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Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events
Subsequent Events	Note 18—Subsequent Events Assets held for sale—Subsequent to March 31, 2015, in connection with our strategy to reduce our exposure to lower-specification drilling units, we committed to a plan to sell for scrap value the Ultra-Deepwater Floater GSF Explorer along with related equipment.  As a result, in the three months ending June 30, 2015, we expect to recognize a loss, ranging from $100 million to $120 million, net of tax, associated with the impairment of these assets.  After consideration of the impairment, the remaining aggregate carrying amount of the reclassified rig and related equipment was approximately $5 million to $20 million.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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