CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 572.2	$ 490.8
Accounts receivable, net	388.0	554.1
Short-term contract assets	41.7	38.5
Inventories, net	1,035.9	1,155.3
Prepaid expenses and other current assets	48.5	64.3
Total current assets	2,086.3	2,303.0
Property, plant and equipment, net	2,466.6	2,450.1
Goodwill	238.4	525.8
Other assets	272.6	355.7
Total assets	5,063.9	5,634.6
Current Liabilities:
Accounts payable	240.7	521.2
Short-term contract liabilities	97.8	78.7
Short-term debt and current portion of long-term debt	12.2	11.5
Other current liabilities	213.0	237.8
Total current liabilities	563.7	849.2
Long-term debt	1,529.0	1,387.4
Accrued postretirement benefits	300.2	312.5
Pension liabilities	608.9	731.5
Other long-term liabilities	212.3	160.8
Total liabilities	3,214.1	3,441.4
ATI Stockholders' Equity:
Preferred stock, par value $0.10: authorized-50,000,000 shares; issued-none	0.0	0.0
Common stock, par value $0.10: authorized-500,000,000 shares; issued-126,817,461 shares at September 30, 2020 and 126,695,171 shares at December 31, 2019; outstanding-126,815,756 shares at September 30, 2020 and 126,085,348 shares at December 31, 2019	12.7	12.7
Additional paid-in capital	1,622.2	1,618.0
Retained earnings	1,227.4	1,679.3
Treasury stock: 1,705 shares at September 30, 2020 and 609,823 shares at December 31, 2019	0.0	(18.2)
Accumulated other comprehensive loss, net of tax	(1,128.6)	(1,201.7)
Total ATI stockholders’ equity	1,733.7	2,090.1
Noncontrolling interests
Noncontrolling interests	116.1	103.1
Total Equity	1,849.8	2,193.2
Total Liabilities and Equity	$ 5,063.9	$ 5,634.6
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, authorized	50,000,000	50,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, authorized	500,000,000	500,000,000