed Consolidated Statement of Cash Flows upon adoption. Within our Unaudited Condensed Consolidating Statements of Cash Flows in Note 18, "Condensed Consolidating Financial Information ," we now present a new line item, Payments of deferred purchase price on receivables securitization, as a result of adopting ASU 2016-15; prior year cash flow information within this footnote has been recast to reflect the impact of adopting this accounting standard. Other than the addition of this new line item, there was no impact to our Unaudited Condensed Consolidating Statements of Cash Flows upon adoption. During the first quarter of 2018, we adopted ASU No. 2017-01, "Clarifying the Definition of a Business" (“ASU 2017-01”), which requires an evaluation of whether substantially all of the fair value of assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. If so, the transaction does not qualify as a business. The guidance also requires an acquired business to include at least one substantive process and narrows the definition of outputs. The adoption of ASU 2017-01 did not have a material impact on our unaudited condensed consolidated financial statements. During the first quarter of 2018, we adopted ASU No. 2018-02, "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" ("ASU 2018-02"), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the reduction of the U.S. federal statutory income tax rate to 21% from 35% due to the enactment of the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). In addition, under ASU 2018-02, an entity is required to provide certain disclosures regarding stranded tax effects. ASU 2018-02 is effective for fiscal years and interim periods beginning after December 15, 2018; early adoption is permitted. As a result of the adoption of ASU 2018-02, we recorded a $5 million reclassification to increase Accumulated Other Comprehensive (Loss) Income and decrease Retained Earnings. During the first quarter of 2018, we adopted ASU No. 2017-07, "Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost" ("ASU 2017-07"), which requires presentation of the current service cost component of net periodic benefit expense with other current compensation expenses for the related employees, and requires presentation of the remaining components of net periodic benefit expense, such as interest, expected return on plan assets, and amortization of actuarial gains and losses, outside of operating income. ASU 2017-07 also specifies that, on a prospective basis, only the service cost component is eligible for capitalization into inventory or other assets. While the income statement classification provisions of ASU 2017-07 are applicable on a retrospective basis, due to the immaterial impact to our Unaudited Condensed Consolidated Statements of Income in prior periods, we did not recast prior period income statement information and adopted the classification provisions on a prospective basis. The change in the capitalization provisions under ASU 2017-07 did not have a material impact on our unaudited condensed consolidated financial statements. See Note 13, "Employee Benefit Plans ," for further disclosure on the components of net periodic benefit expense and classification of the components within our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 and 2017. During the third quarter of 2018, the FASB issued ASU No. 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract" ("ASU 2018-15"). This update requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. ASU 2018-15 is effective for fiscal years and interim periods beginning after December 15, 2019; early adoption is permitted. We have adopted ASU 2018-15 in the third quarter of 2018 as we believe that our existing policy is consistent with the new guidance and thus no adjustments were required to be in compliance with this standard update. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, "Leases" ("ASU 2016-02"), to increase transparency and comparability by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The main difference between current GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under current GAAP. ASU 2016-02 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The standard requires that entities apply the effects of these changes using a modified retrospective approach, which includes a number of optional practical expedients. While we are still in the process of quantifying the impact that the adoption of ASU 2016-02 will have on our consolidated financial statements and related disclosures, we anticipate the adoption will materially affect our consolidated balance sheet and disclosures, as the majority of our operating leases will be recorded on the balance sheet under ASU 2016-02. While we do not anticipate the adoption of this accounting standard to have a material impact on our consolidated statements of income at this time, this conclusion may change as we finalize our assessment. In order to assist in our timely implementation of the new standard, we have purchased new software to track our leases. We have engaged a third party to assist with the implementation of the new software with an expectation to complete the implementation by the end of 2018. During the second quarter, we completed phase one of the software roll-out for our North America and Specialty operations. We are nearing completion of the phase one roll-out in our Europe operations as of the filing date of this Quarterly Report on Form 10-Q. In August 2017, the FASB issued ASU No. 2017-12, "Targeted Improvements to Accounting for Hedging Activities" ("ASU 2017-12"), which amends the hedge accounting recognition and presentation requirements in ASC 815 ("Derivatives and Hedging"). ASU 2017-12 significantly alters the hedge accounting model by making it easier for an entity to achieve and maintain hedge accounting and provides for accounting that better reflects an entity's risk management activities. ASU 2017-12 is effective for fiscal years and interim periods beginning after December 15, 2018; early adoption is permitted. Entities will adopt the provisions of ASU 2017-12 by applying a modified retrospective approach to existing hedging relationships as of the adoption date. At this time, we are still evaluating the impact of this standard on our financial statements. In August 2018, the FASB issued ASU No. 2018-13, "Disclosure Framework- Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13"), which removes, modifies, and adds certain disclosure requirements in ASC 820. ASU 2018-13 is effective for fiscal years and interim periods beginning after December 15, 2019; early adoption is permitted. We are in the process of evaluating the impact of this standard on our disclosures but do not believe that it will have a material impact. In August 2018, the FASB issued ASU No. 2018-14, "Disclosure Framework- Changes to the Disclosure Requirements for Defined Benefit Plans" ("ASU 2018-14"), which removes, modifies, and adds certain disclosure requirements to ASC 715-20. ASU 2018-14 is effective for fiscal years and interim periods beginning after December 15, 2020; early adoption is permitted. We are in the process of evaluating the impact of this standard on our disclosures.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Purchase Price Allocations For Acquisitions	The purchase price allocations for the acquisitions completed during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in thousands): Nine Months Ended Year Ended September 30, 2018 December, 31, 2017 Stahlgruber Other Acquisitions (2) Total All (1) Receivables $ 140,979 $ 15,369 $ 156,348 $ 73,782 Receivable reserves (2,818 ) (875 ) (3,693 ) (7,032 ) Inventories (3) 374,056 12,240 386,296 150,342 Prepaid expenses and other current assets 9,537 1,806 11,343 (295 ) Property , plant and equipment 260,661 6,089 266,750 41,039 Goodwill 929,376 68,254 997,630 314,817 Other intangibles 285,529 16,315 301,844 181,216 Other assets 16,625 37 16,662 3,257 Deferred income taxes (97,805 ) (716 ) (98,521 ) (65,087 ) Current liabilities assumed (343,221 ) (20,662 ) (363,883 ) (111,484 ) Debt assumed (65,852 ) (4,410 ) (70,262 ) (33,586 ) Other noncurrent liabilities assumed (4) (81,689 ) (9,993 ) (91,682 ) (1,917 ) Noncontrolling interest (44,250 ) — (44,250 ) — Contingent consideration liabilities — (3,107 ) (3,107 ) (6,234 ) Other purchase price obligations (2,349 ) 3,853 1,504 (5,074 ) Stock issued (251,334 ) — (251,334 ) — Notes issued — (6,948 ) (6,948 ) (20,187 ) Settlement of pre-existing balances — — — 242 Gains on bargain purchases (5) — (328 ) (328 ) (3,870 ) Settlement of other purchase price obligations (non-interest bearing) — 1,698 1,698 3,159 Cash used in acquisitions, net of cash acquired $ 1,127,445 $ 78,622 $ 1,206,067 $ 513,088
Pro Forma Effect Of Businesses Acquired	The following pro forma summary presents the effect of the businesses acquired during the nine months ended September 30, 2018 as though the businesses had been acquired as of January 1, 2017, and the businesses acquired during the year ended December 31, 2017 as though they had been acquired as of January 1, 2016. The pro forma adjustments are based upon unaudited financial information of the acquired entities (in thousands, except per share data): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Revenue, as reported $ 3,122,378 $ 2,465,800 $ 8,873,893 $ 7,267,054 Revenue of purchased businesses for the period prior to acquisition: Stahlgruber — 473,326 815,405 1,289,083 Other acquisitions 6,641 83,893 51,132 387,844 Pro forma revenue $ 3,129,019 $ 3,023,019 $ 9,740,430 $ 8,943,981 Income from continuing operations, as reported (1) $ 134,480 $ 122,381 $ 445,109 $ 414,104 Income from continuing operations of purchased businesses for the period prior to acquisition, and pro forma purchase accounting adjustments: Stahlgruber 5,054 6,061 14,114 5,298 Other acquisitions 161 3,478 1,588 17,014 Acquisition related expenses, net of tax (2) 681 2,301 13,986 5,010 Pro forma income from continuing operations 140,376 134,221 474,797 441,426 Less: Pro forma net income attributable to noncontrolling interest — 888 2,799 2,157 Pro forma income from continuing operations attributable to LKQ stockholders $ 140,376 $ 133,333 $ 471,998 $ 439,269 Earnings per share from continuing operations, basic - as reported $ 0.42 $ 0.40 $ 1.42 $ 1.34 Effect of purchased businesses for the period prior to acquisition: Stahlgruber 0.02 0.02 0.05 0.02 Other acquisitions 0.00 0.01 0.01 0.06 Acquisition related expenses, net of tax (2) 0.00 0.01 0.04 0.02 Impact of share issuance from acquisition of Stahlgruber — (0.01 ) (0.02 ) (0.03 ) Pro forma earnings per share from continuing operations, basic (3) 0.44 0.42 1.49 1.39 Less: Pro forma net income attributable to noncontrolling interest — 0.00 0.01 0.01 Pro forma income from continuing operations attributable to LKQ stockholders $ 0.44 $ 0.42 $ 1.49 $ 1.39 Earnings per share from continuing operations, diluted - as reported $ 0.42 $ 0.39 $ 1.41 $ 1.33 Effect of purchased businesses for the period prior to acquisition: Stahlgruber 0.02 0.02 0.04 0.02 Other acquisitions 0.00 0.01 0.01 0.05 Acquisition related expenses, net of tax (2) 0.00 0.01 0.04 0.02 Impact of share issuance from acquisition of Stahlgruber — (0.01 ) (0.02 ) (0.03 ) Pro forma earnings per share from continuing operations, diluted (3) 0.44 0.42 1.49 1.39 Less: Pro forma net income attributable to noncontrolling interest — 0.00 0.01 0.01 Pro forma income from continuing operations attributable to LKQ stockholders $ 0.44 $ 0.42 $ 1.48 $ 1.38

Discontinued Operations Discont

Discontinued Operations Discontinued Operations Income statement (Tables)	9 Months Ended
	Sep. 30, 2017
Disposal Groups, Including Discontinued Operations [Table Text Block]	The following table summarizes the operating results of the Company’s discontinued operations related to the sale described above for the nine months ended September 30, 2017, as presented in Net loss from discontinued operations on the Unaudited Condensed Consolidated Statements of Income (in thousands): Nine Months Ended September 30, 2017 Revenue $ 111,130 Cost of goods sold 100,084 Selling, general and administrative expenses 8,369 Operating income 2,677 Interest and other income, net (1) 1,204 Income from discontinued operations before taxes 3,881 Provision for income taxes 3,598 Equity in loss of unconsolidated subsidiaries (534 ) Loss from discontinued operations, net of tax (251 ) Loss on sale of discontinued operations, net of tax (2) (4,280 ) Net loss from discontinued operations $ (4,531 )

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Warranty Reserve	Some of our salvage mechanical products are sold with a standard six month warranty against defects. Additionally, some of our remanufactured engines are sold with a standard three year warranty against defects. We also provide a limited lifetime warranty for certain of our aftermarket products. These assurance-type warranties are not considered a separate performance obligation, and thus no transaction price is allocated to them. We record the warranty costs in Cost of goods sold on our Unaudited Condensed Consolidated Statements of Income. Our warranty reserve is calculated using historical claim information to project future warranty claims activity and is recorded within Other accrued expenses and Other noncurrent liabilities on our Unaudited Condensed Consolidated Balance Sheets based on the expected timing of the related payments. The changes in the warranty reserve are as follows (in thousands): Balance as of December 31, 2017 $ 23,151 Warranty expense 33,670 Warranty claims (31,980 ) Balance as of September 30, 2018 $ 24,841
Equity Method Investments [Policy Text Block]	Our investment in unconsolidated subsidiaries was $157 million and $208 million as of September 30, 2018 and December 31, 2017, respectively. On December 1, 2016 , we acquired a 26.5% equity interest in Mekonomen AB ("Mekonomen") for an aggregate purchase price of $181 million . Headquartered in Stockholm, Sweden, Mekonomen is the leading independent car parts and service chain in the Nordic region of Europe, offering a range of products including spare parts and accessories for cars, and workshop services for consumers and businesses. As a result of the investment, we nominated two representatives for election to Mekonomen's board of directors; both representatives were subsequently elected to and continue to serve on the board of directors, including one as the chairman of the board. We are accounting for our interest in Mekonomen using the equity method of accounting, as our investment gives us the ability to exercise significant influence, but not control, over the investee. As of September 30, 2018, the book value of our investment in Mekonomen exceeded our share of the book value of Mekonomen's net assets by $64 million ; this difference is primarily related to goodwill and the fair value of other intangible assets. We are recording our equity in the net earnings of Mekonomen on a one quarter lag. We recorded equity losses of $20 million and $18 million during the three and nine months ended September 30, 2018, respectively, and equity in earnings of $3 million and $5 million during the three and nine months ended September 30, 2017 related to our investment in Mekonomen, including adjustments to convert the results to GAAP and to recognize the impact of our purchase accounting adjustments. In May 2018 and May 2017, we received cash dividends of $8 million (SEK 67 million ) and $7 million (SEK 67 million ), respectively, related to our investment in Mekonomen. On July 6, 2018, Mekonomen announced the acquisition of two automotive spare parts distributors in Denmark and Poland. The objective of the acquisition is to strengthen Mekonomen's position in the sale of automotive spare parts in northern Europe and to establish a strong market position in Denmark and Poland, where Mekonomen has no current operations. The acquisition is partially being financed by a rights issue with preferential rights for Mekonomen's existing shareholders, who were given the right to subscribe for four new Mekonomen shares per seven existing owned shares at a discounted share price. On October 5, 2018, we subscribed for our pro rata share in the rights issue giving us the right to acquire an additional $48 million of equity in Mekonomen at a discounted share price, retaining our 26.5% equity interest. We recorded a derivative instrument of $29 million in Other assets on our Unaudited Condensed Consolidated Balance Sheets, which represents our right to acquire Mekonomen shares at a discount. We are measuring the derivative instrument at fair value, and we recorded a $3 million gain on our fair value remeasurement during the three months ended September 30, 2018; the gain is recorded in Other income, net on the Unaudited Condensed Consolidated Statements of Income. In the fourth quarter, we will record an $8 million loss related to the settlement of the derivative instrument in October 2018 due to a decrease in the Mekonomen share price from the last day of the third quarter to the settlement date. We evaluated our investment in Mekonomen for other-than-temporary impairment as of September 30, 2018, and concluded the decline in fair value was other-than-temporary due to a prolonged and significant stock price decrease. Therefore, we recognized an other-than-temporary impairment of $23 million , which represents the difference in the carrying value and the fair value of our investment in Mekonomen. The fair value of our investment in Mekonomen was determined using the Mekonomen share price as of September 30, 2018. The impairment charge is recorded in Equity in (losses) earnings of unconsolidated subsidiaries in our Unaudited Condensed Consolidated Statements of Income. Equity in losses and earnings from our investment in Mekonomen are reported in the Europe segment. As a result of the impairment charge, the Level 1 fair value of our equity investment in the publicly traded Mekonomen common stock at September 30, 2018 approximated the carrying value of $134 million .
Property and Equipment	Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 Property, Plant and Equipment Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 The components of opening property, plant and equipment acquired as part of our acquisition of Stahlgruber in May 2018 are as follows (in thousands): Gross Amount Land and improvements $ 47,281 Buildings and improvements 125,649 Machinery and equipment 49,384 Computer equipment and software 3,760 Vehicles and trailers 643 Furniture and fixtures 28,535 Leasehold improvements 1,890 257,142 Construction in progress 3,519 Total property, plant and equipment $ 260,661 We record depreciation expense associated with our refurbishing, remanufacturing, manufacturing and furnace operations as well as our distribution centers in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. All other depreciation expense is reported in Depreciation and amortization. Total depreciation expense for the three and nine months ended September 30, 2018 was $39 million and $115 million , respectively, and $34 million and $93 million during the three and nine months ended September 30, 2017, respectively.
Schedule Of Inventory	Inventories consist of the following (in thousands): September 30, December 31, 2018 2017 Aftermarket and refurbished products $ 2,287,776 $ 1,877,653 Salvage and remanufactured products 484,761 487,108 Manufactured products 22,357 16,022 Total inventories $ 2,794,894 $ 2,380,783
Changes In Carrying Amount Of Goodwill	Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer and supplier relationships, software and other technology related assets, and covenants not to compete. The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2018 are as follows (in thousands): North America Europe Specialty Total Balance as of January 1, 2018 $ 1,709,354 $ 1,414,898 $ 412,259 $ 3,536,511 Business acquisitions and adjustments to previously recorded goodwill 1,073 1,002,277 (5,720 ) 997,630 Exchange rate effects (3,049 ) (55,901 ) 75 (58,875 ) Balance as of September 30, 2018 $ 1,707,378 $ 2,361,274 $ 406,614 $ 4,475,266 During the nine months ended September 30, 2018, we recorded $ 929 million of goodwill related to our acquisition of Stahlgruber. See Note 2, "Business Combinations" for further information on our acquisitions.
Schedule of Finite-Lived and Indefinite-Lived Intangibles [Table Text Block]	The components of other intangibles, net are as follows (in thousands): September 30, 2018 December 31, 2017 Intangible assets subject to amortization $ 872,072 $ 664,969 Indefinite-lived intangible assets Trademarks 81,300 78,800 Total $ 953,372 $ 743,769
Cumulative Impact of ASC 606 on Balance Sheet as of the Beginning of Fiscal Year	The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASC 606 was as follows (in thousands): Balance as of December 31, 2017 Adjustments Due to ASC 606 Balance as of January 1, 2018 Balance Sheet Assets Accounts receivable $ 1,027,106 $ 38,511 $ 1,065,617 Prepaid expenses and other current assets 134,479 44,508 178,987 Liabilities Refund liability — 83,019 83,019
Schedule of Estimated Useful Lives, Finite Lived Intangible Assets [Table Text Block]	Our estimated useful lives for our finite-lived intangible assets are as follows: Method of Amortization Useful Life Trade names and trademarks Straight-line 4-30 years Customer and supplier relationships Accelerated 3-20 years Software and other technology related assets Straight-line 3-15 years Covenants not to compete Straight-line 2-5 years
Components Of Other Intangibles	The components of intangible assets subject to amortization are as follows (in thousands): September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Trade names and trademarks $ 495,839 $ (88,805 ) $ 407,034 $ 327,332 $ (75,095 ) $ 252,237 Customer and supplier relationships 586,221 (223,085 ) 363,136 510,113 (167,532 ) 342,581 Software and other technology related assets 172,391 (73,760 ) 98,631 124,049 (59,081 ) 64,968 Covenants not to compete 13,488 (10,217 ) 3,271 14,981 (9,798 ) 5,183 Total $ 1,267,939 $ (395,867 ) $ 872,072 $ 976,475 $ (311,506 ) $ 664,969 Useful Life - Intangible Assets Method of Amortization Useful Life Min Useful Life Max Trade names and trademarks Straight-line 4 years 30 years Customer and supplier relationships Accelerated 3 years 20 years Software and other technology related assets Straight-line 3 years 15 years Covenants not to compete Straight-line 2 years 5 years
Cumulative Effect of Adoption of ASC 606 on Consolidated Financial Statements	The impact of the adoption of ASC 606 on our Unaudited Condensed Consolidated Balance Sheet as of September 30, 2018 and our Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 was as follows (in thousands): Balance as of September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Balance Sheet Assets Accounts receivable $ 1,255,876 $ 1,205,833 $ 50,043 Prepaid expenses and other current assets 200,944 144,255 56,689 Liabilities Refund liability 106,732 — 106,732 For the three months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 3,122,378 $ 3,123,468 $ (1,090 ) Cost of goods sold 1,925,180 1,925,107 73 Selling, general and administrative expenses 879,150 880,313 (1,163 ) For the nine months ended September 30, 2018 As Reported Amounts Without Adoption of ASC 606 Effect of Change Higher/(Lower) Income Statement Revenue $ 8,873,893 $ 8,882,558 $ (8,665 ) Cost of goods sold 5,460,845 5,467,061 (6,216 ) Selling, general and administrative expenses 2,472,085 2,474,534 (2,449 )
Schedule of Product Warranty Liability [Table Text Block]	The changes in the warranty reserve are as follows (in thousands): Balance as of December 31, 2017 $ 23,151 Warranty expense 33,670 Warranty claims (31,980 ) Balance as of September 30, 2018 $ 24,841 The changes in deferred service-type warranty revenue are as follows (in thousands): Balance as of January 1, 2018 $ 19,465 Additional warranty revenue deferred 28,889 Warranty revenue recognized (25,200 ) Balance as of September 30, 2018 $ 23,154
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The components of intangible assets acquired as part of our acquisitions in 2018 are as follows (in thousands): Nine Months Ended September 30, 2018 Stahlgruber Other Acquisitions Total Trade names and trademarks $ 173,946 $ 2,895 $ 176,841 Customer and supplier relationships 78,239 8,194 86,433 Software and other technology related assets 33,344 92 33,436 Total $ 285,529 $ 11,181 $ 296,710
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life [Table Text Block]	The weighted-average amortization periods for our intangible assets acquired during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in years): Nine Months Ended Year Ended September 30, 2018 December 31, 2017 Stahlgruber Other Acquisitions Total All Acquisitions Trade names and trademarks 19.9 20.0 19.9 11.2 Customer and supplier relationships 3.0 9.6 3.6 18.6 Software and other technology related assets 6.8 6.0 6.8 11.1 Covenants not to compete - - - 4.4 Total acquired finite-lived intangible assets 13.7 12.2 13.7 16.5
Intangible Assets	Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer and supplier relationships, software and other technology related assets, and covenants not to compete. The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2018 are as follows (in thousands): North America Europe Specialty Total Balance as of January 1, 2018 $ 1,709,354 $ 1,414,898 $ 412,259 $ 3,536,511 Business acquisitions and adjustments to previously recorded goodwill 1,073 1,002,277 (5,720 ) 997,630 Exchange rate effects (3,049 ) (55,901 ) 75 (58,875 ) Balance as of September 30, 2018 $ 1,707,378 $ 2,361,274 $ 406,614 $ 4,475,266 During the nine months ended September 30, 2018, we recorded $ 929 million of goodwill related to our acquisition of Stahlgruber. See Note 2, "Business Combinations" for further information on our acquisitions. The components of other intangibles, net are as follows (in thousands): September 30, 2018 December 31, 2017 Intangible assets subject to amortization $ 872,072 $ 664,969 Indefinite-lived intangible assets Trademarks 81,300 78,800 Total $ 953,372 $ 743,769 The components of intangible assets subject to amortization are as follows (in thousands): September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Trade names and trademarks $ 495,839 $ (88,805 ) $ 407,034 $ 327,332 $ (75,095 ) $ 252,237 Customer and supplier relationships 586,221 (223,085 ) 363,136 510,113 (167,532 ) 342,581 Software and other technology related assets 172,391 (73,760 ) 98,631 124,049 (59,081 ) 64,968 Covenants not to compete 13,488 (10,217 ) 3,271 14,981 (9,798 ) 5,183 Total $ 1,267,939 $ (395,867 ) $ 872,072 $ 976,475 $ (311,506 ) $ 664,969 The components of intangible assets acquired as part of our acquisitions in 2018 are as follows (in thousands): Nine Months Ended September 30, 2018 Stahlgruber Other Acquisitions Total Trade names and trademarks $ 173,946 $ 2,895 $ 176,841 Customer and supplier relationships 78,239 8,194 86,433 Software and other technology related assets 33,344 92 33,436 Total $ 285,529 $ 11,181 $ 296,710 The weighted-average amortization periods for our intangible assets acquired during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in years): Nine Months Ended Year Ended September 30, 2018 December 31, 2017 Stahlgruber Other Acquisitions Total All Acquisitions Trade names and trademarks 19.9 20.0 19.9 11.2 Customer and supplier relationships 3.0 9.6 3.6 18.6 Software and other technology related assets 6.8 6.0 6.8 11.1 Covenants not to compete - - - 4.4 Total acquired finite-lived intangible assets 13.7 12.2 13.7 16.5 Our estimated useful lives for our finite-lived intangible assets are as follows: Method of Amortization Useful Life Trade names and trademarks Straight-line 4-30 years Customer and supplier relationships Accelerated 3-20 years Software and other technology related assets Straight-line 3-15 years Covenants not to compete Straight-line 2-5 years Amortization expense for intangibles was $42 million and $96 million during the three and nine months ended September 30, 2018, respectively, and $26 million and $74 million during the three and nine months ended September 30, 2017, respectively. Estimated amortization expense for each of the five years in the period ending December 31, 2022 is $40 million (for the remaining three months of 2018), $136 million , $104 million , $75 million and $62 million , respectively.

