Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Jan. 01, 2023
Assets
Cash and cash equivalents	$ 743.9	$ 584.0
Accounts receivable, net	625.0	579.2
Short-term contract assets	59.1	64.1
Inventories, net	1,247.5	1,195.7
Prepaid expenses and other current assets	62.2	53.4
Total Current Assets	2,737.7	2,476.4
Property, plant and equipment, net	1,665.9	1,549.1
Goodwill	227.2	227.2
Other assets	354.3	192.9
Total Assets	4,985.1	4,445.6
Liabilities and Stockholders’ Equity
Accounts payable	524.8	553.3
Short-term contract liabilities	163.6	149.1
Short-term debt and current portion of long-term debt	31.9	41.7
Other current liabilities	256.8	219.8
Total Current Liabilities	977.1	963.9
Long-term debt	2,147.7	1,706.3
Accrued postretirement benefits	175.2	184.9
Pension liabilities	39.7	225.6
Other long-term liabilities	164.9	207.7
Total Liabilities	3,504.6	3,288.4
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- 132,300,971 shares at December 31, 2023 and 131,392,262 shares at January 1, 2023; outstanding-126,879,099 shares at December 31, 2023 and 128,273,042 shares at January 1, 2023	13.2	13.1
Additional paid-in capital	1,697.1	1,668.1
Retained loss	(70.1)	(480.9)
Treasury stock: 5,421,872 shares at December 31, 2023 and 3,119,220 shares at January 1, 2023	(184.0)	(87.0)
Accumulated other comprehensive loss, net of tax	(83.2)	(67.4)
Total ATI Stockholders’ Equity	1,373.0	1,045.9
Noncontrolling interests
Noncontrolling Interests	107.5	111.3
Total Stockholders' Equity	1,480.5	1,157.2
Total Liabilities and Stockholders' Equity	$ 4,985.1	$ 4,445.6