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Goodwill and Other Intangible Assets - Changes in Carrying Amounts of Goodwill by Segment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 5,372,562 $ 5,238,700
Goodwill acquired 1,011,700 197,800
Purchase price allocation adjustments and other 24,800 1,800
Foreign currency translation adjustments 38,500 (65,700)
Goodwill, ending balance 6,447,629 5,372,562
EIG    
Goodwill [Roll Forward]    
Goodwill, beginning balance 4,236,100 4,073,800
Goodwill acquired 79,300 197,800
Purchase price allocation adjustments and other 24,800 1,800
Foreign currency translation adjustments 24,800 (37,300)
Goodwill, ending balance 4,365,000 4,236,100
EMG    
Goodwill [Roll Forward]    
Goodwill, beginning balance 1,136,500 1,164,900
Goodwill acquired 932,400 0
Purchase price allocation adjustments and other 0 0
Foreign currency translation adjustments 13,700 (28,400)
Goodwill, ending balance $ 2,082,600 $ 1,136,500