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Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Other Intangible Assets
Other intangible assets consist of the following (in millions):
 
Weighted Average Life (Years) 
 
December 31, 2019
 
December 31, 2018
 
 
Gross Amount
 
Accumulated Amortization
 
Gross Amount 
 
Accumulated Amortization
Customer relationships
22
 
$
181.3

 
$
(130.6
)
 
$
181.3

 
$
(120.1
)
Tradenames
11
 
26.8

 
(18.7
)
 
26.8

 
(16.4
)
Trade secrets
13
 
52.7

 
(43.4
)
 
52.7

 
(39.7
)
Patents
12
 
1.6

 
(1.6
)
 
1.6

 
(1.6
)
Royalty agreements
20
 
6.1

 
(3.0
)
 
6.1

 
(2.7
)
 
19
 
$
268.5

 
$
(197.3
)
 
$
268.5

 
$
(180.5
)
Schedule of Estimated Future Amortization Expense
As of December 31, 2019, the Company estimates that amortization of intangible assets for the next five years will be as follows (in millions):
Year
Amortization Amount
2020
$
14.0

2021
$
11.5

2022
$
9.5

2023
$
7.7

2024
$
6.5