Subsequent Events	12 Months Ended
Dec. 31, 2019
Subsequent Events
Subsequent Events	Note 23—Subsequent Events Priority guaranteed senior unsecured notes—On January 17, 2020, we issued $750 million aggregate principal amount of 8.00% senior unsecured notes due February 2027 (the “8.00% Senior Notes”), and we received aggregate cash proceeds of $743 million, net of issue costs. The 8.00% Senior Notes are fully and unconditionally guaranteed by Transocean Ltd. and certain wholly owned subsidiaries of Transocean Inc. Such notes rank equal in right of payment to all of our existing and future unsecured unsubordinated obligations and rank structurally senior to the extent of the value of the assets of the subsidiaries guaranteeing the notes. We may redeem all or a portion of the 8.00% Senior Notes on or prior to February 1, 2023 at a price equal to 100 percent of the aggregate principal amount plus a make-whole provision, and subsequently, at specified redemption prices. The indenture that governs the 8.00% Senior Notes contains covenants that, among other things, limit our ability to incur certain liens on our drilling units without equally and ratably securing the notes, engage in certain sale and lease-back transactions covering any of our drilling units, allow our subsidiaries to incur certain additional debt, and consolidate, merge or enter into a scheme of arrangement qualifying as an amalgamation. Debt redemption—On January 17, 2020, we provided a notice to redeem in full our outstanding 9.00% Senior Notes. On February 18, 2020, we made a payment of $767 million, including the make-whole provision, to redeem the 9.00% Senior Notes, and in the three months ending March 31, 2020, we expect to recognize a loss of approximately $66 million associated with the retirement of debt.

Subsequent Events

12 Months Ended

Dec. 31, 2019

Note 23—Subsequent Events

Priority guaranteed senior unsecured notes—On January 17, 2020, we issued $750 million aggregate principal amount of 8.00% senior unsecured notes due February 2027 (the “8.00% Senior Notes”), and we received aggregate cash proceeds of $743 million, net of issue costs. The 8.00% Senior Notes are fully and unconditionally guaranteed by Transocean Ltd. and certain wholly owned subsidiaries of Transocean Inc. Such notes rank equal in right of payment to all of our existing and future unsecured unsubordinated obligations and rank structurally senior to the extent of the value of the assets of the subsidiaries guaranteeing the notes. We may redeem all or a portion of the 8.00% Senior Notes on or prior to February 1, 2023 at a price equal to 100 percent of the aggregate principal amount plus a make-whole provision, and subsequently, at specified redemption prices. The indenture that governs the 8.00% Senior Notes contains covenants that, among other things, limit our ability to incur certain liens on our drilling units without equally and ratably securing the notes, engage in certain sale and lease-back transactions covering any of our drilling units, allow our subsidiaries to incur certain additional debt, and consolidate, merge or enter into a scheme of arrangement qualifying as an amalgamation.

Debt redemption—On January 17, 2020, we provided a notice to redeem in full our outstanding 9.00% Senior Notes. On February 18, 2020, we made a payment of $767 million, including the make-whole provision, to redeem the 9.00% Senior Notes, and in the three months ending March 31, 2020, we expect to recognize a loss of approximately $66 million associated with the retirement of debt.