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Pension Plans (Details 3) (Pension Plans., USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Post-retirement plan |  |
Fair values of plan assets | $ 609.7 | $ 574.7
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 609.7 | 574.7
Cash and cash equivalents |  |
Post-retirement plan |  |
Fair values of plan assets | 11.0 | 4.6
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 11.0 | 4.6
Diversified funds |  |
Post-retirement plan |  |
Fair values of plan assets | 108.6 | 77.9
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 108.6 | 77.9
Equity funds |  |
Post-retirement plan |  |
Fair values of plan assets | 192.4 | 181.9
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 192.4 | 181.9
Fixed income funds |  |
Post-retirement plan |  |
Fair values of plan assets | 220.6 | 226.8
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 220.6 | 226.8
Hedge funds |  |
Post-retirement plan |  |
Fair values of plan assets | 25.0 | 40.5
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 25.0 | 40.5
Assets held by insurance company |  |
Post-retirement plan |  |
Fair values of plan assets | 46.1 | 37.5
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 46.1 | 37.5
Real estate |  |
Post-retirement plan |  |
Fair values of plan assets | 6.0 | 5.5
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 6.0 | 5.5
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Post-retirement plan |  |
Fair values of plan assets | 11.0 | 4.6
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 11.0 | 4.6
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents |  |
Post-retirement plan |  |
Fair values of plan assets | 11.0 | 4.6
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 11.0 | 4.6
Quoted Prices in Active Markets for Similar Assets (Level 2) |  |
Post-retirement plan |  |
Fair values of plan assets | 586.1 | 559.5
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 586.1 | 559.5
Quoted Prices in Active Markets for Similar Assets (Level 2) | Diversified funds |  |
Post-retirement plan |  |
Fair values of plan assets | 108.6 | 77.9
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 108.6 | 77.9
Quoted Prices in Active Markets for Similar Assets (Level 2) | Equity funds |  |
Post-retirement plan |  |
Fair values of plan assets | 192.4 | 181.9
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 192.4 | 181.9
Quoted Prices in Active Markets for Similar Assets (Level 2) | Fixed income funds |  |
Post-retirement plan |  |
Fair values of plan assets | 220.6 | 226.8
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 220.6 | 226.8
Quoted Prices in Active Markets for Similar Assets (Level 2) | Hedge funds |  |
Post-retirement plan |  |
Fair values of plan assets | 12.4 | 29.9
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 12.4 | 29.9
Quoted Prices in Active Markets for Similar Assets (Level 2) | Assets held by insurance company |  |
Post-retirement plan |  |
Fair values of plan assets | 46.1 | 37.5
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 46.1 | 37.5
Quoted Prices in Active Markets for Similar Assets (Level 2) | Real estate |  |
Post-retirement plan |  |
Fair values of plan assets | 6.0 | 5.5
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at end of year | 6.0 | 5.5
Significant Unobservable Inputs (Level 3) |  |
Post-retirement plan |  |
Fair values of plan assets | 12.6 | 10.6
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at beginning of year | 10.6 | 10.0
Actual return on plan assets, relating to assets still held at reporting date | 2.0 | 0.9
Purchases, sales and settlements |  | (0.3)
Fair value of plan assets at end of year | 12.6 | 10.6
Significant Unobservable Inputs (Level 3) | Hedge funds |  |
Post-retirement plan |  |
Fair values of plan assets | 12.6 | 10.6
Changes in the fair value of Level 3 assets |  |
Fair value of plan assets at beginning of year | 10.6 | 10.0
Actual return on plan assets, relating to assets still held at reporting date | 2.0 | 0.9
Purchases, sales and settlements |  | (0.3)
Fair value of plan assets at end of year | $ 12.6 | $ 10.6

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- Definition Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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=21915506&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Purchases, sales, and settlements of plan assets that occurred during the period. + 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)(iv)(02)(B) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(02)(B) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(ii) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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