Supplemental Balance Sheet Detail - Components of Supplemental Balance Sheet Detail (Detail) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment
Property, Plant and Equipment		$ 3,246	$ 3,082
Less accumulated depreciation	[1]	(1,117)	(1,015)
Property, plant and equipment, net	[2]	2,129	2,067
Accrued liabilities
Accrued contract costs		767	796
Advances from equity method and proportionally consolidated joint ventures and consortiums	[3]	124	148
Income taxes payable		70	69
Accrued interest payable		126	32
Other accrued liabilities	[4]	571	519
Accrued liabilities		1,658	1,564
Other non-current liabilities
Pension, post-retirement medical and other employee benefit obligations		338	324
Self-insurance reserve		76	80
Income tax reserves		84	86
Other	[5]	285	174
Other non-current liabilities		783	664
Marine Vessels [Member]
Property, plant and equipment
Property, Plant and Equipment		1,723	1,686
Construction And Other Equipment [Member]
Property, plant and equipment
Property, Plant and Equipment		643	704
Building [Member]
Property, plant and equipment
Property, Plant and Equipment		296	292
Company Equipment under Construction [Member]
Property, plant and equipment
Property, Plant and Equipment		204	99
Assets under Finance Leases [Member]
Property, plant and equipment
Property, Plant and Equipment		59	75
Land [Member]
Property, plant and equipment
Property, Plant and Equipment		39	41
Other [Member}
Property, plant and equipment
Property, Plant and Equipment		$ 282	$ 185

[1] Our depreciation expense was approximately $128 million, $115 million and $93 million in 2019, 2018 and 2017, 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] Represents advances from our joint ventures and consortiums in which we participate. See Note 10, Joint Venture and Consortium Arrangements for further discussion.

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

[5] Includes $129 million in 2019 and $17 million in 2018 associated with accrued liabilities incurred in connection with the Amazon Modification Agreements, as defined in Note 14, Lease Obligations.