Realized and Unrealized Gains and Loss (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 27, 2026 |
Sep. 28, 2025 |
Sep. 27, 2026 |
Sep. 28, 2025 |
|
| Realized gains and losses included in 'Other (income) expense, net' in the condensed consolidated statement of operations | ||||
| Realized gains | $ 0.6 | $ 0.7 | $ 1.5 | $ 1.8 |
| Realized losses | 0.0 | 0.0 | 0.2 | 1.3 |
| Unrealized gains and losses on equity securities included in 'Other (income) expense, net' in the condensed consolidated statement of operations | ||||
| Unrealized gains on equity securities | 1.9 | 3.1 | 10.0 | 7.4 |
| Unrealized losses on equity securities | $ 0.3 | $ 0.1 | $ 4.3 | $ 3.2 |