Noble (NE) 10-Q 2 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document Information [Line Items]
Entity Registrant Name	Noble Corp plc
Trading Symbol	NE
Entity Central Index Key	0001458891
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		249,155,155
Noble Corp
Document Information [Line Items]
Entity Registrant Name	Noble Corporation
Entity Central Index Key	0001169055
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		261,246,693

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 187,093	$ 375,232
Accounts receivable, net	211,729	200,722
Taxes receivable	16,294	20,498
Prepaid expenses and other current assets	45,994	62,604
Total current assets	461,110	659,056
Property and equipment, at cost	11,017,281	10,956,412
Accumulated depreciation	(2,510,699)	(2,475,694)
Property and equipment, net	8,506,582	8,480,718
Other assets	148,622	125,149
Total assets	9,116,314	9,264,923
Current liabilities
Current maturities of long-term debt	300,000	0
Accounts payable	111,044	125,557
Accrued payroll and related costs	34,867	50,284
Taxes payable	26,482	29,386
Interest payable	64,201	100,100
Other current liabilities	59,038	60,130
Total current liabilities	595,632	365,457
Long-term debt	3,550,791	3,877,402
Deferred income taxes	81,009	91,695
Other liabilities	305,074	275,795
Total liabilities	4,532,506	4,610,349
Commitments and contingencies
Shareholders’ equity
Common stock	2,491	2,468
Additional paid-in capital	699,552	699,409
Retained earnings	3,537,477	3,608,366
Accumulated other comprehensive loss	(56,014)	(57,072)
Total shareholders’ equity	4,183,506	4,253,171
Noncontrolling interests	400,302	401,403
Total equity	4,583,808	4,654,574
Total liabilities and equity	9,116,314	9,264,923
Noble Corp
Current assets
Cash and cash equivalents	187,015	374,375
Accounts receivable, net	211,729	200,722
Taxes receivable	16,303	20,498
Prepaid expenses and other current assets	45,601	61,917
Total current assets	460,648	657,512
Property and equipment, at cost	11,017,281	10,956,412
Accumulated depreciation	(2,510,699)	(2,475,694)
Property and equipment, net	8,506,582	8,480,718
Other assets	148,622	125,149
Total assets	9,115,852	9,263,379
Current liabilities
Current maturities of long-term debt	300,000	0
Accounts payable	110,915	125,237
Accrued payroll and related costs	34,867	50,284
Taxes payable	26,482	29,386
Interest payable	64,201	100,100
Other current liabilities	59,038	60,012
Total current liabilities	595,503	365,019
Long-term debt	3,550,791	3,877,402
Deferred income taxes	81,009	91,695
Other liabilities	305,074	275,795
Total liabilities	4,532,377	4,609,911
Commitments and contingencies
Shareholders’ equity
Common stock	26,125	26,125
Additional paid-in capital	650,022	647,082
Retained earnings	3,563,040	3,635,930
Accumulated other comprehensive loss	(56,014)	(57,072)
Total shareholders’ equity	4,183,173	4,252,065
Noncontrolling interests	400,302	401,403
Total equity	4,583,475	4,653,468
Total liabilities and equity	$ 9,115,852	$ 9,263,379

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Mar. 31, 2019	Dec. 31, 2018
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Ordinary shares, shares outstanding	249,150	246,794
Noble Corp
Common stock, par value (usd per share)	$ 0.1	$ 0.1
Ordinary shares, shares outstanding	261,246	261,246

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenues
Revenue from contract with customer	$ 282,888	$ 235,157
Operating costs and expenses
Depreciation and amortization	109,578	128,755
General and administrative	15,999	22,083
Total operating costs and expenses	306,700	292,037
Operating loss	(23,812)	(56,880)
Other income (expense)
Interest expense, net of amounts capitalized	(70,244)	(76,015)
Gain (loss) on extinguishment of debt, net	31,266	(8,768)
Interest income and other, net	2,506	1,339
Loss from continuing operations before income taxes	(60,284)	(140,324)
Income tax provision	(2,865)	(2,996)
Net loss from continuing operations	(63,149)	(143,320)
Net loss from discontinued operations, net of tax	(3,821)	0
Net loss	(66,970)	(143,320)
Net (income) loss attributable to noncontrolling interests	(3,919)	986
Net income (loss) attributable to the company	(70,889)	(142,334)
Net loss from continuing operations	(67,068)	(142,334)
Net loss from discontinued operations, net of tax	$ (3,821)	$ 0
Basic:
Loss from continuing operations (usd per share)	$ (0.27)	$ (0.58)
Loss from discontinued operations (usd per share)	(0.02)	0
Net income (loss) attributable to the company (usd per share)	(0.29)	(0.58)
Diluted:
Loss from continuing operations (usd per share)	(0.27)	(0.58)
Loss from discontinued operations (usd per share)	(0.02)	0
Net income (loss) (usd per share)	$ (0.29)	$ (0.58)
Noble Corp
Operating revenues
Revenue from contract with customer	$ 282,888	$ 235,156
Operating costs and expenses
Depreciation and amortization	108,772	127,639
General and administrative	7,595	13,457
Total operating costs and expenses	296,624	281,852
Operating loss	(13,736)	(46,696)
Other income (expense)
Interest expense, net of amounts capitalized	(70,244)	(76,015)
Gain (loss) on extinguishment of debt, net	31,266	(8,768)
Interest income and other, net	2,506	1,346
Loss from continuing operations before income taxes	(50,208)	(130,133)
Income tax provision	(2,865)	(2,996)
Net loss from continuing operations	(53,073)	(133,129)
Net loss from discontinued operations, net of tax	(3,821)	0
Net loss	(56,894)	(133,129)
Net (income) loss attributable to noncontrolling interests	(3,919)	986
Net income (loss) attributable to the company	(60,813)	(132,143)
Contract drilling services
Operating revenues
Revenue from contract with customer	270,501	229,106
Operating costs and expenses
Cost of services	171,728	136,849
Contract drilling services | Noble Corp
Operating revenues
Revenue from contract with customer	270,501	229,106
Operating costs and expenses
Cost of services	170,862	136,406
Reimbursables and other
Operating revenues
Revenue from contract with customer	12,387	6,051
Operating costs and expenses
Cost of services	9,395	4,350
Reimbursables and other | Noble Corp
Operating revenues
Revenue from contract with customer	12,387	6,050
Operating costs and expenses
Cost of services	$ 9,395	$ 4,350

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net loss	$ (66,970)	$ (143,320)
Other comprehensive income (loss)
Foreign currency translation adjustments	508	667
Amortization of deferred pension plan amounts (net of tax provision of $145 and $87 for the three months ended March 31, 2019 and 2018, respectively)	550	324
Other comprehensive income, net	1,058	991
Net comprehensive (income) loss attributable to noncontrolling interests	(3,919)	986
Comprehensive income (loss) attributable to the company	(69,831)	(141,343)
Noble Corp
Net loss	(56,894)	(133,129)
Other comprehensive income (loss)
Foreign currency translation adjustments	508	667
Foreign currency forward contracts	0	0
Amortization of deferred pension plan amounts (net of tax provision of $145 and $87 for the three months ended March 31, 2019 and 2018, respectively)	550	324
Other comprehensive income, net	1,058	991
Net comprehensive (income) loss attributable to noncontrolling interests	(3,919)	986
Comprehensive income (loss) attributable to the company	$ (59,755)	$ (131,152)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Amortization of deferred pension plan, tax provision	$ 145	$ 87
Noble Corp
Amortization of deferred pension plan, tax provision	$ 145	$ 87

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net loss	$ (66,970)	$ (143,320)
Adjustments to reconcile net loss to net cash flow from operating activities:
Depreciation and amortization	109,578	128,755
(Gain) loss on extinguishment of debt, net	(31,266)	8,768
Deferred income taxes	2,208	(4,906)
Amortization of share-based compensation	2,952	6,282
Other costs, net	(3,264)	3,626
Change in taxes receivable	4,204	84,486
Net changes in other operating assets and liabilities	(58,217)	(28,778)
Net cash provided by (used in) operating activities	(40,775)	54,913
Cash flows from investing activities
Capital expenditures	(96,793)	(33,816)
Proceeds from disposal of assets, net	7,930	117
Net cash used in investing activities	(88,863)	(33,699)
Cash flows from financing activities
Issuance of senior notes	0	750,000
Borrowings on credit facilities	350,000	0
Repayments of debt	(400,000)	(952,209)
Debt issuance costs	(90)	(14,184)
Dividends paid to noncontrolling interests	(5,020)	(2,667)
Taxes withheld on employee stock transactions	(2,763)	(3,305)
Net cash used in financing activities	(57,873)	(222,365)
Net decrease in cash, cash equivalents and restricted cash	(187,511)	(201,151)
Cash, cash equivalents and restricted cash, beginning of period	375,907	662,829
Cash, cash equivalents and restricted cash, end of period	188,396	461,678
Noble Corp
Cash flows from operating activities
Net loss	(56,894)	(133,129)
Adjustments to reconcile net loss to net cash flow from operating activities:
Depreciation and amortization	108,772	127,639
(Gain) loss on extinguishment of debt, net	(31,266)	8,768
Deferred income taxes	2,208	(4,906)
Amortization of share-based compensation	2,940	6,282
Other costs, net	(3,264)	3,626
Change in taxes receivable	4,195	84,486
Net changes in other operating assets and liabilities	(57,373)	(27,869)
Net cash provided by (used in) operating activities	(30,682)	64,897
Cash flows from investing activities
Capital expenditures	(96,793)	(33,816)
Proceeds from disposal of assets, net	7,930	117
Net cash used in investing activities	(88,863)	(33,699)
Cash flows from financing activities
Issuance of senior notes	0	750,000
Borrowings on credit facilities	350,000	0
Repayments of debt	(400,000)	(952,209)
Debt issuance costs	(90)	(14,184)
Dividends paid to noncontrolling interests	(5,020)	(2,667)
Distributions to parent company, net	(12,077)	(13,318)
Net cash used in financing activities	(67,187)	(232,378)
Net decrease in cash, cash equivalents and restricted cash	(186,732)	(201,180)
Cash, cash equivalents and restricted cash, beginning of period	375,050	662,011
Cash, cash equivalents and restricted cash, end of period	$ 188,318	$ 460,831

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Equity - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Noble Corp	Noble CorpCommon Stock	Noble CorpAdditional Paid-in Capital	Noble CorpRetained Earnings	Noble CorpAccumulated Other Comprehensive Income (Loss)	Noble CorpNoncontrolling Interests
Beginning Balance (shares) at Dec. 31, 2017			244,971,000						261,246,000
Beginning Balance at Dec. 31, 2017		$ 5,950,628	$ 2,450	$ 678,922	$ 4,637,677	$ (42,888)	$ 674,467	$ 5,950,014	$ 26,125	$ 623,137	$ 4,669,173	$ (42,888)	$ 674,467
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stranded tax effect resulting from the Tax Cuts and Job Act		(5,540)
Ending Balance (shares) at Jan. 01, 2018			244,971,000						261,246,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment for adopting the revenue recognition standard								(148,393)			(148,393)
Adjustment for adopting the revenue recognition standard | Accounting Standards Update 2016-16		(148,393)			(148,393)
Adjustment for adopting the revenue recognition standard | Accounting Standards Update 2014-09		(1,488)			(1,488)			(1,488)			(1,488)
Beginning Balance (shares) at Dec. 31, 2017			244,971,000						261,246,000
Beginning Balance at Dec. 31, 2017		5,950,628	$ 2,450	678,922	4,637,677	(42,888)	674,467	5,950,014	$ 26,125	623,137	4,669,173	(42,888)	674,467
Employee related equity activity
Amortization of share-based compensation		6,282		6,282
Issuance of share-based compensation shares (in shares)			1,807,000
Issuance of share-based compensation shares		12	$ 14	(2)
Shares withheld for taxes on equity transactions		(3,319)		(3,319)
Distributions to parent company, net								(13,318)			(13,318)
Capital contribution by parent - share-based compensation								6,282		6,282
Net income (loss)		(143,320)			(142,334)		(986)	(133,129)			(132,143)
Dividends paid to noncontrolling interests		(2,667)					(2,667)	(2,667)					(2,667)
Dividend equivalents	[1]	116			116
Other comprehensive income, net		991				991		991				991
Ending Balance (shares) at Mar. 31, 2018			246,778,000						261,246,000
Ending Balance at Mar. 31, 2018		5,658,842	$ 2,464	681,883	4,351,118	(47,437)	670,814	5,658,292	$ 26,125	629,419	4,379,371	(47,437)	670,814
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' equity, adjusted balance		$ 5,800,747	$ 2,450	678,922	4,493,336	(48,428)	674,467	$ 5,800,133	$ 26,125	623,137	4,524,832	(48,428)	674,467
Beginning Balance (shares) at Dec. 31, 2018		246,794,000	246,794,000					261,246,000	261,246,000
Beginning Balance at Dec. 31, 2018		$ 4,654,574	$ 2,468	699,409	3,608,366	(57,072)	401,403	$ 4,653,468	$ 26,125	647,082	3,635,930	(57,072)	401,403
Employee related equity activity
Amortization of share-based compensation		2,952		2,952
Issuance of share-based compensation shares (in shares)			2,356,000
Issuance of share-based compensation shares		0	$ 23	(23)
Shares withheld for taxes on equity transactions		(2,786)		(2,786)
Distributions to parent company, net								(12,077)			(12,077)
Capital contribution by parent - share-based compensation								2,940		2,940
Net income (loss)		(66,970)			(70,889)		3,919	(56,894)			(60,813)
Dividends paid to noncontrolling interests		(5,020)					(5,020)	(5,020)					(5,020)
Other comprehensive income, net		$ 1,058				1,058		$ 1,058				1,058
Ending Balance (shares) at Mar. 31, 2019		249,150,000	249,150,000					261,246,000	261,246,000
Ending Balance at Mar. 31, 2019		$ 4,583,808	$ 2,491	$ 699,552	$ 3,537,477	$ (56,014)	$ 400,302	$ 4,583,475	$ 26,125	$ 650,022	$ 3,563,040	$ (56,014)	$ 400,302
[1]	Activity associated with dividend equivalents, which are related to performance awards granted in 2016, to be paid upon vesting.

