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Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Investments
Related party receivable	$ 35		$ 26
Related party payable	7		9
Transocean Norge
Investments
Equity method investment payment	$ 6	$ 59
Ownership percentage	33.00%
Aggregate carrying amount of equity investment	$ 166		$ 164
Affiliate costs	5
Transocean Norge | Reimbursements, Agent Fees and Other Receipts
Investments
Related party transaction	$ (5)	$ (13)

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