Accounts Receivable - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Receivables [Abstract]
Accounts receivable sold to financial institutions	$ 75	$ 129

Accounts Receivable, Factoring Agreement, Amount Of Receivables Sold

No definition available.

Name:	vvv_AccountsReceivableFactoringAgreementAmountOfReceivablesSold
Namespace Prefix:	vvv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant