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Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2011
Income Taxes, additional disclosures |  |  |
Unused state research and development credits which can be carried forward indefinitely | $ 17.5 |  |
California Enterprise Zone Tax Credits which can be carried forward indefinitely | 4.6 |  |
Net deferred tax asset likely to be realized and for which no additional valuation allowance has been provided | 340.0 |  |
Additional valuation allowance provided for, net deferred tax asset which is likely to be realized | 47.5 |  |
Undistributed earnings from non-U.S. subsidiaries | 976.7 |  |
Liability for unrecognized tax benefits, including potential interest and penalties, net of related tax benefit | 52.6 | 60.2 |
Unrecognized tax benefits that would be included in the effective tax rate if recognized | 28.6 |  |
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits |  |  |
Balance at the beginning of the year | 53.7 |  | 55.8
Gross increase in prior years' tax positions | 3.3 | 7.2 |
Gross decrease in prior years' tax positions | (7.6) | (5.6) |
Decrease due to settlement with tax authorities | (2.0) | (1.6) |
Gross increase in current periods tax positions | 2.2 | 3.8 |
Lapse of statute of limitations | (2.1) | (5.9) |
Balance at the end of the year | 47.5 | 53.7 | 55.8
Deferred tax assets: |  |  |
Compensation and benefit accruals not currently deductible | 65.5 | 74.7 |
Net operating loss carry forwards | 69.3 | 58.1 |
Self insurance reserves | 48.8 | 54.7 |
Research and experimentation and other tax credits | 34.2 | 38.3 |
Pension liability | 59.4 | 58.5 |
Accrued liabilities | 63.7 | 56.1 |
Investments in joint ventures/non-controlled subsidiaries | 20.7 | 13.9 |
State taxes | 1.5 | 0.9 |
Other | 4.0 | 4.2 |
Total deferred tax assets | 367.1 | 359.4 |
Deferred tax liabilities: |  |  |
Unearned revenue | (122.9) | (139.3) |
Depreciation and amortization | (59.2) | (20.1) |
Acquired intangible assets | (14.8) | (15.8) |
Total deferred tax liabilities | (196.9) | (175.2) |
Valuation allowance | (27.1) | (20.8) |
Net deferred tax assets | 143.1 | 163.4 |
Accrued penalties, excluding any related income tax benefits | 2.9 | 2.7 |
Accrued interest, excluding any related income tax benefits | 6.2 | 7.3 |
Tax-deductible goodwill | 251.6 | 283.9 |
Maximum |  |  |
Deferred tax liabilities: |  |  |
Period of amortization of goodwill | 15 years |  |
State and Local Jurisdiction [Member] |  |  |
Deferred tax liabilities: |  |  |
Net operating loss carry forwards | 230.6 |  |
Foreign Tax Authority [Member] |  |  |
Deferred tax liabilities: |  |  |
Net operating loss carry forwards | $ 260.2 |  |

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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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