Business Segments (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Schedule of sales by segment

(In millions)	2020		2019		2018
Total sales:
High Performance Materials & Components	$	1,235.4	$	2,054.2	$	2,039.2
Advanced Alloys & Solutions	1,947.5		2,392.2		2,302.4
Total sales	3,182.9		4,446.4		4,341.6
Intersegment sales:
High Performance Materials & Components	70.8		75.7		76.1
Advanced Alloys & Solutions	130.0		248.2		218.9
Total intersegment sales	200.8		323.9		295.0
Sales to external customers:
High Performance Materials & Components	1,164.6		1,978.5		1,963.1
Advanced Alloys & Solutions	1,817.5		2,144.0		2,083.5
Total sales to external customers	$	2,982.1	$	4,122.5	$	4,046.6

Schedule of operating profit (loss) by segment

(In millions)	2020		2019		2018
EBITDA:
High Performance Materials & Components	$	129.6	$	356.2	$	360.3
Advanced Alloys & Solutions	115.0		172.6		206.4
Total segment EBITDA	244.6		528.8		566.7
LIFO and net realizable value reserves (See Note 6)	—		(0.1)		(0.7)
Corporate expenses	(40.9)		(65.3)		(57.3)
Closed operations and other expenses	(7.4)		(24.0)		(19.5)
Total ATI Adjusted EBITDA	196.3		439.4		489.2
Depreciation & amortization	(143.3)		(151.1)		(156.4)
Interest expense, net	(94.4)		(99.0)		(101.0)
Restructuring and other charges (See Note 3)	(1,132.1)		(4.5)		—
Impairment of goodwill (See Note 4)	(287.0)		—		—
Joint venture restructuring and impairment charge (See Note 9)	(2.4)		(11.4)		—
Gain on joint venture deconsolidation (See Note 9)	—		—		15.9
Debt extinguishment charge (See Note 12)	(21.5)		(21.6)		—
Gain on asset sales, net	2.5		89.8		—
Income (loss) before income taxes	$	(1,481.9)	$	241.6	$	247.7

Schedule of other financial information by segment

Certain additional information regarding the Company’s business segments is presented below:

(In millions)	2020		2019		2018
Depreciation and amortization:
High Performance Materials & Components	$	78.1	$	84.6	$	90.6
Advanced Alloys & Solutions	62.1		63.5		62.9
Other	3.1		3.0		2.9
Total depreciation and amortization	$	143.3	$	151.1	$	156.4
Capital expenditures:
High Performance Materials & Components	$	83.1	$	119.9	$	71.7
Advanced Alloys & Solutions	45.9		47.4		64.5
Corporate	7.5		0.9		3.0
Total capital expenditures	$	136.5	$	168.2	$	139.2

Identifiable assets:	2020		2019		2018
High Performance Materials & Components	$	1,753.9	$	2,324.6	$	2,400.7
Advanced Alloys & Solutions	1,548.8		2,621.1		2,590.4
Corporate:
Deferred Taxes	5.1		64.5		8.7
Cash and cash equivalents and other	727.1		624.4		502.0
Total assets	$	4,034.9	$	5,634.6	$	5,501.8

Schedule of company assets by country

($ in millions)	2020		Percent of total		2019		Percent of total		2018		Percent of total
Total assets:
United States	$	3,356.8	83	%	$	4,956.4	88	%	$	4,859.1	88	%
China	325.5		8	%	288.1		5	%	287.3		5	%
United Kingdom	122.4		3	%	141.3		3	%	136.7		3	%
Other	230.2		6	%	248.8		4	%	218.7		4	%
Total Assets	$	4,034.9	100	%	$	5,634.6	100	%	$	5,501.8	100	%