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Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 966.9	$ 879.6
Less: Accumulated depreciation and amortization	451.6	395.4
Total property and equipment, net	515.3	484.2
Depreciation expense	68.3	64.4	$ 50.8
Computer software costs
Computer software costs	289.2	249.5
Less: Accumulated amortization	175.0	150.2
Computer software costs, net	114.2	99.3
Amortization expense related to computer software costs	25.4	21.0	$ 17.6
Land
Property and Equipment
Property and equipment before accumulated depreciation and amortization	81.9	72.8
Buildings and leasehold improvements
Property and Equipment
Property and equipment before accumulated depreciation and amortization	$ 108.4	103.6
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	$ 14.1	15.7
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	$ 329.2	292.2
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	$ 433.4	395.4
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	$ 0.9	$ 5.2

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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 before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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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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