Nature of Business	6 Months Ended
Jun. 30, 2014
Nature of Business
Nature of Business	Note 1—Nature of Business Transocean Ltd. (together with its subsidiaries and predecessors, unless the context requires otherwise, “Transocean,” the “Company,” “we,” “us” or “our”) is a leading international provider of offshore contract drilling services for oil and gas wells. We specialize in technically demanding sectors of the offshore drilling business with a particular focus on deepwater and harsh environment drilling services. Our mobile offshore drilling fleet is considered one of the most versatile fleets in the world. We contract our drilling rigs, related equipment and work crews predominantly on a dayrate basis to drill oil and gas wells. At June 30, 2014, we owned or had partial ownership interests in and operated 77 mobile offshore drilling units associated with our continuing operations. At June 30, 2014, our fleet consisted of 46 High-Specification Floaters (Ultra-Deepwater, Deepwater and Harsh Environment semisubmersibles and drillships), 21 Midwater Floaters, and 10 High-Specification Jackups. At June 30, 2014, we also had nine Ultra-Deepwater drillships and five High-Specification Jackups under construction or under contract to be constructed. See Note 9—Drilling Fleet. In February 2014, in connection with our efforts to discontinue non-strategic operations, we completed the sale of Applied Drilling Technology International Limited (“ADTI”), a United Kingdom (“U.K.”) company, which performs drilling management services in the North Sea. See Note 7—Discontinued Operations.

Note 1—Nature of Business

Transocean Ltd. (together with its subsidiaries and predecessors, unless the context requires otherwise, “Transocean,” the “Company,” “we,” “us” or “our”) is a leading international provider of offshore contract drilling services for oil and gas wells. We specialize in technically demanding sectors of the offshore drilling business with a particular focus on deepwater and harsh environment drilling services. Our mobile offshore drilling fleet is considered one of the most versatile fleets in the world. We contract our drilling rigs, related equipment and work crews predominantly on a dayrate basis to drill oil and gas wells. At June 30, 2014, we owned or had partial ownership interests in and operated 77 mobile offshore drilling units associated with our continuing operations. At June 30, 2014, our fleet consisted of 46 High-Specification Floaters (Ultra-Deepwater, Deepwater and Harsh Environment semisubmersibles and drillships), 21 Midwater Floaters, and 10 High-Specification Jackups. At June 30, 2014, we also had nine Ultra-Deepwater drillships and five High-Specification Jackups under construction or under contract to be constructed. See Note 9—Drilling Fleet.

In February 2014, in connection with our efforts to discontinue non-strategic operations, we completed the sale of Applied Drilling Technology International Limited (“ADTI”), a United Kingdom (“U.K.”) company, which performs drilling management services in the North Sea. See Note 7—Discontinued Operations.