Accrued Liablities - Summary of Accrued Liabilities (Detail) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Accrued Liabilities Current [Abstract]
Accrued contract costs		$ 855	$ 796
Advances from equity method and proportionally consolidated joint ventures and consortiums	[1]	139	148
Income taxes payable		45	69
Other accrued liabilities	[2]	655	551
Accrued liabilities		$ 1,694	$ 1,564

[1] Represents advances from the joint ventures and consortiums in which we participate. See Note 9, Joint Venture and Consortium Arrangements, for further discussion

[2] ^{Represents various accruals that are each individually less than 5% of total current liabilities.}