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Segment Information - Schedule of Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 28, 2024
Sep. 28, 2024
Jun. 29, 2024
Mar. 30, 2024
Dec. 30, 2023
Sep. 30, 2023
Jul. 01, 2023
Apr. 01, 2023
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]                      
Net sales $ 923,536 $ 997,831 $ 997,745 $ 849,654 $ 732,377 $ 819,792 $ 896,984 $ 971,192 $ 3,768,766 $ 3,420,345 $ 3,982,455
Corporate expenses                 770,389 756,053 877,149
Interest expense                 (410) (1,221) (810)
Interest income                 53,468 38,208 6,457
Realized and unrealized gains on short-term investments                 914 41,865 2,918
Environmental expense                 (2,218) (825) (1,298)
Gain on extinguishment of NMTC liability                 1,265 7,534 0
Pension plan termination expense                 0 0 (13,100)
Other (expense) income, net                 (2,946) 3,618 4,715
Income before income taxes                 820,462 845,232 876,031
Piping Systems                      
Segment Reporting Information [Line Items]                      
Net sales                 2,477,729 2,355,516 2,706,065
Industrial Metals                      
Segment Reporting Information [Line Items]                      
Net sales                 803,277 564,115 627,270
Climate                      
Segment Reporting Information [Line Items]                      
Net sales                 487,760 500,714 649,120
Operating Segments                      
Segment Reporting Information [Line Items]                      
Net sales                 3,820,981 3,461,238 4,025,080
Manufacturing costs                 2,811,866 2,508,994 2,936,253
Sales and marketing expense                 45,134 42,942 45,781
Distribution expense                 43,482 41,386 40,827
Other segment items                 64,434 50,434 60,626
Segment operating income                 856,065 817,482 941,593
Operating Segments | Piping Systems                      
Segment Reporting Information [Line Items]                      
Net sales                 2,514,096 2,382,573 2,730,084
Manufacturing costs                 1,797,203 1,703,161 1,960,977
Sales and marketing expense                 27,605 26,549 24,292
Distribution expense                 39,108 36,645 35,772
Other segment items                 32,729 46,979 37,981
Segment operating income                 617,451 569,239 671,062
Operating Segments | Industrial Metals                      
Segment Reporting Information [Line Items]                      
Net sales                 818,439 577,875 644,689
Manufacturing costs                 697,400 487,245 550,040
Sales and marketing expense                 3,822 2,412 2,358
Distribution expense                 2,237 2,331 2,368
Other segment items                 22,420 9,508 7,459
Segment operating income                 92,560 76,379 82,464
Operating Segments | Climate                      
Segment Reporting Information [Line Items]                      
Net sales                 488,446 500,790 650,307
Manufacturing costs                 317,263 318,588 425,236
Sales and marketing expense                 13,707 13,981 19,131
Distribution expense                 2,137 2,410 2,687
Other segment items                 9,285 (6,053) 15,186
Segment operating income                 146,054 171,864 188,067
Intersegment sales                      
Segment Reporting Information [Line Items]                      
Net sales                 (52,215) (40,893) (42,625)
Intersegment sales | Piping Systems                      
Segment Reporting Information [Line Items]                      
Net sales                 (36,367) (27,057) (24,019)
Intersegment sales | Industrial Metals                      
Segment Reporting Information [Line Items]                      
Net sales                 (15,162) (13,760) (17,419)
Intersegment sales | Climate                      
Segment Reporting Information [Line Items]                      
Net sales                 (686) (76) (1,187)
Corporate expenses                      
Segment Reporting Information [Line Items]                      
Corporate expenses                 (85,676) (61,429) (64,444)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment                      
Segment Reporting Information [Line Items]                      
Interest expense                 (410) (1,221) (810)
Interest income                 53,468 38,208 6,457
Realized and unrealized gains on short-term investments                 914 41,865 2,918
Environmental expense                 (2,218) (825) 1,298
Gain on extinguishment of NMTC liability                 1,265 7,534 4,715
Pension plan termination expense                     $ (13,100)
Other (expense) income, net                 $ (2,946) $ 3,618