Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 4,907	$ 2,245
Accounts receivable, net	1,501	1,326
Unbilled receivables, net	5,140	5,334
Inventoried costs, net	759	783
Prepaid expenses and other current assets	1,402	997
Assets of disposal group held for sale	1,635	0
Total current assets	15,344	10,685
Property, plant and equipment, net of accumulated depreciation of $6,335 for 2020 and $5,850 for 2019	7,071	6,912
Operating lease right-of-use assets	1,533	1,511
Goodwill	17,518	18,708
Intangible assets, net	783	1,040
Deferred tax assets	311	508
Other non-current assets	1,909	1,725
Total assets	44,469	41,089
Liabilities
Trade accounts payable	1,806	2,226
Accrued employee compensation	1,997	1,865
Advance payments and billings in excess of costs incurred	2,517	2,237
Other current liabilities	3,002	3,106
Liabilities of disposal group held for sale	258	0
Total current liabilities	9,580	9,434
Long-term debt, net of current portion of $742 for 2020 and $1,109 for 2019	14,261	12,770
Pension and other postretirement benefit plan liabilities	6,498	6,979
Operating lease liabilities	1,343	1,308
Other non-current liabilities	2,208	1,779
Total liabilities	33,890	32,270
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: 2020—166,717,179 and 2019—167,848,424	167	168
Paid-in capital	58	0
Retained earnings	10,482	8,748
Accumulated other comprehensive loss	(128)	(97)
Total shareholders’ equity	10,579	8,819
Total liabilities and shareholders’ equity	$ 44,469	$ 41,089