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Retirement Plans (Tables) | 12 Months Ended
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Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract] |
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] | The following table presents changes in, and components of, the Company’s net liability for retirement costs as of and for the years ended September 30, 2015, 2014, and 2013, based on measurement dates of September 30, 2015, 2014, and 2013, respectively:
(in millions) | September 30, 2015 |  | September 30, 2014 |  | September 30, 2013
Changes in benefit obligation: |  |  |  |  |
Benefit obligation, beginning of year | $ | 38.2 |  |  | $ | 37.5 |  |  | $ | 42.8 |
Interest cost | 1.5 |  |  | 1.7 |  |  | 1.5 |
Actuarial loss | 0.6 |  |  | 2.3 |  |  | (2.6 | )
Benefits paid | (3.2 | ) |  | (3.3 | ) |  | (4.2 | )
Benefit obligation, end of year | 37.1 |  |  | 38.2 |  |  | 37.5 |
Changes in plan assets: |  |  |  |  |
Fair value, beginning of year | 31.2 |  |  | 28.9 |  |  | 26.5 |
Actual return | — |  |  | 2.9 |  |  | 3.7 |
Employer contribution | 2.2 |  |  | 2.7 |  |  | 2.9 |
Benefits paid | (3.2 | ) |  | (3.3 | ) |  | (4.2 | )
Fair value, end of year | 30.2 |  |  | 31.2 |  |  | 28.9 |
Funded status | $ | (6.9 | ) |  | $ | (7.0 | ) |  | $ | (8.6 | )
Schedule of Accumulated and Projected Benefit Obligations [Table Text Block] | The following table displays the Company’s defined benefit plans that have accumulated benefit obligations and projected benefit obligations in excess of the fair value of plans assets (underfunded ABO) as of September 30, 2015 and 2014:
(in millions) | September 30, 2015 |  | September 30, 2014
Accumulated benefit obligations | $ | 37.1 |  |  | $ | 38.2 |
Projected benefit obligations | $ | 37.1 |  |  | $ | 38.2 |
Plan assets | $ | 30.2 |  |  | $ | 31.2 |
Schedule of Assumptions Used [Table Text Block] | The following weighted-average assumptions were used to determine benefit obligations in the accompanying consolidated balance sheets as of September 30, 2015 and 2014:
| September 30, 2015 |  | September 30, 2014
Weighted average assumptions: |  |  |
Discount rate | 4.25% |  | 4.15%
Expected return on assets | 5.94% |  | 6.00%
The following weighted-average assumptions were used to determine net periodic pension cost for the years ended September 30, 2015, 2014, and 2013:
| Year Ended September 30,
| 2015 |  | 2014 |  | 2013
Weighted average assumptions: |  |  |  |  |
Discount rate | 4.15% |  | 4.60% |  | 3.80%
Expected return on assets | 6.00% |  | 7.00% |  | 7.00%
Schedule of Net Benefit Costs [Table Text Block] | The components of net periodic pension cost recognized in the consolidated income statements for the years ended September 30, 2015, 2014, and 2013 were as follows:
| Year Ended September 30,
(in millions) | 2015 |  | 2014 |  | 2013
Interest cost | $ | 1.5 |  |  | $ | 1.7 |  |  | $ | 1.5 |
Less expected return on assets | (1.8 | ) |  | (2.0 | ) |  | (1.8 | )
Net amortization and deferral | 0.3 |  |  | 0.2 |  |  | 0.8 |
Net periodic pension cost | $ | — |  |  | $ | (0.1 | ) |  | $ | 0.5 |
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | Other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended September 30, 2015 and 2014 were as follows:
| Year Ended September 30,
(in millions) | 2015 |  | 2014
Net (gain) loss | $ | 2.4 |  |  | $ | 1.4 |
Amortization of loss | (0.3 | ) |  | (0.2 | )
Total recognized in other comprehensive income | 2.1 |  |  | 1.2 |
Total recognized in net periodic benefit cost and other comprehensive income | $ | 2.1 |  |  | $ | 1.1 |
Schedule of Allocation of Plan Assets [Table Text Block] | The following table sets forth the actual asset allocation as of September 30, 2015 and 2014, and the target asset allocation for the Company’s plan assets:
| September 30, 2015 |  | September 30, 2014 |  | Target Asset Allocation
Equity securities | 33% |  | 34% |  | 35%
Debt securities | 67% |  | 66% |  | 65%
Total | 100% |  | 100% |  |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following tables summarize the Company’s pension assets, excluding cash held in the plan, by major category of plan assets measured at fair value on a recurring basis (at least annually) as of September 30, 2015 and 2014. For additional information and a detailed description of each level within the fair value hierarchy, see Note 3.
| September 30, 2015
(in millions) | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |
Cash equivalents | $ | — |  |  | $ | 0.6 |  |  | $ | — |  |  | $ | 0.6 |
Fixed income: |  |  |  |  |  |  |  |  |  |  |
Government and agencies | — |  |  | — |  |  | — |  |  | — |
Collective funds: |  |  |  |  |  |  |
Fixed income | — |  |  | 19.5 |  |  | — |  |  | 19.5 |
Equities | — |  |  | 9.5 |  |  | — |  |  | 9.5 |
Real estate | — |  |  | 0.6 |  |  | — |  |  | 0.6 |
Total | $ | — |  |  | $ | 30.2 |  |  | $ | — |  |  | $ | 30.2 |
| September 30, 2014
(in millions) | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |
Cash equivalents | $ | — |  |  | $ | 1.0 |  |  | $ | — |  |  | $ | 1.0 |
Fixed income: |  |  |  |  |  |  |  |  |  |  |
Government and agencies | — |  |  | — |  |  | — |  |  | — |
Collective funds: |  |  |  |  |  |  |
Fixed income | — |  |  | 19.6 |  |  | — |  |  | 19.6 |
Equities | — |  |  | 10.0 |  |  | — |  |  | 10.0 |
Real estate | — |  |  | 0.6 |  |  | — |  |  | 0.6 |
Total | $ | — |  |  | $ | 31.2 |  |  | $ | — |  |  | $ | 31.2 |
Schedule of Expected Benefit Payments [Table Text Block] | The following benefit payments, which reflect expected future service, are expected to be paid:
(in millions) |
Year ending September 30, |
2016 | $ | 3.2 |
2017 | 2.9 |
2018 | 2.0 |
2019 | 1.9 |
2020 | 1.9 |
2021 - 2025 | 9.4 |
| $ | 21.3 |

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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