Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 29, 2018	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Non-cash impairment charge			$ 66,916	$ 110,000
Property, plant and equipment, net	$ 6,178,555		$ 6,178,555	5,334,748
Steel Mills [Member]
Property, Plant and Equipment [Line Items]
Non-cash impairment charge	20,000
Land and Improvements, Net [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives range			5 years
Land and Improvements, Net [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives range			25 years
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives range			4 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives range			40 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives range			2 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives range			15 years
Carrying Value of Two Field of Wells [Member]
Property, Plant and Equipment [Line Items]
Non-cash impairment charge		$ 110,000
Property, plant and equipment, net	66,600		$ 66,600	71,000
Carrying Value of Third Field of Wells [Member]
Property, Plant and Equipment [Line Items]
Non-cash impairment charge			35,000
Property, plant and equipment, net	$ 12,300		$ 12,300	$ 51,800