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Goodwill and Other Intangible Assets - Gross carrying amount and accumulated amortization of the company's intangible assets other than goodwill (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Intangible asset balances by major asset class |  |
Accumulated Amortization Amount | $ (45.3) | $ (43.3)
Gross Carrying Amount | 159.4 | 162.6
Net Book Value | 114.1 | 119.3
Customer relationships |  |
Intangible asset balances by major asset class |  |
Gross Carrying Amount | 10.3 | 10.4
Accumulated Amortization Amount | (7.8) | (7.1)
Net Book Value | 2.5 | 3.3
Patents |  |
Intangible asset balances by major asset class |  |
Gross Carrying Amount | 28.5 | 29.1
Accumulated Amortization Amount | (27.4) | (26.6)
Net Book Value | 1.1 | 2.5
Developed Technology Rights |  |
Intangible asset balances by major asset class |  |
Gross Carrying Amount | 10.0 | 10.2
Accumulated Amortization Amount | (9.9) | (9.3)
Net Book Value | 0.1 | 0.9
Other intangibles |  |
Intangible asset balances by major asset class |  |
Gross Carrying Amount | 0.2 | 0.3
Accumulated Amortization Amount | (0.2) | (0.3)
Net Book Value | 0.0 | 0.0
Trademarks and tradenames |  |
Intangible asset balances by major asset class |  |
Gross Carrying Amount | 92.4 | 94.2
Distribution network |  |
Intangible asset balances by major asset class |  |
Gross Carrying Amount | $ 18.0 | $ 18.4

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