CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 800	$ 520
Accounts receivable—trade, net	1,087	932
Accounts receivable—other	185	175
Contracts in progress	795	704
Other current assets	195	139
Accounts payable	1,105	595
Advance billings on contracts	1,419	1,954
Accrued liabilities, current	$ 1,658	$ 1,564
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	255,000,000	255,000,000
Common stock, shares issued	196,000,000	183,000,000
Treasury stock, shares	3,000,000	3,000,000
Variable Interest Entities ("VIEs") [Member]
Cash and cash equivalents	$ 213	$ 146
Accounts receivable—trade, net	102	29
Accounts receivable—other	32	57
Contracts in progress	195	144
Other current assets	25	24
Accounts payable	182	277
Advance billings on contracts	542	717
Accrued liabilities, current	$ 69	$ 136