Cover Page - USD ($) $ in Billions	12 Months Ended
	Sep. 30, 2019	Nov. 15, 2019	Mar. 31, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-37884
Entity Registrant Name	VALVOLINE INC
Entity Incorporation, State or Country Code	KY
Entity Tax Identification Number	30-0939371
Entity Address, Address Line One	100 Valvoline Way
Entity Address, City or Town	Lexington
Entity Address, State or Province	KY
Entity Address, Postal Zip Code	40509
City Area Code	859
Local Phone Number	357-7777
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	VVV
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 3.5
Entity Common Stock, Shares Outstanding		188,395,670
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0001674910
Current Fiscal Year End Date	--09-30
Documents Incorporated by Reference	Portions of the Registrant’s definitive proxy statement (“Proxy Statement”) for its 2020 Annual Meeting of Shareholders, which will be filed within 120 days of the Registrant’s fiscal year end, are incorporated by reference into Part III of this Annual Report on Form 10-K.