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Intangible Assets (Tables)
3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Amortized Intangible Assets
The gross carrying amount and accumulated amortization for intangible assets which are in our AMS segment consisted of the following ($ in millions):
 March 31, 2021
 Gross
Carrying
Amount
Accumulated
Amortization
Accumulated ImpairmentsAccumulated Foreign ExchangeNet
Carrying
Amount
Amortized Intangible Assets
Customer relationships$339.2 $94.1 $— $(1.1)$246.2 
Developed technology42.0 14.9 — 0.1 27.0 
Trade names32.7 1.6 20.7 0.3 10.1 
Non-compete agreements2.9 2.4 — — 0.5 
Patents1.5 0.6 — — 0.9 
Total$418.3 $113.6 $20.7 $(0.7)$284.7 
Unamortized Intangible Assets
Trade names
$20.0 $— $0.1 $(0.2)$20.1 

 December 31, 2020
 Gross
Carrying
Amount
Accumulated
Amortization
Accumulated ImpairmentsAccumulated Foreign ExchangeNet
Carrying
Amount
Amortized Intangible Assets
Customer relationships
$339.8 $88.5 $— $(2.9)$254.2 
Developed technology42.1 14.1 — (0.2)28.2 
Trade names32.7 1.4 20.7 0.3 10.3 
Non-compete agreements2.9 2.4 — — 0.5 
Patents1.5 0.5 — — 1.0 
Total$419.0 $106.9 $20.7 $(2.8)$294.2 
Unamortized Intangible Assets
Trade names
$20.0 $— $0.1 $(0.6)$20.5 
Schedule of Unamortized Intangible Assets
The gross carrying amount and accumulated amortization for intangible assets which are in our AMS segment consisted of the following ($ in millions):
 March 31, 2021
 Gross
Carrying
Amount
Accumulated
Amortization
Accumulated ImpairmentsAccumulated Foreign ExchangeNet
Carrying
Amount
Amortized Intangible Assets
Customer relationships$339.2 $94.1 $— $(1.1)$246.2 
Developed technology42.0 14.9 — 0.1 27.0 
Trade names32.7 1.6 20.7 0.3 10.1 
Non-compete agreements2.9 2.4 — — 0.5 
Patents1.5 0.6 — — 0.9 
Total$418.3 $113.6 $20.7 $(0.7)$284.7 
Unamortized Intangible Assets
Trade names
$20.0 $— $0.1 $(0.2)$20.1 

 December 31, 2020
 Gross
Carrying
Amount
Accumulated
Amortization
Accumulated ImpairmentsAccumulated Foreign ExchangeNet
Carrying
Amount
Amortized Intangible Assets
Customer relationships
$339.8 $88.5 $— $(2.9)$254.2 
Developed technology42.1 14.1 — (0.2)28.2 
Trade names32.7 1.4 20.7 0.3 10.3 
Non-compete agreements2.9 2.4 — — 0.5 
Patents1.5 0.5 — — 1.0 
Total$419.0 $106.9 $20.7 $(2.8)$294.2 
Unamortized Intangible Assets
Trade names
$20.0 $— $0.1 $(0.6)$20.5