Drilling Fleet (Tables)

12 Months Ended

Dec. 31, 2016

Drilling Fleet

Changes in our construction work in progress, including capital expenditures and capitalized interest

For each of the three years in the period ended December 31, 2016, the changes in our construction work in progress, including capital expenditures and other capital additions, were as follows (in millions):

	Years ended December 31,
	2016		2015		2014
Construction work in progress, at beginning of period	$	3,735	$	2,447	$	2,708
Capital expenditures
Newbuild construction program		1,206		1,622		1,436
Other equipment and construction projects		138		379		729
Total capital expenditures		1,344		2,001		2,165
Changes in accrued capital additions		(86)		(11)		(45)
Impairment of construction work in progress		—		(52)		—
Property and equipment placed into service
Newbuild construction program		(2,557)		—		(1,522)
Other property and equipment		(265)		(650)		(859)
Construction work in progress, at end of period	$	2,171	$	3,735	$	2,447