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Goodwill and Intangible Assets Goodwill (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($) intangible_asset	Dec. 31, 2019 USD ($)
Goodwill [Line Items]
Goodwill, Acquired During Period			$ 0
Goodwill, Impaired, Accumulated Impairment Loss	$ 0		0
Amortization of intangible assets	14,200,000	$ 15,800,000	42,800,000	$ 51,700,000
Software rights
Goodwill [Line Items]
Number of Intangible Assets | intangible_asset					1
Gross Carrying Amount	69,100,000	79,100,000	69,100,000	79,100,000		$ 79,100,000
Trade name
Goodwill [Line Items]
Gross Carrying Amount	$ 0	$ 34,800,000	$ 0	$ 34,800,000		$ 34,800,000
Fully Amortized [Member] | Software rights
Goodwill [Line Items]
Gross Carrying Amount					$ 10,000,000.0

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Number of Intangible Assets

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

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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