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Property and Equipment (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Property and equipment
Property and equipment, gross	$ 722,100,000	$ 663,100,000
Accumulated depreciation and amortization	(440,100,000)	(392,400,000)
Property and equipment, net	281,979,000	270,672,000
Depreciation expense	69,100,000	70,700,000	77,100,000
Amortization of capitalized software costs	7,300,000	6,400,000	6,200,000
Unamortized capitalized software costs	39,900,000	29,600,000	24,100,000
Minimum [Member]
Property and equipment
Useful Lives	3 years
Maximum
Property and equipment
Useful Lives	10 years
Land, Buildings and Improvements [Member]
Property and equipment
Property and equipment, gross	11,500,000	4,400,000
Useful Lives	27 years
Leasehold Improvements [Member]
Property and equipment
Property and equipment, gross	299,700,000	289,900,000
Leasehold Improvements [Member] | Minimum [Member]
Property and equipment
Useful Lives	2 years
Leasehold Improvements [Member] | Maximum
Property and equipment
Useful Lives	12 years
Computer Equipment [Member]
Property and equipment
Property and equipment, gross	302,600,000	257,000,000
Computer Equipment [Member] | Minimum [Member]
Property and equipment
Useful Lives	3 years
Computer Equipment [Member] | Maximum
Property and equipment
Useful Lives	10 years
Furniture and Fixtures [Member]
Property and equipment
Property and equipment, gross	101,500,000	106,400,000
Furniture and Fixtures [Member] | Minimum [Member]
Property and equipment
Useful Lives	5 years
Furniture and Fixtures [Member] | Maximum
Property and equipment
Useful Lives	10 years
Automobiles [Member]
Property and equipment
Property and equipment, gross	$ 6,800,000	$ 5,400,000
Automobiles [Member] | Minimum [Member]
Property and equipment
Useful Lives	3 years
Automobiles [Member] | Maximum
Property and equipment
Useful Lives	10 years

X

- Definition

Unamortized costs incurred for development of computer software.

+ References

No definition available.

+ Details

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.14)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

-Article 5

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- Definition

For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756



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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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-Paragraph 1

-Subparagraph (SX 210.5-02.13)

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- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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-Topic 210

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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