Guarantor Financial Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows provided by operating activities	$ 59	$ 85
Cash flows from investing activities
Additions to property, plant and equipment	(28)	(27)
Acquisitions, net of cash acquired	(6)	(30)
Other investing activities, net	(1)	1
Total cash used in investing activities	(35)	(56)
Cash flows from financing activities
Proceeds from borrowings, net of issuance costs	0	100
Repayments on borrowings		(101)
Cash dividends paid	(21)	(20)
Other financing activities	(2)	(4)
Total cash used in financing activities	(23)	(25)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	3	(1)
Increase (decrease) in cash, cash equivalents, and restricted cash	4	3
Cash, cash equivalents, and restricted cash - beginning of period	159	96
Cash, cash equivalents, and restricted cash - end of period	163	99
Reportable Legal Entities | Valvoline Inc. (Parent Issuer)
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows provided by operating activities	23	13
Cash flows from investing activities
Additions to property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Other investing activities, net	0	0
Total cash used in investing activities	0	0
Cash flows from financing activities
Proceeds from borrowings, net of issuance costs		57
Repayments on borrowings		(48)
Cash dividends paid	(21)	(20)
Other financing activities	(2)	(2)
Total cash used in financing activities	(23)	(13)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	0	0
Increase (decrease) in cash, cash equivalents, and restricted cash	0	0
Cash, cash equivalents, and restricted cash - beginning of period	0	0
Cash, cash equivalents, and restricted cash - end of period	0	0
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows provided by operating activities	31	29
Cash flows from investing activities
Additions to property, plant and equipment	(21)	(20)
Acquisitions, net of cash acquired	(6)	(8)
Other investing activities, net	(1)	1
Total cash used in investing activities	(28)	(27)
Cash flows from financing activities
Proceeds from borrowings, net of issuance costs		0
Repayments on borrowings		0
Cash dividends paid	0	0
Other financing activities	0	(1)
Total cash used in financing activities	0	(1)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	0	0
Increase (decrease) in cash, cash equivalents, and restricted cash	3	1
Cash, cash equivalents, and restricted cash - beginning of period	59	20
Cash, cash equivalents, and restricted cash - end of period	62	21
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows provided by operating activities	5	43
Cash flows from investing activities
Additions to property, plant and equipment	(7)	(7)
Acquisitions, net of cash acquired	0	(22)
Other investing activities, net	0	0
Total cash used in investing activities	(7)	(29)
Cash flows from financing activities
Proceeds from borrowings, net of issuance costs		43
Repayments on borrowings		(53)
Cash dividends paid	0	0
Other financing activities	0	(1)
Total cash used in financing activities	0	(11)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	3	(1)
Increase (decrease) in cash, cash equivalents, and restricted cash	1	2
Cash, cash equivalents, and restricted cash - beginning of period	100	76
Cash, cash equivalents, and restricted cash - end of period	101	78
Eliminations
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows provided by operating activities	0	0
Cash flows from investing activities
Additions to property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Other investing activities, net	0	0
Total cash used in investing activities	0	0
Cash flows from financing activities
Proceeds from borrowings, net of issuance costs		0
Repayments on borrowings		0
Cash dividends paid	0	0
Other financing activities	0	0
Total cash used in financing activities	0	0
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	0	0
Increase (decrease) in cash, cash equivalents, and restricted cash	0	0
Cash, cash equivalents, and restricted cash - beginning of period	0	0
Cash, cash equivalents, and restricted cash - end of period	$ 0	$ 0