Property, Plant and Equipment

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

13. Property, Plant and Equipment

		December 31,
(In millions)	Useful Lives	2021		2020
Land and depletable property	—	$	213	$	237
Buildings	35-40 years	1,558		1,154
Machinery and equipment
Steel producing	2-30 years	15,968		14,417
Transportation	3-40 years	—		282
Other	5-30 years	94		92
Information technology	5-6 years	798		796
Assets under finance lease	5-15 years	160		113
Construction in process	—	885		613
Total		19,676		17,704
Less accumulated depreciation and depletion		12,422		12,260
Net		$	7,254	$	5,444

Amounts in accumulated depreciation and depletion for assets acquired under finance leases were $59 million and $40 million at December 31, 2021 and 2020, respectively.