Business Acquisition, Percentage of Voting Interests Intended to be Acquired

No definition available.

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Namespace Prefix:	gpc_
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- Definition

Business Acquisition, Price per Share Intended to be Acquired

+ References

No definition available.

+ Details

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Namespace Prefix:	gpc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Shares Outstanding of Combined Company, Diluted

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

+ Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

Name:	us-gaap_BusinessAcquisitionAxis=gpc_EssendantMember
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- Details

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Acquisitions and Divestitures (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	5 Months Ended
	Dec. 31, 2018	Jun. 30, 2018
Business Products Group [Member] \| Scenario, Forecast [Member]
Business Acquisition [Line Items]
Proceeds from divestiture of businesses	$ 347
Company's Shareholders [Member] \| Scenario, Forecast [Member]
Business Acquisition [Line Items]
Ownership percentage by parent	51.00%
Essendant Shareholders [Member] \| Scenario, Forecast [Member]
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners	49.00%
Combined Company [Member] \| Scenario, Forecast [Member]
Business Acquisition [Line Items]
Shares outstanding of combined company, diluted (in shares)	80
Essendant [Member] \| Staples [Member]
Business Acquisition [Line Items]
Percentage of voting interests		100.00%
Share price (usd per share)		$ 11.50