| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 194.61a | 276.77a |
| Trade receivables and contract assets, net of allowances for credit losses of $18,301 and $25,722, respectively | 720.92a | 780.38a |
| Inventories | 278.54a | 380.26a |
| Prepaid assets | 103.21a | 87.88a |
| Other current assets | 105.8a | 83.38a |
| Total current assets | 1,403.07a | 1,608.66a |
| Property, plant and equipment, net | 1,604.01a | 1,639.74a |
| Venture capital and strategic equity investments | 218.35a | 243.81a |
| Operating lease right-of-use assets, net | 412.49a | 394.03a |
| Goodwill | 2,846.61a | 3,095.05a |
| Intangible assets, net | 723.4a | 864.05a |
| Deferred tax assets | 42.18a | 40.28a |
| Other assets | 278.23a | 309.38a |
| Total assets | 7,528.35a | 8,195a |
| Liabilities | — | — |
| Current liabilities | — | — |
| Accounts payable | 140.34a | 168.94a |
| Accrued compensation | 179.42a | 213.29a |
| Deferred revenue | 248.32a | 241.82a |
| Accrued liabilities | 232.01a | 227.83a |
| Other current liabilities | 194.01a | 203.21a |
| Total current liabilities | 994.1a | 1,055.08a |
| Long-term debt, net and finance leases | 2,240.21a | 2,647.15a |
| Operating lease right-of-use liabilities | 483.79a | 419.23a |
| Deferred tax liabilities | 106.96a | 191.35a |
| Other long-term liabilities | 195.21a | 223.19a |
| Total liabilities | 4,020.27a | 4,536a |
| Redeemable noncontrolling interests | 41.13a | 56.72a |
| Equity | — | — |
| Preferred stock, $0.01 par value; 20,000 shares authorized; no shares issued and outstanding | 0a | 0a |
| Common stock, $0.01 par value; 120,000 shares authorized; 51,141 shares issued and outstanding as of December 28, 2024 and 51,338 shares issued and outstanding as of December 30, 2023 | 0.51a | 0.51a |
| Additional paid-in capital | 1,966.24a | 1,905.58a |
| Retained earnings | 1,812.1a | 1,887.22a |
| Treasury stock, at cost, zero shares as of December 28, 2024 and December 30, 2023 | 0a | 0a |
| Accumulated other comprehensive loss | -317.35a | -196.43a |
| Total Charles River Laboratories International, Inc. equity | 3,461.5a | 3,596.88a |
| Nonredeemable noncontrolling interest | 5.45a | 5.39a |
| Total equity | 3,466.95a | 3,602.28a |
| Total liabilities, redeemable noncontrolling interests and equity | 7,528.35a | 8,195a |