Financial Statement Information

Financial Statement Information Property, Plant and Equipment [Table Text Block] (Tables)	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Policy [Policy Text Block]	Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 Property, Plant and Equipment Property, plant and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements that extend the useful life of the related asset are capitalized. As property, plant and equipment are sold or retired, the applicable cost and accumulated depreciation are removed from the accounts and any resulting gain or loss thereon is recognized. Construction in progress consists primarily of building and land improvements at our existing facilities. Depreciation is calculated using the straight-line method over the estimated useful lives or, in the case of leasehold improvements, the term of the related lease and reasonably assured renewal periods, if shorter. Our estimated useful lives are as follows: Land improvements 10-20 years Buildings and improvements 20-40 years Machinery and equipment 3-20 years Computer equipment and software 3-10 years Vehicles and trailers 3-10 years Furniture and fixtures 5-7 years Property, plant and equipment consists of the following (in thousands): September 30, December 31, 2018 2017 Land and improvements $ 189,404 $ 137,790 Buildings and improvements 373,607 233,078 Machinery and equipment 618,209 521,526 Computer equipment and software 142,719 133,753 Vehicles and trailers 177,778 161,269 Furniture and fixtures 52,595 31,794 Leasehold improvements 283,603 257,506 1,837,915 1,476,716 Less—Accumulated depreciation (691,086 ) (606,112 ) Construction in progress 54,174 42,485 Total property, plant and equipment, net $ 1,201,003 $ 913,089 The components of opening property, plant and equipment acquired as part of our acquisition of Stahlgruber in May 2018 are as follows (in thousands): Gross Amount Land and improvements $ 47,281 Buildings and improvements 125,649 Machinery and equipment 49,384 Computer equipment and software 3,760 Vehicles and trailers 643 Furniture and fixtures 28,535 Leasehold improvements 1,890 257,142 Construction in progress 3,519 Total property, plant and equipment $ 260,661 We record depreciation expense associated with our refurbishing, remanufacturing, manufacturing and furnace operations as well as our distribution centers in Cost of goods sold on the Unaudited Condensed Consolidated Statements of Income. All other depreciation expense is reported in Depreciation and amortization. Total depreciation expense for the three and nine months ended September 30, 2018 was $39 million and $115 million , respectively, and $34 million and $93 million during the three and nine months ended September 30, 2017, respectively.
Property, Plant and Equipment [Table Text Block]	Useful Life - Property Plant & Equipment Useful Life Min Useful Life Max Land improvements 10 years 20 years Buildings and improvements 20 years 40 years Machinery and equipment 3 years 20 years Computer equipment and software 3 years 10 years Vehicles and trailers 3 years 10 years Furniture and fixtures 5 years 7 years

Financial Statement Informati_2

Financial Statement Information Finite-Lived Intangible Assets Acquired as Part of Business Combination (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Schedule of Goodwill [Table Text Block]	Intangible assets consist primarily of goodwill (the cost of purchased businesses in excess of the fair value of the identifiable net assets acquired) and other specifically identifiable intangible assets, such as trade names, trademarks, customer and supplier relationships, software and other technology related assets, and covenants not to compete. The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2018 are as follows (in thousands): North America Europe Specialty Total Balance as of January 1, 2018 $ 1,709,354 $ 1,414,898 $ 412,259 $ 3,536,511 Business acquisitions and adjustments to previously recorded goodwill 1,073 1,002,277 (5,720 ) 997,630 Exchange rate effects (3,049 ) (55,901 ) 75 (58,875 ) Balance as of September 30, 2018 $ 1,707,378 $ 2,361,274 $ 406,614 $ 4,475,266 During the nine months ended September 30, 2018, we recorded $ 929 million of goodwill related to our acquisition of Stahlgruber. See Note 2, "Business Combinations" for further information on our acquisitions.
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The components of intangible assets acquired as part of our acquisitions in 2018 are as follows (in thousands): Nine Months Ended September 30, 2018 Stahlgruber Other Acquisitions Total Trade names and trademarks $ 173,946 $ 2,895 $ 176,841 Customer and supplier relationships 78,239 8,194 86,433 Software and other technology related assets 33,344 92 33,436 Total $ 285,529 $ 11,181 $ 296,710
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		16 years 6 months
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life [Table Text Block]	The weighted-average amortization periods for our intangible assets acquired during the nine months ended September 30, 2018 and the year ended December 31, 2017 are as follows (in years): Nine Months Ended Year Ended September 30, 2018 December 31, 2017 Stahlgruber Other Acquisitions Total All Acquisitions Trade names and trademarks 19.9 20.0 19.9 11.2 Customer and supplier relationships 3.0 9.6 3.6 18.6 Software and other technology related assets 6.8 6.0 6.8 11.1 Covenants not to compete - - - 4.4 Total acquired finite-lived intangible assets 13.7 12.2 13.7 16.5

Revenue Recognition Disaggregat

Revenue Recognition Disaggregation of Revenue (Tables)	9 Months Ended
	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table sets forth our revenue by category, with our parts and services revenue further disaggregated by reportable segment (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 North America $ 1,109,067 $ 1,051,470 $ 3,447,074 $ 3,207,001 Europe 1,464,049 952,765 3,781,091 2,659,804 Specialty 388,865 329,522 1,151,172 1,005,776 Parts and services 2,961,981 2,333,757 8,379,337 6,872,581 Other 160,397 132,043 494,556 394,473 Total revenue $ 3,122,378 $ 2,465,800 $ 8,873,893 $ 7,267,054

Revenue Recognition Product War

Revenue Recognition Product Warranty Liability (Tables)	9 Months Ended
	Sep. 30, 2018
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability [Table Text Block]	The changes in the warranty reserve are as follows (in thousands): Balance as of December 31, 2017 $ 23,151 Warranty expense 33,670 Warranty claims (31,980 ) Balance as of September 30, 2018 $ 24,841 The changes in deferred service-type warranty revenue are as follows (in thousands): Balance as of January 1, 2018 $ 19,465 Additional warranty revenue deferred 28,889 Warranty revenue recognized (25,200 ) Balance as of September 30, 2018 $ 23,154

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	The following table summarizes activity related to our RSUs under the Equity Incentive Plan for the nine months ended September 30, 2018: Number Outstanding Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) (1) Unvested as of January 1, 2018 1,624,390 $ 29.94 Granted 601,802 $ 42.58 Vested (698,903 ) $ 30.07 Forfeited / Canceled (33,767 ) $ 33.28 Unvested as of September 30, 2018 1,493,522 $ 34.89 Expected to vest after September 30, 2018 1,344,519 $ 34.88 2.6 $ 42,581
Schedule of Share-based Compensation, Stock Options, Activity	The following table summarizes activity related to our stock options under the Equity Incentive Plan for the nine months ended September 30, 2018: Number Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) (1) Balance as of January 1, 2018 1,738,073 $ 9.20 Exercised (441,495 ) $ 8.54 $ 12,678 Canceled (509 ) $ 32.31 Balance as of September 30, 2018 1,296,069 $ 9.42 1.0 $ 28,862 Exercisable as of September 30, 2018 1,296,069 $ 9.42 1.0 $ 28,862

Earnings Per Share Schedule of

Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted (Tables)	9 Months Ended
	Sep. 30, 2018
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following chart sets forth the computation of earnings per share (in thousands, except per share amounts): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Income from continuing operations $ 134,480 $ 122,381 $ 445,109 $ 414,104 Denominator for basic earnings per share—Weighted-average shares outstanding 318,082 308,909 313,417 308,451 Effect of dilutive securities: RSUs 333 485 452 501 Stock options 987 1,385 1,082 1,543 Denominator for diluted earnings per share—Adjusted weighted-average shares outstanding 319,402 310,779 314,951 310,495 Basic earnings per share from continuing operations $ 0.42 $ 0.40 $ 1.42 $ 1.34 Diluted earnings per share from continuing operations $ 0.42 $ 0.39 $ 1.41 $ 1.33

Earnings Per Share Schedule o_2

Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	The following table sets forth the number of employee stock-based compensation awards outstanding but not included in the computation of diluted earnings per share because their effect would have been antidilutive for the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Antidilutive securities: RSUs 375 — 317 50 Stock options — — — 51

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The components of Accumulated Other Comprehensive Income (Loss) are as follows (in thousands): Three Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) Unrealized (Loss) Gain on Pension Plans Other Comprehensive Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (125,753 ) $ 19,684 $ (10,200 ) $ 208 $ (116,061 ) Pretax (loss) income (23,405 ) 7,681 1,217 — (14,507 ) Income tax effect 2,454 (1,796 ) 41 — 699 Reclassification of unrealized (gain) loss — (7,284 ) 21 — (7,263 ) Reclassification of deferred income taxes — 1,703 (5 ) — 1,698 Other comprehensive income from unconsolidated subsidiaries — — — 643 643 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Three Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (157,353 ) $ 10,324 $ (6,640 ) $ (601 ) $ (154,270 ) Pretax income (loss) 63,769 (15,402 ) — — 48,367 Income tax effect (4,151 ) 5,683 — — 1,532 Reclassification of unrealized loss (gain) — 12,591 (200 ) — 12,391 Reclassification of deferred income taxes — (4,648 ) 50 — (4,598 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,034 ) (1,034 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 ) Nine Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) on Cash Flow Hedges Unrealized (Loss) Gain on Pension Plans Other Comprehensive (Loss) Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (71,933 ) $ 11,538 $ (8,772 ) $ (1,309 ) $ (70,476 ) Pretax (loss) income (82,137 ) 33,901 (102 ) — (48,338 ) Income tax effect 4,507 (7,926 ) (125 ) — (3,544 ) Reclassification of unrealized (gain) loss — (26,117 ) 97 — (26,020 ) Reclassification of deferred income taxes — 6,106 (24 ) — 6,082 Other comprehensive income from unconsolidated subsidiaries — — — 2,160 2,160 Adoption of ASU 2018-02 2,859 2,486 — — 5,345 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Nine Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (272,529 ) $ 8,091 $ (2,737 ) $ — $ (267,175 ) Pretax income (loss) 177,434 (44,749 ) 112 — 132,797 Income tax effect (4,151 ) 16,463 (43 ) — 12,269 Reclassification of unrealized loss (gain) — 45,551 (921 ) — 44,630 Reclassification of deferred income taxes — (16,808 ) 235 — (16,573 ) Disposal of business, net 1,511 — (3,436 ) — (1,925 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,635 ) (1,635 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 ) Net unrealized gains on our interest rate swaps totaling $2 million and $5 million were reclassified to Interest expense, net in our Unaudited Condensed Consolidated Statements of Income during the three and nine months ended September 30, 2018, respectively, compared to a loss of $1 million during the nine months ended September 30, 2017; the amount reclassified to Interest expense, net during the three months ended September 30, 2017 was immaterial. We also reclassified gains of $2 million to Interest expense, net related to the foreign currency forward component of our cross currency swaps during each of the three months ended September 30, 2018 and 2017, and gains of $6 million during each of the nine months ended September 30, 2018 and 2017. Also related to our cross currency swaps, we reclassified gains of $3 million and $15 million to Other income, net in our Unaudited Condensed Consolidated Statements of Income during the three and nine months ended September 30, 2018, respectively, compared to losses of $15 million and $50 million during the three and nine months ended September 30, 2017; these gains and losses offset the impact of the remeasurement of the underlying contracts. The deferred income taxes related to our cash flow hedges were reclassified from Accumulated other comprehensive income (loss) to provision for income taxes. As a result of the adoption of ASU 2018-02 in the first quarter of 2018, we recorded a $5 million reclassification to increase Accumulated Other Comprehensive (Loss) Income and decrease Retained Earnings. See Note 4, "Financial Statement Information" for further information regarding the adoption of ASU 2018-02. The components of Accumulated Other Comprehensive Income (Loss) are as follows (in thousands): Three Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) Unrealized (Loss) Gain on Pension Plans Other Comprehensive Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (125,753 ) $ 19,684 $ (10,200 ) $ 208 $ (116,061 ) Pretax (loss) income (23,405 ) 7,681 1,217 — (14,507 ) Income tax effect 2,454 (1,796 ) 41 — 699 Reclassification of unrealized (gain) loss — (7,284 ) 21 — (7,263 ) Reclassification of deferred income taxes — 1,703 (5 ) — 1,698 Other comprehensive income from unconsolidated subsidiaries — — — 643 643 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Three Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (157,353 ) $ 10,324 $ (6,640 ) $ (601 ) $ (154,270 ) Pretax income (loss) 63,769 (15,402 ) — — 48,367 Income tax effect (4,151 ) 5,683 — — 1,532 Reclassification of unrealized loss (gain) — 12,591 (200 ) — 12,391 Reclassification of deferred income taxes — (4,648 ) 50 — (4,598 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,034 ) (1,034 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 ) Nine Months Ended September 30, 2018 Foreign Unrealized Gain (Loss) on Cash Flow Hedges Unrealized (Loss) Gain on Pension Plans Other Comprehensive (Loss) Income from Unconsolidated Subsidiaries Accumulated Beginning balance $ (71,933 ) $ 11,538 $ (8,772 ) $ (1,309 ) $ (70,476 ) Pretax (loss) income (82,137 ) 33,901 (102 ) — (48,338 ) Income tax effect 4,507 (7,926 ) (125 ) — (3,544 ) Reclassification of unrealized (gain) loss — (26,117 ) 97 — (26,020 ) Reclassification of deferred income taxes — 6,106 (24 ) — 6,082 Other comprehensive income from unconsolidated subsidiaries — — — 2,160 2,160 Adoption of ASU 2018-02 2,859 2,486 — — 5,345 Ending balance $ (146,704 ) $ 19,988 $ (8,926 ) $ 851 $ (134,791 ) Nine Months Ended September 30, 2017 Foreign Unrealized Gain Unrealized (Loss) Gain Other Comprehensive Loss from Unconsolidated Subsidiaries Accumulated Beginning balance $ (272,529 ) $ 8,091 $ (2,737 ) $ — $ (267,175 ) Pretax income (loss) 177,434 (44,749 ) 112 — 132,797 Income tax effect (4,151 ) 16,463 (43 ) — 12,269 Reclassification of unrealized loss (gain) — 45,551 (921 ) — 44,630 Reclassification of deferred income taxes — (16,808 ) 235 — (16,573 ) Disposal of business, net 1,511 — (3,436 ) — (1,925 ) Other comprehensive loss from unconsolidated subsidiaries — — — (1,635 ) (1,635 ) Ending balance $ (97,735 ) $ 8,548 $ (6,790 ) $ (1,635 ) $ (97,612 )

