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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME        
Net income $ 2,054.7 $ 1,255.1 $ 4,782.2 $ 3,100.1
Total other comprehensive income, net of tax:        
Foreign currency translation adjustments 26.9 (12.3) 99.7 234.8
Unrealized loss on hedging activities, net of tax of ($7.9) and ($7.9) for 2025, respectively   (25.9)   (25.9)
Reclassification of net unrealized loss on hedging activities to interest expense, net of tax of ($0.3) and ($1.0) for 2026, respectively 1.1 0.0 3.2 0.0
Pension and postretirement benefit plan adjustment, net of tax of ($0.4) and ($1.3) for 2026, and ($0.3) and ($0.8) for 2025, respectively 1.4 0.8 4.1 2.4
Total other comprehensive income, net of tax 29.4 (37.4) 107.0 211.3
Total comprehensive income 2,084.1 1,217.7 4,889.2 3,311.4
Less: Comprehensive income attributable to noncontrolling interests (21.3) (9.8) (48.9) (28.0)
Comprehensive income attributable to Amphenol Corporation $ 2,062.8 $ 1,207.9 $ 4,840.3 $ 3,283.4