Consolidated Balance Sheets - USD ($)	Jun. 24, 2018	Dec. 31, 2017	Jun. 25, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 1,181,000,000	$ 2,861,000,000	$ 2,452,000,000	$ 1,837,000,000
Receivables, net	2,482,000,000	2,265,000,000
Contract assets	9,281,000,000	7,992,000,000
Inventories	3,038,000,000	2,878,000,000
Other current assets	522,000,000	1,509,000,000
Total current assets	16,504,000,000	17,505,000,000
Property, plant and equipment, net	5,786,000,000	5,775,000,000
Goodwill	10,781,000,000	10,807,000,000
Intangible assets, net	3,646,000,000	3,797,000,000
Deferred income taxes	3,051,000,000	3,156,000,000
Other noncurrent assets	5,357,000,000	5,580,000,000
Total assets	45,125,000,000	46,620,000,000
Current liabilities
Accounts payable	2,675,000,000	1,467,000,000
Contract liabilities	6,413,000,000	7,028,000,000
Salaries, benefits and payroll taxes	2,051,000,000	1,785,000,000
Current maturities of long-term debt	750,000,000	750,000,000
Other current liabilities	1,992,000,000	1,883,000,000
Total current liabilities	13,881,000,000	12,913,000,000
Long-term debt, net	13,479,000,000	13,513,000,000
Accrued pension liabilities	12,196,000,000	15,703,000,000
Other postretirement benefit liabilities	706,000,000	719,000,000
Other noncurrent liabilities	4,384,000,000	4,548,000,000
Total liabilities	44,646,000,000	47,396,000,000
Stockholders’ equity
Common stock, $1 par value per share	283,000,000	284,000,000
Additional paid-in capital	0	0
Retained earnings	14,528,000,000	11,405,000,000
Accumulated other comprehensive loss	(14,395,000,000)	(12,539,000,000)
Total stockholders’ equity (deficit)	416,000,000	(850,000,000)
Noncontrolling interests in subsidiary	63,000,000	74,000,000
Total equity (deficit)	479,000,000	(776,000,000)	$ 1,259,000,000	$ 1,477,000,000
Total liabilities and equity	$ 45,125,000,000	$ 46,620,000,000