Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Area of a real estate property.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2021 USD ($) ft²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Property, Plant and Equipment
Property, plant and equipment, gross		$ 1,123.3	$ 1,040.9
Less—accumulated depreciation		(342.4)	(309.3)
Property, plant, and equipment, net		780.9	731.6	$ 738.5
Depreciation expense		49.8	49.7	45.7
Tangible asset impairment charges		19.2	5.4	$ 17.2
Silver Spring, Maryland
Property, Plant and Equipment
Area of real estate property \| ft²	141,960
Property, plant and equipment, additions	$ 50.9
Research and development
Property, Plant and Equipment
Tangible asset impairment charges		16.7
Selling, general, and administrative
Property, Plant and Equipment
Tangible asset impairment charges		$ 2.5	5.4
Land improvements
Property, Plant and Equipment
Estimated useful life		15 years
Land and land improvements
Property, Plant and Equipment
Property, plant and equipment, gross		$ 132.6	74.9
Buildings, building improvements, and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross		$ 612.7	593.6
Buildings \| Minimum
Property, Plant and Equipment
Estimated useful life		25 years
Buildings \| Maximum
Property, Plant and Equipment
Estimated useful life		39 years
Building improvements \| Minimum
Property, Plant and Equipment
Estimated useful life		10 years
Building improvements \| Maximum
Property, Plant and Equipment
Estimated useful life		39 years
Buildings under construction
Property, Plant and Equipment
Property, plant and equipment, gross		$ 55.1	47.4
Furniture, equipment, and vehicles
Property, Plant and Equipment
Property, plant and equipment, gross		$ 322.9	$ 325.0
Furniture, equipment, and vehicles \| Minimum
Property, Plant and Equipment
Estimated useful life		3 years
Furniture, equipment, and vehicles \| Maximum
Property, Plant and Equipment
Estimated useful life		25 years
Facility and Equipment
Property, Plant and Equipment
Impairment of long-lived assets to be disposed of		$ 11.6