Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Cash and Cash Equivalents
Minimum period in which customer credit and debit card transactions are settled	1 day
Maximum period in which customer credit and debit card transactions are settled	3 days
Proceeds due from customers of credit and debit card and PayPal transactions	$ 13.3	$ 10.6
Inventory
Average approximate inventory shrinkage, as percentage of consolidated net sales	1.00%	1.00%	1.00%
Goodwill and Intangible Assets with Indefinite Lives
Impairment losses in connection with the goodwill	0	0	0
Impairment of intangible assets with indefinite lives	0	0	0
Revenue Recognition
Sales returns and allowance, average of net sales (as a percent)	2.00%	2.00%	2.00%
Shipping and Handling
Shipping and handling costs	52.2	48.5	41.3
Advertising Costs
Advertising costs	$ 90.2	$ 83.9	$ 79.8
Intangible assets with definite lives
Estimated useful life	5 years 10 months 24 days
Minimum
Intangible assets with definite lives
Estimated useful life	1 year
Maximum
Intangible assets with definite lives
Estimated useful life	12 years

Represents the maximum number of days in which the customer credit and debit card transactions gets settled.

No definition available.

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- Definition

Represents the minimum number of days in which customer credit and debit card transactions gets settled.

+ References

No definition available.

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- Definition

Represents the average inventory shrinkage, as a percentage of net sales over a certain period of time.

+ References

No definition available.

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- Definition

Represents the sales returns and allowances, as a percentage of net sales.

+ References

No definition available.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

-Paragraph 1

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- Definition

Amount due the Entity as a result of customers utilizing point of sale debit or credit cards in exchange transactions with the entity which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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- Definition

Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

+ References

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-Publisher FASB

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