Organization and Basis of Prese

Organization and Basis of Presentation	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Note 1— Organization and Basis of Presentation Noble Corporation plc, a public limited company incorporated under the laws of England and Wales (“Noble-UK”), is a leading offshore drilling contractor for the oil and gas industry. We provide contract drilling services with our global fleet of mobile offshore drilling units. As of March 31, 2019 , our fleet consisted of 12 floaters (consisting of four semisubmersibles and eight drillships) and 13 jackups. We report our contract drilling operations as a single reportable segment, Contract Drilling Services, which reflects how we manage our business. The mobile offshore drilling units comprising our offshore rig fleet operate in a global market for contract drilling services and are often redeployed to different regions due to changing demands of our customers, which consist primarily of large, integrated, independent and government-owned or controlled oil and gas companies throughout the world. Noble Corporation, a Cayman Islands company (“Noble-Cayman”), is an indirect, wholly-owned subsidiary of Noble-UK, our publicly-traded parent company. Noble-UK’s principal asset is all of the shares of Noble-Cayman. Noble-Cayman has no public equity outstanding. The condensed consolidated financial statements of Noble-UK include the accounts of Noble-Cayman, and Noble-UK conducts substantially all of its business through Noble-Cayman and its subsidiaries. The accompanying unaudited condensed consolidated financial statements of Noble-UK and Noble-Cayman have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) as they pertain to Quarterly Reports on Form 10-Q. Accordingly, certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The unaudited financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair statement of the financial position and results of operations for the interim periods, on a basis consistent with the annual audited consolidated financial statements. All such adjustments are of a recurring nature. The December 31, 2018 Condensed Consolidated Balance Sheets presented herein are derived from the December 31, 2018 audited consolidated financial statements. These interim financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018 , filed by both Noble-UK and Noble-Cayman. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. Beginning in the first quarter of 2019 , we combined the semisubmersibles and drillships in our contract drilling services fleet into a single category, “floaters” for reporting purposes. We have made certain reclassifications so as to conform to such current period presentation. The reclassification did not have a material effect on our Condensed Consolidated Statements of Operations or related disclosures.

Accounting Pronouncements

Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Pronouncements	Note 2— Accounting Pronouncements Accounting Standards Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02 (Topic 842, “Leases”), as amended, which generally requires lessees to recognize operating and financing lease liabilities and corresponding right-of-use assets on the balance sheet and to provide enhanced disclosures surrounding the amount, time and uncertainty of cash flows arising from lease agreements. We adopted this standard, on a modified retrospective basis, effective January 1, 2019 and will not restate comparative periods. Our adoption did not have a material effect on our condensed consolidated financial statements. With respect to leases in which we are the lessee, we recognized a lease liability and a corresponding right-of-use asset of approximately $28.0 million as of January 1, 2019. We have elected the package of practical expedients that permits us to not reassess (1) whether previously expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, and (3) any initial direct costs for any existing leases as of the effective date. In addition, we have elected the hindsight practical expedient in connection with our adoption of the new lease standard. As lessee, we have made the accounting policy election to not recognize a right-of-use asset lease and lease liability for leases with a term of 12 months or less. We will recognize lease payments in the Consolidated Statements of Operations on a straight-line basis over the lease term. We have also elected the practical expedient to not separate lease and non-lease components. Our drilling contracts contain a lease component related to the underlying drilling equipment, in addition to the service component provided by our crews and our expertise to operate such drilling equipment. We have concluded the non-lease service of operating our equipment and providing expertise in the drilling of the client’s well is predominant in our drilling contracts. We have applied the practical expedient to account for the lease and associated non-lease components as a single component. With the election of the practical expedient, we will continue to present a single performance obligation under the new revenue guidance in Accounting Standards Codification (“ASC”) Topic 606, “Revenue from Contracts with Customers.” Issued Accounting Standards With the exception of the updated standards discussed above, there have been no new accounting pronouncements not yet effective that have significance, or potential significance, to our condensed consolidated financial statements.

Consolidated Joint Ventures

Consolidated Joint Ventures	3 Months Ended
	Mar. 31, 2019
Noncontrolling Interest [Abstract]
Consolidated Joint Ventures	Note 3— Consolidated Joint Ventures We maintain a 50 percent interest in two joint ventures, each with a subsidiary of Royal Dutch Shell plc (“Shell”), that own and operate the two Bully -class drillships. We have determined that we are the primary beneficiary of the joint ventures. Accordingly, we consolidate the entities in our condensed consolidated financial statements after eliminating intercompany transactions. Shell’s equity interests are presented as noncontrolling interests on our Condensed Consolidated Balance Sheets. During the three months ended March 31, 2019 and 2018 , the Bully joint ventures approved and paid dividends totaling $10.0 million and $5.3 million , respectively. Of these amounts, 50 percent was paid to our joint venture partner. The combined carrying amount of the Bully -class drillships at both March 31, 2019 and December 31, 2018 totaled $0.7 billion . These assets were primarily funded through partner equity contributions. Cash held by the Bully joint ventures totaled approximately $42.1 million at March 31, 2019 as compared to approximately $45.2 million at December 31, 2018 .

Loss Per Share

Loss Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Loss Per Share	Note 4— Loss Per Share The following table presents the computation of basic and diluted loss per share for Noble-UK: Three Months Ended March 31, 2019 2018 Numerator: Basic Net loss from continuing operations $ (67,068 ) $ (142,334 ) Net loss from discontinued operations, net of tax (3,821 ) — Net loss attributable to Noble Corporation plc $ (70,889 ) $ (142,334 ) Diluted Net loss from continuing operations $ (67,068 ) $ (142,334 ) Net loss from discontinued operations, net of tax (3,821 ) — Net loss attributable to Noble Corporation plc $ (70,889 ) $ (142,334 ) Denominator: Weighted average shares outstanding - basic 248,251 246,175 Weighted average shares outstanding - diluted 248,251 246,175 Loss per share Basic: Loss from continuing operations $ (0.27 ) $ (0.58 ) Loss from discontinued operations (0.02 ) — Net loss attributable to Noble Corporation plc $ (0.29 ) $ (0.58 ) Diluted: Loss from continuing operations $ (0.27 ) $ (0.58 ) Loss from discontinued operations (0.02 ) — Net loss attributable to Noble Corporation plc $ (0.29 ) $ (0.58 ) Only those items having a dilutive impact on our basic loss per share are included in diluted loss per share. For the three months ended March 31, 2019 and 2018 , approximately 13.2 million and 13.7 million share-based awards, respectively, were excluded from diluted loss per share since the effect would have been anti-dilutive. Share capital As of March 31, 2019 , Noble-UK had approximately 249.2 million shares outstanding and trading as compared to approximately 246.8 million shares outstanding and trading at December 31, 2018 . At our 2019 Annual General Meeting, shareholders approved a proposal to allow our Board of Directors to increase share capital through the issuance of up to approximately 83.1 million ordinary shares (at current nominal value of $0.01 per share). The right of our directors to allot shares will expire at the end of our 2020 Annual General Meeting unless we seek an extension from shareholders at that time. No shares were allotted during the three months ended March 31, 2019 . The declaration and payment of dividends require the authorization of the Board of Directors of Noble-UK, provided that such dividends on issued share capital may be paid only out of Noble-UK’s “distributable reserves” on its statutory balance sheet in accordance with UK law. Therefore, Noble-UK is not permitted to pay dividends out of share capital, which includes share premium. Noble has not paid dividends since the third quarter of 2016. The payment of future dividends will depend on our results of operations, financial condition, cash requirements, future business prospects, contractual and indenture restrictions and other factors deemed relevant by our Board of Directors. Share repurchases Under UK law, the Company is only permitted to purchase its own shares by way of an “off-market purchase” in a plan approved by shareholders. We currently do not have shareholder authority to repurchase shares. During the three months ended March 31, 2019 and 2018, we did not repurchase any of our shares.

Property and Equipment

Property and Equipment	3 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment	Note 5— Property and Equipment Property and equipment, at cost, for Noble-UK consisted of the following: March 31, 2019 December 31, 2018 Drilling equipment and facilities $ 10,497,161 $ 10,546,376 Construction in progress 318,700 209,091 Other 201,420 200,945 Property and equipment, at cost $ 11,017,281 $ 10,956,412 On February 28, 2019, we purchased another GustoMSC CJ46 rig, the Noble Joe Knight. We paid $83.8 million for the rig, with $30.2 million paid in cash and the remaining $53.6 million of the purchase price financed with a loan by the seller, PaxOcean Group (“PaxOcean”). See “ Note 6— Debt ” for additional information.

Debt

Debt	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Debt	Note 6— Debt Credit Facilities 2015 Credit Facility We have a $300 million senior unsecured credit facility that will mature in January 2020 and is guaranteed by our indirect, wholly-owned subsidiaries, Noble Holding (U.S.) LLC (“NHUS”) and Noble Holding International Limited (“NHIL”) (the “2015 Credit Facility”). In January 2018, in connection with entering into the 2017 Credit Facility (as defined herein), we amended the 2015 Credit Facility, which caused, among other things, a reduction in the aggregate principal amount of commitments under the 2015 Credit Facility. As a result of the 2015 Credit Facility’s reduction in the aggregate principal amount of commitments, we recognized a net loss of approximately $2.3 million in the three months ended March 31, 2018. Borrowings under the 2015 Credit Facility bear interest at the London inter-bank offered rate (“LIBOR”) plus an applicable margin, which is currently the maximum contractual rate of 1.65% . At March 31, 2019 , we had $300.0 million of borrowings outstanding under the 2015 Credit Facility. 2017 Credit Facility On December 21, 2017, Noble Cayman Limited, a Cayman Islands company and a wholly-owned indirect subsidiary of Noble-Cayman ; Noble International Finance Company, a Cayman Islands company and a wholly-owned indirect subsidiary of Noble-Cayman ; and Noble Holding UK Limited, a company incorporated under the laws of England and Wales and a wholly-owned direct subsidiary of Noble-UK (“NHUK”), as parent guarantor, entered into a new senior unsecured credit agreement (the “ 2017 Credit Facility” and, together with the 2015 Credit Facility, the “Credit Facilities”). The maximum aggregate amount of commitments under the 2017 Credit Facility is approximately $1.5 billion . Borrowings under the 2017 Credit Facility are subject to certain conditions precedent, including that there be no unused commitments to advance loans under the 2015 Credit Facility. The 2017 Credit Facility will mature in January 2023. Borrowings may be used for working capital and other general corporate purposes. The 2017 Credit Facility provides for a letter of credit sub-facility currently in the amount of $15.0 million , with the ability to increase such amount up to $500.0 million with the approval of the lenders. Borrowing under the 2017 Credit Facility bear interest at LIBOR plus an applicable margin, which is currently the maximum contractual rate of 4.25% . At March 31, 2019 , we had $50.0 million of borrowings outstanding under the 2017 Credit Facility, plus $3.4 million of performance letters of credit. Both of our Credit Facilities have provisions which vary the applicable interest rates for borrowings based upon our debt ratings. We also pay a facility fee under the 2015 Credit Facility on the full commitments thereunder (used or unused) and a commitment fee under the 2017 Credit Facility on the daily unused amount of the underlying commitments, in each case which varies depending on our credit ratings. At March 31, 2019 , the interest rates and fees in effect under our Credit Facilities were the highest permitted interest rates under those agreements. Debt Issuance In January 2018, we issued $750.0 million aggregate principal amount of our Senior Notes due 2026 (the “ 2026 Notes”) through our indirect wholly-owned subsidiary, NHIL. The net proceeds of the offering of approximately $737.4 million , after expenses, were used to retire a portion of our near-term senior notes in a related tender offer. The indenture for the 2026 Notes contains certain covenants and restrictions, including, among others, restrictions on our subsidiaries’ ability to incur certain additional indebtedness. Additionally, the subsidiary guarantors must own, directly or indirectly, (i) assets comprising at least 85% of the revenue of Noble-Cayman and its subsidiaries on a consolidated basis and (ii) jackups, semisubmersibles, drillships, submersibles or other mobile offshore drilling units of material importance, the combined book value of which comprises at least 85% of the combined book value of all such assets of Noble-Cayman and its subsidiaries on a consolidated basis, in each case, with respect to the most recently completed fiscal year. Seller Loans 2019 Seller Loan In February 2019, we purchased the Noble Joe Knight for $83.8 million with a $53.6 million seller-financed secured loan (the “2019 Seller Loan”). The 2019 Seller Loan has a term of four years and requires a 5% principal payment at the end of the third year with the remaining 95% of the principal due at the end of the term. The 2019 Seller Loan bears a cash interest rate of 4.25% and the equivalent of a 1.25% interest rate paid-in-kind over the four -year term of the 2019 Seller Loan. Based on the terms of the 2019 Seller Loan, the 1.25% paid-in-kind interest rate is accelerated into the first year, resulting in an overall first year interest rate of 8.91% , of which only 4.25% is payable in cash. Thereafter, the paid-in-kind interest ends and the cash interest rate of 4.25% is payable for the remainder of the term. 2018 Seller Loan In September 2018, we purchased the Noble Johnny Whitstine for $93.8 million with a $60.0 million seller-financed secured loan (the “2018 Seller Loan” and, together with the 2019 Seller Loan, the “Seller Loans”). The 2018 Seller Loan has a term of four years and requires a 5% principal payment at the end of the third year with the remaining 95% of the principal due at the end of the term. The 2018 Seller Loan bears a cash interest rate of 4.25% and the equivalent of a 1.25% interest rate paid-in-kind over the four -year term of the 2018 Seller Loan. Based on the terms of the 2018 Seller Loan, the 1.25% paid-in-kind interest rate is accelerated into the first year, resulting in an overall first year interest rate of 8.91% , of which only 4.25% is payable in cash. Thereafter, the paid-in-kind interest ends and the cash interest rate of 4.25% is payable for the remainder of the term. Both of the Seller Loans are guaranteed by Noble-Cayman and each is secured by a mortgage on the applicable rig and by the pledge of the shares of the applicable single-purpose entity that owns the relevant rig. Each Seller Loan contains debt to total capitalization ratio and minimum liquidity financial covenants substantially similar to the 2017 Credit Facility, and an asset and revenue covenant substantially similar to the 2026 Notes as well as other covenants and provisions customarily found in secured transactions, including a cross default provision. Each Seller Loan requires immediate repayment on the occurrence of certain events, including the termination of the drilling contract associated with the relevant rig. Senior Notes Interest Rate Adjustments Our Senior Notes due 2025 and our Senior Notes due 2045 are subject to provisions that vary the applicable interest rates based on our debt rating. Effective April 2018, these senior notes have reached the contractually defined maximum interest rate set for each rating agency and no further interest rate increases are possible. The interest rates on these senior notes may be decreased if our debt ratings were to be raised by either rating agency above specified levels. Our other outstanding senior notes do not contain provisions varying applicable interest rates based upon our credit ratings. Debt Tender Offers, Repayments, and Open Market Repurchases In March 2019, we completed cash tender offers for our Senior Notes due 2020 (the “2020 Notes”), Senior Notes due 2021 (the “2021 Notes”), Senior Notes due 2022 (the “2022 Notes”) and Senior Notes due 2024 (the “2024 Notes”). Pursuant to such tender offers, we purchased $440.9 million aggregate principal amount of these senior notes for $400.0 million , plus accrued interest, using cash on hand and borrowings under the 2015 Credit Facility. As a result of this transaction, we recognized a net gain of approximately $31.3 million . In October 2018, we purchased $27.4 million aggregate principal amount of various tranches of our senior notes for approximately $20.2 million , plus accrued interest, as open market repurchases and recognized a net gain of approximately $6.9 million . In August 2018, we purchased $0.4 million aggregate principal amount of our Senior Notes due 2042 for approximately $0.3 million , plus accrued interest, as open market repurchases and recognized a net gain of approximately $0.1 million . In March 2018, we repaid the remaining aggregate principal amount of $126.6 million of our Senior Notes due 2018 (the “2018 Notes”) at maturity using cash on hand. In March 2018, we purchased $9.5 million aggregate principal amount of various tranches of our senior notes for approximately $8.7 million , plus accrued interest, as open market repurchases and recognized a net gain of approximately $0.5 million . In February 2018, we redeemed the remaining principal amount of $61.9 million of our Senior Notes due 2019 (the “2019 Notes”) for approximately $65.3 million , plus accrued interest. As a result of this transaction, we recognized a net loss of approximately $3.5 million . In February 2018, we completed cash tender offers for the 2018 Notes, the 2019 Notes, the 2020 Notes, the 2021 Notes, the 2022 Notes and the 2024 Notes. Pursuant to such tender offers, we purchased $754.2 million aggregate principal amount of these senior notes for $750.0 million , plus accrued interest, using the net proceeds of the 2026 Notes issuance and cash on hand. As a result of this transaction, we recognized a net loss of approximately $3.5 million . Covenants The 2017 Credit Facility contains certain financial covenants applicable to NHUK and its subsidiaries, including (i) a covenant restricting debt to total tangible capitalization to not greater than 0.55 at the end of each fiscal quarter, (ii) a minimum Liquidity requirement of $300.0 million , (iii) a covenant that, beginning with the fiscal quarter ending March 31, 2018, the ratio of the Rig Value (as defined in the 2017 Credit Facility) of Marketed Rigs (as defined in the 2017 Credit Facility) to the sum of commitments under the 2017 Credit Facility plus indebtedness for borrowed money of the borrowers and guarantors, in each case, that directly own Marketed Rigs, is not less than 3:00 to 1:00 at the end of each fiscal quarter and (iv) a covenant that, beginning with the fiscal quarter ending March 31, 2018, the ratio of (A) the Rig Value of the Closing Date Rigs (as defined in the 2017 Credit Facility) that are directly wholly owned by the borrowers and guarantors to (B) the Rig Value of the Closing Date Rigs owned by NHUK, subsidiaries of NHUK and certain local content affiliates, is not less than 80% at the end of each fiscal quarter (such covenants described in (iii) and (iv) of this paragraph, the “Guarantor Ratio Covenants”). The 2017 Credit Facility also includes restrictions on borrowings if, after giving effect to any such borrowings and the application of the proceeds thereof, the aggregate amount of Available Cash (as defined in the 2017 Credit Facility) would exceed $200.0 million . NHUK has guaranteed the obligations of the borrowers under the 2017 Credit Facility. In addition, certain indirect subsidiaries of Noble-UK that own rigs are guarantors under the 2017 Credit Facility. Certain other subsidiaries of Noble-UK may be required from time to time to guarantee the obligations of the borrowers under the 2017 Credit Facility in order maintain compliance with the Guarantor Ratio Covenants. The 2017 Credit Facility contains additional restrictive covenants generally applicable to NHUK and its subsidiaries, including restrictions on the incurrence of liens and indebtedness, mergers and other fundamental changes, restricted payments, repurchases and redemptions of indebtedness with maturities outside of the maturity of the 2017 Credit Facility, sale and leaseback transactions and transactions with affiliates. The 2015 Credit Facility is guaranteed by NHUS and NHIL. The 2015 Credit Facility contains a covenant that limits our ratio of debt to total tangible capitalization, as defined in the 2015 Credit Facility, to 0.60 at the end of each fiscal quarter. In addition to the covenants from the Credit Facilities noted above, the covenants from the 2026 Notes described under “—Debt Issuance” above, and the covenants from the Seller Loans described under “—Seller Loans” above, the indentures governing our outstanding senior unsecured notes contain covenants that place restrictions on certain merger and consolidation transactions, unless we are the surviving entity or the other party assumes the obligations under the indenture, and on the ability to sell or transfer all or substantially all of our assets. There are also restrictions on incurring or assuming certain liens and on entering into sale and lease-back transactions. At March 31, 2019 , our debt to total tangible capitalization ratio under our 2017 Credit Facility was approximately 0.48 and we were in compliance with all applicable debt covenants. We continually monitor compliance with the covenants under our Credit Facilities, senior notes and Seller Loans and expect to remain in compliance throughout 2019 . Fair Value of Debt Fair value represents the amount at which an instrument could be exchanged in a current transaction between willing parties. The estimated fair value of our debt instruments was based on the quoted market prices for similar issues or on the current rates offered to us for debt of similar remaining maturities (Level 2 measurement). The carrying amount of the Credit Facilities approximates fair value as the interest rates are variable and reflective of market rates. All remaining fair value disclosures are presented in “ Note 12— Fair Value of Financial Instruments .” The following table presents the carrying value, net of unamortized debt issuance costs and discounts, and the estimated fair value of our total debt, not including the effect of unamortized debt issuance costs, respectively: March 31, 2019 December 31, 2018 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Senior unsecured notes: 4.90% Senior Notes due August 2020 $ 62,468 $ 60,066 $ 65,810 $ 60,177 4.625% Senior Notes due March 2021 79,803 77,696 92,967 84,931 3.95% Senior Notes due March 2022 21,171 19,213 41,617 37,096 7.75% Senior Notes due January 2024 388,710 358,561 783,350 613,719 7.95% Senior Notes due April 2025 446,626 388,917 446,517 339,035 7.875% Senior Notes due February 2026 738,389 699,773 738,075 647,085 6.20% Senior Notes due August 2040 390,472 251,079 390,454 245,242 6.05% Senior Notes due March 2041 389,722 250,770 389,693 247,171 5.25% Senior Notes due March 2042 478,028 293,770 477,996 277,056 8.95% Senior Notes due April 2045 390,694 316,960 390,672 311,392 Seller loans: Seller-financed secured loan due September 2022 60,983 59,363 60,251 57,902 Seller-financed secured loan due February 2023 53,725 50,516 — — Credit facilities: 2015 Credit Facility matures January 2020 300,000 300,000 — — 2017 Credit Facility matures January 2023 50,000 50,000 — — Total debt 3,850,791 3,176,684 3,877,402 2,920,806 Less: Current maturities of long-term debt (300,000 ) (300,000 ) — — Long-term debt $ 3,550,791 $ 2,876,684 $ 3,877,402 $ 2,920,806

