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Goodwill
 6 Months Ended
Jun. 30, 2023
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, 2022$4,236.1 $1,136.5 $5,372.6 
Goodwill acquired from 2023 acquisitions— 23.5 23.5 
Purchase price allocation adjustments and other25.4 — 25.4 
Foreign currency translation adjustments16.9 11.2 28.1 
Balance at June 30, 2023$4,278.4 $1,171.2 $5,449.6