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Goodwill
 3 Months Ended
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
The changes in the carrying amounts of goodwill by segment were as follows:
EIGEMGTotal
(In millions)
Balance at December 31, 2023$4,365.0 $2,082.6 $6,447.6 
Purchase price allocation adjustments and other11.8 0.6 12.4 
Foreign currency translation adjustments(16.0)(5.3)(21.3)
Balance at March 31, 2024$4,360.8 $2,077.9 $6,438.7