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Stock Incentive Plans - Summary of Progression of Activity and Various Other Information Relative Nonvested Stock Awards (Details) - Nonvested Stock Awards [Member] - $ / shares
shares in Thousands

12 Months Ended

Sep. 30, 2019

Sep. 30, 2018

Sep. 30, 2017

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]

Nonvested - beginning of year

291

219

293

Granted

96

192

92

Vested

(151)

(107)

(189)

Forfeitures

(21)

(13)

(24)

Transfer to Valvoline Inc.

^[1]

(71)

Conversion adjustment

^[2]

118

Nonvested - end of year

215

291

219

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]

Weighted-average grant date fair value, nonvested - beginning of year

$ 66.98

$ 59.16

$ 109.12

Weighted-average grant date fair value, granted

81.31

71.36

105.10

Weighted-average grant date fair value, vested

66.24

59.46

99.69

Weighted-average grant date fair value, forfeitures

73.63

62.22

104.19

Weighted-average grant date fair value, transfer to Valvoline Inc.

^[1]

111.97

Weighted-average grant date fair value, nonvested - end of year

$ 73.26

$ 66.98

$ 59.16

[1]	Represents the transfer of nonvested stock awards held by Valvoline Inc. employees at the time of the final Valvoline Inc. distribution in 2017.
[2]	The number and exercise prices of nonvested stock awards outstanding at the time of the final Valvoline Inc. distribution in 2017 were proportionately adjusted to maintain the aggregate intrinsic value before and after the transaction.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options transferred.

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Represents the conversion adjustments for shares outstanding at the time of the final distribution of Valvoline Inc.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for awards that transferred to Valvoline Inc. upon final distribution.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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