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v3.20.2

Income Taxes - Deferred tax (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Deferred tax assets: |  |  |
Compensation and benefit accruals not currently deductible | $ 119.4 | $ 98.0 |
Net operating loss carryforwards | 173.2 | 132.6 |
Self-insurance reserves | 17.6 | 11.3 |
Research and experimentation and other tax credits | 112.9 | 138.5 |
Pension liability | 95.1 | 78.2 |
Accrued liabilities | 303.2 | 97.2 |
Capital loss carryforward | 104.8 |  |
Other | 26.0 | 14.8 |
Total deferred tax assets | 952.2 | 570.6 |
Deferred tax liabilities: |  |  |
Unearned revenue | (40.3) | (53.4) |
Depreciation and amortization | (106.7) | (76.3) |
Acquired intangible assets | (24.5) | (25.1) |
Investment in subsidiaries | (10.9) | (10.9) |
Right of use assets | (164.9) |  |
Contingent consideration | (33.6) |  |
Total deferred tax liabilities | (380.9) | (165.7) |
Valuation allowance | (217.5) | (120.6) |
Net deferred tax assets | 353.8 | 284.3 |
Income Taxes, additional disclosures |  |  |
Remaining gross tax asset exclusive of tax liabilities realized | 734.7 |  |
Change in valuation allowance | 96.9 |  |
Valuation allowance related to capital losses. | 71.2 |  |
Gross book-tax differences from non-U.S. subsidiaries | 1,500.0 |  |
Liability for unrecognized tax benefits, including potential interest and penalties, net of related tax benefit | 65.8 | 70.1 |
Unrecognized tax benefits | 47.1 | 55.7 | $ 53.8
Unrecognized tax benefits that would be included in the effective tax rate if recognized | 29.5 |  |
Capital loss carryforwards | 355.7 |  |
Canada |  |  |
Deferred tax liabilities: |  |  |
Valuation allowance | (31.7) |  |
Income Taxes, additional disclosures |  |  |
Change in valuation allowance | 31.7 |  |
Foreign net operating loss carryforwards | 1.5 |  |
United States |  |  |
Deferred tax liabilities: |  |  |
Valuation allowance |  |  | $ (38.1)
California Franchise Tax Board | Enterprise Zone Tax Credits |  |  |
Income Taxes, additional disclosures |  |  |
Unused tax credits | 14.5 |  |
Federal |  |  |
Income Taxes, additional disclosures |  |  |
Liability for unrecognized tax benefits, including potential interest and penalties, net of related tax benefit | 47.1 | 55.7 |
Federal | Research and development |  |  |
Income Taxes, additional disclosures |  |  |
Unused tax credits | 71.2 |  |
State |  |  |
Income Taxes, additional disclosures |  |  |
Net operating loss carryforwards | 710.2 |  |
State | Research and development |  |  |
Income Taxes, additional disclosures |  |  |
Unused tax credits | $ 27.2 |  |
Foreign |  |  |
Income Taxes, additional disclosures |  |  |
Net operating loss carryforwards |  | $ 505.3 |

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