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 7— Accumulated Other Comprehensive Income (Loss) The following table presents the changes in the accumulated balances for each component of “Accumulated other comprehensive income (loss)” (“AOCI”) for the three months ended March 31, 2019 and 2018 . All amounts within the table are shown net of tax. Defined Benefit Pension Items (1) Foreign Currency Items Total Balance at December 31, 2017 $ (27,603 ) $ (15,285 ) $ (42,888 ) Activity during period: Stranded tax effect resulting from the Tax Cuts and Jobs Act (5,540 ) — (5,540 ) Balance at January 1, 2018 (33,143 ) (15,285 ) (48,428 ) Activity during period: Other comprehensive income before reclassifications — 667 667 Amounts reclassified from AOCI 324 — 324 Net other comprehensive income 324 667 991 Balance at March 31, 2018 $ (32,819 ) $ (14,618 ) $ (47,437 ) Balance at December 31, 2018 $ (39,058 ) $ (18,014 ) $ (57,072 ) Activity during period: Other comprehensive loss before reclassifications — 508 508 Amounts reclassified from AOCI 550 — 550 Net other comprehensive income (loss) 550 508 1,058 Balance at March 31, 2019 $ (38,508 ) $ (17,506 ) $ (56,014 ) (1) Defined benefit pension items relate to actuarial changes. Reclassifications from AOCI are recognized as expense on our Condensed Consolidated Statements of Operations through “General and administrative.” See “ Note 11— Employee Benefit Plans ” for additional information.

Revenue and Customers

Revenue and Customers	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue and Customers	Note 8— Revenue and Customers Contract Balances Accounts receivable are recognized when the right to consideration becomes unconditional based upon contractual billing schedules. Payment terms on invoiced amounts are typically 30 days. Current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Other current liabilities,” respectively, and noncurrent contract assets and liabilities are included in “Other assets” and “Other liabilities,” respectively, on our Condensed Consolidated Balance Sheets. The following table provides information about contract assets and contract liabilities from contracts with customers: March 31, 2019 December 31, 2018 Current contract assets $ 20,824 $ 25,298 Noncurrent contract assets 18,438 22,366 Total contract assets 39,262 47,664 Current contract liabilities (deferred revenue) (29,325 ) (32,906 ) Noncurrent contract liabilities (deferred revenue) (42,939 ) (47,847 ) Total contract liabilities $ (72,264 ) $ (80,753 ) Significant changes in the remaining performance obligation contract assets and the contract liabilities balances for the three months ended March 31, 2019 are as follows: Contract Assets Contract Liabilities Net balance at December 31, 2018 $ 47,664 $ (80,753 ) Amortization of deferred costs (8,775 ) — Additions to deferred costs 373 — Amortization of deferred revenue — 9,355 Additions to deferred revenue — (866 ) Total (8,402 ) 8,489 Net balance at March 31, 2019 $ 39,262 $ (72,264 ) Transaction Price Allocated to the Remaining Performance Obligations The following table reflects revenue expected to be recognized in the future related to unsatisfied performance obligations, by rig type, at the end of the reporting period: Three Months Ended March 31, 2019 2019 2020 2021 2022 2023 and beyond Total Floaters $ 15,598 $ 16,073 $ 15,757 $ 9,255 $ 3,568 $ 60,251 Jackups 8,352 3,661 — — — 12,013 Total $ 23,950 $ 19,734 $ 15,757 $ 9,255 $ 3,568 $ 72,264 The revenue included above consists of expected mobilization, demobilization, and upgrade revenue for unsatisfied performance obligations. The amounts are derived from the specific terms within drilling contracts that contain such provisions, and the expected timing for recognition of such revenue is based on the estimated start date and duration of each respective contract based on information known at March 31, 2019 . The actual timing of recognition of such amounts may vary due to factors outside of our control. We have taken the optional exemption, permitted by accounting standards, to exclude disclosure of the estimated transaction price related to the variable portion of unsatisfied performance obligations at the end of the reporting period, as our transaction price is based on a single performance obligation consisting of a series of distinct hourly, or more frequent, periods, the variability of which will be resolved at the time of the future services. Disaggregation of Revenue The following table provides information about contract drilling revenue by rig types: Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 Floaters $ 153,154 120,636 Jackups 117,347 108,470 Total $ 270,501 $ 229,106

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	Note 9— Leases Leases We determine if an arrangement is a lease at inception. Our operating lease agreements are primarily for real estate, equipment, storage, dock space and automobiles and are included within “Other current liabilities,” “Other assets” and “Other liabilities,” respectively, on our Condensed Consolidated Balance Sheets. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. Certain of our lease agreements include options to extend or terminate the lease, which we do not include in our minimum lease terms unless management is reasonably certain to exercise. Supplemental balance sheet information related to leases was as follows: March 31, 2019 Operating Leases Operating lease right-of-use assets $ 28,272 Current operating lease liabilities 4,396 Long-term operating lease liabilities $ 23,243 Weighted average remaining lease term for operating leases (years) 9.1 Weighted average discounted rate for operating leases 9.6 % The components of lease cost were as follows: March 31, 2019 Operating lease cost $ 1,859 Short-term lease cost 2,052 Variable lease cost 529 Total lease cost $ 4,440 Supplemental cash flow information related to leases was as follows: March 31, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 2,200 Maturities of lease liabilities as of March 31, 2019 were as follows: Operating Leases 2019 $ 4,814 2020 5,917 2021 4,448 2022 3,618 2023 3,250 Thereafter 22,335 Total lease payments 44,382 Less: Interest (16,743 ) Present value of lease liability $ 27,639

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Note 10— Income Taxes At March 31, 2019 , the reserves for uncertain tax positions totaled $195.1 million (net of related tax benefits of $1.0 million ). At December 31, 2018 , the reserves for uncertain tax positions totaled $183.8 million (net of related tax benefits of $1.0 million ). It is reasonably possible that our existing liabilities related to our reserve for uncertain tax positions may fluctuate in the next 12 months primarily due to the completion of open audits or the expiration of statutes of limitation. However, we cannot reasonably estimate a range of changes in our existing liabilities due to various uncertainties, such as the unresolved nature of various audits.

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Employee Benefit Plans	Note 11— Employee Benefit Plans Pension costs include the following components for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 Non-U.S. U.S. Non-U.S. U.S. Interest cost $ 445 $ 2,178 $ 465 $ 2,045 Return on plan assets (634 ) (2,578 ) (716 ) (2,979 ) Recognized net actuarial gain 3 692 — 411 Net pension benefit cost (gain) $ (186 ) $ 292 $ (251 ) $ (523 ) During the three months ended March 31, 2019 and 2018 , we made no contributions to our pension plans. Effective December 31, 2016, employees and alternate payees accrue no future benefits under the U.S. plans and, as such, Noble recognized no service costs with the plans for the three months ended March 31, 2019 and 2018 .