Long-Term Obligations (Tables)

Long-Term Obligations (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule Of Long-Term Obligations	Long-term obligations consist of the following (in thousands): September 30, December 31, 2018 2017 Senior secured credit agreement: Term loans payable $ 590,000 $ 704,800 Revolving credit facilities 1,183,626 1,283,551 U.S. Notes (2023) 600,000 600,000 Euro Notes (2024) 580,200 600,150 Euro Notes (2026/28) 1,160,400 — Receivables securitization facility 100,000 100,000 Notes payable through May 2027 at weighted average interest rates of 1.5% and 1.4%, respectively 38,641 29,146 Other long-term debt at weighted average interest rates of 2.2% and 1.7%, respectively 151,502 110,633 Total debt 4,404,369 3,428,280 Less: long-term debt issuance costs (31,251 ) (21,476 ) Less: current debt issuance costs (4,616 ) (2,824 ) Total debt, net of debt issuance costs 4,368,502 3,403,980 Less: current maturities, net of debt issuance costs (118,365 ) (126,360 ) Long term debt, net of debt issuance costs $ 4,250,137 $ 3,277,620

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Schedule of Derivative Instruments [Table Text Block]	The following table summarizes the notional amounts and fair values of our designated cash flow hedges as of September 30, 2018 and December 31, 2017 (in thousands): Notional Amount Fair Value at September 30, 2018 (USD) Fair Value at December 31, 2017 (USD) September 30, 2018 December 31, 2017 Other Assets Other Noncurrent Liabilities Other Assets Other Noncurrent Liabilities Interest rate swap agreements USD denominated $ 590,000 $ 590,000 $ 25,719 $ — $ 19,102 $ — Cross currency swap agreements USD/euro $ 394,649 $ 406,546 10,881 49,212 5,504 61,492 Total cash flow hedges $ 36,600 $ 49,212 $ 24,606 $ 61,492

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	9 Months Ended
	Sep. 30, 2018
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following tables present information about our financial assets and liabilities measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation inputs we utilized to determine such fair value as of September 30, 2018 and December 31, 2017 (in thousands): Balance as of September 30, 2018 Fair Value Measurements as of September 30, 2018 Level 1 Level 2 Level 3 Assets: Cash surrender value of life insurance $ 53,691 $ — $ 53,691 $ — Rights to acquire Mekonomen shares 28,683 — 28,683 — Interest rate swaps 25,719 — 25,719 — Cross currency swap agreements 10,881 — 10,881 — Total Assets $ 118,974 $ — $ 118,974 $ — Liabilities: Contingent consideration liabilities $ 5,243 $ — $ — $ 5,243 Deferred compensation liabilities 54,419 — 54,419 — Cross currency swap agreements 49,212 — 49,212 — Total Liabilities $ 108,874 $ — $ 103,631 $ 5,243 Balance as of December 31, 2017 Fair Value Measurements as of December 31, 2017 Level 1 Level 2 Level 3 Assets: Cash surrender value of life insurance $ 45,984 $ — $ 45,984 $ — Interest rate swaps 19,102 — 19,102 — Cross currency swap agreements 5,504 — 5,504 — Total Assets $ 70,590 $ — $ 70,590 $ — Liabilities: Contingent consideration liabilities $ 2,636 $ — $ — $ 2,636 Deferred compensation liabilities 47,199 — 47,199 — Cross currency swap agreements 61,492 — 61,492 — Total Liabilities $ 111,327 $ — $ 108,691 $ 2,636

Income Taxes Income Taxes (Tabl

Income Taxes Income Taxes (Tables) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent		25.20%	33.50%
U.S. federal statutory rate	35.00%	21.00%	35.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities		$ (98,521)		$ (65,087)
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional amount				51,000
Tax Cuts and Jobs Act of 2017, tax benefit from decrease to net deferred tax liabilities, provisional amount				$ 73,000
Stahlgruber [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities		$ (97,805)

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	Net periodic benefit expense for our defined benefit plans included the following components for the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Service cost $ 628 $ 1,126 $ 1,612 $ 2,902 Interest cost 996 750 2,442 2,091 Expected return on plan assets (720 ) (507 ) (2,220 ) (1,059 ) Amortization of prior service credit — (71 ) — (201 ) Amortization of actuarial (gain) loss 21 (129 ) 97 (720 ) Net periodic benefit expense $ 925 $ 1,169 $ 1,931 $ 3,013

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Commitments	The future minimum lease commitments under these leases at September 30, 2018 are as follows (in thousands): Three months ending December 31, 2018 $ 72,780 Years ending December 31: 2019 271,642 2020 226,936 2021 179,921 2022 144,700 2023 122,149 Thereafter 689,583 Future Minimum Lease Payments $ 1,707,711

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule Of Financial Performance By Reportable Segment	The following tables present our financial performance by reportable segment for the periods indicated (in thousands): North America Europe Specialty Eliminations Consolidated Three Months Ended September 30, 2018 Revenue: Third Party $ 1,262,657 $ 1,470,856 $ 388,865 $ — $ 3,122,378 Intersegment 142 — 1,196 (1,338 ) — Total segment revenue $ 1,262,799 $ 1,470,856 $ 390,061 $ (1,338 ) $ 3,122,378 Segment EBITDA $ 154,049 $ 129,358 $ 42,937 $ — $ 326,344 Depreciation and amortization (1) 22,151 52,139 7,183 — 81,473 Three Months Ended September 30, 2017 Revenue: Third Party $ 1,181,756 $ 954,522 $ 329,522 $ — $ 2,465,800 Intersegment 187 — 1,072 (1,259 ) — Total segment revenue $ 1,181,943 $ 954,522 $ 330,594 $ (1,259 ) $ 2,465,800 Segment EBITDA $ 152,627 $ 79,294 $ 35,114 $ — $ 267,035 Depreciation and amortization (1) 22,104 32,326 5,472 — 59,902 North America Europe Specialty Eliminations Consolidated Nine Months Ended September 30, 2018 Revenue: Third Party $ 3,927,282 $ 3,795,439 $ 1,151,172 $ — $ 8,873,893 Intersegment 526 — 3,554 (4,080 ) — Total segment revenue $ 3,927,808 $ 3,795,439 $ 1,154,726 $ (4,080 ) $ 8,873,893 Segment EBITDA $ 506,772 $ 315,785 $ 140,974 $ — $ 963,531 Depreciation and amortization (1) 64,985 124,697 21,295 — 210,977 Nine Months Ended September 30, 2017 Revenue: Third Party $ 3,596,108 $ 2,665,170 $ 1,005,776 $ — $ 7,267,054 Intersegment 589 — 3,222 (3,811 ) — Total segment revenue $ 3,596,697 $ 2,665,170 $ 1,008,998 $ (3,811 ) $ 7,267,054 Segment EBITDA $ 502,494 $ 241,537 $ 119,133 $ — $ 863,164 Depreciation and amortization (1) 64,305 85,809 16,394 — 166,508 (1) Amounts presented include depreciation and amortization expense recorded within cost of goods sold.
Reconciliation Of Segment EBITDA To Net Income Table	The table below provides a reconciliation of Net Income to Segment EBITDA (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Net income $ 134,480 $ 122,381 $ 445,109 $ 409,573 Less: net income attributable to noncontrolling interest 378 — 1,040 — Net income attributable to LKQ stockholders 134,102 122,381 444,069 409,573 Subtract: Net loss from discontinued operations — — — (4,531 ) Net income from continuing operations attributable to LKQ stockholders 134,102 122,381 444,069 414,104 Add: Depreciation and amortization 76,701 56,877 196,322 159,178 Depreciation and amortization - cost of goods sold 4,772 3,025 14,655 7,330 Interest expense, net 40,860 25,222 107,647 73,806 Provision for income taxes 46,068 58,189 156,427 206,206 EBITDA 302,503 265,694 919,120 860,624 Subtract: Equity in (losses) earnings of unconsolidated subsidiaries (1) (20,284 ) 2,673 (18,326 ) 3,878 Fair value gain on Mekonomen derivative instrument (1) 2,509 — 2,509 — Gains on bargain purchases (2) — 913 328 3,990 Add: Restructuring and acquisition related expenses (3) 6,614 4,922 26,546 10,371 Inventory step-up adjustment - acquisition related — — 403 — Impairment of net assets held for sale — — 2,438 — Change in fair value of contingent consideration liabilities (548 ) 5 (465 ) 37 Segment EBITDA $ 326,344 $ 267,035 $ 963,531 $ 863,164 (1) See Note 4, "Financial Statement Information," for further information. (2) Reflects the gains on bargain purchases related to our acquisitions of a wholesale business in Europe and Andrew Page. See Note 2, "Business Combinations," for further information. (3) See Note 6, "Restructuring and Acquisition Related Expenses," for further information.
Schedule Of Capital Expenditures By Reportable Segment	The following table presents capital expenditures by reportable segment (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Capital Expenditures North America $ 27,996 $ 31,021 $ 86,864 $ 69,934 Europe 23,904 12,119 69,582 55,253 Specialty 4,442 852 15,317 6,752 Discontinued operations — — — 3,598 Total capital expenditures $ 56,342 $ 43,992 $ 171,763 $ 135,537
Schedule Of Assets By Reportable Segment	The following table presents assets by reportable segment (in thousands): September 30, December 31, 2018 2017 Receivables, net North America $ 437,429 $ 379,666 Europe (1) 696,106 555,372 Specialty 122,341 92,068 Total receivables, net (2) 1,255,876 1,027,106 Inventories North America 1,058,310 1,076,393 Europe (1) 1,391,578 964,068 Specialty 345,006 340,322 Total inventories 2,794,894 2,380,783 Property, Plant and Equipment, net North America 560,918 537,286 Europe (1) 554,550 293,539 Specialty 85,535 82,264 Total property, plant and equipment, net 1,201,003 913,089 Equity Method Investments North America 16,075 336 Europe (3) 141,334 208,068 Total equity method investments 157,409 208,404 Other unallocated assets 6,176,154 4,837,490 Total assets $ 11,585,336 $ 9,366,872
Revenue from External Customers by Geographic Area	The following table sets forth our revenue by geographic area (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Revenue United States $ 1,535,557 $ 1,395,495 $ 4,716,927 $ 4,268,600 United Kingdom 408,474 399,155 1,294,155 1,171,829 Germany 415,748 549 564,698 862 Other countries 762,599 670,601 2,298,113 1,825,763 Total revenue $ 3,122,378 $ 2,465,800 $ 8,873,893 $ 7,267,054
Schedule Of Tangible Long-Lived Assets By Geographic Area	The following table sets forth our tangible long-lived assets by geographic area (in thousands): September 30, December 31, 2018 2017 Long-lived Assets United States $ 609,562 $ 583,236 Germany 210,344 41 United Kingdom 170,940 178,021 Other countries 210,157 151,791 Total long-lived assets $ 1,201,003 $ 913,089

