Goodwill and Other Intangible Assets - Schedule of Change in Net Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	3 Months Ended
Apr. 02, 2022 USD ($)
Goodwill [Line Items]
Balance, beginning of period	$ 2,827,344
Acquisitions	69,035
Translation	7,755
Balance, end of period	2,904,134
Steel Mills [Member]
Goodwill [Line Items]
Balance, beginning of period	613,175
Acquisitions	69,097
Balance, end of period	682,272
Steel Products [Member]
Goodwill [Line Items]
Balance, beginning of period	1,439,874
Acquisitions	(62)
Translation	7,755
Balance, end of period	1,447,567
Raw Materials [Member]
Goodwill [Line Items]
Balance, beginning of period	774,295
Balance, end of period	$ 774,295

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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