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 12— Fair Value of Financial Instruments The following tables present the carrying amount and estimated fair value of our financial instruments recognized at fair value on a recurring basis: March 31, 2019 Estimated Fair Value Measurements Carrying Amount Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets - Marketable securities $ 7,359 $ 7,359 $ — $ — December 31, 2018 Estimated Fair Value Measurements Carrying Amount Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets - Marketable securities $ 8,659 $ 8,659 $ — $ — Our cash, cash equivalents and restricted cash, accounts receivable, marketable securities and accounts payable are by their nature short-term. As a result, the carrying values included in our Condensed Consolidated Balance Sheets approximate fair value.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 13— Commitments and Contingencies Transocean Ltd. In January 2017, a subsidiary of Transocean Ltd. (“Transocean”) filed suit against us and certain of our subsidiaries for patent infringement in a Texas federal court and Transocean later added another claim alleging that we breached a 2007 settlement agreement we entered into with Transocean relating to patent claims in respect of another Noble rig. The suit claims that five of our newbuild rigs that operated in the U.S. Gulf of Mexico violated Transocean patents relating to what is generally referred to as dual-activity drilling. We were aware of the patents when we constructed the rigs. The patents are now expired in the United States and most other countries. While there is inherent risk in litigation, we do not believe that our rigs infringe the Transocean patents or that there has been any breach of the 2007 agreement. The litigation continues, and the court has set a trial date in November 2019. We continue to defend ourselves vigorously against this claim. Brazil commercial agent We previously used a commercial agent in Brazil in connection with our Petróleo Brasileiro S.A. (“Petrobras”) drilling contracts. This agent represented a number of different companies in Brazil over many years, including several offshore drilling contractors. In November 2015, this agent pled guilty in Brazil in connection with the award of a drilling contract to a competitor and implicated a Petrobras official as part of a wider investigation of Petrobras’ business practices. Following news reports relating to the agent’s involvement in the Brazil investigation in connection with his activities with other companies, we conducted a review, which was substantially completed in 2017, of our relationship with the agent and with Petrobras. We have been in contact and cooperated with the SEC, the Brazilian federal prosecutor’s office and the U.S. Department of Justice (“DOJ”) about this matter and in December 2018, the SEC and the DOJ each advised us that they had closed their file on this matter. We have remained in contact with the Brazilian federal prosecutor’s office, who is aware of our internal review, and continue to cooperate with any questions or requests they may have. To our knowledge, neither the agent, nor the government authorities investigating the matter, has alleged that the agent or Noble acted improperly in connection with our contracts with Petrobras. Paragon Offshore On August 1, 2014, Noble-UK completed the separation and spin-off of a majority of its standard specification offshore drilling business (the “Spin-off”) through a pro rata distribution of all of the ordinary shares of its wholly-owned subsidiary, Paragon Offshore plc (“Paragon Offshore”), to the holders of Noble’s ordinary shares. In February 2016, Paragon Offshore sought approval of a pre-negotiated plan of reorganization (the “Prior Plan”) by filing for voluntary relief under Chapter 11 of the United States Bankruptcy Code. As part of the Prior Plan, we entered into a settlement agreement with Paragon Offshore (the “Settlement Agreement”). The Prior Plan was rejected by the bankruptcy court in October 2016. In April 2017, Paragon Offshore filed a revised plan of reorganization (the “New Plan”) in its bankruptcy proceeding. Under the New Plan, Paragon Offshore no longer needed the Mexican tax bonding that Noble-UK was to provide under the Settlement Agreement. Consequently, Paragon Offshore abandoned the Settlement Agreement as part of the New Plan, and the Settlement Agreement was terminated at the time of the filing of the New Plan. On May 2, 2017, Paragon Offshore announced that it had reached an agreement in principle with both its secured and unsecured creditors to revise the New Plan to, among other things, create and fund a $10.0 million litigation trust to pursue litigation against us. On June 7, 2017, the revised New Plan was approved by the bankruptcy court, and Paragon Offshore emerged from bankruptcy on July 18, 2017. On December 15, 2017, the litigation trust filed claims relating to the Spin-off against us and certain of our current and former officers and directors in the Delaware bankruptcy court that heard Paragon Offshore’s bankruptcy. The complaint alleges claims of alleged actual and constructive fraudulent conveyance, unjust enrichment and recharacterization of intercompany notes as equity claims against Noble and claims of breach of fiduciary duty and aiding and abetting breach of fiduciary duty against the officer and director defendants. The complaint states that the litigation trust is seeking damages of approximately $1.7 billion from the Company, an amount equal to the amount borrowed by Paragon Offshore immediately prior to the Spin-off, as well as unspecified amounts in respect of the claims against the officer and director defendants all of whom have indemnification arrangements with us. Discovery continues and the court has approved a litigation schedule, which could result in all pre-trial activity being completed during the second quarter of 2020. A trial date has not yet been set. We believe that Paragon Offshore, at the time of the Spin-off, was properly funded, solvent and had appropriate liquidity and that the claims brought by the litigation trust are without merit. We intend to defend ourselves vigorously. However, there is inherent risk and substantial expense in litigation, and the amount of damages the plaintiff is seeking is substantial. If any of the litigation trust’s claims are successful, or if we elect to settle any claims (in part to reduce or eliminate the ongoing cost of defending the litigation and eliminate any risk of a larger judgment against us), any damages or other amounts we would be required to or agree to pay could be substantial and could have a material adverse effect on our business, financial condition and results of operations. Because of our view of the merits of the claims and the significant discovery still to be conducted in the litigation, we are not currently able to make a reasonable estimation of the amount of possible loss we may incur, if any. Subsequent developments in the litigation may make such an estimation possible, in which case we may record a charge against our income when a loss is reasonably estimable. This may occur even though the litigation may still be ongoing. Any charge could be material and could have a material adverse effect on our financial condition and results of operations. It may also be materially different than any amount we are required to pay once the litigation is concluded. We have directors’ and officers’ indemnification coverage for the officers and directors who have been sued by the litigation trust. The insurers have accepted coverage for the director and officer claims and we are continuing to discuss with them the scope of their reimbursement of litigation expenses. In addition, at the time of the Spin-off, we had entity coverage, or “Side C” coverage, which was meant to cover certain litigation claims up to the coverage limit of $150.0 million , including litigation expenses. We have made a claim for coverage of the litigation trust’s claims against Noble under such entity insurance. The insurers have rejected coverage for these claims. We cannot predict the amount of claims and expenses we may incur, pay or settle in the Paragon Offshore litigation that such insurance will cover, if any. Prior to the completion of the Spin-off, Noble-UK and Paragon Offshore entered into a series of agreements to effect the separation and Spin-off and govern the relationship between the parties after the Spin-off (the “Separation Agreements”), including the MSA and a Tax Sharing Agreement (the “TSA”). As part of its final bankruptcy plan, Paragon Offshore rejected the Separation Agreements. Accordingly, the indemnity obligations that Paragon Offshore potentially would have owed us under the Separation Agreements have now terminated, including indemnities arising under the MSA and the TSA in respect of obligations related to Paragon Offshore’s business that were incurred through Noble-retained entities prior to the Spin-off. Likewise, any potential indemnity obligations that we would have owed Paragon Offshore under the Separation Agreements, including those under the MSA and the TSA in respect of Noble-UK’s business that was conducted prior to the Spin-off through Paragon Offshore-retained entities, are now also extinguished. In the absence of the Separation Agreements, liabilities relating to the respective parties will be borne by the owner of the legal entity or asset at issue and neither party will look to an allocation based on the historic relationship of an entity or asset to one of the party’s business, as had been the case under the Separation Agreements. The rejection and ultimate termination of the indemnity and related obligations under the Separation Agreements resulted in a number of accounting charges and benefits during the year ended December 31, 2017, and such termination may continue to affect us in the future as liabilities arise for which we would have been indemnified by Paragon Offshore or would have had to indemnify Paragon Offshore. We do not expect that, overall, the rejection of the Separation Agreements by Paragon Offshore will have a material adverse effect on our financial condition or liquidity. However, any loss we experience with respect to which we would have been able to secure indemnification from Paragon Offshore under one or more of the Separation Agreements could have an adverse impact on our results of operations in any period, which impact may be material depending on our results of operations during this down-cycle. During the three months ended March 31, 2019 , we recognized charges of $3.8 million recorded in “Net loss from discontinued operations, net of tax” on our Condensed Consolidated Statement of Operations relating to settlement of Mexico customs audits from rigs included in the Spin-off. Tax matters During 2014 , the Internal Revenue Service (“IRS”) began its examination of our tax reporting in the U.S. for the taxable years ended December 31, 2010 and 2011 . The IRS examination team has completed its examination of our 2010 and 2011 U.S. tax returns and proposed adjustments and deficiencies with respect to certain items that were reported by us for the 2010 and 2011 tax year. On December 19, 2016, we received the Revenue Agent Report from the IRS. We believe that we have accurately reported all amounts in our tax returns, and have submitted administrative protests with the IRS Office of Appeals contesting the examination team’s proposed adjustments. We intend to vigorously defend our reported positions, and believe the ultimate resolution of the adjustments proposed by the IRS examination team will not have a material adverse effect on our condensed consolidated financial statements. During the third quarter of 2017, the IRS initiated its examination of our 2012 , 2013 , 2014 and 2015 tax returns. Audit claims of approximately $51.9 million attributable to income and other business taxes have been assessed against Noble entities in Mexico related to tax years 2005 and 2007. We intend to vigorously defend our reported positions, and believe the ultimate resolution of the audit claims will not have a material adverse effect on our consolidated financial statements. We operate in a number of countries throughout the world and our tax returns filed in those jurisdictions are subject to review and examination by tax authorities within those jurisdictions. We recognize uncertain tax positions that we believe have a greater than 50 percent likelihood of being sustained. We cannot predict or provide assurance as to the ultimate outcome of any existing or future assessments. Other contingencies We have entered into agreements with certain of our executive officers, as well as certain other employees. These agreements become effective upon a change of control of Noble-UK (within the meaning set forth in the agreements) or a termination of employment in connection with or in anticipation of a change of control, and remain effective for three years thereafter. These agreements provide for compensation and certain other benefits under such circumstances. We are a defendant in certain claims and litigation arising out of operations in the ordinary course of business, including personal injury claims, the resolution of which, in the opinion of management, will not be material to our financial position, results of operations or cash flows. There is inherent risk in any litigation or dispute and no assurance can be given as to the outcome of these claims.

