Goodwill And Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 1,477.8	$ 1,392.7
Accumulated Amortization	(689.9)	(552.7)
Net Book Value	787.9	840.0
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	984.3	959.1
Accumulated Amortization	(435.4)	(351.4)
Net Book Value	548.9	607.7
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	400.0	380.5
Accumulated Amortization	(241.5)	(194.8)
Net Book Value	158.5	185.7
Trade names
Finite-Lived Intangible Assets
Gross Carrying Amount	91.8	51.5
Accumulated Amortization	(11.3)	(4.9)
Net Book Value	80.5	46.6
Other
Finite-Lived Intangible Assets
Gross Carrying Amount	1.7	1.6
Accumulated Amortization	(1.7)	(1.6)
Net Book Value	$ 0.0	$ 0.0