Goodwill and Other Assets Schedule of Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,022.1		$ 1,034.0
Accumulated amortization	(697.9)		(686.5)
Intangible assets, net	324.2		347.5
Payments to Develop Software	7.6	$ 5.9
Amortization of internally-developed software	$ (5.3)	(6.0)
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 10 months 24 days
Gross carrying amount	$ 689.3		703.3
Accumulated amortization	(412.0)		(401.6)
Intangible assets, net	$ 277.3		301.7
Internally-developed software [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year 9 months 18 days
Gross carrying amount	$ 232.0		228.1
Accumulated amortization	(187.4)		(184.9)
Intangible assets, net	44.6	37.8	43.2	$ 38.0
Transfer To Held For Sale	$ (0.9)	$ (0.1)
Development costs non-software [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year
Gross carrying amount	$ 50.7		51.8
Accumulated amortization	(50.6)		(51.6)
Intangible assets, net	$ 0.1		0.2
Other intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 7 months 6 days
Gross carrying amount	$ 50.1		50.8
Accumulated amortization	(47.9)		(48.4)
Intangible assets, net	2.2		2.4
Other intangible asset, net [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	332.8		330.7
Accumulated amortization	(285.9)		(284.9)
Intangible assets, net	46.9		$ 45.8
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 277.3