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Condensed Consolidating Financial Information [Abstract]
Consolidated Condensed Statements of Income	LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Three Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 1,550,301 $ 1,609,525 $ (37,448 ) $ 3,122,378 Cost of goods sold — 934,913 1,027,715 (37,448 ) 1,925,180 Gross margin — 615,388 581,810 — 1,197,198 Selling, general and administrative expenses 6,725 434,965 437,460 — 879,150 Restructuring and acquisition related expenses — 1,638 4,976 — 6,614 Depreciation and amortization 34 25,238 51,429 — 76,701 Operating (loss) income (6,759 ) 153,547 87,945 — 234,733 Other expense (income): Interest expense (income), net 16,191 (193 ) 24,862 — 40,860 Intercompany interest (income) expense, net (15,121 ) 10,014 5,107 — — Other income, net (178 ) (3,514 ) (3,267 ) — (6,959 ) Total other expense, net 892 6,307 26,702 — 33,901 (Loss) income before (benefit) provision for income taxes (7,651 ) 147,240 61,243 — 200,832 (Benefit) provision for income taxes (12,008 ) 41,875 16,201 — 46,068 Equity in losses of unconsolidated subsidiaries — (156 ) (20,128 ) — (20,284 ) Equity in earnings of subsidiaries 129,745 4,467 — (134,212 ) — Net income 134,102 109,676 24,914 (134,212 ) 134,480 Less: net income attributable to noncontrolling interest — — 378 — 378 Net income attributable to LKQ stockholders $ 134,102 $ 109,676 $ 24,536 $ (134,212 ) $ 134,102 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Three Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 1,433,742 $ 1,069,682 $ (37,624 ) $ 2,465,800 Cost of goods sold — 861,078 685,470 (37,624 ) 1,508,924 Gross margin — 572,664 384,212 — 956,876 Selling, general and administrative expenses 7,861 394,926 293,191 — 695,978 Restructuring and acquisition related expenses — 1,473 3,449 — 4,922 Depreciation and amortization 29 25,005 31,843 — 56,877 Operating (loss) income (7,890 ) 151,260 55,729 — 199,099 Other expense (income): Interest expense, net 16,232 57 8,933 — 25,222 Intercompany interest (income) expense, net (2,389 ) (2,814 ) 5,203 — — Gain on bargain purchase — — (913 ) — (913 ) Other expense (income), net 32 (4,011 ) 872 — (3,107 ) Total other expense (income), net 13,875 (6,768 ) 14,095 — 21,202 (Loss) income before (benefit) provision for income taxes (21,765 ) 158,028 41,634 — 177,897 (Benefit) provision for income taxes (8,436 ) 56,920 9,705 — 58,189 Equity in earnings of unconsolidated subsidiaries — — 2,673 — 2,673 Equity in earnings of subsidiaries 135,710 6,674 — (142,384 ) — Net income $ 122,381 $ 107,782 $ 34,602 $ (142,384 ) $ 122,381 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 4,768,292 $ 4,216,417 $ (110,816 ) $ 8,873,893 Cost of goods sold — 2,869,499 2,702,162 (110,816 ) 5,460,845 Gross margin — 1,898,793 1,514,255 — 3,413,048 Selling, general and administrative expenses 25,538 1,292,455 1,154,092 — 2,472,085 Restructuring and acquisition related expenses — 1,968 24,578 — 26,546 Depreciation and amortization 84 74,102 122,136 — 196,322 Operating (loss) income (25,622 ) 530,268 213,449 — 718,095 Other expense (income): Interest expense (income), net 52,004 (94 ) 55,737 — 107,647 Intercompany interest (income) expense, net (45,927 ) 29,559 16,368 — — Gains on bargain purchases — — (328 ) — (328 ) Other (income) expense, net (1,076 ) (13,793 ) 5,783 — (9,086 ) Total other expense, net 5,001 15,672 77,560 — 98,233 (Loss) income before (benefit) provision for income taxes (30,623 ) 514,596 135,889 — 619,862 (Benefit) provision for income taxes (19,656 ) 141,295 34,788 — 156,427 Equity in losses of unconsolidated subsidiaries — (156 ) (18,170 ) — (18,326 ) Equity in earnings of subsidiaries 455,036 14,028 — (469,064 ) — Net income 444,069 387,173 82,931 (469,064 ) 445,109 Less: net income attributable to noncontrolling interest — — 1,040 — 1,040 Net income attributable to LKQ stockholders $ 444,069 $ 387,173 $ 81,891 $ (469,064 ) $ 444,069	LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 4,768,292 $ 4,216,417 $ (110,816 ) $ 8,873,893 Cost of goods sold — 2,869,499 2,702,162 (110,816 ) 5,460,845 Gross margin — 1,898,793 1,514,255 — 3,413,048 Selling, general and administrative expenses 25,538 1,292,455 1,154,092 — 2,472,085 Restructuring and acquisition related expenses — 1,968 24,578 — 26,546 Depreciation and amortization 84 74,102 122,136 — 196,322 Operating (loss) income (25,622 ) 530,268 213,449 — 718,095 Other expense (income): Interest expense (income), net 52,004 (94 ) 55,737 — 107,647 Intercompany interest (income) expense, net (45,927 ) 29,559 16,368 — — Gains on bargain purchases — — (328 ) — (328 ) Other (income) expense, net (1,076 ) (13,793 ) 5,783 — (9,086 ) Total other expense, net 5,001 15,672 77,560 — 98,233 (Loss) income before (benefit) provision for income taxes (30,623 ) 514,596 135,889 — 619,862 (Benefit) provision for income taxes (19,656 ) 141,295 34,788 — 156,427 Equity in losses of unconsolidated subsidiaries — (156 ) (18,170 ) — (18,326 ) Equity in earnings of subsidiaries 455,036 14,028 — (469,064 ) — Net income 444,069 387,173 82,931 (469,064 ) 445,109 Less: net income attributable to noncontrolling interest — — 1,040 — 1,040 Net income attributable to LKQ stockholders $ 444,069 $ 387,173 $ 81,891 $ (469,064 ) $ 444,069 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Income (In thousands) For the Nine Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Revenue $ — $ 4,374,693 $ 3,001,386 $ (109,025 ) $ 7,267,054 Cost of goods sold — 2,613,540 1,910,561 (109,025 ) 4,415,076 Gross margin — 1,761,153 1,090,825 — 2,851,978 Selling, general and administrative expenses 26,209 1,165,897 810,959 — 2,003,065 Restructuring and acquisition related expenses — 4,010 6,361 — 10,371 Depreciation and amortization 89 73,072 86,017 — 159,178 Operating (loss) income (26,298 ) 518,174 187,488 — 679,364 Other expense (income): Interest expense, net 48,904 281 24,621 — 73,806 Intercompany interest (income) expense, net (10,221 ) (4,530 ) 14,751 — — Gains on bargain purchases — — (3,990 ) — (3,990 ) Other expense (income), net 286 (8,247 ) 1,077 — (6,884 ) Total other expense (income), net 38,969 (12,496 ) 36,459 — 62,932 (Loss) income from continuing operations before (benefit) provision for income taxes (65,267 ) 530,670 151,029 — 616,432 (Benefit) provision for income taxes (27,034 ) 200,321 32,919 — 206,206 Equity in earnings of unconsolidated subsidiaries — — 3,878 — 3,878 Equity in earnings of subsidiaries 452,337 17,282 — (469,619 ) — Income from continuing operations 414,104 347,631 121,988 (469,619 ) 414,104 Net (loss) income from discontinued operations (4,531 ) (4,531 ) 2,050 2,481 (4,531 ) Net income $ 409,573 $ 343,100 $ 124,038 $ (467,138 ) $ 409,573
Consolidated Condensed Statements of Comprehensive Income (Loss)	LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Comprehensive Income (In thousands) For the Three Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 134,102 $ 109,676 $ 24,914 $ (134,212 ) $ 134,480 Less: net income attributable to noncontrolling interest — — 378 — 378 Net income attributable to LKQ stockholders 134,102 109,676 24,536 (134,212 ) 134,102 Other comprehensive (loss) income: Foreign currency translation, net of tax (20,951 ) 1,686 (23,901 ) 22,215 (20,951 ) Net change in unrealized gains/losses on cash flow hedges, net of tax 304 — — — 304 Net change in unrealized gains/losses on pension plans, net of tax 1,274 1,246 28 (1,274 ) 1,274 Net change in other comprehensive income from unconsolidated subsidiaries 643 — 643 (643 ) 643 Other comprehensive (loss) income (18,730 ) 2,932 (23,230 ) 20,298 (18,730 ) Comprehensive income 115,372 112,608 1,684 (113,914 ) 115,750 Less: comprehensive income attributable to noncontrolling interest — — 378 — 378 Comprehensive income attributable to LKQ stockholders $ 115,372 $ 112,608 $ 1,306 $ (113,914 ) $ 115,372 For the Three Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 122,381 $ 107,782 $ 34,602 $ (142,384 ) $ 122,381 Other comprehensive income (loss): Foreign currency translation, net of tax 59,618 3,590 62,734 (66,324 ) 59,618 Net change in unrecognized gains/losses on cash flow hedges, net of tax (1,776 ) — — — (1,776 ) Net change in unrealized gains/losses on pension plans, net of tax (150 ) — (150 ) 150 (150 ) Net change in other comprehensive loss from unconsolidated subsidiaries (1,034 ) — (1,034 ) 1,034 (1,034 ) Total other comprehensive income 56,658 3,590 61,550 (65,140 ) 56,658 Total comprehensive income $ 179,039 $ 111,372 $ 96,152 $ (207,524 ) $ 179,039 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Comprehensive Income (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 444,069 $ 387,173 $ 82,931 $ (469,064 ) $ 445,109 Less: net income attributable to noncontrolling interest — — 1,040 — 1,040 Net income attributable to LKQ stockholders 444,069 387,173 81,891 (469,064 ) 444,069 Other comprehensive (loss) income: Foreign currency translation, net of tax (77,630 ) (2,800 ) (81,456 ) 84,256 (77,630 ) Net change in unrealized gains/losses on cash flow hedges, net of tax 5,964 — — — 5,964 Net change in unrealized gains/losses on pension plans, net of tax (154 ) (239 ) 85 154 (154 ) Net change in other comprehensive income from unconsolidated subsidiaries 2,160 — 2,160 (2,160 ) 2,160 Other comprehensive loss (69,660 ) (3,039 ) (79,211 ) 82,250 (69,660 ) Comprehensive income 374,409 384,134 3,720 (386,814 ) 375,449 Less: comprehensive income attributable to noncontrolling interest — — 1,040 — 1,040 Comprehensive income attributable to LKQ stockholders $ 374,409 $ 384,134 $ 2,680 $ (386,814 ) $ 374,409	LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Comprehensive Income (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 444,069 $ 387,173 $ 82,931 $ (469,064 ) $ 445,109 Less: net income attributable to noncontrolling interest — — 1,040 — 1,040 Net income attributable to LKQ stockholders 444,069 387,173 81,891 (469,064 ) 444,069 Other comprehensive (loss) income: Foreign currency translation, net of tax (77,630 ) (2,800 ) (81,456 ) 84,256 (77,630 ) Net change in unrealized gains/losses on cash flow hedges, net of tax 5,964 — — — 5,964 Net change in unrealized gains/losses on pension plans, net of tax (154 ) (239 ) 85 154 (154 ) Net change in other comprehensive income from unconsolidated subsidiaries 2,160 — 2,160 (2,160 ) 2,160 Other comprehensive loss (69,660 ) (3,039 ) (79,211 ) 82,250 (69,660 ) Comprehensive income 374,409 384,134 3,720 (386,814 ) 375,449 Less: comprehensive income attributable to noncontrolling interest — — 1,040 — 1,040 Comprehensive income attributable to LKQ stockholders $ 374,409 $ 384,134 $ 2,680 $ (386,814 ) $ 374,409 For the Nine Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Net income $ 409,573 $ 343,100 $ 124,038 $ (467,138 ) $ 409,573 Other comprehensive income (loss): Foreign currency translation, net of tax 174,794 17,565 176,769 (194,334 ) 174,794 Net change in unrecognized gains/losses on cash flow hedges, net of tax 457 (133 ) — 133 457 Net change in unrealized gains/losses on pension plans, net of tax (4,053 ) (3,253 ) (800 ) 4,053 (4,053 ) Net change in other comprehensive loss from unconsolidated subsidiaries (1,635 ) — (1,635 ) 1,635 (1,635 ) Total other comprehensive income 169,563 14,179 174,334 (188,513 ) 169,563 Total comprehensive income $ 579,136 $ 357,279 $ 298,372 $ (655,651 ) $ 579,136
Consolidated Condensed Balance Sheets	LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Balance Sheets (In thousands) September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 48,265 $ 31,082 $ 261,999 $ — $ 341,346 Receivables, net 341 366,781 888,754 — 1,255,876 Intercompany receivables, net 7,173 — 20,573 (27,746 ) — Inventories — 1,323,201 1,471,693 — 2,794,894 Prepaid expenses and other current assets 15,452 94,787 90,705 — 200,944 Total current assets 71,231 1,815,851 2,733,724 (27,746 ) 4,593,060 Property, plant and equipment, net 845 589,898 610,260 — 1,201,003 Intangible assets: Goodwill — 2,005,560 2,469,706 — 4,475,266 Other intangibles, net 286 280,229 672,857 — 953,372 Investment in subsidiaries 5,351,986 114,721 — (5,466,707 ) — Intercompany notes receivable 1,067,356 14,958 — (1,082,314 ) — Equity method investments — 16,075 141,334 — 157,409 Other assets 90,293 38,434 76,499 — 205,226 Total assets $ 6,581,997 $ 4,875,726 $ 6,704,380 $ (6,576,767 ) $ 11,585,336 Liabilities and Stockholders’ Equity Current liabilities: Accounts payable $ 2,615 $ 345,660 $ 593,472 $ — $ 941,747 Intercompany payables, net — 20,573 7,173 (27,746 ) — Accrued expenses: Accrued payroll-related liabilities 7,169 48,463 97,904 — 153,536 Other accrued expenses 12,656 106,543 239,013 — 358,212 Refund liability — 54,554 52,178 — 106,732 Other current liabilities 283 18,210 38,595 — 57,088 Current portion of long-term obligations — 2,317 116,048 — 118,365 Total current liabilities 22,723 596,320 1,144,383 (27,746 ) 1,735,680 Long-term obligations, excluding current portion 1,569,387 14,027 2,666,723 — 4,250,137 Intercompany notes payable — 617,389 464,925 (1,082,314 ) — Deferred income taxes 9,715 115,924 199,898 — 325,537 Other noncurrent liabilities 139,712 98,133 138,721 — 376,566 Stockholders' equity: Total Company stockholders’ equity 4,840,460 3,433,933 2,032,774 (5,466,707 ) 4,840,460 Noncontrolling interest — — 56,956 — 56,956 Total stockholders’ equity 4,840,460 3,433,933 2,089,730 (5,466,707 ) 4,897,416 Total liabilities and stockholders' equity $ 6,581,997 $ 4,875,726 $ 6,704,380 $ (6,576,767 ) $ 11,585,336 LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Balance Sheets (In thousands) December 31, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 34,360 $ 35,131 $ 210,275 $ — $ 279,766 Receivables, net — 290,958 736,148 — 1,027,106 Intercompany receivables, net 2,669 3,010 230 (5,909 ) — Inventories — 1,334,766 1,046,017 — 2,380,783 Prepaid expenses and other current assets 34,136 44,849 55,494 — 134,479 Total current assets 71,165 1,708,714 2,048,164 (5,909 ) 3,822,134 Property, plant and equipment, net 910 563,262 348,917 — 913,089 Intangible assets: Goodwill — 2,010,209 1,526,302 — 3,536,511 Other intangibles, net — 291,036 452,733 — 743,769 Investment in subsidiaries 5,952,687 102,931 — (6,055,618 ) — Intercompany notes receivable 1,156,550 782,638 — (1,939,188 ) — Equity method investments — 336 208,068 — 208,404 Other assets 70,590 33,597 38,778 — 142,965 Total assets $ 7,251,902 $ 5,492,723 $ 4,622,962 $ (8,000,715 ) $ 9,366,872 Liabilities and Stockholders’ Equity Current liabilities: Accounts payable $ 5,742 $ 340,951 $ 441,920 $ — $ 788,613 Intercompany payables, net — 230 5,679 (5,909 ) — Accrued expenses: Accrued payroll-related liabilities 9,448 65,811 68,165 — 143,424 Other accrued expenses 5,219 95,900 117,481 — 218,600 Other current liabilities 282 27,066 18,379 — 45,727 Current portion of long-term obligations 16,468 1,912 107,980 — 126,360 Total current liabilities 37,159 531,870 759,604 (5,909 ) 1,322,724 Long-term obligations, excluding current portion 2,095,826 7,372 1,174,422 — 3,277,620 Intercompany notes payable 750,000 677,708 511,480 (1,939,188 ) — Deferred income taxes 12,402 116,021 123,936 — 252,359 Other noncurrent liabilities 158,346 101,189 47,981 — 307,516 Stockholders' equity: Total Company stockholders’ equity 4,198,169 4,058,563 1,997,055 (6,055,618 ) 4,198,169 Noncontrolling interest — — 8,484 — 8,484 Total stockholders’ equity 4,198,169 4,058,563 2,005,539 (6,055,618 ) 4,206,653 Total liabilities and stockholders' equity $ 7,251,902 $ 5,492,723 $ 4,622,962 $ (8,000,715 ) $ 9,366,872
Consolidated Condensed Statements of Cash Flows		LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Cash Flows (In thousands) For the Nine Months Ended September 30, 2018 Parent Guarantors Non-Guarantors Eliminations Consolidated CASH FLOWS FROM OPERATING ACTIVITIES: Net cash provided by operating activities $ 334,226 $ 142,626 $ 97,506 $ (53,191 ) $ 521,167 CASH FLOWS FROM INVESTING ACTIVITIES: Purchases of property, plant and equipment (315 ) (93,063 ) (78,385 ) — (171,763 ) Investment and intercompany note activity with subsidiaries 73,096 — — (73,096 ) — Return of investment in subsidiaries 152,443 — — (152,443 ) — Acquisitions, net of cash acquired — (2,888 ) (1,203,179 ) — (1,206,067 ) Investments in unconsolidated subsidiaries — (11,066 ) — — (11,066 ) Receipts of deferred purchase price on receivables under factoring arrangements — 224,753 9,410 (224,753 ) 9,410 Other investing activities, net 887 2,162 4,921 — 7,970 Net cash provided by (used in) investing activities 226,111 119,898 (1,267,233 ) (450,292 ) (1,371,516 ) CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from exercise of stock options 3,772 — — — 3,772 Taxes paid related to net share settlements of stock-based compensation awards (4,768 ) — — — (4,768 ) Debt issuance costs (1,354 ) — (15,584 ) — (16,938 ) Proceeds from issuance of Euro Notes (2026/28) — — 1,232,100 — 1,232,100 Borrowings under revolving credit facilities 304,000 — 721,496 — 1,025,496 Repayments under revolving credit facilities (732,897 ) — (377,138 ) — (1,110,035 ) Repayments under term loans (114,800 ) — — — (114,800 ) (Repayments) borrowings of other debt, net (385 ) 101 (38,411 ) — (38,695 ) Other financing activities, net — — 3,182 — 3,182 Investment and intercompany note activity with parent — (62,763 ) (10,333 ) 73,096 — Dividends — (203,448 ) (226,939 ) 430,387 — Net cash (used in) provided by financing activities (546,432 ) (266,110 ) 1,288,373 503,483 979,314 Effect of exchange rate changes on cash and cash equivalents — (463 ) (66,922 ) — (67,385 ) Net increase (decrease) in cash and cash equivalents 13,905 (4,049 ) 51,724 — 61,580 Cash and cash equivalents, beginning of period 34,360 35,131 210,275 — 279,766 Cash and cash equivalents, end of period $ 48,265 $ 31,082 $ 261,999 $ — $ 341,346	LKQ CORPORATION AND SUBSIDIARIES Unaudited Condensed Consolidating Statements of Cash Flows (In thousands) For the Nine Months Ended September 30, 2017 Parent Guarantors Non-Guarantors Eliminations Consolidated CASH FLOWS FROM OPERATING ACTIVITIES: Net cash provided by operating activities $ 227,314 $ 162,114 $ 108,095 $ (48,280 ) $ 449,243 CASH FLOWS FROM INVESTING ACTIVITIES: Purchases of property, plant and equipment (509 ) (70,292 ) (64,736 ) — (135,537 ) Investment and intercompany note activity with subsidiaries 296,561 — — (296,561 ) — Acquisitions, net of cash acquired — (79,496 ) (173,171 ) — (252,667 ) Proceeds from disposals of business/investment — 305,740 (4,443 ) — 301,297 Investments in unconsolidated subsidiaries — (2,200 ) (4,914 ) — (7,114 ) Receipts of deferred purchase price on receivables under factoring arrangements (1) — 226,395 — (226,395 ) — Other investing activities, net — 3,100 6,764 — 9,864 Net cash provided by (used in) investing activities 296,052 383,247 (240,500 ) (522,956 ) (84,157 ) CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from exercise of stock options 6,465 — — — 6,465 Taxes paid related to net share settlements of stock-based compensation awards (5,095 ) — — — (5,095 ) Borrowings under revolving credit facilities 187,000 — 237,976 — 424,976 Repayments under revolving credit facilities (694,896 ) — (75,988 ) — (770,884 ) Repayments under term loans (27,884 ) — — — (27,884 ) Borrowings under receivables securitization facility — — 8,525 — 8,525 Repayments under receivables securitization facility — — (9,925 ) — (9,925 ) (Repayments) borrowings of other debt, net (1,700 ) (1,238 ) 27,460 — 24,522 Payments of other obligations — (1,336 ) (743 ) — (2,079 ) Other financing activities, net — 5,000 (684 ) — 4,316 Investment and intercompany note activity with parent — (286,530 ) (10,031 ) 296,561 — Dividends — (274,675 ) — 274,675 — Net cash (used in) provided by financing activities (536,110 ) (558,779 ) 176,590 571,236 (347,063 ) Effect of exchange rate changes on cash and cash equivalents — 322 22,216 — 22,538 Net (decrease) increase in cash and cash equivalents (12,744 ) (13,096 ) 66,401 — 40,561 Cash and cash equivalents of continuing operations, beginning of period 33,030 35,360 159,010 — 227,400 Add: Cash and cash equivalents of discontinued operations, beginning of period — 149 6,967 — 7,116 Cash and cash equivalents of continuing and discontinued operations, beginning of period 33,030 35,509 165,977 — 234,516 Cash and cash equivalents, end of period $ 20,286 $ 22,413 $ 232,378 $ — $ 275,077

Business Combinations - Additio

Business Combinations - Additional Information (Details) $ in Thousands, € in Millions	1 Months Ended		3 Months Ended			4 Months Ended	6 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2017	Jul. 30, 2017	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)shares	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2018EUR (€)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2018EUR (€)	Apr. 09, 2018USD ($)	Apr. 09, 2018EUR (€)
Business Acquisition
Cash used in acquisitions, net of cash acquired									$ 1,206,067	$ 252,667	$ 513,088
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			$ 6,948			$ 6,948			6,948		$ 20,187
Revenue			3,122,378		$ 2,465,800				8,873,893	7,267,054
Operating Income (Loss)			234,733		199,099				718,095	679,364
Number of acquisitions											26
Contingent consideration liabilities			(3,107)			(3,107)			(3,107)		$ (6,234)
Goodwill, Purchase Accounting Adjustments			1,000
Warn Industries [Member]
Business Acquisition
Business Acquisition, Effective Date of Acquisition	Nov. 30, 2017
Stahlgruber [Member]
Business Acquisition
Business Acquisition, Effective Date of Acquisition				May 30, 2018
Business Acquisition, Name of Acquired Entity							Stahlgruber GmbH	Stahlgruber GmbH
Total acquisition date fair value of the consideration for acquisitions							$ 1,400,000	€ 1,200
Cash used in acquisitions, net of cash acquired				$ 1,100,000				€ 1,000	1,127,445
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned				$ 251,000			$ 251,000					€ 215
Debt Instrument, Face Amount													$ 1,200,000	€ 1,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares				8,055,569
Business Acquisition, Goodwill, Expected Tax Deductible Amount			292,000			292,000			292,000
Revenue						637,000
Operating Income (Loss)						34,000
Goodwill, Acquired During Period									929,000
Other Than Stahlgruber [Member]
Business Acquisition
Total acquisition date fair value of the consideration for acquisitions									86,000
Cash used in acquisitions, net of cash acquired									76,000
Revenue									19,000
Operating Income (Loss)									2,000
Goodwill, Acquired During Period									72,000
All 2018 Acquisitions excluding Stahlgruber [Member]
Business Acquisition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			7,000			7,000			$ 7,000
Wholesale - NA [Member]
Business Acquisition
Number of acquisitions									1		6
Wholesale Europe [Member]
Business Acquisition
Number of acquisitions									7		16
2017 acquisitions and adjustments to 2016 acquisitions [Member]
Business Acquisition
Total acquisition date fair value of the consideration for acquisitions											$ 542,000
Cash used in acquisitions, net of cash acquired											510,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities											20,000
All 2017 Acquisitions [Member]
Business Acquisition
Business Acquisition, Goodwill, Expected Tax Deductible Amount											21,000
Goodwill, Acquired During Period											$ 307,000
Specialty
Business Acquisition
Number of acquisitions											4
Aftermarket Parts Distribution Businesses In Europe [Member]
Business Acquisition
Business Acquisition, Effective Date of Acquisition		Jul. 31, 2017
Number of acquisitions											4
Payment To Former Owners [Member]
Business Acquisition
Contingent consideration liabilities			(3,000)			(3,000)			$ (3,000)		$ (6,000)
Payment To Former Owners [Member] | 2017 acquisitions and adjustments to 2016 acquisitions [Member]
Business Acquisition
Contingent consideration liabilities											(19,000)
Payment To Former Owners [Member] | Maximum | All 2018 Acquisitions excluding Stahlgruber [Member]
Business Acquisition
Contingent consideration liabilities			(5,000)			$ (5,000)			(5,000)
Non-interest Bearing [Member] | 2017 acquisitions and adjustments to 2016 acquisitions [Member]
Business Acquisition
Contingent consideration liabilities											$ (5,000)
Specialty
Business Acquisition
Revenue			$ 390,061		$ 330,594				$ 1,154,726	$ 1,008,998

