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Goodwill and Intangible Assets - Summary of Intangible Assets, Net (Details) - USD ($) $ in Millions | Sep. 28, 2018 | Dec. 31, 2017
--- | --- | ---
Intangible Assets, Net |  |
Original Cost | $ 1,398.7 | $ 1,347.8
Accumulated Amortization | (745.9) | (662.6)
Accumulated Impairment Losses | (56.9) | (56.9)
Carrying Value | 595.9 | 628.3
Customer relationships |  |
Intangible Assets, Net |  |
Original Cost | 556.7 | 555.9
Accumulated Amortization | (351.4) | (328.5)
Accumulated Impairment Losses | (20.1) | (20.1)
Carrying Value | 185.2 | 207.3
Developed technology |  |
Intangible Assets, Net |  |
Original Cost | 698.0 | 657.6
Accumulated Amortization | (336.4) | (278.2)
Accumulated Impairment Losses | (2.6) | (2.6)
Carrying Value | 359.0 | 376.8
IPRD |  |
Intangible Assets, Net |  |
Original Cost | 64.1 | 54.5
Accumulated Amortization | 0.0 | 0.0
Accumulated Impairment Losses | (19.0) | (19.0)
Carrying Value | 45.1 | 35.5
Other intangibles |  |
Intangible Assets, Net |  |
Original Cost | 79.9 | 79.8
Accumulated Amortization | (58.1) | (55.9)
Accumulated Impairment Losses | (15.2) | (15.2)
Carrying Value | $ 6.6 | $ 8.7

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