Reportable Segments - Summary of Segment Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Revenues:
Total segment revenues	$ 2,101.6	$ 1,398.6	$ 1,066.2
Gross profit:
Total segment gross profit	430.0	291.8	196.8
Operating profit:
Total segment operating profit	185.7	121.4	29.9
ASSETS
Total segment assets	2,025.4	1,102.5
Revenues	2,101.6	1,398.6	1,066.2
Products [Member]
Revenues:
Total segment revenues	1,803.9	1,131.2	840.8
Gross profit:
Total segment gross profit	325.2	196.5	121.8
Operating profit:
Total segment operating profit	154.3	97.2	18.3
ASSETS
Total segment assets	1,757.6	868.4
Revenues	1,803.9	1,131.2	840.8
SSB [Member]
Revenues:
Total segment revenues	297.7	267.4	225.0
Gross profit:
Total segment gross profit	104.8	95.3	75.0
Operating profit:
Total segment operating profit	31.4	24.2	11.6
ASSETS
Total segment assets	267.8	234.1
Revenues	$ 297.7	$ 267.4	$ 225.0