Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating revenues
Contract drilling services	$ 259,740	$ 373,257	$ 885,931	$ 1,841,321
Reimbursables and other	6,472	11,896	21,399	50,588
Total operating revenues	266,212	385,153	907,330	1,891,909
Operating costs and expenses
Contract drilling services	165,028	207,204	487,784	702,628
Reimbursables	3,834	9,142	13,374	39,446
Depreciation and amortization	137,607	155,242	409,919	455,907
General and administrative	15,331	15,773	49,869	54,346
Loss on impairment	0	0	0	16,616
Total operating costs and expenses	321,800	387,361	960,946	1,268,943
Operating income (loss)	(55,588)	(2,208)	(53,616)	622,966
Other income (expense)
Interest expense, net of amount capitalized	(72,887)	(52,569)	(219,543)	(166,975)
Gain on extinguishment of debt, net	0	0	0	11,066
Interest income and other, net	389	540	4,286	(1,443)
Income (loss) from continuing operations before income taxes	(128,086)	(54,237)	(268,873)	465,614
Income tax benefit (provision)	28,605	10,002	(210,589)	(40,317)
Net income (loss) from continuing operations	(99,481)	(44,235)	(479,462)	425,297
Net loss from discontinued operations, net of tax	0	0	(1,486)	0
Net income (loss)	(99,481)	(44,235)	(480,948)	425,297
Net (income) loss attributable to noncontrolling interests	2,689	(10,846)	(10,888)	(52,027)
Net income (loss) attributable to the company	(96,792)	(55,081)	(491,836)	373,270
Income (loss) from continuing operations	(96,792)	(55,081)	(490,350)	373,270
Net loss from discontinued operations, net of tax	0	0	(1,486)	0
Net income (loss) attributable to the company	$ (96,792)	$ (55,081)	$ (491,836)	$ 373,270
Basic:
Income (loss) from continuing operations (usd per share)	$ (0.40)	$ (0.23)	$ (2.00)	$ 1.48
Loss from discontinued operations (usd per share)	0.00	0.00	(0.01)	0.00
Net income (loss) (usd per share)	(0.40)	(0.23)	(2.01)	1.48
Diluted:
Income (loss) from continuing operations (usd per share)	(0.40)	(0.23)	(2.00)	1.48
Loss from discontinued operations (usd per share)	0.00	0.00	(0.01)	0.00
Net income (loss) (usd per share)	$ (0.40)	$ (0.23)	$ (2.01)	$ 1.48
Noble Corp [Member]
Operating revenues
Contract drilling services	$ 259,740	$ 373,257	$ 885,931	$ 1,841,321
Reimbursables and other	6,472	11,896	21,399	51,288
Total operating revenues	266,212	385,153	907,330	1,892,609
Operating costs and expenses
Contract drilling services	164,568	206,072	486,441	697,596
Reimbursables	3,834	9,142	13,374	39,446
Depreciation and amortization	136,651	155,242	407,002	455,853
General and administrative	9,823	12,033	32,118	36,491
Loss on impairment	0	0	0	16,616
Total operating costs and expenses	314,876	382,489	938,935	1,246,002
Operating income (loss)	(48,664)	2,664	(31,605)	646,607
Other income (expense)
Interest expense, net of amount capitalized	(72,887)	(52,569)	(219,543)	(166,975)
Gain on extinguishment of debt, net	0	0	0	11,066
Interest income and other, net	274	568	4,121	(1,368)
Income (loss) from continuing operations before income taxes	(121,277)	(49,337)	(247,027)	489,330
Income tax benefit (provision)	28,605	9,307	(210,555)	(40,310)
Net income (loss) from continuing operations	(92,672)	(40,030)	(457,582)	449,020
Net loss from discontinued operations, net of tax	0	0	2,967	0
Net income (loss)	(92,672)	(40,030)	(454,615)	449,020
Net (income) loss attributable to noncontrolling interests	2,689	(10,846)	(10,888)	(52,027)
Net income (loss) attributable to the company	(89,983)	(50,876)	(465,503)	396,993
Net income (loss) attributable to the company	$ (89,983)	$ (50,876)	$ (465,503)	$ 396,993