SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Text Block [Abstract]

Accounts Receivable, Allowance for Credit Loss

The following is a roll-forward of our allowance for credit losses associated with Accounts receivable, net:

	(In Millions)
	2020		2019
Allowance for credit losses as of January 1	$	—	$	—
Increase in allowance	(5)		—
Allowance for credit losses as of December 31	$	(5)	$	—

Schedule Of Inventories

The following table presents the detail of our Inventories in the Statements of Consolidated Financial Position:

	(In Millions)
	Year Ended December 31,
	2020		2019
Product inventories
Finished and semi-finished goods	$	2,125	$	114
Work-in-process	—		69
Raw materials	1,431		9
Total product inventories	3,556		192
Manufacturing supplies and critical spares	272		125
Inventories	$	3,828	$	317

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

A reconciliation of capital additions to cash paid for capital expenditures is as follows:

	(In Millions)
	Year Ended December 31,
	2020		2019		2018
Capital additions	$	483	$	690	$	395
Less:
Non-cash accruals	(86)		15		94
Right-of-use assets - finance leases	44		29		8
Grants	—		(10)		(3)
Cash paid for capital expenditures including deposits	$	525	$	656	$	296

Cash payments (receipts) for interest and income taxes are as follows:

	(In Millions)
	2020		2019		2018
Taxes paid on income	$	5	$	—	$	3
Income tax refunds	(120)		(118)		(11)
Interest paid on debt obligations net of capitalized interest1	170		98		106
1 Capitalized interest was $53 million, $25 million and $7 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Schedule of Noncash or Part Noncash Acquisitions

Non-Cash Investing and Financing Activities

	(In Millions)
	2020		2019		2018
Fair value of common shares issued as part of consideration in connection with AM USA Transaction	$	990	$	—	$	—
Fair value of Series B Participating Redeemable Preferred Stock issued as part of consideration in connection with AM USA Transaction	738		—		—
Fair value of settlement of a pre-existing relationship as part of consideration in connection with AM USA Transaction	237		—		—
Fair value of common shares issued as consideration in connection with AK Steel Merger	618		—		—
Fair value of equity awards assumed in connection with AK Steel Merger	4		—		—