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Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Deferred tax assets: |  |
Compensation and benefit accruals not currently deductible | $ 74.7 | $ 77.6
Net operating loss carry forwards | 58.1 | 57.0
Self insurance reserves | 54.7 | 50.2
Research and experimentation and other tax credits | 38.3 | 42.4
Pension liability | 58.5 | 58.7
Accrued liabilities | 56.1 | 86.5
Investments in joint ventures/non-controlled subsidiaries | 13.9 |
State taxes | 0.9 |
Other | 4.2 | 4.0
Total deferred tax assets | 359.4 | 376.4
Deferred tax liabilities: |  |
Unearned revenue | (139.3) | (167.8)
Depreciation and amortization | (20.1) | (18.8)
Acquired intangible assets | (15.8) | (21.4)
State taxes |  | (3.8)
Investments in joint ventures/non-controlled subsidiaries |  | (1.6)
Total deferred tax liabilities | (175.2) | (213.4)
Valuation allowance | (20.8) | (19.2)
Net deferred tax assets | 163.4 | 143.8
Net operating loss carry forwards |  |
Tax-deductible goodwill | 283.9 | 306.6
Income Taxes, additional disclosures |  |
Unused Foreign tax credits | 16.8 |
Unused federal research and development credits | 1.8 |
Unused state research and development credits which can be carried forward indefinitely | 15.7 |
California Enterprise Zone Tax Credits which can be carried forward indefinitely | 4.1 |
Net deferred tax asset likely to be realized and for which no additional valuation allowance has been provided | 338.6 |
Additional valuation allowance provided for, net deferred tax asset which is likely to be realized | 53.7 |
Undistributed earnings from non-U.S. subsidiaries | 852.2 |
Liability for unrecognized tax benefits, including potential interest and penalties, net of related tax benefit | 60.2 | 56.3
Unrecognized tax benefits that would be included in the effective tax rate if recognized | 33.5 |
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits |  |
Balance at the beginning of the year | 55.8 | 58.1
Gross increase in prior years' tax positions | 7.2 | 3.7
Gross decrease in prior years' tax positions | (5.6) | (4.4)
Decrease due to settlement with tax authorities | (1.6) | (5.2)
Gross increase in current periods tax positions | 3.8 | 4.9
Lapse of statute of limitations | (5.9) | (1.3)
Balance at the end of the year | 53.7 | 55.8
Accrued interest, excluding any related income tax benefits | 7.3 | 9.6
Accrued penalties, excluding any related income tax benefits | 2.7 | 0.1
Maximum |  |
Net operating loss carry forwards |  |
Period of amortization of goodwill | P15Y |
State |  |
Net operating loss carry forwards |  |
Net operating loss carry forwards | 255.6 |
Foreign |  |
Net operating loss carry forwards |  |
Net operating loss carry forwards | $ 216.7 |

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