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Description of Business and Summary of Significant Accounting Policies (Property and Equipment Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reported Value Measurement [Member] | Continuing Operations [Member]
Property, Plant and Equipment [Line Items]
Assets held for sale in continuing operations	$ 25.5	$ 40.6
Reported Value Measurement [Member] | Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Assets held for sale in discontinued operations	$ 8.0	$ 8.0
Buildings and improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life	5 years
Buildings and improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life	40 years
Furniture, fixtures, and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life	3 years
Furniture, fixtures, and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life	10 years

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Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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