Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Assets subject to amortization, accumulated amortization	$ (2,207.4)	$ (1,752.6)
Intangible assets, cost	9,414.3	6,420.3
Intangible assets, net book value	7,206.9	4,667.7
Trade names
Finite-Lived Intangible Assets [Line Items]
Assets not subject to amortization	784.1	659.8
Customer related intangibles
Finite-Lived Intangible Assets [Line Items]
Assets subject to amortization, cost	7,494.7	4,955.4
Assets subject to amortization, accumulated amortization	(1,703.8)	(1,349.4)
Assets subject to amortization, net book value	5,790.9	3,606.0
Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Assets subject to amortization, cost	942.8	613.0
Assets subject to amortization, accumulated amortization	(363.9)	(279.6)
Assets subject to amortization, net book value	578.9	333.4
Software
Finite-Lived Intangible Assets [Line Items]
Assets subject to amortization, cost	172.4	172.2
Assets subject to amortization, accumulated amortization	(127.4)	(111.5)
Assets subject to amortization, net book value	45.0	60.7
Patents and other protective rights
Finite-Lived Intangible Assets [Line Items]
Assets subject to amortization, cost	13.0	12.0
Assets subject to amortization, accumulated amortization	(6.7)	(8.0)
Assets subject to amortization, net book value	6.3	4.0
Trade names
Finite-Lived Intangible Assets [Line Items]
Assets subject to amortization, cost	7.3	7.9
Assets subject to amortization, accumulated amortization	(5.6)	(4.1)
Assets subject to amortization, net book value	$ 1.7	$ 3.8

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

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