Reportable Segment Information - Financial Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Sales	$ 514	$ 480	$ 1,003	$ 936
Operating Income	117	104	237	200
Gain (loss) from actuarial remeasurements			8	0
Separation costs	6	0	12	0
Core North America
Segment Reporting Information [Line Items]
Sales	253	248	490	489
Quick Lubes
Segment Reporting Information [Line Items]
Sales	128	113	255	213
International
Segment Reporting Information [Line Items]
Sales	133	119	258	234
Operating Segments
Segment Reporting Information [Line Items]
Operating Income	106	105	206	197
Operating Segments | Core North America
Segment Reporting Information [Line Items]
Operating Income	57	59	108	112
Operating Segments | Quick Lubes
Segment Reporting Information [Line Items]
Operating Income	31	29	60	52
Operating Segments | International
Segment Reporting Information [Line Items]
Operating Income	18	17	38	33
Unallocated and Other
Segment Reporting Information [Line Items]
Operating Income	11	(1)	31	3
Gain (loss) from actuarial remeasurements		$ (5)	8	$ (5)
Separation costs	$ 6		$ 12