Schedule of Financial Performance by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information
Revenue	$ 11,876,674	$ 9,736,909	$ 8,584,031
Segment EBITDA	1,251,399	1,116,590	1,004,980
Depreciation and amortization	294,077	230,203	206,086
North America
Segment Reporting Information
Revenue	5,182,609	4,799,651	4,444,625
Segment EBITDA	660,153	655,275	589,945
Depreciation and amortization	87,348	86,303
Europe
Segment Reporting Information
Revenue	5,221,754	3,636,811	2,920,470
Segment EBITDA	422,721	319,156	283,608
Depreciation and amortization	178,473	120,805
Specialty
Segment Reporting Information
Revenue	1,477,680	1,305,516	1,223,723
Segment EBITDA	168,525	142,159	131,427
Depreciation and amortization	28,256	23,095
Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	(5,369)	(5,069)	(4,787)
Segment EBITDA	0	0	0
Depreciation and amortization	0	0
Third Party [Member]
Segment Reporting Information
Revenue	11,876,674	9,736,909	8,584,031
Third Party [Member] \| North America
Segment Reporting Information
Revenue	5,181,964	4,798,901	4,443,886
Third Party [Member] \| Europe
Segment Reporting Information
Revenue	5,221,754	3,636,811	2,920,470
Third Party [Member] \| Specialty
Segment Reporting Information
Revenue	1,472,956	1,301,197	1,219,675
Third Party [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	0	0	0
Intersegment [Member]
Segment Reporting Information
Revenue	0	0	0
Intersegment [Member] \| North America
Segment Reporting Information
Revenue	645	750	739
Intersegment [Member] \| Europe
Segment Reporting Information
Revenue	0	0	0
Intersegment [Member] \| Specialty
Segment Reporting Information
Revenue	4,724	4,319	4,048
Intersegment [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	$ (5,369)	$ (5,069)	(4,787)
Continuing Operations [Member]
Segment Reporting Information
Depreciation and amortization			198,334
Continuing Operations [Member] \| North America
Segment Reporting Information
Depreciation and amortization			80,923
Continuing Operations [Member] \| Europe
Segment Reporting Information
Depreciation and amortization			94,979
Continuing Operations [Member] \| Specialty
Segment Reporting Information
Depreciation and amortization			22,432
Continuing Operations [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information
Depreciation and amortization			$ 0

Segment EBITDA includes revenue and expenses that are controllable by the segment. Corporate and administrative expenses are allocated to the segments based on usage, with shared expenses apportioned based on the segment's percentage of consolidated revenue. Segment EBITDA excludes restructuring and acquisition related expenses, depreciation, amortization, interest, change in fair value of contingent consideration liabilities, taxes and equity in earnings of unconsolidated subsidiaries. Loss on debt extinguishment is considered a component of interest in calculating EBITDA, as the write-off of debt issuance costs is similar to the treatment of debt issuance cost amortization.

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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