CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 394.4	$ 743.9
Accounts receivable, net	720.5	625.0
Short-term contract assets	65.3	59.1
Inventories, net	1,284.9	1,247.5
Prepaid expenses and other current assets	52.8	62.2
Total current assets	2,517.9	2,737.7
Property, plant and equipment, net	1,688.9	1,665.9
Goodwill	227.2	227.2
Other assets	348.1	354.3
Total assets	4,782.1	4,985.1
Current Liabilities:
Accounts payable	482.6	524.8
Short-term contract liabilities	161.6	163.6
Short-term debt and current portion of long-term debt	27.1	31.9
Other current liabilities	225.8	256.8
Total current liabilities	897.1	977.1
Long-term debt	2,146.4	2,147.7
Accrued postretirement benefits	170.6	175.2
Pension liabilities	38.8	39.7
Other long-term liabilities	156.0	164.9
Total liabilities	3,408.9	3,504.6
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-133,796,517 shares at March 31, 2024 and 132,300,971 shares at December 31, 2023; outstanding-124,441,401 shares at March 31, 2024 and 126,879,099 shares at December 31, 2023	13.4	13.2
Additional paid-in capital	1,703.1	1,697.1
Retained loss	(4.0)	(70.1)
Treasury stock: 9,355,116 shares at March 31, 2024 and 5,421,872 shares at December 31, 2023	(360.1)	(184.0)
Accumulated other comprehensive loss, net of tax	(88.8)	(83.2)
Total ATI stockholders’ equity	1,263.6	1,373.0
Noncontrolling interests
Noncontrolling interests	109.6	107.5
Total Equity	1,373.2	1,480.5
Total Liabilities and Equity	$ 4,782.1	$ 4,985.1