Purchase Price Allocations for

Purchase Price Allocations for Acquisitions (Details) $ in Thousands, € in Millions	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2018EUR (€)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Business Acquisition
Receivables				$ 156,348		$ 73,782
Receivable reserves				(3,693)		(7,032)
Inventories (3)				386,296		150,342
Prepaid expenses and other current assets				11,343		(295)
Property, plant and equipment				266,750		41,039
Goodwill				4,475,266		3,536,511
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						314,817
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				301,844		181,216
Other assets				16,662		3,257
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities				(98,521)		(65,087)
Current liabilities assumed				(363,883)		(111,484)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt				(70,262)		(33,586)
Other noncurrent liabilities assumed				(91,682)		(1,917)
Consolidation, Less Than Wholly Owned Subsidiary, Non Controlling Interest Acquired, Value				(44,250)
Contingent consideration liabilities				(3,107)		(6,234)
Other purchase price obligations				1,504		(5,074)
Stock Issued During Period, Value, Acquisitions				(251,334)
Notes issued				(6,948)		(20,187)
Settlement of pre-existing balances						242
Gains on bargain purchases		$ (913)		(328)	$ (3,990)	3,870
Settlement of other purchase price obligations (non-interest bearing)				1,698		3,159
Cash used in acquisitions, net of cash acquired				1,206,067	$ 252,667	513,088
Warn Industries [Member]
Business Acquisition
Increase (Decrease) in Intangible Assets, Current				5,000
Inventory step-up adjustment - acquisition related						4,000
2017 Acquisitions Excluding Warn [Member]
Business Acquisition
Business Acquisition Cost Of Acquired Entity Other Purchase Price Obligations Non Interest Bearing, Post Purchase Adjustment				(4,000)
2017 acquisitions and adjustments to 2016 acquisitions [Member]
Business Acquisition
Notes issued						(20,000)
Cash used in acquisitions, net of cash acquired						510,000
Stahlgruber [Member]
Business Acquisition
Receivables				140,979
Receivable reserves				(2,818)
Inventories (3)				374,056
Prepaid expenses and other current assets				9,537
Property, plant and equipment				260,661
Goodwill				929,376
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				285,529
Other assets				16,625
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities				(97,805)
Current liabilities assumed				(343,221)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt				(65,852)
Other noncurrent liabilities assumed				(81,689)
Consolidation, Less Than Wholly Owned Subsidiary, Non Controlling Interest Acquired, Value				(44,250)
Other purchase price obligations				(2,349)
Stock Issued During Period, Value, Acquisitions				(251,334)
Cash used in acquisitions, net of cash acquired	$ 1,100,000		€ 1,000	1,127,445
Defined Benefit Plan, Benefit Obligation, Business Combination				75,000
All 2018 Acquisitions and adjustments to 2017 acquisitions excluding Stahlgruber
Business Acquisition
Receivables				15,369
Receivable reserves				(875)
Inventories (3)				12,240
Prepaid expenses and other current assets				1,806
Property, plant and equipment				6,089
Goodwill				68,254
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				16,315
Other assets				37
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities				(716)
Current liabilities assumed				(20,662)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt				(4,410)
Other noncurrent liabilities assumed				(9,993)
Contingent consideration liabilities				(3,107)
Other purchase price obligations				3,853
Notes issued				(6,948)
Gains on bargain purchases				328
Settlement of other purchase price obligations (non-interest bearing)				1,698
Cash used in acquisitions, net of cash acquired				78,622
All 2018 and 2017 Acquisitions [Member]
Business Acquisition
Goodwill				$ 997,630
Rhiag [Member]
Business Acquisition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						6,000
PGW [Member]
Business Acquisition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						3,000
Andrew Page
Business Acquisition
Gain on bargain purchase						$ (2,000)

Pro Forma Effect of Businesses

Pro Forma Effect of Businesses Acquired (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition
Revenue, as reported	$ 3,122,378	$ 2,465,800		$ 8,873,893	$ 7,267,054
Income from continuing operations	$ 134,480	$ 122,381		$ 445,109	$ 414,104
Basic earnings per share from continuing operations	$ 0.42	$ 0.40		$ 1.42	$ 1.34
Diluted earnings per share from continuing operations	$ 0.42	0.39		$ 1.41	1.33
All 2018 Acquisitions [Member]
Business Acquisition
Business Acquisition Pro Forma Net Income attributable to noncontrolling interest				$ 2,799
Business Acquisition Pro Forma Income Loss From Share Issuance attributable to noncontrolling interest, Per Basic Share Effect				$ 0.01
Business Acquisition Pro Forma Income Loss From Share Issuance attributable to noncontrolling interest, Per Diluted Share Effect				0.01
Stahlgruber [Member]
Business Acquisition
Revenue, as reported			$ 637,000
Business Acquisition Pro Forma Income Loss From Share Issuance, Per Basic Share Effect		(0.01)		(0.02)	(0.03)
Business Acquisition Pro Forma Income Loss From Share Issuance, Per Diluted Share Effect		$ (0.01)		$ (0.02)	$ (0.03)
All 2017 acquisitions [Member]
Business Acquisition
Business Acquisition Pro Forma Net Income attributable to noncontrolling interest		$ 888			$ 2,157
Acquisition Related Costs, Net of Tax	$ 681	$ 2,301		$ 13,986	$ 5,010
Business Acquisition Pro Forma Income Loss From Acquisition Related Costs, Net of Tax, Per Basic Share Effect	$ 0	$ 0.01		$ 0.04	$ 0.02
Business Acquisition Pro Forma Income Loss From Share Issuance attributable to noncontrolling interest, Per Basic Share Effect		0			0.01
Business Acquisition Pro Forma Income Loss From Acquisition Related Costs, Net of Tax, Per Diluted Share Effect	$ 0	0.01		$ 0.04	0.02
Business Acquisition Pro Forma Income Loss From Share Issuance attributable to noncontrolling interest, Per Diluted Share Effect		$ 0			$ 0.01
Pro Forma [Member]
Business Acquisition
Revenue, as reported	$ 3,129,019	$ 3,023,019		$ 9,740,430	$ 8,943,981
Income from continuing operations	140,376	134,221		474,797	441,426
Income (Loss) from Continuing Operations, Net of Tax, Excluding Portion Attributable to Noncontrolling Interest	$ 140,376	$ 133,333		$ 471,998	$ 439,269
Basic earnings per share from continuing operations	$ 0.44	$ 0.42		$ 1.49	$ 1.39
Income (Loss) from Continuing Operations attributable to LKQ stockholders, Per Basic Share	0.44	0.42		1.49	1.39
Pro forma earnings per share from continuing operations, diluted (3)	0.44	0.42		1.49	1.39
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations attributable to LKQ stockholders, Net of Tax, Per Share, Diluted	$ 0.44	$ 0.42		$ 1.48	$ 1.38
Pro Forma [Member] | Stahlgruber [Member]
Business Acquisition
Revenue, as reported		$ 473,326		$ 815,405	$ 1,289,083
Income from continuing operations	$ 5,054	$ 6,061		$ 14,114	$ 5,298
Basic earnings per share from continuing operations	$ 0.02	$ 0.02		$ 0.05	$ 0.02
Diluted earnings per share from continuing operations	$ 0.02	$ 0.02		$ 0.04	$ 0.02
Pro Forma [Member] | All 2018 Acquisitions excluding Stahlgruber [Member]
Business Acquisition
Revenue, as reported	$ 6,641			$ 51,132
Income from continuing operations	$ 161			$ 1,588
Basic earnings per share from continuing operations	$ 0			$ 0.01
Diluted earnings per share from continuing operations	$ 0			$ 0.01
Pro Forma [Member] | All 2018 and 2017 acquisitions excluding Stahlgruber [Member]
Business Acquisition
Revenue, as reported		$ 83,893			$ 387,844
Income from continuing operations		$ 3,478			$ 17,014
Basic earnings per share from continuing operations		$ 0.01			$ 0.06
Diluted earnings per share from continuing operations		$ 0.01			$ 0.05

Discontinued Operations Results

Discontinued Operations Results Of Discontinued Operations (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended	9 Months Ended
	Mar. 01, 2017	Mar. 31, 2017	Sep. 30, 2017
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net loss from discontinued operations			$ (4,531)
DCO Footnote 2 [Abstract]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			(8,580)
PGW [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Revenue			111,130
Disposal Group, Including Discontinued Operation, Costs of Goods Sold			100,084
Disposal Group, Including Discontinued Operation, General and Administrative Expense			8,369
Disposal Group, Including Discontinued Operation, Operating Income (Loss)			2,677
Disposal Group, Including Discontinued Operation, Other Expense			1,204
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax			3,881
Discontinued Operation, Tax Effect of Discontinued Operation			3,598
disposal group, including discontinued operation, equity in earnings			(534)
IncomeLossFromDiscontinuedOperationsExcludingLossOnSaleNetOfTaxAttributableToReportingEntity			(251)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			(4,280)
Net loss from discontinued operations			$ (4,531)
DCO Footnote 1 [Abstract]
Interest Allocated to Discontinued Operations	$ 2,000
DCO Footnote 2 [Abstract]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		$ (8,580)
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation		4,000
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense		$ 6,000

Discontinued Operations (Detail

Discontinued Operations (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended			7 Months Ended	9 Months Ended
	Mar. 01, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2016
Proceeds from Divestiture of Businesses, Net of Cash Divested							$ 301,297
Proceeds from disposals of business/investment						$ 0	$ 301,297
Cash disposed as part of divestment								$ 7,116
Commitments and Contingencies Disclosure [Abstract]
Related Party Transaction, Purchases from Related Party		$ 4,000	$ 10,000		$ 27,000	$ 22,000
PGW [Member]
Proceeds from Divestiture of Businesses, Net of Cash Divested				$ 301,000
Proceeds from disposals of business/investment				316,000
Cash disposed as part of divestment				$ 15,000
Cash Provided by (Used in) Operating Activities, Discontinued Operations	$ (4,000)
Cash Provided by (Used in) Investing Activities, Discontinued Operations	(4,000)
Cash Provided by (Used in) Financing Activities, Discontinued Operations	15,000
Commitments and Contingencies Disclosure [Abstract]
Intercompany Sales between Continuing and Discontinued Operations	$ (8,000)
Vitro S. A. B. de C.V. [Member] | PGW [Member]
Disposal Date				Mar. 1, 2017

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands, kr in Millions	Dec. 01, 2016USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018SEK (kr)	Jun. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017SEK (kr)	Jun. 30, 2017USD ($)	Mar. 31, 2017	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Reserve for uncollectible accounts			$ 63,000							$ 63,000		$ 58,000
Inventory Disclosure [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory			386,296							$ 386,296		150,342
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Depreciation Methods										straight-line method
Depreciation			39,000			$ 34,000				$ 115,000	$ 93,000
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense			42,000			26,000				96,000	74,000
Estimated annual amortization expense in year one			40,000							40,000
Estimated annual amortization expense in year two			136,000							136,000
Estimated annual amortization expense in year three			104,000							104,000
Estimated annual amortization expense in year four			75,000							75,000
Estimated annual amortization expense in year five			62,000							62,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
Equity method investments			157,409							157,409		208,404
Investments in unconsolidated subsidiaries										11,066	7,114
Derivative Asset, Noncurrent			36,600							36,600		24,606
Equity in (losses) earnings of unconsolidated subsidiaries			20,284			(2,673)				$ 18,326	$ (3,878)
Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. federal statutory rate									35.00%	21.00%	35.00%
Adoption of ASU 2018-02 (see Note 4)										$ 5,345
ManufacturedProducts [Member]
Inventory Disclosure [Abstract]
Inventory, Raw Materials and Supplies, Gross			16,000							16,000		10,000
Inventory, Work in Process, Gross			2,000							2,000		2,000
Inventory, Finished Goods, Gross			4,000							4,000		$ 4,000
Stahlgruber [Member]
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Reserve for uncollectible accounts			3,000							3,000
Inventory Disclosure [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory			374,056							374,056
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Acquired During Period										929,000
Mekonomen [Member]
Summary of Significant Accounting Policies [Line Items]
Equity Method Investments, Fair Value Disclosure			134,000							134,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
Equity method investments			134,000							134,000
Equity Method Investment, Additional Information	December 1, 2016
Equity Method Investment, Ownership Percentage	26.50%
Investments in unconsolidated subsidiaries	$ 181,000	$ 48,000
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity			64,000							64,000
Equity in (losses) earnings of unconsolidated subsidiaries			20,000			$ (3,000)				18,000	$ (5,000)
Proceeds from Equity Method Investment, Distribution				kr 67	$ 8,000		kr 67	$ 7,000
Other than Temporary Impairment Losses, Investments			23,000
Accumulated Other Comprehensive Income (Loss)
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Adoption of ASU 2018-02 (see Note 4)										5,345
Right to acquire equity method investment [Domain] | Mekonomen [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
Derivative Asset, Noncurrent			29,000							29,000
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings		$ (8,000)	$ 2,509							$ 2,509
Amendment No. 2, Fourth Amended and Restate Credit Agreement [Member] | Revolving Credit Facility [Member]
Summary of Significant Accounting Policies [Line Items]
Weighted average interest rates			2.20%							2.20%		2.20%

Financial Statement Informati_3

Financial Statement Information Schedule of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Product Information
Inventories (3)	$ 386,296	$ 150,342
Inventories	2,794,894	2,380,783
Aftermarket and refurbished products
Product Information
Inventories	2,287,776	1,877,653
Salvage and remanufactured products
Product Information
Inventories	484,761	487,108
ManufacturedProducts [Member]
Accounting Policies [Abstract]
Inventory, Raw Materials, Gross	16,000	10,000
Inventory, Work in Process, Gross	2,000	2,000
Inventory, Finished Goods, Gross	4,000	4,000
Product Information
Inventories	$ 22,357	$ 16,022

Financial Statement Informati_4

Financial Statement Information Schedule of Estimated Useful Lives (Details)	9 Months Ended
	Sep. 30, 2018
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Furniture and Fixtures [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Furniture and Fixtures [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years

Financial Statement Informati_5

Financial Statement Information Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	$ 1,837,915		$ 1,837,915		$ 1,476,716
Less—Accumulated depreciation	(691,086)		(691,086)		(606,112)
Property, Plant and Equipment, Net	1,201,003		1,201,003		913,089
Depreciation	39,000	$ 34,000	115,000	$ 93,000
Land and improvements
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	189,404		189,404		137,790
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	373,607		373,607		233,078
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	618,209		618,209		521,526
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	142,719		142,719		133,753
Vehicles And Trailers [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	177,778		177,778		161,269
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	52,595		52,595		31,794
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	283,603		283,603		257,506
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	54,174		$ 54,174		$ 42,485
Minimum | Land and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			10 years
Minimum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			20 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			3 years
Minimum | Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			3 years
Minimum | Vehicles And Trailers [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			3 years
Minimum | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			5 years
Maximum | Land and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			20 years
Maximum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			40 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			20 years
Maximum | Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			10 years
Maximum | Vehicles And Trailers [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			10 years
Maximum | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			7 years
Stahlgruber [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	257,142		$ 257,142
Property, Plant and Equipment, Net	260,661		260,661
Stahlgruber [Member] | Land and improvements
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	47,281		47,281
Stahlgruber [Member] | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	125,649		125,649
Stahlgruber [Member] | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	49,384		49,384
Stahlgruber [Member] | Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	3,760		3,760
Stahlgruber [Member] | Vehicles And Trailers [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	643		643
Stahlgruber [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	28,535		28,535
Stahlgruber [Member] | Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	1,890		1,890
Stahlgruber [Member] | Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment excluding construction in progress, gross	$ 3,519		$ 3,519

Changes in Carrying Amount of G

Changes in Carrying Amount of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 3,536,511
Business acquisitions and adjustments to previously recorded goodwill	997,630
Exchange rate effects	(58,875)
Ending balance	4,475,266
North America
Goodwill [Roll Forward]
Beginning balance	1,709,354
Business acquisitions and adjustments to previously recorded goodwill	1,073
Exchange rate effects	(3,049)
Ending balance	1,707,378
Europe
Goodwill [Roll Forward]
Beginning balance	1,414,898
Business acquisitions and adjustments to previously recorded goodwill	1,002,277
Exchange rate effects	(55,901)
Ending balance	2,361,274
Specialty
Goodwill [Roll Forward]
Beginning balance	412,259
Business acquisitions and adjustments to previously recorded goodwill	(5,720)
Exchange rate effects	75
Ending balance	406,614
Stahlgruber [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	929,000
Goodwill [Roll Forward]
Ending balance	$ 929,376

Components of Other Intangibles

Components of Other Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets
Gross carrying amount	$ 1,267,939	$ 976,475
Accumulated amortization	(395,867)	(311,506)
Net	872,072	664,969
Other intangibles, net	$ 953,372	$ 743,769
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		16 years 6 months
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Amortization Method	Straight-line
Gross carrying amount	$ 495,839	$ 327,332
Accumulated amortization	(88,805)	(75,095)
Net	407,034	$ 252,237
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years 2 months 12 days
Customer and supplier relationships
Finite-Lived Intangible Assets
Gross carrying amount	586,221	$ 510,113
Accumulated amortization	(223,085)	(167,532)
Net	$ 363,136	342,581
Software and technology related assets [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Amortization Method	Straight-line
Gross carrying amount	$ 172,391	124,049
Accumulated amortization	(73,760)	(59,081)
Net	$ 98,631	$ 64,968
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years 1 month 6 days
Covenants not to compete
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Amortization Method	Straight-line
Gross carrying amount	$ 13,488	$ 14,981
Accumulated amortization	(10,217)	(9,798)
Net	$ 3,271	$ 5,183
Customer and supplier relationships [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Amortization Method	Accelerated
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		18 years 7 months 6 days
Maximum | Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	30 years
Maximum | Software and technology related assets [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	15 years
Maximum | Covenants not to compete
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	5 years
Maximum | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	20 years
Minimum | Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	4 years
Minimum | Software and technology related assets [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum | Covenants not to compete
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets
Finite-Lived Intangible Asset, Useful Life	3 years
Trademarks [Member]
Finite-Lived Intangible Assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 81,300	$ 78,800

