Supplemental Balance Sheet Detail - Components of Supplemental Balance Sheet Detail (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Property, plant and equipment
Property, Plant and Equipment		$ 3,082	$ 2,651
Less accumulated depreciation	[1]	(1,015)	(985)
Property, plant and equipment, net	[2],[3]	2,067	1,666
Accrued liabilities
Accrued contract costs		796	141
Advances from equity method and proportionally consolidated joint ventures and consortiums	[4]	148
Income taxes payable		69	35
Other accrued liabilities	[5]	551	196
Accrued liabilities	[3]	1,564	372
Other non-current liabilities
Pension, post-retirement medical and other employee benefit obligations		324	75
Self-insurance reserve		80	16
Income tax reserves		86	63
Other		174	32
Other non-current liabilities	[3]	664	186
Marine Vessels [Member]
Property, plant and equipment
Property, Plant and Equipment		1,686	1,799
Building [Member]
Property, plant and equipment
Property, Plant and Equipment		292	157
Construction And Other Equipment [Member]
Property, plant and equipment
Property, Plant and Equipment		704	513
Company Equipment under Construction [Member]
Property, plant and equipment
Property, Plant and Equipment		99	34
Assets under Capital Leases [Member]
Property, plant and equipment
Property, Plant and Equipment		75	3
Land [Member]
Property, plant and equipment
Property, Plant and Equipment		41	2
Other [Member}
Property, plant and equipment
Property, Plant and Equipment		$ 185	$ 143

[1] Our depreciation expense was approximately $115 million, $93 million and $90 million in 2018, 2017 and 2016, respectively. For a discussion relating to impairments of marine-vessel-related property, plant and equipment, see Note 16, Fair Value Measurements.

[2] Our marine vessels are included in the area in which they were located as of the reporting date.

[3] Our December 31, 2018 property, plant and equipment, net, accrued liabilities and other non-current liabilities included $374 million, $1.1 billion and $443 million, respectively, associated with the Combination.

[4] Represents advances from our joint ventures and consortiums in which we participate. See Note 10, Joint Venture and Consortium Arrangements for further discussion.

[5] Represents various accruals that are individually less than 5% of total current liabilities.