Condensed Consolidated Statements Of Financial Position (Unaudited) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 29	$ 240
Accounts receivable, net	564	252
Contract assets	1,259	1,003
Inventoried costs, net	126	128
Prepaid expenses and other current assets	145	122
Total current assets	2,123	1,745
Property, plant, and equipment, net	2,626	2,517
Operating lease assets	216
Goodwill	1,403	1,263
Other intangible assets, net	518	492
Deferred tax assets	120	163
Miscellaneous other assets	224	203
Total assets	7,230	6,383
Current Liabilities
Trade accounts payable	616	562
Accrued employees' compensation	283	248
Current portion of postretirement plan liabilities	131	131
Current portion of workers' compensation liabilities	227	225
Contract liabilities	338	331
Other current liabilities	307	332
Total current liabilities	1,902	1,829
Long-term debt	1,698	1,283
Pension plan liabilities	763	764
Other postretirement plan liabilities	346	348
Workers' compensation liabilities	459	454
Long-term operating lease liabilities	179
Other long-term liabilities	255	189
Total liabilities	5,602	4,867
Commitments and Contingencies (Note 15)
Stockholders' Equity
Common stock	1	1
Additional paid-in capital	1,943	1,954
Retained earnings (deficit)	2,783	2,609
Treasury stock	(1,848)	(1,760)
Accumulated other comprehensive income (loss)	(1,251)	(1,288)
Total stockholders' equity	1,628	1,516
Total liabilities and stockholders' equity	$ 7,230	$ 6,383