Realized and Unrealized Gains and Loss (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 28, 2026 |
Jun. 29, 2025 |
Jun. 28, 2026 |
Jun. 29, 2025 |
|
| Realized gains and losses included in 'Other (income) expense, net' in the condensed consolidated statement of operations | ||||
| Realized gains | $ 0.2 | $ 0.4 | $ 0.9 | $ 1.2 |
| Realized losses | 0.1 | 0.1 | 0.2 | 1.4 |
| 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 | 8.1 | 4.1 | 8.1 | 4.4 |
| Unrealized losses on equity securities | $ 0.0 | $ 0.0 | $ 4.0 | $ 3.1 |