Fair Value Measurements and Investments Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Long-term debt, net of current maturities	$ 1,201.1	$ 1,200.4
Total long-term debt, excluding leases and current maturities	1,138.3	1,107.5
Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Long-term debt	1,192.1	1,191.2
Total long-term debt, excluding leases and current maturities	1,129.3	1,098.3
Other Long-Term Debt \| Other Long-Term Debt
Debt Instrument [Line Items]
Long-term debt	9.0	9.2
Total long-term debt, excluding leases and current maturities	$ 9.0	$ 9.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

BIO-RAD LABORATORIES, INC. 10-Q