Changes in Warranty Reserve (De

Changes in Warranty Reserve (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Warranty Reserve [Roll Forward]
Beginning balance	$ 23,151
Warranty expense	33,670
Warranty claims	(31,980)
Ending balance	$ 24,841

Financial Statement Informati_6

Financial Statement Information Schedule of New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Income Statement Related Disclosures [Abstract]
Receivables, Net, Current	$ 1,255,876	$ 1,065,617	$ 1,027,106
Prepaid Expense and Other Assets, Current	200,944	$ 178,987	134,479
Other assets	205,226		142,965
Other current liabilities	57,088		45,727
Deferred Income Taxes	$ (325,537)		$ (252,359)

Financial Statement Informati_7

Financial Statement Information Impact to quarterly financial statements as result of adoption of ASU 2016-09 (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017		Jan. 01, 2018	Dec. 31, 2017
Assets
Revenue		$ 3,122,378	$ 2,465,800		$ 8,873,893		$ 7,267,054
Receivables, net		1,255,876			1,255,876				$ 1,065,617	$ 1,027,106
Net Cash Provided by (Used in) Operating Activities					521,167		449,243
Net Cash Provided by (Used in) Financing Activities					979,314		(347,063)
Net income attributable to LKQ stockholders		$ 134,102	$ 122,381		$ 444,069		$ 409,573
Net income attributable to LKQ stockholders	[1]	$ 0.42	$ 0.40		$ 1.42		$ 1.33
Net income attributable to LKQ stockholders	[1]	$ 0.42	$ 0.39		$ 1.41		$ 1.32
Prepaid expenses and other current assets		$ 200,944			$ 200,944				178,987	134,479
Liabilities [Abstract]
Refund liability		106,732			106,732				83,019
Accounts payable		941,747			941,747					788,613
Other current liabilities		57,088			57,088					$ 45,727
Cost of goods sold		1,925,180	$ 1,508,924		5,460,845		$ 4,415,076
Selling, general and administrative expenses (1)		879,150	$ 695,978	[2]	2,472,085	[2]	$ 2,003,065	[2]
Adjustment Due to ASC 606 [Member]
Assets
Receivables, net									38,511
Prepaid expenses and other current assets									44,508
Liabilities [Abstract]
Refund liability									$ 83,019
Amount of adjustment to prior balance [Member]
Assets
Revenue		3,123,468			8,882,558
Receivables, net		1,205,833			1,205,833
Prepaid expenses and other current assets		144,255			144,255
Liabilities [Abstract]
Cost of goods sold		1,925,107			5,467,061
Selling, general and administrative expenses (1)		880,313			2,474,534
Adjustment Due to ASC 606 [Member]
Assets
Revenue		(1,090)			(8,665)
Receivables, net		50,043			50,043
Prepaid expenses and other current assets		56,689			56,689
Liabilities [Abstract]
Refund liability		106,732			106,732
Cost of goods sold		73			(6,216)
Selling, general and administrative expenses (1)		$ (1,163)			$ (2,449)
[1]	(2) The sum of the individual earnings per share amounts may not equal the total due to rounding.
[2]	(1) Selling, general and administrative expenses contain facility and warehouses expenses and distribution expenses that were previously shown separately.

Financial Statement Informati_8

Financial Statement Information Equity Method Investments (Details)	Dec. 01, 2016
Mekonomen [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Additional Information	December 1, 2016

Financial Statement Informati_9

Financial Statement Information Finite-Lived Intangible Assets Acquired as Part of Business Combination (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Stahlgruber [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 285,529,000
Stahlgruber [Member] | Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	173,946,000
Stahlgruber [Member] | Customer and supplier relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	78,239,000
Stahlgruber [Member] | Software and technology related assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	33,344,000
All 2018 Acquisitions excluding Stahlgruber [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	11,181,000
All 2018 Acquisitions excluding Stahlgruber [Member] | Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	2,895,000
All 2018 Acquisitions excluding Stahlgruber [Member] | Customer and supplier relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	8,194,000
All 2018 Acquisitions excluding Stahlgruber [Member] | Software and technology related assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	92,000
All 2018 Acquisitions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	296,710,000
All 2018 Acquisitions [Member] | Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	176,841,000
All 2018 Acquisitions [Member] | Customer and supplier relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	86,433,000
All 2018 Acquisitions [Member] | Software and technology related assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 33,436,000

Financial Statement Informat_10

Financial Statement Information Finite-Lived Intangible Assets Acquired As Part Of Business Combination, Remaining Useful Life (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		16 years 6 months
Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years 2 months 12 days
Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		18 years 7 months 6 days
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years 1 month 6 days
Covenants not to compete [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		4 years 4 months 24 days
All 2018 Acquisitions excluding Stahlgruber [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years 2 months 12 days
All 2018 Acquisitions excluding Stahlgruber [Member] | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
All 2018 Acquisitions excluding Stahlgruber [Member] | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years 7 months 6 days
All 2018 Acquisitions excluding Stahlgruber [Member] | Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
Stahlgruber [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years 8 months 12 days
Stahlgruber [Member] | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	19 years 10 months 24 days
Stahlgruber [Member] | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Stahlgruber [Member] | Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 9 months 18 days
All 2018 Acquisitions [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years 8 months 12 days
All 2018 Acquisitions [Member] | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	19 years 10 months 24 days
All 2018 Acquisitions [Member] | Customer and supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 7 months 6 days
All 2018 Acquisitions [Member] | Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 9 months 18 days

Revenue Recognition Disaggreg_2

Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenue Recognition [Line Items]
Revenue	$ 3,122,378	$ 2,465,800	$ 8,873,893	$ 7,267,054
Contract with Customer, Refund Liability	107,000		107,000
Contract with Customer, Right to Recover Product	57,000		57,000
Contract With Customer, Right Of Return, Net					$ 38,000
Revenue, Variable Consideration Reserve	114,000		114,000		$ 78,000
North America
Revenue Recognition [Line Items]
Revenue	1,262,799	1,181,943	3,927,808	3,596,697
Europe
Revenue Recognition [Line Items]
Revenue	1,470,856	954,522	3,795,439	2,665,170
Specialty
Revenue Recognition [Line Items]
Revenue	390,061	330,594	1,154,726	1,008,998
Parts and Services
Revenue Recognition [Line Items]
Revenue	2,961,981	2,333,757	8,379,337	6,872,581
Parts and Services | North America
Revenue Recognition [Line Items]
Revenue	1,109,067	1,051,470	3,447,074	3,207,001
Parts and Services | Europe
Revenue Recognition [Line Items]
Revenue	1,464,049	952,765	3,781,091	2,659,804
Parts and Services | Specialty
Revenue Recognition [Line Items]
Revenue	388,865	329,522	1,151,172	1,005,776
Other Revenue
Revenue Recognition [Line Items]
Revenue	$ 160,397	$ 132,043	$ 494,556	$ 394,473

Revenue Recognition Movement in

Revenue Recognition Movement in Standard Prodcut Warranty Accrual (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Product Warranty Liability [Line Items]
Deferred Service-Type Warranty Revenue	$ 23,154	$ 19,465
Deferred Revenue, Additions	28,889
Deferred Revenue, Revenue Recognized	$ (25,200)
Minimum
Product Warranty Liability [Line Items]
Standard Product Warranty Period	6 months
Maximum
Product Warranty Liability [Line Items]
Standard Product Warranty Period	36 months

Restructuring and Acquisition_2

Restructuring and Acquisition Related Expenses - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Acquisition Related Expenses [Abstract]
Business Combination, Acquisition Related Costs	$ 1	$ 3	$ 17	$ 8
Acquisition And Restructuring Integration Plans [Abstract]
Restructuring Costs	5	$ 2	10
Specialty
Acquisition And Restructuring Integration Plans [Abstract]
Restructuring Costs	1		2
Stahlgruber [Member]
Acquisition Related Expenses [Abstract]
Business Combination, Acquisition Related Costs	1		15
Andrew Page
Acquisition And Restructuring Integration Plans [Abstract]
Restructuring Costs	4		8
Maximum
Acquisition And Restructuring Integration Plans [Abstract]
Expected future restructuring expenses	$ (10)		$ (10)

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)shares
RSUs
RSUs [Abstract]
Fair value of RSUs vested during the period | $	$ 27
Performance Shares [Member]
RSUs [Abstract]
Reporting period of positive diluted earnings per share	5 years
Stock options
Stock Options [Abstract]
Options granted during the period	0
Options vested during the period	0
Minimum | Stock options
Stock Options [Abstract]
Stock options expiration period	6 years
Maximum | RSUs
Stock Options [Abstract]
Vesting period	5 years
Maximum | Stock options
Stock Options [Abstract]
Stock options expiration period	10 years
Vesting period	5 years

Equity Incentive Plans Schedule

Equity Incentive Plans Schedule of Unvested Restricted Stock Units Activity (Details) - RSUs - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Shares Outstanding [Abstract]
Unvested RSUs, shares	1,493,522	1,624,390
RSUs granted, shares	601,802
RSUs vested, shares	(698,903)
RSUs forfeited/canceled, shares	(33,767)
RSUs expected to vest	1,344,519
lkq_expected_to_vest_other_than_options_weighted_average_per_share	$ 34.88
Weighted Average Fair Value [Abstract]
Unvested RSUs, weighted average grant date fair value	34.89	$ 29.94
RSUs granted, weighted average grant date fair value	42.58
RSUs vested, weighted average grant date fair value	30.07
RSUs forfeited/canceled, weighted average grant date fair value	$ 33.28
RSUs expected to vest, weighted average remaining contractual term	2 years 7 months 6 days
RSUs expected to vest, aggregate intrinsic value	$ 42,581

Equity Incentive Plans Schedu_2

Equity Incentive Plans Schedule of Stock Option Activity (Details) - Stock options - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Shares Outstanding [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,296,069	1,738,073
Stock options exercised, shares	(441,495)
Stock options forfeited/canceled, shares	(509)
Exercisable and expected to vest stock options, shares	1,296,069
Weighted Average Fair Value [Abstract]
Stock options outstanding, weighted average exercise price	$ 9.42	$ 9.20
Stock options exercised, weighted average exercise price	8.54
Stock options forfeited/canceled, weighted average exercise price	32.31
Exercisable and expected to vest stock options, weighted average exercise price	$ 9.42
Weighted Average Contractual Term [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	1 year
Exercisable and expected to vest stock options, weighted average remaining contractual term (years)	1 year
Aggregate Intrinsic Value [Abstract]
Stock options exercised, aggregate intrinsic value	$ 12,678
Stock options outstanding, aggregate intrinsic value	28,862
Exercisable and expected to vest stock options, aggregate intrinsic value	$ 28,862

Schedule of Stock-Based Compens

Schedule of Stock-Based Compensation Expense Expected to be Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense			$ 17,544	$ 17,582
RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense	$ 5,700	$ 5,158	17,544	$ 17,582
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 40,000		$ 40,000

Earnings Per Share Earnings P_2

Earnings Per Share Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Income from continuing operations	$ 134,480	$ 122,381	$ 445,109	$ 414,104
Denominator for basic earnings per share—Weighted-average shares outstanding	318,082	308,909	313,417	308,451
Effect of dilutive securities:
Denominator for diluted earnings per share—Adjusted weighted-average shares outstanding	319,402	310,779	314,951	310,495
Basic earnings per share from continuing operations	$ 0.42	$ 0.40	$ 1.42	$ 1.34
Diluted earnings per share from continuing operations	$ 0.42	$ 0.39	$ 1.41	$ 1.33
RSUs
Effect of dilutive securities:
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	333	485	452	501
Stock options
Effect of dilutive securities:
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	987	1,385	1,082	1,543

Schedule of Antidilutive Securi

Schedule of Antidilutive Securities Excluded from Computation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities	375	317	50
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities			51

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ 134,791	$ 97,612	$ 134,791	$ 97,612	$ 116,061	$ 70,476	$ 154,270	$ 267,175
Pretax income (loss)	(14,507)	48,367	(48,338)	132,797
Income tax effect	(699)	(1,532)	3,544	(12,269)
Reclassification of unrealized loss (gain)	(7,263)	12,391	(26,020)	44,630
Reclassification of deferred income taxes	(1,698)	4,598	(6,082)	16,573
Other comprehensive income from unconsolidated subsidiaries	643	(1,034)	2,160	(1,635)
Disposal of business, net				(1,925)
Adoption of ASU 2018-02 (see Note 4)			5,345
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	146,704	97,735	146,704	97,735	125,753	71,933	157,353	272,529
Pretax income (loss)	(23,405)	63,769	(82,137)	177,434
Income tax effect	(2,454)	4,151	(4,507)	4,151
Reclassification of unrealized loss (gain)	0
Reclassification of deferred income taxes	0
Other comprehensive income from unconsolidated subsidiaries	0
Disposal of business, net				1,511
Adoption of ASU 2018-02 (see Note 4)			2,859
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(19,988)	(8,548)	(19,988)	(8,548)	(19,684)	(11,538)	(10,324)	(8,091)
Pretax income (loss)	7,681	(15,402)	33,901	(44,749)
Income tax effect	1,796	(5,683)	7,926	(16,463)
Reclassification of unrealized loss (gain)	(7,284)	12,591	(26,117)	45,551
Reclassification of deferred income taxes	(1,703)	4,648	(6,106)	16,808
Other comprehensive income from unconsolidated subsidiaries	0
Adoption of ASU 2018-02 (see Note 4)			2,486
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		6,790		6,790
Reclassification of unrealized loss (gain)		(200)
Reclassification of deferred income taxes		50
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	8,926	6,790	8,926	6,790	(10,200)	(8,772)	(6,640)	$ (2,737)
Pretax income (loss)	1,217		(102)	112
Income tax effect	(41)		125	43
Reclassification of unrealized loss (gain)	21		97	(921)
Reclassification of deferred income taxes	5		24	(235)
Other comprehensive income from unconsolidated subsidiaries	0
Disposal of business, net				(3,436)
Accumulated Gain (Loss) from Unconsoldated Subsidiaries [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(851)	1,635	(851)	1,635	$ (208)	$ 1,309	$ 601
Pretax income (loss)	0
Income tax effect	0
Reclassification of unrealized loss (gain)	0
Reclassification of deferred income taxes	0
Other comprehensive income from unconsolidated subsidiaries	643	(1,034)	2,160	(1,635)
Cross Currency Fx Forward Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ 2,000	$ 2,000	$ 6,000	$ 6,000

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Adoption of ASU 2018-02 (see Note 4)			$ 5,345
Interest Rate Swap
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ 2,000		5,000	$ 1,000
Cross Currency Fx Forward Contract [Member]
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	2,000	$ 2,000	6,000	6,000
Cross Currency Interest Rate Contract [Member]
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ 3,000	$ (15,000)	15,000	$ (50,000)
Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items]
Adoption of ASU 2018-02 (see Note 4)			$ 5,345

Long-Term Obligations - Additio

Long-Term Obligations - Additional Information (Details) $ in Thousands, € in Millions	3 Months Ended	9 Months Ended	12 Months Ended	13 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Jan. 29, 2023USD ($)	Apr. 09, 2018EUR (€)	Dec. 01, 2017USD ($)	Nov. 29, 2016USD ($)	Apr. 14, 2016	Jan. 29, 2016USD ($)	May 09, 2013USD ($)
US Notes (2023) [Member]
Debt Instrument
Long-term Debt	$ 600,000	$ 600,000	$ 600,000
Senior notes interest rate										4.75%
Euro Notes (2024)
Debt Instrument
Long-term Debt	580,200	580,200	600,150
Senior notes interest rate								3.875%
Euro Notes 2026/28 [Member]
Debt Instrument
Payments of Financing Costs		16,000
Long-term Debt	1,160,400	1,160,400			€ 1,000
Receivables securitization
Debt Instrument
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	100,000	100,000	100,000
Revolving Credit Facility [Member]
Debt Instrument
Long-term Line of Credit	$ 1,800,000	$ 1,800,000	2,000,000
Amendment No. 2, Fourth Amended and Restate Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity						$ 2,750,000
Line of Credit Facility, Increase (Decrease), Net			$ 300,000
Line of Credit Facility, Frequency of Payments		quarterly installments
Line of Credit Facility, Periodic Payment				$ 9,000
Increment change in applicable margin						0.25%
Weighted average interest rates	2.20%	2.20%	2.20%
Long-Term Line of Credit, Current			$ 18,000
Outstanding letters of credit	$ 65,000	$ 65,000
Availability on the revolving credit facility	$ 1,500,000	$ 1,500,000
Payments of Financing Costs			5,000
Amendment No. 2, Fourth Amended and Restate Credit Agreement [Member] | Letter of Credit [Member]
Debt Instrument
Line of Credit Facility, Commitment Fee Percentage	0.125%
Fourth Amended Credit Agreement | Revolving Credit Facility [Member]
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity									$ 2,450,000
Mitsubishi UFJ [Member] | Receivables securitization
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity							$ 100,000
Weighted average interest rates	3.10%	3.10%
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	$ 100,000	$ 100,000	100,000
Twenty Twenty Three [Domain] | US Notes (2023) [Member]
Debt Instrument
Long-term Debt										$ 600,000
TwentyTwentySix [Member] | Euro Notes 2026/28 [Member]
Debt Instrument
Long-term Debt | €					€ 750
Senior notes interest rate					3.625%
TwentyTwentyEight [Member] | Euro Notes 2026/28 [Member]
Debt Instrument
Long-term Debt | €					€ 250
Senior notes interest rate					4.125%
Net Receivables [Member] | Mitsubishi UFJ [Member] | Receivables securitization
Debt Instrument
Debt Instrument, Collateral Amount	$ 127,000	$ 127,000	$ 144,000
Minimum increment [Member] | Amendment No. 2, Fourth Amended and Restate Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument
Increment change in commitment fees	0.025%	0.025%
Maximum increment [Member] | Amendment No. 2, Fourth Amended and Restate Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument
Increment change in commitment fees	0.05%	0.05%

