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Drilling Fleet (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |
Total capital expenditures | $ 107 | $ 52
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 | 753 | 632
Total capital expenditures | 107 | 52
Changes in accrued capital additions | (24) | (17)
Property and equipment placed into service | (62) | (20)
Construction work in progress, at end of period | 774 | 647
New builds |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |
Total capital expenditures | 50 | 14
Other property and equipment |  |
Changes in construction work in progress, including capital expenditures and other capital additions, such as capitalized interest |  |
Total capital expenditures | $ 57 | $ 38

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