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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2024
Income Taxes [Abstract]  
Income From Continuing Operations Before Income Taxes
Income before income taxes is categorized geographically as follows:
Year Ended December 31,
202420232022
(In millions)
United States$655.4 $607.1 $558.5 
Foreign366.5 369.4 321.7 
Total income before income taxes$1,021.9 $976.5 $880.2 
Components Of Provision For Income Taxes
The provision for income taxes consisted of the following:
Year Ended December 31,
202420232022
(In millions)
Current expense:
Federal$147.9 $159.1 $145.1 
State 31.3 28.0 41.7 
Foreign, including withholding tax43.3 24.4 26.3 
222.5 211.5 213.1 
Deferred expense (benefit):
Federal (3.3)(25.6)(18.0)
State(3.3)11.2 (4.8)
Foreign20.3 (38.2)16.1 
13.7 (52.6)(6.7)
Total income tax expense
$236.2 $158.9 $206.4 
Reconciliation Of Income Tax At Effective Income Tax Rate
The difference between income tax expense and the amount resulting from applying the federal statutory rate of 21% to Income before income taxes is attributable to the following:
Year Ended December 31,
202420232022
(In millions)
Income tax expense at federal statutory rate$214.6 $205.1 $184.8 
State taxes, net of federal benefit20.4 28.5 29.2 
Change in valuation allowance(6.5)66.1 0.1 
Remeasurement of unrecognized tax benefits2.4 (8.3)(1.5)
Effect of non-U.S. operations2.3 (15.5)(9.5)
Non-U.S. intellectual property— (118.0)— 
Other3.0 1.0 3.3 
Total income tax expense
$236.2 $158.9 $206.4 
Summary Of Deferred Tax Assets And Liabilities
The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities are as follows:
As of December 31,
20242023
(In millions)
Deferred tax assets:
Intellectual property$227.4 $266.2 
Deferred revenue, accruals and reserves72.4 72.9 
Research and development costs32.5 23.6 
Tax credit carryforwards6.1 4.6 
Net operating loss carryforwards1.7 2.2 
Other3.9 6.0 
Total deferred tax assets344.0 375.5 
Valuation allowance(61.8)(73.6)
Net deferred tax assets282.2 301.9 
Deferred tax liabilities
(0.9)(0.9)
Total net deferred tax assets$281.3 $301.0 
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:
As of December 31,
20242023
(In millions)
Beginning balance$9.6 $15.1 
Increases in tax positions for prior years0.3 0.1 
Decreases in tax positions for prior years(2.8)— 
Increases in tax positions for current year0.4 5.0 
Lapse in statute of limitations(1.0)(10.6)
Ending balance$6.5 $9.6