Expected Growth Rate

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- Definition

Fair value inputs, customer retention rate.

+ References

No definition available.

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- Definition

Fair Value Inputs Discounted Rate

+ References

No definition available.

+ Details

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- Definition

Fair value inputs, estimated income tax rate.

+ References

No definition available.

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- Definition

Non Controlling Interest Ownership Remaining Percentage Purchased

+ References

No definition available.

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- Definition

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Face amount or stated value per share of common stock.

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions				12 Months Ended
	Jun. 01, 2017	May 18, 2017	May 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Par value				$ 0.01	$ 0.01
General and administrative expenses				$ 350.7	$ 355.2	$ 286.4
Spectrum Merger [Member]
Business Acquisition [Line Items]
General and administrative expenses				$ 45.9	$ 7.6
PetMatrix [Member]
Business Acquisition [Line Items]
Acquisition date					Jun. 01, 2017
Estimated income tax rate	35.00%
Discounted rate	12.00%
Purchase price	$ 255.2
PetMatrix [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Expected growth rate	2.00%
PetMatrix [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Expected growth rate	20.00%
Customer retention rate	98.00%
GloFish [Member]
Business Acquisition [Line Items]
Acquisition date					May 12, 2017
Estimated income tax rate			35.00%
Discounted rate			12.00%
Purchase price			$ 49.7
Shaser [Member]
Business Acquisition [Line Items]
Percentage of remaining non-controlling interest purchased		44.00%
Purchase price		$ 12.6
Increase to additional paid-in capital		$ 24.1