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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