Reportable Segment Information - Sales and Operating Income by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Sales	$ 577	$ 534	$ 1,691	$ 1,537
Operating income (loss)	102	87	290	281
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	99	100	304	306
Operating Segments | Core North America
Segment Reporting Information [Line Items]
Sales	264	258	773	748
Operating income (loss)	41	48	130	156
Operating Segments | Quick Lubes
Segment Reporting Information [Line Items]
Sales	167	139	479	394
Operating income (loss)	38	34	111	94
Operating Segments | International
Segment Reporting Information [Line Items]
Sales	146	137	439	395
Operating income (loss)	20	18	63	56
Unallocated and Other
Segment Reporting Information [Line Items]
Operating income (loss)	$ 3	$ (13)	$ (14)	$ (25)