Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 55
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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

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Balance Type:	debit
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- Definition

Amount as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective interest rate fair value hedge that is amortized upon discontinuation of the interest rate fair value hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 815
-SubTopic 25
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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate during the reporting period.

+ References

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-Topic 210
-SubTopic 10
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Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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-Name Accounting Standards Codification
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-Paragraph 1
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Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payment applied to principal.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Balance Type:	debit
Period Type:	duration

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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-Name Accounting Standards Codification
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Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Financing Agreements (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015	Apr. 30, 2015
Debt Instrument [Line Items]
Outstanding letters of credit	$ 7.9
Deferred gains from the termination of previous interest rate swap agreements	1.0		$ 1.0
Payment of long-term debt	34.5	$ 3.8
Unamortized debt issuance costs	37.2		39.1
Senior Secured Term Loan A [Member]
Debt Instrument [Line Items]
Senior revolving credit facility, maximum borrowing amount	$ 1,000.0
Debt instrument, maturity date	Sep. 30, 2020
Maximum interest rate during period	4.00%
Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Senior revolving credit facility, maximum borrowing amount	$ 800.0
Debt instrument, maturity date	Sep. 30, 2022
Amount of principal payment	$ 8.0
Payment of long-term debt	$ 20.0
Maximum interest rate during period	4.00%
Senior Secured Revolving Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Senior revolving credit facility, maximum borrowing amount	$ 500.0
Debt instrument, maturity date	Sep. 30, 2020
Maximum interest rate during period	4.00%
Current borrowing capacity under the facility	$ 492.1
Unamortized debt issuance costs	8.9		$ 9.4
Senior Unsecured 5.75% Notes due on September 1, 2023 [Member]
Debt Instrument [Line Items]
Aggregate value of debt	$ 425.0
Debt instrument, maturity date	Sep. 01, 2023
Previous Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Senior revolving credit facility, maximum borrowing amount				$ 500.0
Previous Credit Facility [Member] \| Term Loan under August 2012 Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate value of debt				$ 200.0