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Goodwill and Intangible Assets - Summary of Intangible Assets, Net (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 1,535.0	$ 1,538.7
Accumulated Amortization	(1,005.2)	(886.2)
Accumulated Impairment Losses	(60.8)	(62.0)
Carrying Value	469.0	590.5
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Original Cost	581.5	585.2
Accumulated Amortization	(411.7)	(386.8)
Accumulated Impairment Losses	(17.6)	(20.1)
Carrying Value	152.2	178.3
Developed technology
Finite-Lived Intangible Assets [Line Items]
Original Cost	794.7	779.5
Accumulated Amortization	(532.9)	(440.3)
Accumulated Impairment Losses	(2.6)	(2.6)
Carrying Value	259.2	336.6
IPRD
Finite-Lived Intangible Assets [Line Items]
Original Cost	49.5	64.7
Accumulated Amortization	0.0	0.0
Accumulated Impairment Losses	(25.4)	(24.1)
Carrying Value	24.1	40.6
Licenses
Finite-Lived Intangible Assets [Line Items]
Original Cost	30.0	30.0
Accumulated Amortization	0.0	0.0
Accumulated Impairment Losses	0.0	0.0
Carrying Value	30.0	30.0
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Original Cost	79.3	79.3
Accumulated Amortization	(60.6)	(59.1)
Accumulated Impairment Losses	(15.2)	(15.2)
Carrying Value	$ 3.5	$ 5.0

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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