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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in the Carrying Amount of Goodwill for Each Reporting Segment
The changes in the carrying amount of goodwill for each reporting segment were as follows (in millions):

 ATMFBSTotal
Balance at December 31, 2021
$643.4 $1.6 $645.0 
Goodwill acquired(1)
215.8 — 215.8 
Foreign currency translation and other(2)
(16.6)— (16.6)
Balance at December 31, 2022
$842.6 $1.6 $844.2 
Goodwill acquired(3)
16.0 — 16.0 
Goodwill impairment(4)
(401.0)— (401.0)
Foreign currency translation and other
14.9 — 14.9 
Balance at December 31, 2023
$472.5 $1.6 $474.1 
(1) $214.4 million related to the Merger and $1.4 million related to measurement period adjustments for the Scapa acquisition.
(2) During the first quarter of 2022, goodwill with a carrying amount of $2.1 million was allocated to the disposal group classified as held for sale and subsequently impaired. Goodwill was allocated to the disposal group on the basis of relative fair value, primarily utilizing Level 3 inputs which included forecasted future cash flows.
(3) Related to the measurement period adjustments for the Merger.
(4) Recorded in the third quarter of 2023.