VALVOLINE Acquisitions (Details) number in Millions, $ in Millions		3 Months Ended	6 Months Ended		12 Months Ended
		Mar. 31, 2017 USD ($) site	Mar. 31, 2017 USD ($) site	Mar. 31, 2016 USD ($)	Sep. 30, 2016 USD ($) site
Business Acquisition [Line Items]
Goodwill, Acquired During Period	[1]		$ 49
Payments to Acquire Businesses, Net of Cash Acquired			$ 48	$ 66
Time-It Lube [Member]
Business Acquisition [Line Items]
Number of Stores | site		28	28
Purchase of Business, Transaction Value		$ 48	$ 48
Goodwill, Acquired During Period		$ 44	$ 44
Oil Can Henry's [Member]
Business Acquisition [Line Items]
Number of Stores | site					89
Purchase of Business, Transaction Value					$ 72
Goodwill, Acquired During Period					$ 83
Number of vehicles serviced annually.					1
Number of company-owned stores | site					47
Number of franchise locations | site					42
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt					$ 11
Payments to Acquire Businesses, Net of Cash Acquired					$ 62

[1] Relates to $44 million for the acquisition of Time-It Lube and $5 million for Valvoline Instant Oil ChangeSM center acquisitions during the six months ended March 31, 2017. See Note B for more information on the acquisition of Time-It Lube.