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Goodwill and Intangible Assets
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill
The following table represents the changes in goodwill by segment:
Cryo Tank SolutionsHeat Transfer SystemsSpecialty ProductsRepair, Service & LeasingConsolidated
Balance at December 31, 2023$219.3 $480.4 $567.9 $1,639.2 $2,906.8 
Purchase accounting adjustments (1)
2.6 1.3 10.9 27.8 42.6 
Foreign currency translation adjustments and other0.7 (0.5)0.6 37.5 38.3 
Balance at September 30, 2024$222.6 $481.2 $579.4 $1,704.5 $2,987.7 
Accumulated goodwill impairment loss at December 31, 2023
$23.5 $49.3 $35.8 $20.4 $129.0 
Accumulated goodwill impairment loss at September 30, 2024
$23.5 $49.3 $35.8 $20.4 $129.0 
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(1)Purchase accounting adjustments, which were recorded during the first quarter 2024, related to the Howden Acquisition. See Note 13, “Business Combinations” for further information.
Intangible Assets
The following table displays the gross carrying amount and accumulated amortization for finite-lived intangible assets and indefinite-lived intangible assets (exclusive of goodwill) (1):
 September 30, 2024December 31, 2023
 Estimated Useful LivesGross
Carrying
Amount		Accumulated
Amortization		Gross
Carrying
Amount		Accumulated
Amortization
Finite-lived intangible assets:
Customer relationships
4 to 18 years
$1,847.6 $(267.1)$1,836.4 $(185.2)
Technology
5 to 18 years
493.2 (104.6)496.7 (78.8)
Patents, backlog and other
2 to 10 years
140.3 (69.6)138.6 (35.6)
Trademarks and trade names
5 to 23 years
3.3 (1.9)3.3 (1.9)
Land use rights50 years10.3 (2.1)10.2 (1.9)
Total finite-lived intangible assets2,494.7 (445.3)2,485.2 (303.4)
Indefinite-lived intangible assets:
Trademarks and trade names (2)
611.0 — 610.1 — 
Total intangible assets$3,105.7 $(445.3)$3,095.3 $(303.4)
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(1)Amounts include the impact of foreign currency translation. Fully amortized or impaired amounts are written off.
(2)Accumulated indefinite-lived intangible assets impairment loss was $16.0 at both September 30, 2024 and December 31, 2023.
Amortization expense for intangible assets subject to amortization was $48.4 and $49.0 for the three months ended September 30, 2024 and 2023, respectively, and $143.9 and $115.0 for the nine months ended September 30, 2024 and 2023, respectively.