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Segment Data (Details)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 29, 2018

USD ($)

number

Sep. 30, 2017

USD ($)

Sep. 29, 2018

USD ($)

number

Sep. 30, 2017

USD ($)

Segment Reporting [Abstract]

Number of reportable segments | number

2

Number of countries served globally | number

34

34

Segment Reporting Information [Line Items]

Net sales

$ 3,279,678

$ 3,161,083

$ 9,826,793

$ 9,143,489

Operating income

165,926

213,548

573,417

618,178

Healthcare Distribution [Member]

Segment Reporting Information [Line Items]

Net sales

^[1]

3,135,775

3,052,071

9,456,610

8,819,979

Operating income

127,990

181,612

471,543

521,278

Healthcare Distribution [Member] | Dental [Member]

Segment Reporting Information [Line Items]

Net sales

1,514,538

1,478,730

4,675,212

4,372,055

Healthcare Distribution [Member] | Animal Health [Member]

Segment Reporting Information [Line Items]

Net sales

899,295

882,580

2,805,031

2,586,850

Healthcare Distribution [Member] | Medical [Member]

Segment Reporting Information [Line Items]

Net sales

721,942

690,761

1,976,367

1,861,074

Technology and Value-Added Services [Member]

Segment Reporting Information [Line Items]

Net sales

^[2]

143,903

109,012

370,183

323,510

Operating income

$ 37,936

$ 31,936

$ 101,874

$ 96,900

[1]	Consists of consumable products, small equipment, laboratory products, large equipment, equipment repair services, branded and generic pharmaceuticals, vaccines, surgical products, diagnostic tests, infection-control products and vitamins.
[2]	Consists of practice management software and other value-added products, which are distributed primarily to health care providers, and financial services on a non-recourse basis, e-services, continuing education services for practitioners, consulting and other services.

X

- Definition

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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- Definition

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
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-Name Accounting Standards Codification
-Topic 220
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-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

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