Other Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,034.0	$ 1,085.9
Accumulated Amortization	(686.5)	(637.3)
Net Carrying Amount	347.5	448.6
Amortization expense on capitalized software	(23.3)	(27.2)	$ (30.6)
Loss (gain) on sale of assets, net	(1.3)	(7.5)	(30.2)
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	96.8
Finite-Lived Intangible Assets, Amortization Expense, Year Two	93.0
Finite-Lived Intangible Assets, Amortization Expense, Year Three	77.8
Finite-Lived Intangible Assets, Amortization Expense, Year Four	59.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	21.0
Finite-Lived Intangible Assets, Net	347.7
Payments to Develop Software	$ (31.1)	(17.2)	(23.1)
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years 2 months 12 days
Gross Carrying Amount	$ 703.3	762.0
Accumulated Amortization	(401.6)	(354.1)
Net Carrying Amount	$ 301.7	407.9
Software and Software Development Costs [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	$ 228.1	198.0
Accumulated Amortization	(184.9)	(160.0)
Net Carrying Amount	43.2	38.0	46.0	$ 70.7
Loss (gain) on sale of assets, net	0.0	0.0	(15.0)
Finite-Lived Intangible Assets, Translation and Purchase Accounting Adjustments	$ (2.6)	2.0	$ (2.2)
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year 3 months 18 days
Gross Carrying Amount	$ 51.8	56.1
Accumulated Amortization	(51.6)	(55.8)
Net Carrying Amount	$ 0.2	0.3
Other Intangible Assets, Net [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 9 months 18 days
Gross Carrying Amount	$ 50.8	69.8
Accumulated Amortization	(48.4)	(67.4)
Net Carrying Amount	2.4	2.4
Other intangible asset, net [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	330.7	323.9
Accumulated Amortization	(284.9)	(283.2)
Net Carrying Amount	$ 45.8	$ 40.7