v3.26.1
REVENUES Disaggregated Revenue Table (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 100.00% 100.00% 100.00% 100.00%
Revenues $ 3,731.1 $ 3,527.3 $ 7,268.7 $ 6,872.4
North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 87.00% 87.00% 86.00% 87.00%
Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 9.00% 9.00% 10.00% 9.00%
Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 4.00% 4.00% 4.00% 4.00%
UNITED STATES        
Disaggregation of Revenue [Line Items]        
Revenues $ 3,095.5 $ 2,931.6 $ 6,009.5 $ 5,745.4
Percent of Domestic Revenue 83.00% 83.10% 82.70% 83.60%
Diagnostics        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 78.00% 78.00% 78.00% 78.00%
Diagnostics | North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 78.00% 78.00% 78.00% 78.00%
Diagnostics | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Client [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 22.00% 24.00% 23.00% 24.00%
Diagnostics | Client [Member] | North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 22.00% 24.00% 23.00% 24.00%
Diagnostics | Client [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Client [Member] | Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Self-Pay [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 11.00% 10.00% 10.00% 10.00%
Diagnostics | Self-Pay [Member] | North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 11.00% 10.00% 10.00% 10.00%
Diagnostics | Self-Pay [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Self-Pay [Member] | Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Medicare and Medicaid [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 8.00% 8.00% 8.00% 8.00%
Diagnostics | Medicare and Medicaid [Member] | North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 8.00% 8.00% 8.00% 8.00%
Diagnostics | Medicare and Medicaid [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Medicare and Medicaid [Member] | Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Third party [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 37.00% 36.00% 37.00% 36.00%
Diagnostics | Third party [Member] | North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 37.00% 36.00% 37.00% 36.00%
Diagnostics | Third party [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Diagnostics | Third party [Member] | Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 0.00% 0.00% 0.00% 0.00%
Biopharma Laboratory Services        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 22.00% 22.00% 22.00% 22.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 22.00% 22.00% 22.00% 22.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member] | North America        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 9.00% 9.00% 8.00% 9.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 9.00% 9.00% 10.00% 9.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member] | Other countries [Member]        
Disaggregation of Revenue [Line Items]        
Percent of Revenue Contributed 4.00% 4.00% 4.00% 4.00%