CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 541.7	$ 645.9
Accounts receivable, net	423.9	345.8
Short-term contract assets	42.0	38.9
Inventories, net	1,047.8	997.1
Prepaid expenses and other current assets	38.0	38.3
Total current assets	2,093.4	2,066.0
Property, plant and equipment, net	1,478.7	1,469.2
Goodwill	241.6	240.7
Other assets	254.8	259.0
Total assets	4,068.5	4,034.9
Current Liabilities:
Accounts payable	324.8	290.6
Short-term contract liabilities	118.7	111.8
Short-term debt and current portion of long-term debt	15.7	17.8
Other current liabilities	230.0	233.1
Total current liabilities	689.2	653.3
Long-term debt	1,598.4	1,550.0
Accrued postretirement benefits	321.7	326.7
Pension liabilities	642.8	673.6
Other long-term liabilities	207.1	189.9
Total liabilities	3,459.2	3,393.5
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-127,429,740 shares at March 31, 2021 and 126,820,440 shares at December 31, 2020; outstanding-127,203,072 shares at March 31, 2021 and 126,817,768 shares at December 31, 2020	12.7	12.7
Additional paid-in capital	1,580.5	1,625.5
Retained earnings	103.0	106.5
Treasury stock: 226,668 shares at March 31, 2021 and 2,672 shares at December 31, 2020	(4.7)	0.0
Accumulated other comprehensive loss, net of tax	(1,208.6)	(1,223.6)
Total ATI stockholders’ equity	482.9	521.1
Noncontrolling interests
Noncontrolling interests	126.4	120.3
Total Equity	609.3	641.4
Total Liabilities and Equity	$ 4,068.5	$ 4,034.9