Goodwill and Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 1,469.5	$ 1,477.8
Accumulated Amortization	(713.7)	(689.9)
Net Book Value	755.8	787.9
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	1,003.6	984.3
Accumulated Amortization	(472.1)	(435.4)
Net Book Value	531.5	548.9
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	373.7	400.0
Accumulated Amortization	(227.5)	(241.5)
Net Book Value	146.2	158.5
Trade names
Finite-Lived Intangible Assets
Gross Carrying Amount	92.2	91.8
Accumulated Amortization	(14.1)	(11.3)
Net Book Value	78.1	80.5
Other
Finite-Lived Intangible Assets
Gross Carrying Amount	0.0	1.7
Accumulated Amortization	0.0	(1.7)
Net Book Value	$ 0.0	$ 0.0