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Drilling Fleet (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Construction work in progress, at beginning of period |  | $ 2,171 | $ 3,735
Total capital expenditures |  | 258 | 826
Changes in accrued capital additions |  | (23) | (90)
Construction in progress sold |  | (289) |
Construction work in progress, at end of period | $ 2,070 | 2,070 | 2,634
Assets held and used |  |  |
Loss associated with impairment | $ 96 | $ 96 |
Loss associated with impairment per diluted share | $ 0.25 | $ 0.25 |
Loss associated with impairment, tax effect | $ 0 | $ 0 |
New builds |  |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Total capital expenditures |  | 200 | 740
Property and equipment placed into service |  |  | (1,672)
Other construction projects and capital additions |  |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Total capital expenditures |  | 58 | 86
Other property and equipment |  |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Property and equipment placed into service |  | $ (47) | $ (165)

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