Supplemental Financial Informat

Supplemental Financial Information	3 Months Ended
	Mar. 31, 2019
Supplemental Financial Information [Abstract]
Supplemental Financial Information	Note 14— Supplemental Financial Information Condensed Consolidated Balance Sheets Information Our restricted cash balance as of March 31, 2019 and December 31, 2018 consisted of $1.3 million and $0.7 million , respectively, and is included in “Prepaid expenses and other current assets.” Condensed Consolidated Statements of Cash Flows Information Operating cash activities The net effect of changes in other assets and liabilities on cash flows from operating activities is as follows: Noble-UK Noble-Cayman Three Months Ended March 31, Three Months Ended March 31, 2019 2018 2019 2018 Accounts receivable $ (11,007 ) $ 22,892 $ (11,007 ) $ 22,892 Other current assets 17,097 9,986 16,803 9,699 Other assets 3,700 (11,668 ) 4,506 (10,552 ) Accounts payable (1,867 ) 6,175 (1,676 ) 6,175 Other current liabilities (59,685 ) (58,860 ) (59,544 ) (58,780 ) Other liabilities (6,455 ) 2,697 (6,455 ) 2,697 Total net change in assets and liabilities $ (58,217 ) $ (28,778 ) $ (57,373 ) $ (27,869 ) Non-cash investing and financing activities Additions to property and equipment, at cost for which we had accrued a corresponding liability in accounts payable as of March 31, 2019 and December 31, 2018 were $38.5 million and $52.1 million , respectively. Additions to property and equipment, at cost for which we had accrued a corresponding liability in accounts payable as of March 31, 2018 and December 31, 2017 were $29.6 million and $25.5 million , respectively. In February 2019, we entered into the $53.6 million 2019 Seller Loan to finance a portion of the purchase price for the Noble Joe Knight. See “ Note 6— Debt ” for additional information.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	3 Months Ended
	Mar. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Consolidating Financial Information	Note 15— Condensed Consolidating Financial Information Guarantees of Registered Securities Noble-Cayman, or one or more 100 percent owned subsidiaries of Noble-Cayman, is an issuer, co-issuer or full and unconditional guarantor or otherwise obligated as of March 31, 2019 with respect to registered securities as follows (see “ Note 6— Debt ” for additional information): Issuer Notes (1) (Co-Issuer(s)) Guarantor 4.90% Senior Notes due 2020 NHIL Noble-Cayman 4.625% Senior Notes due 2021 NHIL Noble-Cayman 3.95% Senior Notes due 2022 NHIL Noble-Cayman 7.75% Senior Notes due 2024 NHIL Noble-Cayman 7.95% Senior Notes due 2025 NHIL Noble-Cayman 6.20% Senior Notes due 2040 NHIL Noble-Cayman 6.05% Senior Notes due 2041 NHIL Noble-Cayman 5.25% Senior Notes due 2042 NHIL Noble-Cayman 8.95% Senior Notes due 2045 NHIL Noble-Cayman (1) Our 2026 Notes are excluded from this list as they are unregistered securities issued in a non-public offering. The following condensed consolidating financial statements of Noble-Cayman, NHIL and all other subsidiaries present investments in both consolidated and unconsolidated affiliates using the equity method of accounting. NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET March 31, 2019 (in thousands) (Unaudited) Noble - NHIL Other Consolidating Total ASSETS Current assets Cash and cash equivalents $ 1 $ — $ 187,014 $ — $ 187,015 Accounts receivable — — 211,729 — 211,729 Taxes receivable — — 16,303 — 16,303 Accounts receivable from affiliates 743,538 61,045 5,113,199 (5,917,782 ) — Prepaid expenses and other current assets 468 — 45,133 — 45,601 Total current assets 744,007 61,045 5,573,378 (5,917,782 ) 460,648 Property and equipment, at cost — — 11,017,281 — 11,017,281 Accumulated depreciation — — (2,510,699 ) — (2,510,699 ) Property and equipment, net — — 8,506,582 — 8,506,582 Notes receivable from affiliates 5,145 — 43,000 (48,145 ) — Investments in affiliates 7,656,540 8,787,194 — (16,443,734 ) — Other assets — — 148,622 — 148,622 Total assets $ 8,405,692 $ 8,848,239 $ 14,271,582 $ (22,409,661 ) $ 9,115,852 LIABILITIES AND EQUITY Current liabilities Current maturities of long-term debt 300,000 — — — 300,000 Accounts payable 39 63 110,813 — 110,915 Accrued payroll and related costs — — 34,867 — 34,867 Accounts payable to affiliates 3,901,507 1,211,694 804,581 (5,917,782 ) — Taxes payable — — 26,482 — 26,482 Interest payable 1,044 60,170 2,987 — 64,201 Other current liabilities — — 59,038 — 59,038 Total current liabilities 4,202,590 1,271,927 1,038,768 (5,917,782 ) 595,503 Long-term debt — 3,386,083 164,708 — 3,550,791 Notes payable to affiliates — 43,000 5,145 (48,145 ) — Deferred income taxes — — 81,009 — 81,009 Other liabilities 19,929 — 285,145 — 305,074 Total liabilities 4,222,519 4,701,010 1,574,775 (5,965,927 ) 4,532,377 Commitments and contingencies Shareholders’ equity 4,183,173 4,147,229 12,296,505 (16,443,734 ) 4,183,173 Noncontrolling interests — — 400,302 — 400,302 Total equity 4,183,173 4,147,229 12,696,807 (16,443,734 ) 4,583,475 Total liabilities and equity $ 8,405,692 $ 8,848,239 $ 14,271,582 $ (22,409,661 ) $ 9,115,852 NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2018 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total ASSETS Current assets Cash and cash equivalents $ — $ 17,818 $ 356,557 $ — $ 374,375 Accounts receivable — — 200,722 — 200,722 Taxes receivable — — 20,498 — 20,498 Short-term notes receivable from affiliates — — 3,175,662 (3,175,662 ) — Accounts receivable from affiliates 275,726 61,046 4,823,902 (5,160,674 ) — Prepaid expenses and other current assets — — 61,917 — 61,917 Total current assets 275,726 78,864 8,639,258 (8,336,336 ) 657,512 Property and equipment, at cost — — 10,956,412 — 10,956,412 Accumulated depreciation — — (2,475,694 ) — (2,475,694 ) Property and equipment, net — — 8,480,718 — 8,480,718 Notes receivable from affiliates 5,145 — — (5,145 ) — Investments in affiliates 7,716,068 12,300,840 — (20,016,908 ) — Other assets 609 — 124,540 — 125,149 Total assets $ 7,997,548 $ 12,379,704 $ 17,244,516 $ (28,358,389 ) $ 9,263,379 LIABILITIES AND EQUITY Current liabilities Short-term notes payables to affiliates $ — $ 3,175,662 $ — $ (3,175,662 ) $ — Accounts payable 45 — 125,192 — 125,237 Accrued payroll and related costs — — 50,284 — 50,284 Accounts payable to affiliates 3,725,506 1,098,395 336,773 (5,160,674 ) — Taxes payable — — 29,386 — 29,386 Interest payable 3 99,997 100 — 100,100 Other current liabilities — — 60,012 — 60,012 Total current liabilities 3,725,554 4,374,054 601,747 (8,336,336 ) 365,019 Long-term debt — 3,817,153 60,249 — 3,877,402 Notes payable to affiliates — — 5,145 (5,145 ) — Deferred income taxes — — 91,695 — 91,695 Other liabilities 19,929 — 255,866 — 275,795 Total liabilities 3,745,483 8,191,207 1,014,702 (8,341,481 ) 4,609,911 Commitments and contingencies Shareholders’ equity 4,252,065 4,188,497 15,828,411 (20,016,908 ) 4,252,065 Noncontrolling interests — — 401,403 — 401,403 Total equity 4,252,065 4,188,497 16,229,814 (20,016,908 ) 4,653,468 Total liabilities and equity $ 7,997,548 $ 12,379,704 $ 17,244,516 $ (28,358,389 ) $ 9,263,379 NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS and COMPREHENSIVE INCOME (LOSS) Three Months Ended March 31, 2019 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Operating revenues Contract drilling services $ — $ — $ 270,501 $ — $ 270,501 Reimbursables and other — — 12,387 — 12,387 Total operating revenues — — 282,888 — 282,888 Operating costs and expenses Contract drilling services 35 — 170,827 — 170,862 Reimbursables — — 9,395 — 9,395 Depreciation and amortization — — 108,772 — 108,772 General and administrative — 3 7,592 — 7,595 Total operating costs and expenses 35 3 296,586 — 296,624 Operating loss (35 ) (3 ) (13,698 ) — (13,736 ) Other income (expense) Income (loss) of unconsolidated affiliates (55,708 ) 2,184 — 53,524 — Income (loss) of unconsolidated affiliates - discontinued operations, net of tax (3,821 ) (3,821 ) — 7,642 — Interest expense, net of amounts capitalized (1,318 ) (71,577 ) (2,228 ) 4,879 (70,244 ) Gain on extinguishment of debt, net — 31,266 — — 31,266 Interest income and other, net 69 (7 ) 7,323 (4,879 ) 2,506 Income (loss) before income taxes (60,813 ) (41,958 ) (8,603 ) 61,166 (50,208 ) Income tax benefit — — (2,865 ) — (2,865 ) Net income (loss) from continuing operations (60,813 ) (41,958 ) (11,468 ) 61,166 (53,073 ) Net income (loss) from discontinued operations — — (3,821 ) — (3,821 ) Net income (loss) (60,813 ) (41,958 ) (15,289 ) 61,166 (56,894 ) Net (income) loss attributable to noncontrolling interests — — (3,919 ) — (3,919 ) Net income (loss) attributable to Noble Corporation (60,813 ) (41,958 ) (19,208 ) 61,166 (60,813 ) Other comprehensive income (loss), net 1,058 — 1,058 (1,058 ) 1,058 Comprehensive income (loss) attributable to Noble Corporation $ (59,755 ) $ (41,958 ) $ (18,150 ) $ 60,108 $ (59,755 ) NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS and COMPREHENSIVE INCOME (LOSS) Three Months Ended March 31, 2018 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Operating revenues Contract drilling services $ — $ — $ 229,106 $ — $ 229,106 Reimbursables and other — — 6,050 — 6,050 Total operating revenues — — 235,156 — 235,156 Operating costs and expenses Contract drilling services 81 604 135,721 — 136,406 Reimbursables — — 4,350 — 4,350 Depreciation and amortization — — 127,639 — 127,639 General and administrative 33 618 12,806 — 13,457 Total operating costs and expenses 114 1,222 280,516 — 281,852 Operating loss (114 ) (1,222 ) (45,360 ) — (46,696 ) Other income (expense) Income (loss) of unconsolidated affiliates (130,816 ) 12,518 — 118,298 — Interest expense, net of amounts capitalized (445 ) (119,821 ) — 44,251 (76,015 ) Gain (loss) on extinguishment of debt, net (2,336 ) 5,419 (11,851 ) — (8,768 ) Interest income and other, net 1,568 (129 ) 44,158 (44,251 ) 1,346 Income (loss) before income taxes (132,143 ) (103,235 ) (13,053 ) 118,298 (130,133 ) Income tax benefit — — (2,996 ) — (2,996 ) Net income (loss) (132,143 ) (103,235 ) (16,049 ) 118,298 (133,129 ) Net (income) loss attributable to noncontrolling interests — — 986 — 986 Net income (loss) attributable to Noble Corporation (132,143 ) (103,235 ) (15,063 ) 118,298 (132,143 ) Other comprehensive income (loss), net 991 — 991 (991 ) 991 Comprehensive income (loss) attributable to Noble Corporation $ (131,152 ) $ (103,235 ) $ (14,072 ) $ 117,307 $ (131,152 ) NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Three Months Ended March 31, 2019 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Cash flows from operating activities Net cash provided by (used in) operating activities $ 2,973 $ (110,170 ) $ 76,515 $ — $ (30,682 ) Cash flows from investing activities Capital expenditures — — (96,793 ) — (96,793 ) Proceeds from disposal of assets — — 7,930 — 7,930 Notes receivable from affiliates (43,000 ) 43,000 — Net cash provided by (used in) investing activities — — (131,863 ) 43,000 (88,863 ) Cash flows from financing activities Borrowings on credit facilities 300,000 — 50,000 — 350,000 Repayment of long-term debt — (400,000 ) — — (400,000 ) Debt issuance costs — — (90 ) — (90 ) Dividends paid to noncontrolling interests — — (5,020 ) — (5,020 ) Distributions to parent company, net (12,077 ) — — — (12,077 ) Advances (to) from affiliates (290,895 ) 449,352 (158,457 ) — — Notes payable to affiliates — 43,000 — (43,000 ) — Net cash provided by (used in) financing activities (2,972 ) 92,352 (113,567 ) (43,000 ) (67,187 ) Net change in cash, cash equivalents and restricted cash 1 (17,818 ) (168,915 ) — (186,732 ) Cash, cash equivalents and restricted cash, beginning of period — 17,818 357,232 — 375,050 Cash, cash equivalents and restricted cash, end of period $ 1 $ — $ 188,317 $ — $ 188,318 NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Three Months Ended March 31, 2018 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Cash flows from operating activities Net cash provided by (used in) operating activities $ 7,313 $ (135,393 ) $ 192,977 $ — $ 64,897 Cash flows from investing activities Capital expenditures — — (33,816 ) — (33,816 ) Proceeds from disposal of assets — — 117 — 117 Net cash used in investing activities — — (33,699 ) — (33,699 ) Cash flows from financing activities Repayment of long-term debt — (738,555 ) (213,654 ) — (952,209 ) Issuance of senior notes — 750,000 — — 750,000 Debt issuance costs (217 ) (12,581 ) (1,386 ) — (14,184 ) Dividends paid to noncontrolling interests — — (2,667 ) — (2,667 ) Distribution to parent company, net (13,318 ) — — — (13,318 ) Advances (to) from affiliates 6,221 147,567 (153,788 ) — — Net cash provided by (used in) financing activities (7,314 ) 146,431 (371,495 ) — (232,378 ) Net change in cash, cash equivalents and restricted cash (1 ) 11,038 (212,217 ) — (201,180 ) Cash, cash equivalents and restricted cash, beginning of period 11 29,324 632,676 — 662,011 Cash, cash equivalents and restricted cash, end of period $ 10 $ 40,362 $ 420,459 $ — $ 460,831

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	The accompanying unaudited condensed consolidated financial statements of Noble-UK and Noble-Cayman have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) as they pertain to Quarterly Reports on Form 10-Q. Accordingly, certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The unaudited financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair statement of the financial position and results of operations for the interim periods, on a basis consistent with the annual audited consolidated financial statements. All such adjustments are of a recurring nature. The December 31, 2018 Condensed Consolidated Balance Sheets presented herein are derived from the December 31, 2018 audited consolidated financial statements. These interim financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018 , filed by both Noble-UK and Noble-Cayman. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year.
New Accounting Pronouncements	Accounting Standards Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02 (Topic 842, “Leases”), as amended, which generally requires lessees to recognize operating and financing lease liabilities and corresponding right-of-use assets on the balance sheet and to provide enhanced disclosures surrounding the amount, time and uncertainty of cash flows arising from lease agreements. We adopted this standard, on a modified retrospective basis, effective January 1, 2019 and will not restate comparative periods. Our adoption did not have a material effect on our condensed consolidated financial statements. With respect to leases in which we are the lessee, we recognized a lease liability and a corresponding right-of-use asset of approximately $28.0 million as of January 1, 2019. We have elected the package of practical expedients that permits us to not reassess (1) whether previously expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, and (3) any initial direct costs for any existing leases as of the effective date. In addition, we have elected the hindsight practical expedient in connection with our adoption of the new lease standard. As lessee, we have made the accounting policy election to not recognize a right-of-use asset lease and lease liability for leases with a term of 12 months or less. We will recognize lease payments in the Consolidated Statements of Operations on a straight-line basis over the lease term. We have also elected the practical expedient to not separate lease and non-lease components. Our drilling contracts contain a lease component related to the underlying drilling equipment, in addition to the service component provided by our crews and our expertise to operate such drilling equipment. We have concluded the non-lease service of operating our equipment and providing expertise in the drilling of the client’s well is predominant in our drilling contracts. We have applied the practical expedient to account for the lease and associated non-lease components as a single component. With the election of the practical expedient, we will continue to present a single performance obligation under the new revenue guidance in Accounting Standards Codification (“ASC”) Topic 606, “Revenue from Contracts with Customers.” Issued Accounting Standards With the exception of the updated standards discussed above, there have been no new accounting pronouncements not yet effective that have significance, or potential significance, to our condensed consolidated financial statements.
Contract Balances	Contract Balances Accounts receivable are recognized when the right to consideration becomes unconditional based upon contractual billing schedules. Payment terms on invoiced amounts are typically 30 days. Current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Other current liabilities,” respectively, and noncurrent contract assets and liabilities are included in “Other assets” and “Other liabilities,” respectively, on our Condensed Consolidated Balance Sheets.

Loss Per Share (Tables)

Loss Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share for Noble-UK	The following table presents the computation of basic and diluted loss per share for Noble-UK: Three Months Ended March 31, 2019 2018 Numerator: Basic Net loss from continuing operations $ (67,068 ) $ (142,334 ) Net loss from discontinued operations, net of tax (3,821 ) — Net loss attributable to Noble Corporation plc $ (70,889 ) $ (142,334 ) Diluted Net loss from continuing operations $ (67,068 ) $ (142,334 ) Net loss from discontinued operations, net of tax (3,821 ) — Net loss attributable to Noble Corporation plc $ (70,889 ) $ (142,334 ) Denominator: Weighted average shares outstanding - basic 248,251 246,175 Weighted average shares outstanding - diluted 248,251 246,175 Loss per share Basic: Loss from continuing operations $ (0.27 ) $ (0.58 ) Loss from discontinued operations (0.02 ) — Net loss attributable to Noble Corporation plc $ (0.29 ) $ (0.58 ) Diluted: Loss from continuing operations $ (0.27 ) $ (0.58 ) Loss from discontinued operations (0.02 ) — Net loss attributable to Noble Corporation plc $ (0.29 ) $ (0.58 )

Property and Equipment (Tables)

Property and Equipment (Tables)	3 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment, at Cost	Property and equipment, at cost, for Noble-UK consisted of the following: March 31, 2019 December 31, 2018 Drilling equipment and facilities $ 10,497,161 $ 10,546,376 Construction in progress 318,700 209,091 Other 201,420 200,945 Property and equipment, at cost $ 11,017,281 $ 10,956,412

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Estimated Fair Value of Our Long-Term Debt, not Including Effect of Unamortized Debt Issuance Costs	The following table presents the carrying value, net of unamortized debt issuance costs and discounts, and the estimated fair value of our total debt, not including the effect of unamortized debt issuance costs, respectively: March 31, 2019 December 31, 2018 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Senior unsecured notes: 4.90% Senior Notes due August 2020 $ 62,468 $ 60,066 $ 65,810 $ 60,177 4.625% Senior Notes due March 2021 79,803 77,696 92,967 84,931 3.95% Senior Notes due March 2022 21,171 19,213 41,617 37,096 7.75% Senior Notes due January 2024 388,710 358,561 783,350 613,719 7.95% Senior Notes due April 2025 446,626 388,917 446,517 339,035 7.875% Senior Notes due February 2026 738,389 699,773 738,075 647,085 6.20% Senior Notes due August 2040 390,472 251,079 390,454 245,242 6.05% Senior Notes due March 2041 389,722 250,770 389,693 247,171 5.25% Senior Notes due March 2042 478,028 293,770 477,996 277,056 8.95% Senior Notes due April 2045 390,694 316,960 390,672 311,392 Seller loans: Seller-financed secured loan due September 2022 60,983 59,363 60,251 57,902 Seller-financed secured loan due February 2023 53,725 50,516 — — Credit facilities: 2015 Credit Facility matures January 2020 300,000 300,000 — — 2017 Credit Facility matures January 2023 50,000 50,000 — — Total debt 3,850,791 3,176,684 3,877,402 2,920,806 Less: Current maturities of long-term debt (300,000 ) (300,000 ) — — Long-term debt $ 3,550,791 $ 2,876,684 $ 3,877,402 $ 2,920,806

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Changes in Accumulated Balances for Components of AOCI	The following table presents the changes in the accumulated balances for each component of “Accumulated other comprehensive income (loss)” (“AOCI”) for the three months ended March 31, 2019 and 2018 . All amounts within the table are shown net of tax. Defined Benefit Pension Items (1) Foreign Currency Items Total Balance at December 31, 2017 $ (27,603 ) $ (15,285 ) $ (42,888 ) Activity during period: Stranded tax effect resulting from the Tax Cuts and Jobs Act (5,540 ) — (5,540 ) Balance at January 1, 2018 (33,143 ) (15,285 ) (48,428 ) Activity during period: Other comprehensive income before reclassifications — 667 667 Amounts reclassified from AOCI 324 — 324 Net other comprehensive income 324 667 991 Balance at March 31, 2018 $ (32,819 ) $ (14,618 ) $ (47,437 ) Balance at December 31, 2018 $ (39,058 ) $ (18,014 ) $ (57,072 ) Activity during period: Other comprehensive loss before reclassifications — 508 508 Amounts reclassified from AOCI 550 — 550 Net other comprehensive income (loss) 550 508 1,058 Balance at March 31, 2019 $ (38,508 ) $ (17,506 ) $ (56,014 ) (1) Defined benefit pension items relate to actuarial changes. Reclassifications from AOCI are recognized as expense on our Condensed Consolidated Statements of Operations through “General and administrative.” See “ Note 11— Employee Benefit Plans ” for additional information.

