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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Intangible Assets [Line Items]
Gross Carrying Amount, amortizable	$ 617.4	$ 825.9
Accumulated Amortization	(202.6)	(254.2)
Net, amortizable	414.8	571.7
Non-amortizable		4.8
Gross Carrying Amount, total	617.4	830.7
Net, total	414.8	576.5
Purchased licenses and technologies
Intangible Assets [Line Items]
Gross Carrying Amount, amortizable	617.4	818.2
Accumulated Amortization	(202.6)	(248.2)
Net, amortizable	$ 414.8	570.0
Customer relationships
Intangible Assets [Line Items]
Gross Carrying Amount, amortizable		4.7
Accumulated Amortization		(4.5)
Net, amortizable		0.2
Trademarks
Intangible Assets [Line Items]
Gross Carrying Amount, amortizable		3.0
Accumulated Amortization		(1.5)
Net, amortizable		1.5
In-process research and development
Intangible Assets [Line Items]
Non-amortizable		$ 4.8

X

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

+ References

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

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