Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 1,579	$ 11,225
Accounts receivable, net	1,448	1,054
Unbilled receivables, net	5,026	3,465
Inventoried costs, net	654	398
Prepaid expenses and other current assets	973	445
Total current assets	9,680	16,587
Property, plant and equipment, net of accumulated depreciation of $5,369 for 2018 and $5,066 for 2017	6,372	4,225
Goodwill	18,672	12,455
Intangible assets, net	1,372	52
Deferred tax assets	94	447
Other non-current assets	1,463	1,362
Total assets	37,653	35,128
Liabilities
Trade accounts payable	2,182	1,661
Accrued employee compensation	1,676	1,382
Advance payments and amounts in excess of costs incurred	1,917	1,761
Other current liabilities	2,499	2,288
Total current liabilities	8,274	7,092
Long-term debt, net of current portion of $517 for 2018 and $867 for 2017	13,883	14,399
Pension and OPB plan liabilities	5,755	5,511
Deferred tax liabilities	108	0
Other non-current liabilities	1,446	994
Total liabilities	29,466	27,996
Commitments and contingencies (Note 12)
Shareholders’ equity
Preferred stock, $1 par value; 10,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $1 par value; 800,000,000 shares authorized; issued and outstanding: 2018—170,607,336 and 2017—174,085,619	171	174
Paid-in capital	0	44
Retained earnings	8,068	6,913
Accumulated other comprehensive (loss) income	(52)	1
Total shareholders’ equity	8,187	7,132
Total liabilities and shareholders’ equity	$ 37,653	$ 35,128