Revenue and Customers (Tables)

Revenue and Customers (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset and Liability	The following table provides information about contract assets and contract liabilities from contracts with customers: March 31, 2019 December 31, 2018 Current contract assets $ 20,824 $ 25,298 Noncurrent contract assets 18,438 22,366 Total contract assets 39,262 47,664 Current contract liabilities (deferred revenue) (29,325 ) (32,906 ) Noncurrent contract liabilities (deferred revenue) (42,939 ) (47,847 ) Total contract liabilities $ (72,264 ) $ (80,753 ) Significant changes in the remaining performance obligation contract assets and the contract liabilities balances for the three months ended March 31, 2019 are as follows: Contract Assets Contract Liabilities Net balance at December 31, 2018 $ 47,664 $ (80,753 ) Amortization of deferred costs (8,775 ) — Additions to deferred costs 373 — Amortization of deferred revenue — 9,355 Additions to deferred revenue — (866 ) Total (8,402 ) 8,489 Net balance at March 31, 2019 $ 39,262 $ (72,264 )
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The following table reflects revenue expected to be recognized in the future related to unsatisfied performance obligations, by rig type, at the end of the reporting period: Three Months Ended March 31, 2019 2019 2020 2021 2022 2023 and beyond Total Floaters $ 15,598 $ 16,073 $ 15,757 $ 9,255 $ 3,568 $ 60,251 Jackups 8,352 3,661 — — — 12,013 Total $ 23,950 $ 19,734 $ 15,757 $ 9,255 $ 3,568 $ 72,264
Disaggregation of revenue by rig types	The following table provides information about contract drilling revenue by rig types: Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 Floaters $ 153,154 120,636 Jackups 117,347 108,470 Total $ 270,501 $ 229,106

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Supplemental financial information and lease cost	Supplemental balance sheet information related to leases was as follows: March 31, 2019 Operating Leases Operating lease right-of-use assets $ 28,272 Current operating lease liabilities 4,396 Long-term operating lease liabilities $ 23,243 Weighted average remaining lease term for operating leases (years) 9.1 Weighted average discounted rate for operating leases 9.6 % The components of lease cost were as follows: March 31, 2019 Operating lease cost $ 1,859 Short-term lease cost 2,052 Variable lease cost 529 Total lease cost $ 4,440 Supplemental cash flow information related to leases was as follows: March 31, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 2,200
Maturities of lease liabilities	Maturities of lease liabilities as of March 31, 2019 were as follows: Operating Leases 2019 $ 4,814 2020 5,917 2021 4,448 2022 3,618 2023 3,250 Thereafter 22,335 Total lease payments 44,382 Less: Interest (16,743 ) Present value of lease liability $ 27,639

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Pension Costs	Pension costs include the following components for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 Non-U.S. U.S. Non-U.S. U.S. Interest cost $ 445 $ 2,178 $ 465 $ 2,045 Return on plan assets (634 ) (2,578 ) (716 ) (2,979 ) Recognized net actuarial gain 3 692 — 411 Net pension benefit cost (gain) $ (186 ) $ 292 $ (251 ) $ (523 )

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Carrying Amount and Estimated Fair Value of Financial Instruments	The following tables present the carrying amount and estimated fair value of our financial instruments recognized at fair value on a recurring basis: March 31, 2019 Estimated Fair Value Measurements Carrying Amount Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets - Marketable securities $ 7,359 $ 7,359 $ — $ — December 31, 2018 Estimated Fair Value Measurements Carrying Amount Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets - Marketable securities $ 8,659 $ 8,659 $ — $ —

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	3 Months Ended
	Mar. 31, 2019
Supplemental Financial Information [Abstract]
Effect of Changes in Other Assets and Liabilities on Cash Flows from Operating Activities	The net effect of changes in other assets and liabilities on cash flows from operating activities is as follows: Noble-UK Noble-Cayman Three Months Ended March 31, Three Months Ended March 31, 2019 2018 2019 2018 Accounts receivable $ (11,007 ) $ 22,892 $ (11,007 ) $ 22,892 Other current assets 17,097 9,986 16,803 9,699 Other assets 3,700 (11,668 ) 4,506 (10,552 ) Accounts payable (1,867 ) 6,175 (1,676 ) 6,175 Other current liabilities (59,685 ) (58,860 ) (59,544 ) (58,780 ) Other liabilities (6,455 ) 2,697 (6,455 ) 2,697 Total net change in assets and liabilities $ (58,217 ) $ (28,778 ) $ (57,373 ) $ (27,869 )

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	3 Months Ended
	Mar. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Guarantor Obligations	Noble-Cayman, or one or more 100 percent owned subsidiaries of Noble-Cayman, is an issuer, co-issuer or full and unconditional guarantor or otherwise obligated as of March 31, 2019 with respect to registered securities as follows (see “ Note 6— Debt ” for additional information): Issuer Notes (1) (Co-Issuer(s)) Guarantor 4.90% Senior Notes due 2020 NHIL Noble-Cayman 4.625% Senior Notes due 2021 NHIL Noble-Cayman 3.95% Senior Notes due 2022 NHIL Noble-Cayman 7.75% Senior Notes due 2024 NHIL Noble-Cayman 7.95% Senior Notes due 2025 NHIL Noble-Cayman 6.20% Senior Notes due 2040 NHIL Noble-Cayman 6.05% Senior Notes due 2041 NHIL Noble-Cayman 5.25% Senior Notes due 2042 NHIL Noble-Cayman 8.95% Senior Notes due 2045 NHIL Noble-Cayman (1) Our 2026 Notes are excluded from this list as they are unregistered securities issued in a non-public offering.
Condensed Consolidating Balance Sheet	NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET March 31, 2019 (in thousands) (Unaudited) Noble - NHIL Other Consolidating Total ASSETS Current assets Cash and cash equivalents $ 1 $ — $ 187,014 $ — $ 187,015 Accounts receivable — — 211,729 — 211,729 Taxes receivable — — 16,303 — 16,303 Accounts receivable from affiliates 743,538 61,045 5,113,199 (5,917,782 ) — Prepaid expenses and other current assets 468 — 45,133 — 45,601 Total current assets 744,007 61,045 5,573,378 (5,917,782 ) 460,648 Property and equipment, at cost — — 11,017,281 — 11,017,281 Accumulated depreciation — — (2,510,699 ) — (2,510,699 ) Property and equipment, net — — 8,506,582 — 8,506,582 Notes receivable from affiliates 5,145 — 43,000 (48,145 ) — Investments in affiliates 7,656,540 8,787,194 — (16,443,734 ) — Other assets — — 148,622 — 148,622 Total assets $ 8,405,692 $ 8,848,239 $ 14,271,582 $ (22,409,661 ) $ 9,115,852 LIABILITIES AND EQUITY Current liabilities Current maturities of long-term debt 300,000 — — — 300,000 Accounts payable 39 63 110,813 — 110,915 Accrued payroll and related costs — — 34,867 — 34,867 Accounts payable to affiliates 3,901,507 1,211,694 804,581 (5,917,782 ) — Taxes payable — — 26,482 — 26,482 Interest payable 1,044 60,170 2,987 — 64,201 Other current liabilities — — 59,038 — 59,038 Total current liabilities 4,202,590 1,271,927 1,038,768 (5,917,782 ) 595,503 Long-term debt — 3,386,083 164,708 — 3,550,791 Notes payable to affiliates — 43,000 5,145 (48,145 ) — Deferred income taxes — — 81,009 — 81,009 Other liabilities 19,929 — 285,145 — 305,074 Total liabilities 4,222,519 4,701,010 1,574,775 (5,965,927 ) 4,532,377 Commitments and contingencies Shareholders’ equity 4,183,173 4,147,229 12,296,505 (16,443,734 ) 4,183,173 Noncontrolling interests — — 400,302 — 400,302 Total equity 4,183,173 4,147,229 12,696,807 (16,443,734 ) 4,583,475 Total liabilities and equity $ 8,405,692 $ 8,848,239 $ 14,271,582 $ (22,409,661 ) $ 9,115,852 NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2018 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total ASSETS Current assets Cash and cash equivalents $ — $ 17,818 $ 356,557 $ — $ 374,375 Accounts receivable — — 200,722 — 200,722 Taxes receivable — — 20,498 — 20,498 Short-term notes receivable from affiliates — — 3,175,662 (3,175,662 ) — Accounts receivable from affiliates 275,726 61,046 4,823,902 (5,160,674 ) — Prepaid expenses and other current assets — — 61,917 — 61,917 Total current assets 275,726 78,864 8,639,258 (8,336,336 ) 657,512 Property and equipment, at cost — — 10,956,412 — 10,956,412 Accumulated depreciation — — (2,475,694 ) — (2,475,694 ) Property and equipment, net — — 8,480,718 — 8,480,718 Notes receivable from affiliates 5,145 — — (5,145 ) — Investments in affiliates 7,716,068 12,300,840 — (20,016,908 ) — Other assets 609 — 124,540 — 125,149 Total assets $ 7,997,548 $ 12,379,704 $ 17,244,516 $ (28,358,389 ) $ 9,263,379 LIABILITIES AND EQUITY Current liabilities Short-term notes payables to affiliates $ — $ 3,175,662 $ — $ (3,175,662 ) $ — Accounts payable 45 — 125,192 — 125,237 Accrued payroll and related costs — — 50,284 — 50,284 Accounts payable to affiliates 3,725,506 1,098,395 336,773 (5,160,674 ) — Taxes payable — — 29,386 — 29,386 Interest payable 3 99,997 100 — 100,100 Other current liabilities — — 60,012 — 60,012 Total current liabilities 3,725,554 4,374,054 601,747 (8,336,336 ) 365,019 Long-term debt — 3,817,153 60,249 — 3,877,402 Notes payable to affiliates — — 5,145 (5,145 ) — Deferred income taxes — — 91,695 — 91,695 Other liabilities 19,929 — 255,866 — 275,795 Total liabilities 3,745,483 8,191,207 1,014,702 (8,341,481 ) 4,609,911 Commitments and contingencies Shareholders’ equity 4,252,065 4,188,497 15,828,411 (20,016,908 ) 4,252,065 Noncontrolling interests — — 401,403 — 401,403 Total equity 4,252,065 4,188,497 16,229,814 (20,016,908 ) 4,653,468 Total liabilities and equity $ 7,997,548 $ 12,379,704 $ 17,244,516 $ (28,358,389 ) $ 9,263,379
Condensed Consolidating Statement of Income	NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS and COMPREHENSIVE INCOME (LOSS) Three Months Ended March 31, 2019 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Operating revenues Contract drilling services $ — $ — $ 270,501 $ — $ 270,501 Reimbursables and other — — 12,387 — 12,387 Total operating revenues — — 282,888 — 282,888 Operating costs and expenses Contract drilling services 35 — 170,827 — 170,862 Reimbursables — — 9,395 — 9,395 Depreciation and amortization — — 108,772 — 108,772 General and administrative — 3 7,592 — 7,595 Total operating costs and expenses 35 3 296,586 — 296,624 Operating loss (35 ) (3 ) (13,698 ) — (13,736 ) Other income (expense) Income (loss) of unconsolidated affiliates (55,708 ) 2,184 — 53,524 — Income (loss) of unconsolidated affiliates - discontinued operations, net of tax (3,821 ) (3,821 ) — 7,642 — Interest expense, net of amounts capitalized (1,318 ) (71,577 ) (2,228 ) 4,879 (70,244 ) Gain on extinguishment of debt, net — 31,266 — — 31,266 Interest income and other, net 69 (7 ) 7,323 (4,879 ) 2,506 Income (loss) before income taxes (60,813 ) (41,958 ) (8,603 ) 61,166 (50,208 ) Income tax benefit — — (2,865 ) — (2,865 ) Net income (loss) from continuing operations (60,813 ) (41,958 ) (11,468 ) 61,166 (53,073 ) Net income (loss) from discontinued operations — — (3,821 ) — (3,821 ) Net income (loss) (60,813 ) (41,958 ) (15,289 ) 61,166 (56,894 ) Net (income) loss attributable to noncontrolling interests — — (3,919 ) — (3,919 ) Net income (loss) attributable to Noble Corporation (60,813 ) (41,958 ) (19,208 ) 61,166 (60,813 ) Other comprehensive income (loss), net 1,058 — 1,058 (1,058 ) 1,058 Comprehensive income (loss) attributable to Noble Corporation $ (59,755 ) $ (41,958 ) $ (18,150 ) $ 60,108 $ (59,755 ) NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS and COMPREHENSIVE INCOME (LOSS) Three Months Ended March 31, 2018 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Operating revenues Contract drilling services $ — $ — $ 229,106 $ — $ 229,106 Reimbursables and other — — 6,050 — 6,050 Total operating revenues — — 235,156 — 235,156 Operating costs and expenses Contract drilling services 81 604 135,721 — 136,406 Reimbursables — — 4,350 — 4,350 Depreciation and amortization — — 127,639 — 127,639 General and administrative 33 618 12,806 — 13,457 Total operating costs and expenses 114 1,222 280,516 — 281,852 Operating loss (114 ) (1,222 ) (45,360 ) — (46,696 ) Other income (expense) Income (loss) of unconsolidated affiliates (130,816 ) 12,518 — 118,298 — Interest expense, net of amounts capitalized (445 ) (119,821 ) — 44,251 (76,015 ) Gain (loss) on extinguishment of debt, net (2,336 ) 5,419 (11,851 ) — (8,768 ) Interest income and other, net 1,568 (129 ) 44,158 (44,251 ) 1,346 Income (loss) before income taxes (132,143 ) (103,235 ) (13,053 ) 118,298 (130,133 ) Income tax benefit — — (2,996 ) — (2,996 ) Net income (loss) (132,143 ) (103,235 ) (16,049 ) 118,298 (133,129 ) Net (income) loss attributable to noncontrolling interests — — 986 — 986 Net income (loss) attributable to Noble Corporation (132,143 ) (103,235 ) (15,063 ) 118,298 (132,143 ) Other comprehensive income (loss), net 991 — 991 (991 ) 991 Comprehensive income (loss) attributable to Noble Corporation $ (131,152 ) $ (103,235 ) $ (14,072 ) $ 117,307 $ (131,152 )
Condensed Consolidating Statement of Cash Flows	NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Three Months Ended March 31, 2019 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Cash flows from operating activities Net cash provided by (used in) operating activities $ 2,973 $ (110,170 ) $ 76,515 $ — $ (30,682 ) Cash flows from investing activities Capital expenditures — — (96,793 ) — (96,793 ) Proceeds from disposal of assets — — 7,930 — 7,930 Notes receivable from affiliates (43,000 ) 43,000 — Net cash provided by (used in) investing activities — — (131,863 ) 43,000 (88,863 ) Cash flows from financing activities Borrowings on credit facilities 300,000 — 50,000 — 350,000 Repayment of long-term debt — (400,000 ) — — (400,000 ) Debt issuance costs — — (90 ) — (90 ) Dividends paid to noncontrolling interests — — (5,020 ) — (5,020 ) Distributions to parent company, net (12,077 ) — — — (12,077 ) Advances (to) from affiliates (290,895 ) 449,352 (158,457 ) — — Notes payable to affiliates — 43,000 — (43,000 ) — Net cash provided by (used in) financing activities (2,972 ) 92,352 (113,567 ) (43,000 ) (67,187 ) Net change in cash, cash equivalents and restricted cash 1 (17,818 ) (168,915 ) — (186,732 ) Cash, cash equivalents and restricted cash, beginning of period — 17,818 357,232 — 375,050 Cash, cash equivalents and restricted cash, end of period $ 1 $ — $ 188,317 $ — $ 188,318 NOBLE CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Three Months Ended March 31, 2018 (in thousands) (Unaudited) Noble- NHIL Other Consolidating Total Cash flows from operating activities Net cash provided by (used in) operating activities $ 7,313 $ (135,393 ) $ 192,977 $ — $ 64,897 Cash flows from investing activities Capital expenditures — — (33,816 ) — (33,816 ) Proceeds from disposal of assets — — 117 — 117 Net cash used in investing activities — — (33,699 ) — (33,699 ) Cash flows from financing activities Repayment of long-term debt — (738,555 ) (213,654 ) — (952,209 ) Issuance of senior notes — 750,000 — — 750,000 Debt issuance costs (217 ) (12,581 ) (1,386 ) — (14,184 ) Dividends paid to noncontrolling interests — — (2,667 ) — (2,667 ) Distribution to parent company, net (13,318 ) — — — (13,318 ) Advances (to) from affiliates 6,221 147,567 (153,788 ) — — Net cash provided by (used in) financing activities (7,314 ) 146,431 (371,495 ) — (232,378 ) Net change in cash, cash equivalents and restricted cash (1 ) 11,038 (212,217 ) — (201,180 ) Cash, cash equivalents and restricted cash, beginning of period 11 29,324 632,676 — 662,011 Cash, cash equivalents and restricted cash, end of period $ 10 $ 40,362 $ 420,459 $ — $ 460,831

