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Goodwill and Intangible Assets - Schedule of Acquired Finite Lived Intangible Assets by Major Class (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,113.5	$ 1,111.0
Finite-Lived Intangible Assets, Accumulated Amortization	(332.8)	(246.5)
Finite-Lived Intangible Assets, Net	780.7	864.5
Amortization of intangible assets	86.6	95.4	$ 99.4
Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Expected Amortization, Year One	80.0
Finite-Lived Intangible Asset, Expected Amortization, Year Two	80.0
Finite-Lived Intangible Asset, Expected Amortization, Year Three	80.0
Finite-Lived Intangible Asset, Expected Amortization, Year Four	80.0
Finite-Lived Intangible Asset, Expected Amortization, Year Five	80.0
Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Expected Amortization, Year One	85.0
Finite-Lived Intangible Asset, Expected Amortization, Year Two	85.0
Finite-Lived Intangible Asset, Expected Amortization, Year Three	85.0
Finite-Lived Intangible Asset, Expected Amortization, Year Four	85.0
Finite-Lived Intangible Asset, Expected Amortization, Year Five	85.0
Computer Software, Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	47.6	45.8
Finite-Lived Intangible Assets, Accumulated Amortization	(33.9)	(27.6)
Finite-Lived Intangible Assets, Net	13.7	18.2
Customer Platforms - Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	856.2	856.2
Finite-Lived Intangible Assets, Accumulated Amortization	(237.9)	(174.4)
Finite-Lived Intangible Assets, Net	618.3	681.8
Customer Relationships - Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	53.0	53.0
Finite-Lived Intangible Assets, Accumulated Amortization	(12.8)	(9.4)
Finite-Lived Intangible Assets, Net	40.2	43.6
Technology-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	156.7	156.0
Finite-Lived Intangible Assets, Accumulated Amortization	(48.2)	(35.1)
Finite-Lived Intangible Assets, Net	$ 108.5	$ 120.9

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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

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