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Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]      
Restricted investments $ 0.0 $ 5.6  
Retained earnings 7,416.4 9,260.6  
Other assets 101.9 94.9  
Prepaid Taxes 2.6    
Benefit from income taxes 498.3 212.8 $ 1,076.7
Purchased intangibles, net $ 293.6 $ 320.5  
Property, Plant and Equipment
Property, Plant and Equipment, net

Property, plant and equipment are stated at cost, less accumulated depreciation and amortization. Additions and improvements are capitalized, and maintenance and repairs are expensed as incurred. Included in property, plant and equipment are buildings and equipment acquired under capital lease arrangements, reagent rental equipment and capitalized software, including costs for software developed or obtained for internal use.

Depreciation is computed on a straight-line basis over the estimated useful lives of the assets. The estimated useful lives of property, plant and equipment are generally as follows:
Buildings
10 – 50 years
Leasehold improvementsLife of the improvements or lease term, whichever is shorter
Reagent rental equipment
1 – 5 years
Equipment
3 – 12 years
Computer software
3 – 5 years

When property and equipment is retired or otherwise disposed of, the cost and accumulated depreciation are relieved from the accounts and the net gain or loss is included in operating expenses.
    
Minimum | Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 10 years    
Minimum | Reagent Rental Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 1 year    
Minimum | Equipment      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Minimum | Software Development      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Maximum | Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 50 years    
Maximum | Reagent Rental Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Maximum | Equipment      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 12 years    
Maximum | Software Development      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years