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Income Taxes , Narrative and Deferred Tax Assets (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
General business credit carryforward | $ 63.5 | $ 48.9
Deferred revenue | 276.5 | 216.4
Reserves and accruals | 59.5 | 41.9
Net operating loss carryforward | 22.2 | 23.4
Stock-based compensation expense | 18.3 | 17.5
Depreciation and amortization | 17.0 | 6.3
Capitalized research expenditures | 64.2 | 16.6
Operating lease liabilities | 13.1 | 11.6
Total deferred tax assets | 534.3 | 382.6
Less: Valuation allowance | (75.0) | (54.9)
Deferred tax assets, net of valuation allowance | 459.3 | 327.7
Deferred tax liabilities: |  |
Deferred contract costs | (97.4) | (74.0)
Operating lease ROU assets | (11.9) | (10.8)
Acquired intangibles | (15.7) | (5.7)
Total deferred tax liabilities | (125.0) | (90.5)
Net deferred tax assets | 334.3 | 237.2
Deferred tax asset recorded | 342.3 | $ 245.2
Federal [Member] |  |
Deferred tax liabilities: |  |
Net operating loss carryforwards | 78.4 |
State and Local Jurisdiction [Member] |  |
Deferred tax liabilities: |  |
Tax credit carryforwards | 41.0 |
California [Member] |  |
Deferred tax liabilities: |  |
Net operating loss carryforwards | 20.8 |
Income Tax Liabilities |  |
Deferred tax liabilities: |  |
Deferred tax liability recorded | $ 7.9 |

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