Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes - Schedule of Reconciliation of U.S. Federal Statutory Income Tax Rate to Effective Income Tax Rate Pursuant to ASU 2023-09 (Detail)

v3.25.4
Income Taxes - Schedule of Reconciliation of U.S. Federal Statutory Income Tax Rate to Effective Income Tax Rate Pursuant to ASU 2023-09 (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
U.S. federal statutory tax rate $ 57.8 $ 35.6 $ 42.6
State taxes, net of federal benefit (0.8) [1] (2.2) (5.6)
Effect of cross-border tax laws      
Net foreign tested income, net of credits 6.1    
Foreign-derived intangible income 8.0    
Foreign tax credits (3.0)    
Tax credits      
Research and development tax credits (4.2) (4.9) (4.4)
Changes in valuation allowances (15.1) 28.8 (61.0)
Foreign Tax Effects      
Nondeductible stock compensation 15.5 6.5 5.2
Other 3.7    
Changes in unrecognized tax benefits (5.8) (13.8) (6.1)
Statutory tax rate difference   30.2 90.3
Other (0.8) (0.3) 2.9
Other Adjustments (0.8) (0.3) 2.9
Total $ 47.3 $ (84.9) $ 60.8
Percent      
U.S. federal statutory tax rate 21.00% 21.00% 21.00%
State taxes, net of federal benefit [1] (0.30%)    
Effect of cross-border tax laws      
Net foreign tested income, net of credits 2.20%    
Foreign-derived intangible income (2.90%)    
Foreign tax credits (1.10%)    
Tax credits      
Research and development tax credits (1.50%)    
Changes in valuation allowances (5.50%)    
Foreign Tax Effect      
Nondeductible stock compensation 5.60%    
Other 1.30%    
Changes in unrecognized tax benefits (2.10%)    
Other Adjustments (0.10%)    
Total 17.20%    
India [Member]      
Foreign Tax Effects      
Statutory tax rate difference $ 6.7    
Withholding taxes 22.4    
Other 1.3    
Other Adjustments $ 1.3    
Foreign Tax Effect      
Statutory tax rate difference 2.40%    
Withholding taxes 8.10%    
Other Adjustments 0.50%    
Luxembourg [Member]      
Effect of cross-border tax laws      
Other $ (2.7)    
Foreign Tax Effects      
Statutory tax rate difference 9.7    
Imputed interest $ (21.0)    
Effect of cross-border tax laws      
Other (1.00%)    
Foreign Tax Effect      
Statutory tax rate difference 3.50%    
Imputed interest (7.60%)    
Switzerland [Member]      
Tax credits      
Changes in valuation allowances $ (42.5)    
Cantonal taxes 2.1    
Foreign Tax Effects      
Statutory tax rate difference $ (7.4)    
Tax credits      
Changes in valuation allowances (15.50%)    
Cantonal taxes 0.80%    
Foreign Tax Effect      
Statutory tax rate difference (2.70%)    
Other foreign jurisdictions [Member]      
Foreign Tax Effects      
Statutory tax rate difference $ 19.0    
Other (1.7)    
Other Adjustments $ (1.7)    
Foreign Tax Effect      
Statutory tax rate difference 6.90%    
Other Adjustments (0.60%)    
[1] State taxes in California, New York, Alabama, and Minnesota made up the majority (greater than 50 percent) of the tax effect in this category.