Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 2,350.5	$ 773.6
Restricted Cash, Current	0.3	0.3
Accounts receivable, net	546.4	545.1
Unbilled Receivables, Current	528.3	469.4
Inventory, net	1,118.8	1,012.6
Other current assets	98.7	48.3
Total current assets	4,643.0	2,849.3
Property, plant and equipment, net	2,271.7	2,167.6
Operating Lease, Right-of-Use Asset	48.9
Unbilled Receivable, Non Current	6.4	54.1
Pension assets	449.1	326.7
Deferred tax asset-non-current, net	106.5	205.0
Other assets	80.4	83.2
Total assets	7,606.0	5,685.9
Liabilities
Accounts payable	1,058.3	902.6
Accrued expenses	240.2	313.1
Profit sharing	84.5	68.3
Current portion of long-term debt	50.2	31.4
Operating Lease, Liability, Current	6.0
Advance payments, short-term	21.6	2.2
Contract with Customer, Liability, Current	158.3	157.9
Provision for Loss on Contracts	83.9	12.4
Deferred revenue and other deferred credits, short-term	14.8	20.0
Deferred grant income liability — current	3.6	16.0
Other current liabilities	39.3	58.2
Total current liabilities	1,760.7	1,582.1
Long-term debt	2,984.1	1,864.0
Operating Lease, Liability, Noncurrent	43.0
Advance payments, long-term	333.3	231.9
Pension/OPEB obligation	35.7	34.6
Contract with Customer, Liability, Noncurrent	356.3	369.8
Provision for Loss on Contacts, Non Current	163.5	170.6
Deferred grant income liability — non-current	29.0	28.0
Deferred Tax Liabilities, Net, Noncurrent	8.3	0.8
Deferred revenue and other deferred credits	34.4	31.2
Other non-current liabilities	95.8	134.8
Stockholders’ Equity
Preferred stock, par value $0.01, 10,000,000 shares authorized, no shares issued	0.0	0.0
Additional paid-in capital	1,125.0	1,100.9
Accumulated other comprehensive loss	(109.2)	(196.6)
Retained earnings	3,201.3	2,713.2
Treasury Stock, Value	(2,456.8)	(2,381.0)
Total stockholders' equity	1,761.4	1,237.6
Noncontrolling interest	0.5	0.5
Total equity	1,761.9	1,238.1
Total liabilities and equity	7,606.0	5,685.9
Class A [Member]
Stockholders’ Equity
Common stock	$ 1.1	$ 1.1