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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2024
Stockholders' Equity Note [Abstract] |
Schedule of Stock by Class [Table Text Block] | Changes to Bio-Rad's issued common stock shares are as follows (in thousands):
| Class A Shares |  | Class B Shares
Balance at January 1, 2022 | 25,134 |  |  | 5,078 |
Class B to Class A conversions | 20 |  |  | (20) |
Issuance of common stock | 8 |  |  | 16 |
Balance at December 31, 2022 | 25,162 |  |  | 5,074 |
Class B to Class A conversions | 8 |  |  | (8) |
Issuance of common stock | — |  |  | 30 |
Balance at December 31, 2023 | 25,170 |  |  | 5,096 |
Class B to Class A conversions | 21 |  |  | (21) |
Issuance of common stock | — |  |  | — |
Balance at December 31, 2024 | 25,191 |  |  | 5,075 |
Class of Treasury Stock [Table Text Block] | The share repurchase activity under the share repurchase programs through open market transactions for the years ended December 31, 2024, 2023 and 2022 are summarized as follows:
| Number of Shares Purchased | Weighted-Average Price per Share | Total Shares Repurchased To Date | Remaining Authorized Value (in millions)
May 1, 2022 - May 31, 2022 | 255,284 |  | $ | 489.65 |  | 918,367 |  | $ | 98.1 |
November 1, 2022 - November 30, 2022 | 241,408 |  | $ | 375.63 |  | 1,159,775 |  | $ | 207.4 |
May 1, 2023 – May 31, 2023 | 549,863 |  | $ | 377.20 |  | 1,709,638 |  | $ | — |
September 1, 2023 – September 30, 2023 | 58,478 |  | $ | 364.61 |  | 1,768,116 |  | $ | 478.7 |
November 1, 2023 – November 30, 2023 | 659,416 |  | $ | 303.30 |  | 2,427,532 |  | $ | 278.7 |
March 1, 2024 – March 31, 2024 | 14,250 |  | $ | 329.98 |  | 2,441,782 |  | $ | 274.0 |
May 1, 2024 – May 31, 2024 | 221,893 |  | $ | 289.69 |  | 2,663,675 |  | $ | 209.7 |
June 1, 2024 – June 30, 2024 | 124,333 |  | $ | 287.29 |  | 2,788,008 |  | $ | 174.0 |
July 1, 2024 – July 31, 2024 | 328,171 |  | $ | 293.01 |  | 3,116,179 |  | $ | 577.8 |
August 1, 2024 – August 31, 2024 | 2,210 |  | $ | 321.73 |  | 3,118,389 |  | $ | 577.1 |

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