Goodwill and Other Intangible Assets - Summary of Goodwill by Segment (Details) $ in Millions	3 Months Ended
Dec. 31, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 330
Acquisitions	30
Goodwill, ending balance	360
Core North America
Goodwill [Roll Forward]
Goodwill, beginning balance	89
Acquisitions	0
Goodwill, ending balance	89
Quick Lubes
Goodwill [Roll Forward]
Goodwill, beginning balance	201
Acquisitions	30
Goodwill, ending balance	231
International
Goodwill [Roll Forward]
Goodwill, beginning balance	40
Acquisitions	0
Goodwill, ending balance	$ 40

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant