Earnings Per Share - Computations of Earnings per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Earnings Per Share [Abstract]
Net income	$ 100.3	$ 133.9	$ 151.6	$ 230.2
Basic earnings per common share	$ 0.83	$ 1.07	$ 1.25	$ 1.83
Diluted earnings per common share	$ 0.83	$ 1.06	$ 1.24	$ 1.82
Basic average shares outstanding	120.3	125.1	121.3	125.5
Stock-based awards	0.4	0.7	0.5	0.9
Diluted average shares outstanding	120.7	125.8	121.8	126.4
Antidilutive stock-based awards excluded from weighted- average number of shares outstanding for diluted earnings per share	2.5	1.3	1.8	0.8

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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