Reportable Segment Information - Sales and Operating Income by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Sales	$ 545	$ 489
Operating income (loss)	88	94
Income tax expense	94	38
Separation costs	2	6
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	97	100
Operating Segments | Core North America
Segment Reporting Information [Line Items]
Sales	251	237
Operating income (loss)	43	51
Operating Segments | Quick Lubes
Segment Reporting Information [Line Items]
Sales	154	127
Operating income (loss)	35	29
Operating Segments | International
Segment Reporting Information [Line Items]
Sales	140	125
Operating income (loss)	19	20
Unallocated and Other
Segment Reporting Information [Line Items]
Operating income (loss)	(9)	(6)
Income tax expense	7
Separation costs	$ 2	$ 6