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Drilling Fleet (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Total capital expenditures | $ 387 | $ 184 | $ 497
Construction work in progress impaired | (609) | (1,464) | (1,498)
Construction in Progress |  |  |
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 | 632 | 1,392 | 2,171
Total capital expenditures | 387 | 184 | 497
Changes in accrued capital additions | 20 | 4 | (23)
Construction work in progress impaired | (5) |  |
Construction work in progress acquired in business combination |  | 28 |
Construction work in progress sold |  |  | (289)
Construction work in progress, at end of period | 753 | 632 | 1,392
New builds |  |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Total capital expenditures | 129 | 75 | 397
Property and equipment placed into service |  | (903) | (896)
Other property and equipment |  |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |  |
Total capital expenditures | 258 | 109 | 100
Property and equipment placed into service | $ (281) | $ (73) | $ (68)

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