Organization and Basis of Pre_3

Organization and Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2019SegmentVessel
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of floaters (vessel)	12
Number of semisubmersibles (vessel)	4
Number of drillships (vessel)	8
Number of jackups (vessel)	13
Number of reportable segments | Segment	1

Accounting Pronouncements (Deta

Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 28,272
Present value of lease liability	$ 27,639
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 28,000
Present value of lease liability		$ 28,000

Consolidated Joint Ventures (De

Consolidated Joint Ventures (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)VesselJointVenture	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Schedule Of Equity Method Investments [Line Items]
Percent of interest in joint ventures	50.00%
Number of joint ventures | JointVenture	2
Number of bully class drillships (vessel) | Vessel	2
Cash and cash equivalents	$ 187,093		$ 375,232
Bully Joint Venture
Schedule Of Equity Method Investments [Line Items]
Dividends approved	10,000	$ 5,300
Carrying amount of the drillships	700,000		700,000
Cash and cash equivalents	$ 42,100		$ 45,200
Bully Joint Venture
Schedule Of Equity Method Investments [Line Items]
Percentage attributable to noncontrolling interests	50.00%

Loss Per Share - Computation of

Loss Per Share - Computation of Basic and Diluted Earnings Per Share for Noble-UK (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic
Net loss from continuing operations	$ (67,068)	$ (142,334)
Net loss from discontinued operations, net of tax	(3,821)	0
Net loss attributable to Noble Corporation plc	(70,889)	(142,334)
Diluted
Net loss attributable to Noble Corporation plc	$ (70,889)	$ (142,334)
Denominator:
Weighted average shares outstanding - basic (shares)	248,251	246,175
Weighted average shares outstanding - diluted (shares)	248,251	246,175
Basic:
Income (loss) from continuing operations (usd per share)	$ (0.27)	$ (0.58)
Loss from discontinued operations (usd per share)	(0.02)	0
Net income (loss) attributable to the company (usd per share)	(0.29)	(0.58)
Diluted:
Income (loss) from continuing operations (usd per share)	(0.27)	(0.58)
Loss from discontinued operations (usd per share)	(0.02)	0
Net income (loss) (usd per share)	$ (0.29)	$ (0.58)

Loss Per Share - Additional Inf

Loss Per Share - Additional Information (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding and trading (shares)	249,150,000		246,794,000
Additional shares authorized for issuance (shares)	83,100,000
Current nominal value per share (usd per share)	$ 0.01		$ 0.01
Number of shares allotted (shares)	0
Equity option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the diluted net income per share (shares)	13,200,000	13,700,000

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	Feb. 28, 2019	Feb. 28, 2019	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			$ 11,017,281	$ 10,956,412
Drilling equipment and facilities
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			10,497,161	10,546,376
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			318,700	209,091
Other
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			$ 201,420	$ 200,945
Noble Joe Knight
Property, Plant and Equipment [Line Items]
Purchase price of asset acquired	$ 83,800	$ 83,800
Seller-financed secured loan due February 2023
Property, Plant and Equipment [Line Items]
Financed value	53,600	$ 53,600
Seller-financed secured loan due February 2023 | Other:
Property, Plant and Equipment [Line Items]
Cash paid to acquire asset	$ 30,200

Debt - Additional Information (

Debt - Additional Information (Details)	Feb. 28, 2019USD ($)	Jan. 31, 2018USD ($)	Mar. 31, 2019USD ($)	Feb. 28, 2019USD ($)	Oct. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Aug. 31, 2018USD ($)	Mar. 31, 2018USD ($)	Feb. 28, 2018USD ($)	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Feb. 01, 2018USD ($)	Jan. 03, 2018USD ($)	Dec. 21, 2017USD ($)
Debt Instrument [Line Items]
Term of debt instrument				4 years		4 years
Gain (loss) on extinguishment of debt, net										$ 31,266,000	$ (8,768,000)
Seller-financed secured loan due February 2023
Debt Instrument [Line Items]
Financed value	$ 53,600,000			$ 53,600,000
Seller-financed secured loan due September 2022
Debt Instrument [Line Items]
Financed value						$ 60,000,000
Line of credit | 2015 Credit Facility matures January 2020
Debt Instrument [Line Items]
Net loss due to reduction of aggregate principal amount										2,300,000
Line of credit | 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities														$ 1,500,000,000
Senior unsecured notes
Debt Instrument [Line Items]
Purchase of senior notes			$ 440,900,000		$ 27,400,000		$ 400,000	$ 9,500,000		440,900,000	9,500,000		$ 754,200,000
Repurchase amount			400,000,000		20,200,000		300,000	8,700,000		$ 400,000,000	$ 8,700,000		$ 750,000,000
Gain (loss) on extinguishment of debt, net			$ 31,300,000		$ 6,900,000		$ 100,000	500,000	$ (3,500,000)
Extinguished aggregate principal amount								$ 126,600,000
Senior unsecured notes | 2015 Credit Facility matures January 2020
Debt Instrument [Line Items]
Maximum debt to tangible capitalization covenant			60.00%							60.00%
Senior unsecured notes | 2026 Notes
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount		$ 750,000,000
Senior unsecured notes | 2026 Notes | NHIL
Debt Instrument [Line Items]
Proceeds of offering, after estimated expenses		$ 737,400,000
Required percentage of book value of material drilling equipment		85.00%								85.00%
Senior unsecured notes | 7.50% Senior Notes due March 2019
Debt Instrument [Line Items]
Purchase of senior notes									61,900,000
Repurchase amount									65,300,000
Gain (loss) on extinguishment of debt, net									$ (3,500,000)
Secured loan | Seller-financed secured loan due February 2023
Debt Instrument [Line Items]
Interest rate	4.25%			4.25%
Interest rate paid-in-kind	1.25%			1.25%
Interest rate on first year	8.91%			8.91%
Secured loan | Seller-financed secured loan due September 2022
Debt Instrument [Line Items]
Term of debt instrument						4 years
Interest rate						4.25%
Interest rate paid-in-kind						1.25%
Interest rate on first year						8.91%
Senior unsecured credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities			$ 300,000,000							$ 300,000,000
Credit Facility | Line of credit | 2015 Credit Facility matures January 2020
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities			300,000,000							300,000,000
Borrowings outstanding or letters of credit issued			300,000,000							300,000,000		$ 0
Credit Facility | Line of credit | 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities														300,000,000
Credit facility, ability to increase (up to)														500,000,000
Borrowings outstanding or letters of credit issued			$ 50,000,000							$ 50,000,000		$ 0
Maximum debt to tangible capitalization covenant			48.00%							48.00%					55.00%
Covenant, rig value of marketed rigs to indebtedness, end of each fiscal quarter															3
Covenant, rig value of closing date rigs, end of each fiscal quarter															0.8
Covenant, restrictions on borrowings, maximum Available Cash															$ 200,000,000
Letters of credit | Line of credit | 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities			$ 50,000,000							$ 50,000,000				$ 15,000,000
Borrowings outstanding or letters of credit issued			$ 3,400,000							$ 3,400,000
Noble Joe Knight
Debt Instrument [Line Items]
Purchase price of asset acquired	$ 83,800,000			$ 83,800,000
Noble Johnny Whitstine
Debt Instrument [Line Items]
Purchase price of asset acquired						$ 93,800,000
Due at End of Third-Year | Seller-financed secured loan due February 2023
Debt Instrument [Line Items]
Term of debt instrument				4 years
Percentage of principal payment due at end of term	5.00%			5.00%
Due at End of Third-Year | Seller-financed secured loan due September 2022
Debt Instrument [Line Items]
Percentage of principal payment due at end of term						5.00%
Due at End of Four-Year Term | Seller-financed secured loan due February 2023
Debt Instrument [Line Items]
Percentage of principal payment due at end of term	95.00%			95.00%
Due at End of Four-Year Term | Seller-financed secured loan due September 2022
Debt Instrument [Line Items]
Percentage of principal payment due at end of term						95.00%
LIBOR | Maximum | Credit Facility | Line of credit | 2015 Credit Facility matures January 2020
Debt Instrument [Line Items]
Interest rate on senior notes										1.65%
LIBOR | Maximum | Credit Facility | Line of credit | 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Interest rate on senior notes										4.25%

