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Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 687.3	$ 652.3
Less: Accumulated depreciation and amortization	338.4	309.7
Total property and equipment, net	348.9	342.6
Depreciation expense	50.8	52.7	$ 54.5
Computer software costs
Computer software costs	217.9	191.7
Less: Accumulated amortization	131.1	116.1
Computer software costs, net	86.8	75.6
Amortization expense related to computer software costs	17.6	18.5	$ 17.8
Land
Property and Equipment
Property and equipment before accumulated depreciation and amortization	19.9	19.1
Buildings and leasehold improvements
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 77.4	74.5
Buildings and leasehold improvements | Minimum
Property and Equipment
Estimated useful lives	3 years
Buildings and leasehold improvements | Maximum
Property and Equipment
Estimated useful lives	40 years
Office equipment, furniture and fixtures
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 14.7	15.3
Office equipment, furniture and fixtures | Minimum
Property and Equipment
Estimated useful lives	3 years
Office equipment, furniture and fixtures | Maximum
Property and Equipment
Estimated useful lives	7 years
Computer equipment and software costs
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 258.4	275.8
Computer equipment and software costs | Minimum
Property and Equipment
Estimated useful lives	3 years
Computer equipment and software costs | Maximum
Property and Equipment
Estimated useful lives	9 years
Machinery, equipment and vehicles
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 316.9	267.7
Machinery, equipment and vehicles | Minimum
Property and Equipment
Estimated useful lives	3 years
Machinery, equipment and vehicles | Maximum
Property and Equipment
Estimated useful lives	40 years
Software development in progress
Computer software costs
Computer software costs	$ 5.2	$ 13.7

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- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

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Amount of expense for amortization of capitalized computer software costs.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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