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Business (Details)	Dec. 31, 2019 item
Number of mobile offshore drilling units	45
Ultra-deepwater floaters
Number of mobile offshore drilling units	28
Number of mobile offshore drilling units under construction	2
Harsh environment floaters
Number of mobile offshore drilling units	14
Midwater floaters
Number of mobile offshore drilling units	3

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- Definition

Number of mobile offshore drilling units.

+ References

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- Definition

Number of mobile offshore drilling units under construction we own, had partial ownership interests in or operated at the measurement date.

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