Schedule of Long-Term Obligatio

Schedule of Long-Term Obligations (Details) $ in Thousands, € in Millions	Sep. 30, 2018USD ($)	Apr. 09, 2018EUR (€)	Dec. 31, 2017USD ($)	Apr. 14, 2016EUR (€)
Debt Instrument
Long-term obligations, total	$ 4,404,369		$ 3,428,280
Deferred Finance Costs, Noncurrent, Net	(31,251)		(21,476)
Deferred Finance Costs, Current, Net	(4,616)		(2,824)
Long-term obligations, total, net	4,368,502		3,403,980
Current portion of long-term obligations	(118,365)		(126,360)
Long-term obligations, excluding current portion	4,250,137		3,277,620
Loans Payable
Debt Instrument
Term loan	590,000		704,800
Revolving Credit Facility [Member]
Debt Instrument
Long-term Line of Credit	1,183,626		1,283,551
US Notes (2023) [Member]
Debt Instrument
Long-term Debt	600,000		600,000
Euro Notes (2024)
Debt Instrument
Long-term Debt	580,200		600,150
Euro Notes 2026/28 [Member]
Debt Instrument
Long-term Debt	1,160,400	€ 1,000
Receivables securitization
Debt Instrument
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	100,000		100,000
Notes payable
Debt Instrument
Notes Payable	38,641		29,146
Other Long Term Debt
Debt Instrument
Other long-term debt	151,502		110,633
Revolving Credit Facility [Member]
Debt Instrument
Long-term Line of Credit	$ 1,800,000		$ 2,000,000
Twenty Twenty Four [Domain] | Euro Notes (2024)
Debt Instrument
Long-term Debt | €				€ 500
TwentyTwentySix [Member] | Euro Notes 2026/28 [Member]
Debt Instrument
Long-term Debt | €		750
TwentyTwentyEight [Member] | Euro Notes 2026/28 [Member]
Debt Instrument
Long-term Debt | €		€ 250

Schedule of Long-Term Obligat_2

Schedule of Long-Term Obligations (Parenthetical) (Details)	Jun. 30, 2018	Dec. 31, 2017
Notes payable
Debt Instrument
Weighted average interest rates	1.50%	1.40%
Other Long Term Debt
Debt Instrument
Weighted average interest rates	2.20%	1.70%

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Details) $ in Thousands, € in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018EUR (€)	Sep. 30, 2018EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2016EUR (€)
Effect of Netting Derivative Instruments		$ (19,000)	$ (19,000)			$ (12,000)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		4,000	4,000
Settlement of Notional Amounts | €					€ (15)
Derivative Asset, Noncurrent		36,600	36,600			24,606
Derivative Liability, Noncurrent		49,212	49,212			61,492
Interest Rate Swap [Member]
Derivative, Notional Amount		590,000	590,000			590,000
Derivative Asset, Noncurrent		25,719	25,719			19,102
Cross Currency Interest Rate Contract [Member]
Derivative, Notional Amount		394,649	394,649			406,546	$ 422,000	€ 400
Derivative Asset, Noncurrent		10,881	10,881			5,504
Derivative Liability, Noncurrent		49,212	49,212			$ 61,492
Right to acquire equity method investment [Domain] | Mekonomen [Member]
Derivative Asset, Noncurrent		29,000	29,000
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	$ 8,000	$ (2,509)	$ (2,509)
2018 Cross Currency Swaps [Member] | Cross Currency Interest Rate Contract [Member]
Derivative, Notional Amount	$ 184,000			€ 160

Fair Value Disclosures (Details

Fair Value Disclosures (Details) $ in Thousands, € in Billions	Sep. 30, 2018USD ($)	Apr. 09, 2018EUR (€)	Dec. 31, 2017USD ($)
Fair Value, Measurements, Recurring [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 118,974		$ 70,590
Financial and Nonfinancial Liabilities, Fair Value Disclosure	108,874		111,327
Fair Value, Measurements, Recurring [Member] | Cash Surrender Value [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	53,691		45,984
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	25,719		19,102
Fair Value, Measurements, Recurring [Member] | Cross Currency Interest Rate Contract [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	10,881		5,504
Financial and Nonfinancial Liabilities, Fair Value Disclosure	49,212		61,492
Fair Value, Measurements, Recurring [Member] | Contingent Consideration Liabilities [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	5,243		2,636
Fair Value, Measurements, Recurring [Member] | Deferred Compensation Liabilities [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	54,419		47,199
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	118,974		70,590
Financial and Nonfinancial Liabilities, Fair Value Disclosure	103,631		108,691
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Surrender Value [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	53,691		45,984
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	25,719		19,102
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Cross Currency Interest Rate Contract [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	10,881		5,504
Financial and Nonfinancial Liabilities, Fair Value Disclosure	49,212		61,492
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Deferred Compensation Liabilities [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	54,419		47,199
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	5,243		2,636
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Contingent Consideration Liabilities [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	5,243		2,636
Revolving Credit Facility [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term Line of Credit	1,800,000		2,000,000
Euro Notes 2026/28 [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term Debt	1,160,400	€ 1
Euro Notes (2024)
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term Debt, Fair Value	615,000		658,000
Long-term Debt	580,200		600,150
Receivables securitization
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	100,000		100,000
US Notes (2023) [Member]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term Debt, Fair Value	601,000		615,000
Long-term Debt	600,000		$ 600,000
Mekonomen [Member] | Fair Value, Measurements, Recurring [Member] | Right to acquire equity method investment [Domain]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	28,683
Mekonomen [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Right to acquire equity method investment [Domain]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 28,683

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	1.00%
Effective Income Tax Rate Reconciliation, Change in the Discrete Items, Amount	$ 12	$ 8
Tax Cuts and Jobs Act of 2017 Transition Tax Adjustment for Accumulated Foreign Earnings Provisional Amount	10
Excess Tax Benefit on Stock Based Payments	$ 4	$ 7
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional amount			$ 51
Effective Income Tax Rate Reconciliation, Change as a result of the Discrete Items, Percent	0.60%

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan		$ 111,000		$ 111,000
Liability, Defined Benefit Plan, Noncurrent						$ 46,000
Service Cost		628	$ 1,126	1,612	$ 2,902
Interest Cost		996	750	2,442	2,091
Expected Return on Plan Assets		(720)	(507)	(2,220)	(1,059)
Amortization of Prior Service Credit			(71)		(201)
Amortization of Actuarial (Gain) Loss		21	(129)	97	(720)
Net Periodic Benefit Expense		925	$ 1,169	1,931	$ 3,013
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 1,000			12,000
Stahlgruber [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan		$ 75,000		$ 75,000

Future Minimum Lease Commitment

Future Minimum Lease Commitments (Details) $ in Thousands	Sep. 30, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	$ 72,780
Operating Leases, Future Minimum Payments Due, Next Twelve Months	271,642
Operating Leases, Future Minimum Payments, Due in Two Years	226,936
Operating Leases, Future Minimum Payments, Due in Three Years	179,921
Operating Leases, Future Minimum Payments, Due in Four Years	144,700
Operating Leases, Future Minimum Payments, Due in Five Years	122,149
Thereafter	689,583
Future Minimum Lease Payments	$ 1,707,711

Segment and Geographic Inform_3

Segment and Geographic Information - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)
Segment Reporting Information
Revenue	$ 3,122,378	$ 2,465,800	$ 8,873,893	$ 7,267,054
Segment EBITDA	326,344	267,035	963,531	863,164
Depreciation and amortization	$ 81,473	59,902	210,977	166,508
Number of operating segments	4
Number of reportable segments	3
Third Party [Member]
Segment Reporting Information
Revenue	$ 3,122,378	2,465,800	8,873,893	7,267,054
North America
Segment Reporting Information
Revenue	1,262,799	1,181,943	3,927,808	3,596,697
Segment EBITDA	154,049	152,627	506,772	502,494
Depreciation and amortization	$ 22,151	22,104	64,985	64,305
Number of reportable segments	1
North America | Intersegment [Member]
Segment Reporting Information
Revenue	$ 142	187	526	589
North America | Third Party [Member]
Segment Reporting Information
Revenue	1,262,657	1,181,756	3,927,282	3,596,108
Europe
Segment Reporting Information
Revenue	1,470,856	954,522	3,795,439	2,665,170
Segment EBITDA	129,358	79,294	315,785	241,537
Depreciation and amortization	52,139	32,326	124,697	85,809
Europe | Third Party [Member]
Segment Reporting Information
Revenue	1,470,856	954,522	3,795,439	2,665,170
Specialty
Segment Reporting Information
Revenue	390,061	330,594	1,154,726	1,008,998
Segment EBITDA	42,937	35,114	140,974	119,133
Depreciation and amortization	7,183	5,472	21,295	16,394
Specialty | Intersegment [Member]
Segment Reporting Information
Revenue	1,196	1,072	3,554	3,222
Specialty | Third Party [Member]
Segment Reporting Information
Revenue	388,865	329,522	1,151,172	1,005,776
Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	(1,338)	(1,259)	(4,080)	(3,811)
Intersegment Eliminations [Member] | Intersegment [Member]
Segment Reporting Information
Revenue	$ (1,338)	$ (1,259)	$ (4,080)	$ (3,811)

Schedule of Financial Performan

Schedule of Financial Performance by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information
Revenue	$ 3,122,378	$ 2,465,800	$ 8,873,893	$ 7,267,054
Segment EBITDA	326,344	267,035	963,531	863,164
Depreciation and amortization	81,473	59,902	210,977	166,508
North America
Segment Reporting Information
Revenue	1,262,799	1,181,943	3,927,808	3,596,697
Segment EBITDA	154,049	152,627	506,772	502,494
Depreciation and amortization	22,151	22,104	64,985	64,305
Europe
Segment Reporting Information
Revenue	1,470,856	954,522	3,795,439	2,665,170
Segment EBITDA	129,358	79,294	315,785	241,537
Depreciation and amortization	52,139	32,326	124,697	85,809
Specialty
Segment Reporting Information
Revenue	390,061	330,594	1,154,726	1,008,998
Segment EBITDA	42,937	35,114	140,974	119,133
Depreciation and amortization	7,183	5,472	21,295	16,394
Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	(1,338)	(1,259)	(4,080)	(3,811)
Third Party [Member]
Segment Reporting Information
Revenue	3,122,378	2,465,800	8,873,893	7,267,054
Third Party [Member] | North America
Segment Reporting Information
Revenue	1,262,657	1,181,756	3,927,282	3,596,108
Third Party [Member] | Europe
Segment Reporting Information
Revenue	1,470,856	954,522	3,795,439	2,665,170
Third Party [Member] | Specialty
Segment Reporting Information
Revenue	388,865	329,522	1,151,172	1,005,776
Intersegment [Member] | North America
Segment Reporting Information
Revenue	142	187	526	589
Intersegment [Member] | Specialty
Segment Reporting Information
Revenue	1,196	1,072	3,554	3,222
Intersegment [Member] | Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	$ (1,338)	$ (1,259)	$ (4,080)	$ (3,811)

Reconciliation Of Segment EBITD

Reconciliation Of Segment EBITDA To Net Income (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Reconciliation of Segment Earnings Before Interest Taxes Depreciation And Amortization to Net Income Table [Line Items]
Interest expense, net		$ 40,860	$ 25,222	$ 107,647	$ 73,806
Net income		134,480	122,381	445,109	409,573
Less: net income attributable to noncontrolling interest		378		1,040
Noncontrolling interest		56,956		56,956		$ 8,484
Net income attributable to LKQ stockholders		134,102	122,381	444,069	409,573
Net loss from discontinued operations					(4,531)
Net income from continuing operations attributable to LKQ stockholders		134,102	122,381	444,069	414,104
Depreciation and amortization		76,701	56,877	196,322	159,178
Depreciation and amortization - cost of goods sold		4,772	3,025	14,655	7,330
Provision for income taxes		46,068	58,189	156,427	206,206
EBITDA		302,503	265,694	919,120	860,624
Equity in (losses) earnings of unconsolidated subsidiaries		(20,284)	2,673	(18,326)	3,878
Gains on bargain purchases			913	328	3,990	$ (3,870)
Restructuring and acquisition related expenses		6,614	4,922	26,546	10,371
Inventory step-up adjustment - acquisition related				403
Impairment of net assets held for sale				2,438
Change in fair value of contingent consideration liabilities		548	(5)	465	(37)
Segment EBITDA		326,344	$ 267,035	963,531	$ 863,164
Right to acquire equity method investment [Domain] | Mekonomen [Member]
Reconciliation of Segment Earnings Before Interest Taxes Depreciation And Amortization to Net Income Table [Line Items]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	$ (8,000)	$ 2,509		$ 2,509

Schedule of Capital Expenditure

Schedule of Capital Expenditures by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information
Capital Expenditures	$ 56,342	$ 43,992	$ 171,763	$ 135,537
North America
Segment Reporting Information
Capital Expenditures	27,996	31,021	86,864	69,934
Europe
Segment Reporting Information
Capital Expenditures	23,904	12,119	69,582	55,253
Specialty
Segment Reporting Information
Capital Expenditures	$ 4,442	$ 852	$ 15,317	6,752
Discontinued Operations [Member]
Segment Reporting Information
Capital Expenditures				$ 3,598

Schedule of Assets by Reportabl

Schedule of Assets by Reportable Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Segment Reporting Information
Receivables, net	$ 1,255,876	$ 1,065,617	$ 1,027,106
Inventories	2,794,894		2,380,783
Property, plant and equipment, net	1,201,003		913,089
Equity method investments	157,409		208,404
Other unallocated assets	6,176,154		4,837,490
Total assets	11,585,336		9,366,872
North America
Segment Reporting Information
Receivables, net	437,429		379,666
Inventories	1,058,310		1,076,393
Property, plant and equipment, net	560,918		537,286
Equity method investments	16,075		336
Europe
Segment Reporting Information
Receivables, net	696,106		555,372
Inventories	1,391,578		964,068
Property, plant and equipment, net	554,550		293,539
Equity method investments	141,334		208,068
Specialty
Segment Reporting Information
Receivables, net	122,341		92,068
Inventories	345,006		340,322
Property, plant and equipment, net	$ 85,535		$ 82,264

Segment and Geographic Inform_4

Segment and Geographic Information Schedule of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets
Revenue	$ 3,122,378	$ 2,465,800	$ 8,873,893	$ 7,267,054
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Revenue	1,535,557	1,395,495	4,716,927	4,268,600
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Revenue	408,474	399,155	1,294,155	1,171,829
GERMANY
Revenues from External Customers and Long-Lived Assets
Revenue	415,748	549	564,698	862
Other countries
Revenues from External Customers and Long-Lived Assets
Revenue	$ 762,599	$ 670,601	$ 2,298,113	$ 1,825,763

Schedule of Tangible Long-Lived

Schedule of Tangible Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets
Long-lived Assets	$ 1,201,003	$ 913,089
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Long-lived Assets	609,562	583,236
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Long-lived Assets	170,940	178,021
Other countries
Revenues from External Customers and Long-Lived Assets
Long-lived Assets	210,157	151,791
GERMANY
Revenues from External Customers and Long-Lived Assets
Long-lived Assets	$ 210,344	$ 41

Subsequent Events (Details)

Subsequent Events (Details) $ in Millions	Dec. 31, 2018USD ($)
Subsequent Events [Abstract]
Stock Repurchase Program, Authorized Amount	$ 500

Condensed Consolidating Stateme

Condensed Consolidating Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended				12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017		Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 3,122,378	$ 2,465,800		$ 8,873,893		$ 7,267,054
Cost of goods sold	1,925,180	1,508,924		5,460,845		4,415,076
Gross margin	1,197,198	956,876		3,413,048		2,851,978
Selling, general and administrative expenses (1)	879,150	695,978	[1]	2,472,085	[1]	2,003,065	[1]
Restructuring and acquisition related expenses	6,614	4,922		26,546		10,371
Depreciation and amortization	76,701	56,877		196,322		159,178
Operating Income (Loss)	234,733	199,099		718,095		679,364
Other expense (income):
Interest expense, net	40,860	25,222		107,647		73,806
Gains on bargain purchases		(913)		(328)		(3,990)		$ 3,870
Other (income) expense, net	(6,959)	(3,107)		(9,086)		(6,884)
Total other expense, net	33,901	21,202		98,233		62,932
(Loss) income before (benefit) provision for income taxes	200,832	177,897		619,862		616,432
Provision for income taxes	46,068	58,189		156,427		206,206
Equity in (losses) earnings of unconsolidated subsidiaries	(20,284)	2,673		(18,326)		3,878
Income from continuing operations	134,480	122,381		445,109		414,104
Net loss from discontinued operations						(4,531)
Less: net income attributable to noncontrolling interest	378			1,040
Net income attributable to LKQ stockholders	134,102	122,381		444,069		409,573
Parent
Condensed Financial Statements, Captions [Line Items]
Gross margin		0		0
Selling, general and administrative expenses (1)	6,725	7,861		25,538		26,209
Depreciation and amortization	34	29		84		89
Operating Income (Loss)	(6,759)	(7,890)		(25,622)		(26,298)
Other expense (income):
Interest expense, net	16,191	16,232		52,004		48,904
Intercompany interest (income) expense, net	(15,121)	(2,389)		(45,927)		(10,221)
Other (income) expense, net	(178)	32		(1,076)		286
Total other expense, net	(892)	(13,875)		(5,001)		(38,969)
(Loss) income before (benefit) provision for income taxes	(7,651)	(21,765)		(30,623)		(65,267)
Provision for income taxes	(12,008)	(8,436)		(19,656)		(27,034)
Equity in earnings of subsidiaries	129,745	135,710		455,036		452,337
Income from continuing operations	134,102					414,104
Net loss from discontinued operations						(4,531)
Net income attributable to LKQ stockholders	134,102	122,381		444,069		409,573
Guarantors
Condensed Financial Statements, Captions [Line Items]
Revenue	1,550,301	1,433,742		4,768,292		4,374,693
Cost of goods sold	934,913	861,078		2,869,499		2,613,540
Gross margin	615,388	572,664		1,898,793		1,761,153
Selling, general and administrative expenses (1)	434,965	394,926		1,292,455		1,165,897
Restructuring and acquisition related expenses	1,638	1,473		1,968		4,010
Depreciation and amortization	25,238	25,005		74,102		73,072
Operating Income (Loss)	153,547	151,260		530,268		518,174
Other expense (income):
Interest expense, net	(193)	57		(94)		281
Intercompany interest (income) expense, net	10,014	(2,814)		29,559		(4,530)
Other (income) expense, net	(3,514)	(4,011)		(13,793)		(8,247)
Total other expense, net	(6,307)	6,768		(15,672)		12,496
(Loss) income before (benefit) provision for income taxes	147,240	158,028		514,596		530,670
Provision for income taxes	41,875	56,920		141,295		200,321
Equity in (losses) earnings of unconsolidated subsidiaries	(156)			(156)
Equity in earnings of subsidiaries	4,467	6,674		14,028		17,282
Income from continuing operations	109,676					347,631
Net loss from discontinued operations						(4,531)
Net income attributable to LKQ stockholders	109,676	107,782		387,173		343,100
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Revenue	1,609,525	1,069,682		4,216,417		3,001,386
Cost of goods sold	1,027,715	685,470		2,702,162		1,910,561
Gross margin	581,810	384,212		1,514,255		1,090,825
Selling, general and administrative expenses (1)	437,460	293,191		1,154,092		810,959
Restructuring and acquisition related expenses	4,976	3,449		24,578		6,361
Depreciation and amortization	51,429	31,843		122,136		86,017
Operating Income (Loss)	87,945	55,729		213,449		187,488
Other expense (income):
Interest expense, net	24,862	8,933		55,737		24,621
Intercompany interest (income) expense, net	5,107	5,203		16,368		14,751
Gains on bargain purchases		(913)		(328)		(3,990)
Other (income) expense, net	(3,267)	872		5,783		1,077
Total other expense, net	(26,702)	(14,095)		(77,560)		(36,459)
(Loss) income before (benefit) provision for income taxes	61,243	41,634		135,889		151,029
Provision for income taxes	16,201	9,705		34,788		32,919
Equity in (losses) earnings of unconsolidated subsidiaries	(20,128)	2,673		(18,170)		3,878
Income from continuing operations	24,914					121,988
Net loss from discontinued operations						2,050
Less: net income attributable to noncontrolling interest	378			1,040
Net income attributable to LKQ stockholders	24,536	34,602		81,891		124,038
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue	(37,448)	(37,624)		(110,816)		(109,025)
Cost of goods sold	(37,448)	(37,624)		(110,816)		(109,025)
Other expense (income):
Equity in earnings of subsidiaries	(134,212)	(142,384)		(469,064)		(469,619)
Income from continuing operations	(134,212)					(469,619)
Net loss from discontinued operations						2,481
Net income attributable to LKQ stockholders	$ (134,212)	$ (142,384)		$ (469,064)		$ (467,138)
[1]	(1) Selling, general and administrative expenses contain facility and warehouses expenses and distribution expenses that were previously shown separately.

