Other Assets (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,085.9	$ 1,007.7
Accumulated Amortization	(637.3)	(505.4)
Net Carrying Amount	448.6	502.3
Amortization expense on capitalized software	(27.2)	(30.6)	$ (33.7)
Impairment of assets	(7.5)	(30.2)	(180.2)
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	97.3
Finite-Lived Intangible Assets, Amortization Expense, Year Two	96.4
Finite-Lived Intangible Assets, Amortization Expense, Year Three	86.9
Finite-Lived Intangible Assets, Amortization Expense, Year Four	81.7
Finite-Lived Intangible Assets, Amortization Expense, Year Five	64.0
Finite-Lived Intangible Assets, Net	426.3
Payments to Develop Software	$ (17.2)	(23.1)	(29.8)
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 2 months 12 days
Gross Carrying Amount	$ 762.0	698.7
Accumulated Amortization	(354.1)	(251.0)
Net Carrying Amount	$ 407.9	447.7
Software and Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years 6 months
Gross Carrying Amount	$ 198.0	178.2
Accumulated Amortization	(160.0)	(132.2)
Net Carrying Amount	38.0	46.0	70.7	$ 93.1
Impairment of assets	0.0	(15.0)	0.0
Transfer To Held For Sale	0.0	0.0	(14.4)
Finite-Lived Intangible Assets, Translation and Purchase Accounting Adjustments	$ 2.0	(2.2)	$ (4.1)
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Gross Carrying Amount	$ 56.1	51.5
Accumulated Amortization	(55.8)	(47.5)
Net Carrying Amount	$ 0.3	4.0
Other Intangible Assets, Net [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 6 months
Gross Carrying Amount	$ 69.8	79.3
Accumulated Amortization	(67.4)	(74.7)
Net Carrying Amount	2.4	4.6
Other intangible asset, net [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	323.9	309.0
Accumulated Amortization	(283.2)	(254.4)
Net Carrying Amount	$ 40.7	$ 54.6

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