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Borrowing Arrangements (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended |  | 0 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended | 3 Months Ended |  | 3 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2014 Swing Line Loans [Member] | Sep. 30, 2014 Letter Of Credit [Member] | Sep. 30, 2014 Eight Point Seven Five Senior Unsecured Notes [Member] | Sep. 30, 2013 Eight Point Seven Five Senior Unsecured Notes [Member] | Aug. 29, 2014 Seven Point Three Seven Five Senior Subordinated Notes [Member] | Sep. 30, 2014 Seven Point Three Seven Five Senior Subordinated Notes [Member] | Sep. 30, 2014 Seven Point Three Seven Five Senior Subordinated Notes [Member] | Sep. 30, 2013 Seven Point Three Seven Five Senior Subordinated Notes [Member] | Sep. 30, 2014 ABL Agreement [Member] | Sep. 30, 2013 ABL Agreement [Member] | Sep. 30, 2014 Minimum [Member] | Sep. 30, 2014 Maximum [Member] | Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Minimum [Member] ABL Agreement [Member] | Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Maximum [Member] ABL Agreement [Member] | Sep. 30, 2014 Base Rate [Member] Minimum [Member] ABL Agreement [Member] | Sep. 30, 2014 Base Rate [Member] Maximum [Member] ABL Agreement [Member] | Dec. 31, 2014 Subsequent Event [Member] London Interbank Offered Rate (LIBOR) [Member] Long-term Debt, Type [Member] | Nov. 25, 2014 Subsequent Event [Member] London Interbank Offered Rate (LIBOR) [Member] Long-term Debt, Type [Member] | Dec. 31, 2014 Subsequent Event [Member] London Interbank Offered Rate (LIBOR) [Member] Minimum [Member] Long-term Debt, Type [Member]
Long-term Debt | $ 545.6 | $ 600.8 |  |  |  | $ 178.3 | $ 178.0 |  | $ 365.0 | $ 365.0 | $ 420.0 | $ 0 | $ 0 |  |  |  |  |  |  |  | $ 500.0 |
Debt Instrument, Description of Variable Rate Basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.75%
Revolving credit facility amount |  |  |  | 25 | 60 |  |  |  |  |  |  | 225 |  |  |  |  |  |  |  |  |  |
Potential increase size of the credit facility by an additional amount |  |  |  |  |  |  |  |  |  |  |  | 150 |  |  |  |  |  |  |  |  |  |
Borrowing rate in addition to LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17500.00% | 22500.00% | 7500.00% | 12500.00% | 32500.00% |  |
Debt Instrument, Maturity Date Range, Start |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Mar. 31, 2015 |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25 |  |
Line of Credit Facility, Interest Rate at Period End |  |  |  |  |  |  |  |  |  |  |  | 17500.00% |  |  |  |  |  |  |  |  |  |
Agreement termination date | Dec. 18, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate commitments availability |  |  |  |  |  |  |  |  |  |  |  | 22.5 |  |  |  |  |  |  |  |  |  |
Aggregate commitments availability, percentage |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Outstanding letter of credit accrued fees and expenses |  |  |  |  |  |  |  |  |  |  |  | 29.1 |  |  |  |  |  |  |  |  |  |
Excess availability reduced by outstanding borrowings, outstanding letters of credit and accrued fees and expenses |  |  |  |  |  |  |  |  |  |  |  | 158.3 |  |  |  |  |  |  |  |  |  |
Senior subordinated notes bear interest |  |  |  |  |  | 8.75% |  |  | 7.375% | 7.375% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  |  | Sep. 01, 2020 |  |  |  | Jun. 01, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  |  |  |  |  |  |  |  |  |  | 3750.00% |  | 2500.00% | 3750.00% |  |  |  |  |  |  |
Unamortized discount |  |  |  |  |  | 1.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated notes fair value |  |  |  |  |  | 193.5 |  |  | 369.6 | 369.6 |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount | 22.5 |  |  |  |  |  |  | 55.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 103.00% |  |  |  |  |  |  | 101.229% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt | 1.0 | 1.4 | 1.5 |  |  |  |  |  | (1.0) |  |  |  |  |  |  |  |  |  |  | (31.3) |  |
Future maturities of outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CY plus 1 | 46.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CY plus 2 | 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CY plus 3 | 320.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CY plus 4 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CY plus 5 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CY plus 6 and more | 180.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 10 years |  |  |  |  | 7 years |  |
Payments of Debt Extinguishment Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50 |  |
Payments of Financing Costs | $ 0 | $ 0.7 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8.0 |  |

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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal. + References No definition available. + Details
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- Definition The cash outflow for loan and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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