Condensed Consolidating State_2

Condensed Consolidating Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Net income	$ 134,480	$ 122,381	$ 445,109	$ 409,573
Less: net income attributable to noncontrolling interest	378		1,040
Net income attributable to LKQ stockholders	134,102	122,381	444,069	409,573
Other comprehensive income (loss):
Foreign currency translation, net of tax	(20,951)	59,618	(77,630)	174,794
Net change in unrealized gains/losses on cash flow hedges, net of tax	304	(1,776)	5,964	457
Net change in unrealized gains/losses on pension plans, net of tax	1,274	150	(154)	(4,053)
Net change in other comprehensive loss from unconsolidated subsidiaries	643	(1,034)	2,160	(1,635)
Other comprehensive (loss) income	(18,730)	56,658	(69,660)	169,563
Comprehensive income	115,750	179,039	375,449	579,136
Less: comprehensive income attributable to noncontrolling interest	378		1,040
Comprehensive income (loss) attributable to LKQ stockholders	115,372	179,039	374,409	579,136
Parent
Condensed Financial Statements, Captions [Line Items]
Net income	134,102		444,069
Net income attributable to LKQ stockholders	134,102	122,381	444,069	409,573
Other comprehensive income (loss):
Foreign currency translation, net of tax	(20,951)	59,618	(77,630)	174,794
Net change in unrealized gains/losses on cash flow hedges, net of tax	304	(1,776)	5,964	457
Net change in unrealized gains/losses on pension plans, net of tax	(1,274)	150	(154)	(4,053)
Net change in other comprehensive loss from unconsolidated subsidiaries	643	(1,034)	2,160	(1,635)
Other comprehensive (loss) income	(18,730)	56,658	(69,660)	169,563
Comprehensive income	115,372		374,409
Comprehensive income (loss) attributable to LKQ stockholders	115,372	179,039	374,409	579,136
Guarantors
Condensed Financial Statements, Captions [Line Items]
Net income	109,676		387,173
Net income attributable to LKQ stockholders	109,676	107,782	387,173	343,100
Other comprehensive income (loss):
Foreign currency translation, net of tax	1,686	3,590	(2,800)	17,565
Net change in unrealized gains/losses on cash flow hedges, net of tax				(133)
Net change in unrealized gains/losses on pension plans, net of tax	(1,246)		(239)	(3,253)
Other comprehensive (loss) income	2,932	3,590	(3,039)	14,179
Comprehensive income	112,608		384,134
Comprehensive income (loss) attributable to LKQ stockholders	112,608	111,372	384,134	357,279
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Net income	24,914		82,931
Less: net income attributable to noncontrolling interest	378		1,040
Net income attributable to LKQ stockholders	24,536	34,602	81,891	124,038
Other comprehensive income (loss):
Foreign currency translation, net of tax	(23,901)	62,734	(81,456)	176,769
Net change in unrealized gains/losses on pension plans, net of tax	(28)	150	85	(800)
Net change in other comprehensive loss from unconsolidated subsidiaries	643	(1,034)	2,160	(1,635)
Other comprehensive (loss) income	(23,230)	61,550	(79,211)	174,334
Comprehensive income	1,684		3,720
Less: comprehensive income attributable to noncontrolling interest	378		1,040
Comprehensive income (loss) attributable to LKQ stockholders	1,306	96,152	2,680	298,372
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net income	(134,212)		(469,064)
Net income attributable to LKQ stockholders	(134,212)	(142,384)	(469,064)	(467,138)
Other comprehensive income (loss):
Foreign currency translation, net of tax	22,215	(66,324)	84,256	(194,334)
Net change in unrealized gains/losses on cash flow hedges, net of tax				133
Net change in unrealized gains/losses on pension plans, net of tax	1,274	(150)	154	4,053
Net change in other comprehensive loss from unconsolidated subsidiaries	(643)	1,034	(2,160)	1,635
Other comprehensive (loss) income	20,298	(65,140)	82,250	(188,513)
Comprehensive income	(113,914)		(386,814)
Comprehensive income (loss) attributable to LKQ stockholders	$ (113,914)	$ (207,524)	$ (386,814)	$ (655,651)

Condensed Consolidating Balance

Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 341,346			$ 279,766	$ 275,077
Receivables, net	1,255,876		$ 1,065,617	1,027,106
Inventories	2,794,894			2,380,783
Prepaid expenses and other current assets	200,944		178,987	134,479
Total current assets	4,593,060			3,822,134
Property, plant and equipment, net	1,201,003			913,089
Intangible assets:
Goodwill	4,475,266			3,536,511
Other intangibles, net	953,372			743,769
Equity method investments	157,409			208,404
Other assets	205,226			142,965
Total assets	11,585,336			9,366,872
Current liabilities:
Accounts payable	941,747			788,613
Accrued expenses:
Accrued payroll-related liabilities	153,536			143,424
Other accrued expenses	358,212			218,600
Refund liability	106,732		$ 83,019
Other current liabilities	57,088			45,727
Current portion of long-term obligations	118,365			126,360
Total current liabilities	1,735,680			1,322,724
Long-term obligations, excluding current portion	4,250,137			3,277,620
Deferred income taxes	325,537			252,359
Other noncurrent liabilities	376,566			307,516
Total Company stockholders' equity	4,840,460			4,198,169
Noncontrolling interest	56,956			8,484
Total stockholders' equity	4,897,416	$ 4,776,975		4,206,653	4,041,037	$ 3,856,685	$ 3,442,949
Total liabilities and stockholders’ equity	11,585,336			9,366,872
Parent
Current assets:
Cash and cash equivalents	48,265			34,360	20,286
Receivables, net	341
Intercompany receivables, net	7,173			2,669
Prepaid expenses and other current assets	15,452			34,136
Total current assets	71,231			71,165
Property, plant and equipment, net	845			910
Intangible assets:
Other intangibles, net	286
Investment in subsidiaries	5,351,986			5,952,687
Intercompany notes receivable	1,067,356			1,156,550
Other assets	90,293			70,590
Total assets	6,581,997			7,251,902
Current liabilities:
Accounts payable	2,615			5,742
Accrued expenses:
Accrued payroll-related liabilities	7,169			9,448
Other accrued expenses	12,656			5,219
Other current liabilities	283			282
Current portion of long-term obligations	0			16,468
Total current liabilities	22,723			37,159
Long-term obligations, excluding current portion	1,569,387			2,095,826
Intercompany notes payable				750,000
Deferred income taxes	9,715			12,402
Other noncurrent liabilities	139,712			158,346
Total Company stockholders' equity	4,840,460			4,198,169
Total stockholders' equity	4,840,460			4,198,169
Total liabilities and stockholders’ equity	6,581,997			7,251,902
Guarantors
Current assets:
Cash and cash equivalents	31,082			35,131	22,413
Receivables, net	366,781			290,958
Intercompany receivables, net				3,010
Inventories	1,323,201			1,334,766
Prepaid expenses and other current assets	94,787			44,849
Total current assets	1,815,851			1,708,714
Property, plant and equipment, net	589,898			563,262
Intangible assets:
Goodwill	2,005,560			2,010,209
Other intangibles, net	280,229			291,036
Investment in subsidiaries	114,721			102,931
Intercompany notes receivable	14,958			782,638
Equity method investments	16,075			336
Other assets	38,434			33,597
Total assets	4,875,726			5,492,723
Current liabilities:
Accounts payable	345,660			340,951
Intercompany payables, net	20,573			230
Accrued expenses:
Accrued payroll-related liabilities	48,463			65,811
Other accrued expenses	106,543			95,900
Refund liability	54,554
Other current liabilities	18,210			27,066
Current portion of long-term obligations	2,317			1,912
Total current liabilities	596,320			531,870
Long-term obligations, excluding current portion	14,027			7,372
Intercompany notes payable	617,389			677,708
Deferred income taxes	115,924			116,021
Other noncurrent liabilities	98,133			101,189
Total Company stockholders' equity	3,433,933			4,058,563
Total stockholders' equity	3,433,933			4,058,563
Total liabilities and stockholders’ equity	4,875,726			5,492,723
Non-Guarantors
Current assets:
Cash and cash equivalents	261,999			210,275	$ 232,378
Receivables, net	888,754			736,148
Intercompany receivables, net	20,573			230
Inventories	1,471,693			1,046,017
Prepaid expenses and other current assets	90,705			55,494
Total current assets	2,733,724			2,048,164
Property, plant and equipment, net	610,260			348,917
Intangible assets:
Goodwill	2,469,706			1,526,302
Other intangibles, net	672,857			452,733
Equity method investments	141,334			208,068
Other assets	76,499			38,778
Total assets	6,704,380			4,622,962
Current liabilities:
Accounts payable	593,472			441,920
Intercompany payables, net	7,173			5,679
Accrued expenses:
Accrued payroll-related liabilities	97,904			68,165
Other accrued expenses	239,013			117,481
Refund liability	52,178
Other current liabilities	38,595			18,379
Current portion of long-term obligations	116,048			107,980
Total current liabilities	1,144,383			759,604
Long-term obligations, excluding current portion	2,666,723			1,174,422
Intercompany notes payable	464,925			511,480
Deferred income taxes	199,898			123,936
Other noncurrent liabilities	138,721			47,981
Total Company stockholders' equity	2,032,774			1,997,055
Noncontrolling interest	56,956			8,484
Total stockholders' equity	2,089,730			2,005,539
Total liabilities and stockholders’ equity	6,704,380			4,622,962
Eliminations
Current assets:
Intercompany receivables, net	(27,746)			(5,909)
Total current assets	(27,746)			(5,909)
Intangible assets:
Investment in subsidiaries	(5,466,707)			(6,055,618)
Intercompany notes receivable	(1,082,314)			(1,939,188)
Total assets	(6,576,767)			(8,000,715)
Current liabilities:
Intercompany payables, net	(27,746)			(5,909)
Accrued expenses:
Total current liabilities	(27,746)			(5,909)
Intercompany notes payable	(1,082,314)			(1,939,188)
Total Company stockholders' equity	(5,466,707)			(6,055,618)
Total stockholders' equity	(5,466,707)			(6,055,618)
Total liabilities and stockholders’ equity	$ (6,576,767)			$ (8,000,715)

Condensed Consolidating State_3

Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net cash provided by operating activities			$ 521,167	$ 449,243
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	$ (56,342)	$ (43,992)	(171,763)	(135,537)
Acquisitions, net of cash acquired			(1,206,067)	(252,667)	$ (513,088)
Payments to Acquire Equity Method Investments			(11,066)	(7,114)
Proceeds from Divestiture of Businesses, Net of Cash Divested				301,297
Receipts of deferred purchase price on receivables under factoring arrangements			9,410	0
Other investing activities, net			7,970	9,864
Net cash used in investing activities			(1,371,516)	(84,157)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options			3,772	6,465
Taxes paid related to net share settlements of stock-based compensation awards			(4,768)	(5,095)
Debt issuance costs			(16,938)
Proceeds from issuance of Euro Notes (2026/28)			1,232,100
Borrowings under revolving credit facilities			1,025,496	424,976
Repayments under revolving credit facilities			(1,110,035)	(770,884)
Repayments under term loans			(114,800)	(27,884)
Borrowings under receivables securitization facility				8,525
(Repayments) borrowings of other debt, net			(38,695)	(24,522)
Payments of other obligations				(2,079)
Other financing activities, net			3,182	4,316
Net cash provided by (used in) financing activities			979,314	(347,063)
Effect of exchange rate changes on cash and cash equivalents			(67,385)	22,538
Net increase (decrease) in cash and equivalents			61,580	40,561
Cash and cash equivalents of continuing operations, beginning of period					279,766	$ 227,400
Add: Cash and cash equivalents of discontinued operations, beginning of period				7,116	7,116
Cash and cash equivalents of continuing and discontinued operations, beginning of period	341,346	275,077	341,346	275,077	279,766	234,516
Cash and cash equivalents, end of period	341,346	275,077	341,346	275,077	279,766
Repayments under receivables securitization facility				(9,925)
Parent
CASH FLOWS FROM OPERATING ACTIVITIES:
Net cash provided by operating activities			334,226	227,314
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment			(315)	(509)
Investment and intercompany note activity with subsidiaries			73,096	296,561
Proceeds from investment in subsidiary, distribution, return of capital			152,443
Other investing activities, net			887
Net cash used in investing activities			226,111	296,052
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options			3,772	6,465
Taxes paid related to net share settlements of stock-based compensation awards			(4,768)	5,095
Debt issuance costs			(1,354)
Borrowings under revolving credit facilities			304,000	187,000
Repayments under revolving credit facilities			(732,897)	(694,896)
Repayments under term loans			(114,800)	(27,884)
(Repayments) borrowings of other debt, net			(385)	(1,700)
Net cash provided by (used in) financing activities			(546,432)	(536,110)
Net increase (decrease) in cash and equivalents			13,905	(12,744)
Cash and cash equivalents of continuing operations, beginning of period					34,360	33,030
Cash and cash equivalents of continuing and discontinued operations, beginning of period						33,030
Cash and cash equivalents, end of period	48,265	20,286	48,265	20,286	34,360
Eliminations
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from investment in subsidiary, distribution, return of capital			(152,443)
Guarantors
CASH FLOWS FROM OPERATING ACTIVITIES:
Net cash provided by operating activities			142,626	162,114
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment			(93,063)	(70,292)
Acquisitions, net of cash acquired			(2,888)	(79,496)
Payments to Acquire Equity Method Investments			11,066	2,200
Proceeds from Divestiture of Businesses, Net of Cash Divested				305,740
Receipts of deferred purchase price on receivables under factoring arrangements			224,753	226,395
Other investing activities, net			2,162	(3,100)
Net cash used in investing activities			119,898	383,247
CASH FLOWS FROM FINANCING ACTIVITIES:
(Repayments) borrowings of other debt, net			101	(1,238)
Payments of other obligations				1,336
Other financing activities, net				5,000
Investment and intercompany note activity with parent			(62,763)	(286,530)
Dividends			(203,448)	(274,675)
Net cash provided by (used in) financing activities			(266,110)	(558,779)
Effect of exchange rate changes on cash and cash equivalents			(463)	322
Net increase (decrease) in cash and equivalents			(4,049)	(13,096)
Cash and cash equivalents of continuing operations, beginning of period					35,131	35,360
Cash and cash equivalents of continuing and discontinued operations, beginning of period						35,509
Cash and cash equivalents, end of period	31,082	22,413	31,082	22,413	35,131
Non-Guarantors
CASH FLOWS FROM OPERATING ACTIVITIES:
Net cash provided by operating activities			97,506	108,095
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment			(78,385)	(64,736)
Investment and intercompany note activity with subsidiaries			0
Acquisitions, net of cash acquired			(1,203,179)	(173,171)
Payments to Acquire Equity Method Investments				4,914
Proceeds from Divestiture of Businesses, Net of Cash Divested				(4,443)
Receipts of deferred purchase price on receivables under factoring arrangements			9,410
Other investing activities, net			4,921	(6,764)
Net cash used in investing activities			(1,267,233)	(240,500)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt issuance costs			(15,584)
Proceeds from issuance of Euro Notes (2026/28)			1,232,100
Borrowings under revolving credit facilities			721,496	237,976
Repayments under revolving credit facilities			(377,138)	(75,988)
Repayments under term loans			0
Borrowings under receivables securitization facility				8,525
(Repayments) borrowings of other debt, net			(38,411)	27,460
Payments of other obligations				743
Other financing activities, net			3,182	(684)
Investment and intercompany note activity with parent			(10,333)	(10,031)
Dividends			(226,939)
Net cash provided by (used in) financing activities			1,288,373	176,590
Effect of exchange rate changes on cash and cash equivalents			(66,922)	22,216
Net increase (decrease) in cash and equivalents			51,724	66,401
Cash and cash equivalents of continuing operations, beginning of period					210,275	159,010
Cash and cash equivalents of continuing and discontinued operations, beginning of period						$ 165,977
Cash and cash equivalents, end of period	$ 261,999	$ 232,378	261,999	232,378	210,275
Repayments under receivables securitization facility				(9,925)
Continuing and Discontinued Operations
CASH FLOWS FROM FINANCING ACTIVITIES:
Add: Cash and cash equivalents of discontinued operations, beginning of period				7,116	7,116
Continuing and Discontinued Operations | Guarantors
CASH FLOWS FROM FINANCING ACTIVITIES:
Add: Cash and cash equivalents of discontinued operations, beginning of period				149	149
Continuing and Discontinued Operations | Non-Guarantors
CASH FLOWS FROM FINANCING ACTIVITIES:
Add: Cash and cash equivalents of discontinued operations, beginning of period				6,967	$ 6,967
Eliminations
CASH FLOWS FROM OPERATING ACTIVITIES:
Net cash provided by operating activities			(53,191)	(48,280)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment			0
Investment and intercompany note activity with subsidiaries			(73,096)	(296,561)
Receipts of deferred purchase price on receivables under factoring arrangements			(224,753)	(226,395)
Net cash used in investing activities			(450,292)	(522,956)
CASH FLOWS FROM FINANCING ACTIVITIES:
Investment and intercompany note activity with parent			73,096	296,561
Dividends			430,387	274,675
Net cash provided by (used in) financing activities			$ 503,483	$ 571,236