Debt - Estimated Fair Value of

Debt - Estimated Fair Value of Our Long-Term Debt, not Including Effect of Unamortized Debt Issuance Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Less: Current maturities of long-term debt	$ (300,000)	$ 0
Long-term debt	3,550,791	3,877,402
Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	3,850,791	3,877,402
Less: Current maturities of long-term debt	(300,000)	0
Long-term debt	3,550,791	3,877,402
Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	3,176,684	2,920,806
Less: Current maturities of long-term debt	(300,000)	0
Long-term debt	$ 2,876,684	2,920,806
4.90% Senior Notes due August 2020
Debt Instrument [Line Items]
Interest rate on senior notes	4.90%
4.625% Senior Notes due March 2021
Debt Instrument [Line Items]
Interest rate on senior notes	4.625%
3.95% Senior Notes due March 2022
Debt Instrument [Line Items]
Interest rate on senior notes	3.95%
7.75% Senior Notes due January 2024
Debt Instrument [Line Items]
Interest rate on senior notes	7.75%
7.95% Senior Notes due April 2025
Debt Instrument [Line Items]
Interest rate on senior notes	7.95%
6.20% Senior Notes due August 2040
Debt Instrument [Line Items]
Interest rate on senior notes	6.20%
6.05% Senior Notes due March 2041
Debt Instrument [Line Items]
Interest rate on senior notes	6.05%
5.25% Senior Notes due March 2042
Debt Instrument [Line Items]
Interest rate on senior notes	5.25%
8.95% Senior Notes due April 2045
Debt Instrument [Line Items]
Interest rate on senior notes	8.95%
Senior unsecured notes | 4.90% Senior Notes due August 2020
Debt Instrument [Line Items]
Interest rate on senior notes	4.90%
Senior unsecured notes | 4.90% Senior Notes due August 2020 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 62,468	65,810
Senior unsecured notes | 4.90% Senior Notes due August 2020 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 60,066	60,177
Senior unsecured notes | 4.625% Senior Notes due March 2021
Debt Instrument [Line Items]
Interest rate on senior notes	4.625%
Senior unsecured notes | 4.625% Senior Notes due March 2021 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 79,803	92,967
Senior unsecured notes | 4.625% Senior Notes due March 2021 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 77,696	84,931
Senior unsecured notes | 3.95% Senior Notes due March 2022
Debt Instrument [Line Items]
Interest rate on senior notes	3.95%
Senior unsecured notes | 3.95% Senior Notes due March 2022 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 21,171	41,617
Senior unsecured notes | 3.95% Senior Notes due March 2022 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 19,213	37,096
Senior unsecured notes | 7.75% Senior Notes due January 2024
Debt Instrument [Line Items]
Interest rate on senior notes	7.75%
Senior unsecured notes | 7.75% Senior Notes due January 2024 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 388,710	783,350
Senior unsecured notes | 7.75% Senior Notes due January 2024 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 358,561	613,719
Senior unsecured notes | 7.95% Senior Notes due April 2025
Debt Instrument [Line Items]
Interest rate on senior notes	7.95%
Senior unsecured notes | 7.95% Senior Notes due April 2025 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 446,626	446,517
Senior unsecured notes | 7.95% Senior Notes due April 2025 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 388,917	339,035
Senior unsecured notes | 7.875% Senior Notes due February 2026
Debt Instrument [Line Items]
Interest rate on senior notes	7.875%
Senior unsecured notes | 7.875% Senior Notes due February 2026 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 738,389	738,075
Senior unsecured notes | 7.875% Senior Notes due February 2026 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 699,773	647,085
Senior unsecured notes | 6.20% Senior Notes due August 2040
Debt Instrument [Line Items]
Interest rate on senior notes	6.20%
Senior unsecured notes | 6.20% Senior Notes due August 2040 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 390,472	390,454
Senior unsecured notes | 6.20% Senior Notes due August 2040 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 251,079	245,242
Senior unsecured notes | 6.05% Senior Notes due March 2041
Debt Instrument [Line Items]
Interest rate on senior notes	6.05%
Senior unsecured notes | 6.05% Senior Notes due March 2041 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 389,722	389,693
Senior unsecured notes | 6.05% Senior Notes due March 2041 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 250,770	247,171
Senior unsecured notes | 5.25% Senior Notes due March 2042
Debt Instrument [Line Items]
Interest rate on senior notes	5.25%
Senior unsecured notes | 5.25% Senior Notes due March 2042 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 478,028	477,996
Senior unsecured notes | 5.25% Senior Notes due March 2042 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 293,770	277,056
Senior unsecured notes | 8.95% Senior Notes due April 2045
Debt Instrument [Line Items]
Interest rate on senior notes	8.95%
Senior unsecured notes | 8.95% Senior Notes due April 2045 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	$ 390,694	390,672
Senior unsecured notes | 8.95% Senior Notes due April 2045 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	316,960	311,392
Seller loans: | Seller-financed secured loan due September 2022 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	60,983	60,251
Seller loans: | Seller-financed secured loan due September 2022 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	59,363	57,902
Seller loans: | Seller-financed secured loan due February 2023 | Carrying Value
Debt Instrument [Line Items]
Senior unsecured notes	53,725	0
Seller loans: | Seller-financed secured loan due February 2023 | Estimated Fair Value
Debt Instrument [Line Items]
Senior unsecured notes	50,516	0
Credit Facility | Line of credit | 2015 Credit Facility matures January 2020
Debt Instrument [Line Items]
Credit facilities	300,000	0
Credit Facility | Line of credit | 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Credit facilities	$ 50,000	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 5,950,628		$ 4,654,574	$ 5,950,628
Stranded tax effect resulting from the Tax Cuts and Job Act	(5,540)
Stockholders' equity, adjusted balance	5,800,747
Other comprehensive income (loss) before reclassifications			508	667
Amounts reclassified from AOCI			550	324
Other comprehensive income, net			1,058	991
Ending Balance		$ 5,950,628	4,583,808	5,658,842
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(27,603)		(39,058)	(27,603)
Stranded tax effect resulting from the Tax Cuts and Job Act	(5,540)
Stockholders' equity, adjusted balance	(33,143)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from AOCI			550	324
Other comprehensive income, net			550	324
Ending Balance		(27,603)	(38,508)	(32,819)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(15,285)		(18,014)	(15,285)
Stranded tax effect resulting from the Tax Cuts and Job Act	0
Stockholders' equity, adjusted balance	(15,285)
Other comprehensive income (loss) before reclassifications			508	667
Amounts reclassified from AOCI			0	0
Other comprehensive income, net			508	667
Ending Balance		(15,285)	(17,506)	(14,618)
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(42,888)		(57,072)	(42,888)
Stranded tax effect resulting from the Tax Cuts and Job Act		(5,540)
Stockholders' equity, adjusted balance	$ (48,428)
Other comprehensive income, net			1,058	991
Ending Balance		$ (42,888)	$ (56,014)	$ (47,437)

Revenue and Customers - Additio

Revenue and Customers - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Payment term	P30D

Revenue and Customers - Receiva

Revenue and Customers - Receivables, Contract Assets, and Contract Liabilities with Customers (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Current contract assets	$ 20,824	$ 25,298
Noncurrent contract assets	18,438	22,366
Total contract assets	39,262	47,664
Current contract liabilities (deferred revenue)	(29,325)	(32,906)
Noncurrent contract liabilities (deferred revenue)	(42,939)	(47,847)
Total contract liabilities	$ (72,264)	$ (80,753)

Revenue and Customers - Signifi

Revenue and Customers - Significant Changes in Contract Assets and Contract Liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Change In Contract With Customer, Asset And Liability [Roll Forward]
Contract assets, beginning balance	$ 47,664
Contract liabilities, beginning balance	(80,753)
Amortization of deferred costs	(8,775)
Additions to deferred costs	373
Amortization of deferred revenue	9,355
Additions to deferred revenue	(866)
Total	(8,402)
Total	8,489
Contract assets, ending balance	39,262
Contract liabilities, ending balance	$ (72,264)

Revenue and Customers - Remaini

Revenue and Customers - Remaining Performance Obligations (Details) $ in Thousands	Mar. 31, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue from Contract with Customer [Abstract]
Performance obligation, expected timing of satisfaction	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 23,950
Performance obligation, expected timing of satisfaction	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 19,734
Performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 15,757
Performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 9,255
Performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Performance obligation, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 3,568
Performance obligation, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 72,264
Floaters | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	15,598
Floaters | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	16,073
Floaters | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	15,757
Floaters | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	9,255
Floaters | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	3,568
Floaters | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	60,251
Jackups | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	8,352
Jackups | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	3,661
Jackups | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	0
Jackups | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	0
Jackups | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	0
Jackups | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations	$ 12,013

Revenue and Customers - Disaggr

Revenue and Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 282,888	$ 235,157
Floaters
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	153,154	120,636
Jackups
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	117,347	108,470
Contract drilling services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 270,501	$ 229,106

Leases - Supplemental balance s

Leases - Supplemental balance sheet information (Details) $ in Thousands	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 28,272
Current operating lease liabilities	4,396
Long-term operating lease liabilities	$ 23,243
Weighted average remaining lease term for operating leases (years)	9 years 1 month 12 days
Weighted average discounted rate for operating leases	9.60%

Leases - Components of lease co

Leases - Components of lease cost (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 1,859
Short-term lease cost	2,052
Variable lease cost	529
Total lease cost	$ 4,440

Leases - Supplemental cash flow

Leases - Supplemental cash flow information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 2,200

Leases - Maturities of lease li

Leases - Maturities of lease liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
Leases [Abstract]
2019	$ 4,814
2020	5,917
2021	4,448
2022	3,618
2023	3,250
Thereafter	22,335
Total lease payments	44,382
Less: Interest	(16,743)
Present value of lease liability	$ 27,639

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Reserves for uncertain tax positions net	$ 195.1	$ 183.8
Related tax benefits	$ 1	$ 1
Operational period	12 months

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 0	$ 0
Service cost	0	0
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Interest cost	445,000	465,000
Return on plan assets	(634,000)	(716,000)
Recognized net actuarial gain	3,000	0
Net pension benefit cost (gain)	(186,000)	(251,000)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Interest cost	2,178,000	2,045,000
Return on plan assets	(2,578,000)	(2,979,000)
Recognized net actuarial gain	692,000	411,000
Net pension benefit cost (gain)	$ 292,000	$ (523,000)

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Quoted Prices in Active Markets (Level 1)
Assets -
Marketable securities	$ 7,359	$ 8,659
Significant Other Observable Inputs (Level 2)
Assets -
Marketable securities	0	0
Significant Unobservable Inputs (Level 3)
Assets -
Marketable securities	0	0
Carrying Amount
Assets -
Marketable securities	$ 7,359	$ 8,659

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	Dec. 15, 2017USD ($)	Jan. 31, 2017Rig	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	May 02, 2017USD ($)
Other Commitments [Line Items]
Number of newbuild rigs allegedly violating patents | Rig		5
Net loss from discontinued operations, net of tax			$ (3,821)	$ 0
Years of effectiveness of employment agreements after the termination of employment			3 years
Minimum
Other Commitments [Line Items]
Percentage of uncertain tax positions likelihood of being sustained (greater than)			50.00%
Income and other business taxes | Mexico | Foreign tax authority
Other Commitments [Line Items]
Approximate audit claims assessed			$ 51,900
Paragon Offshore
Other Commitments [Line Items]
Litigation trust fund					$ 10,000
Damages sought	$ 1,700,000
Coverage limit			150,000
Paragon Offshore | Mexico
Other Commitments [Line Items]
Net loss from discontinued operations, net of tax			$ 3,800

Supplemental Financial Inform_3

Supplemental Financial Information - Additional Information (Details) - USD ($) $ in Millions	Feb. 28, 2019	Feb. 28, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted cash			$ 1.3	$ 0.7
Capital expenditures incurred but not yet paid			$ 38.5	$ 52.1	$ 29.6	$ 25.5
Seller-financed secured loan due February 2023
Condensed Balance Sheet Statements, Captions [Line Items]
Financed value	$ 53.6	$ 53.6

Supplemental Financial Inform_4

Supplemental Financial Information - Effect of Changes in Other Assets and Liabilities on Cash Flows from Operating Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Capital [Line Items]
Total net change in assets and liabilities	$ (58,217)	$ (28,778)
Noble-UK
Operating Capital [Line Items]
Accounts receivable	(11,007)	22,892
Other current assets	17,097	9,986
Other assets	3,700	(11,668)
Accounts payable	(1,867)	6,175
Other current liabilities	(59,685)	(58,860)
Other liabilities	(6,455)	2,697
Total net change in assets and liabilities	(58,217)	(28,778)
Noble-Cayman
Operating Capital [Line Items]
Accounts receivable	(11,007)	22,892
Other current assets	16,803	9,699
Other assets	4,506	(10,552)
Accounts payable	(1,676)	6,175
Other current liabilities	(59,544)	(58,780)
Other liabilities	(6,455)	2,697
Total net change in assets and liabilities	$ (57,373)	$ (27,869)

Condensed Consolidating Finan_3

Condensed Consolidating Financial Information - Guarantor Obligations (Details)	Mar. 31, 2019
4.90% Senior Notes due August 2020
Guarantor Obligations [Line Items]
Interest rate on senior notes	4.90%
4.625% Senior Notes due March 2021
Guarantor Obligations [Line Items]
Interest rate on senior notes	4.625%
3.95% Senior Notes due March 2022
Guarantor Obligations [Line Items]
Interest rate on senior notes	3.95%
7.75% Senior Notes due January 2024
Guarantor Obligations [Line Items]
Interest rate on senior notes	7.75%
7.95% Senior Notes due April 2025
Guarantor Obligations [Line Items]
Interest rate on senior notes	7.95%
6.20% Senior Notes due August 2040
Guarantor Obligations [Line Items]
Interest rate on senior notes	6.20%
6.05% Senior Notes due March 2041
Guarantor Obligations [Line Items]
Interest rate on senior notes	6.05%
5.25% Senior Notes due March 2042
Guarantor Obligations [Line Items]
Interest rate on senior notes	5.25%
8.95% Senior Notes due April 2045
Guarantor Obligations [Line Items]
Interest rate on senior notes	8.95%

Condensed Consolidating Finan_4

Condensed Consolidating Financial Information - Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 187,093	$ 375,232
Accounts receivable	211,729	200,722
Taxes receivable	16,294	20,498
Prepaid expenses and other current assets	45,994	62,604
Total current assets	461,110	659,056
Property and equipment, at cost	11,017,281	10,956,412
Accumulated depreciation	(2,510,699)	(2,475,694)
Property and equipment, net	8,506,582	8,480,718
Other assets	148,622	125,149
Total assets	9,116,314	9,264,923
Current liabilities
Current maturities of long-term debt	300,000	0
Accounts payable	111,044	125,557
Accrued payroll and related costs	34,867	50,284
Taxes payable	26,482	29,386
Interest payable	64,201	100,100
Other current liabilities	59,038	60,130
Total current liabilities	595,632	365,457
Long-term debt	3,550,791	3,877,402
Deferred income taxes	81,009	91,695
Other liabilities	305,074	275,795
Total liabilities	4,532,506	4,610,349
Commitments and contingencies
Shareholders’ equity	4,183,506	4,253,171
Noncontrolling interests	400,302	401,403
Total equity	4,583,808	4,654,574	$ 5,658,842	$ 5,950,628
Total liabilities and equity	9,116,314	9,264,923
Noble Corp
Current assets
Cash and cash equivalents	187,015	374,375
Accounts receivable	211,729	200,722
Taxes receivable	16,303	20,498
Short-term notes receivable from affiliates		0
Accounts receivable from affiliates	0	0
Prepaid expenses and other current assets	45,601	61,917
Total current assets	460,648	657,512
Property and equipment, at cost	11,017,281	10,956,412
Accumulated depreciation	(2,510,699)	(2,475,694)
Property and equipment, net	8,506,582	8,480,718
Notes receivable from affiliates	0	0
Investments in affiliates	0	0
Other assets	148,622	125,149
Total assets	9,115,852	9,263,379
Current liabilities
Short-term notes payables to affiliates		0
Current maturities of long-term debt	300,000	0
Accounts payable	110,915	125,237
Accrued payroll and related costs	34,867	50,284
Accounts payable to affiliates	0	0
Taxes payable	26,482	29,386
Interest payable	64,201	100,100
Other current liabilities	59,038	60,012
Total current liabilities	595,503	365,019
Long-term debt	3,550,791	3,877,402
Notes payable to affiliates	0	0
Deferred income taxes	81,009	91,695
Other liabilities	305,074	275,795
Total liabilities	4,532,377	4,609,911
Commitments and contingencies
Shareholders’ equity	4,183,173	4,252,065
Noncontrolling interests	400,302	401,403
Total equity	4,583,475	4,653,468	$ 5,658,292	$ 5,950,014
Total liabilities and equity	9,115,852	9,263,379
Noble Corp | Consolidating Adjustments
Current assets
Cash and cash equivalents	0	0
Accounts receivable	0	0
Taxes receivable	0	0
Short-term notes receivable from affiliates		(3,175,662)
Accounts receivable from affiliates	(5,917,782)	(5,160,674)
Prepaid expenses and other current assets	0	0
Total current assets	(5,917,782)	(8,336,336)
Property and equipment, at cost	0	0
Accumulated depreciation	0	0
Property and equipment, net	0	0
Notes receivable from affiliates	(48,145)	(5,145)
Investments in affiliates	(16,443,734)	(20,016,908)
Other assets	0	0
Total assets	(22,409,661)	(28,358,389)
Current liabilities
Short-term notes payables to affiliates		(3,175,662)
Current maturities of long-term debt	0
Accounts payable	0	0
Accrued payroll and related costs	0	0
Accounts payable to affiliates	(5,917,782)	(5,160,674)
Taxes payable	0	0
Interest payable	0	0
Other current liabilities	0	0
Total current liabilities	(5,917,782)	(8,336,336)
Long-term debt	0	0
Notes payable to affiliates	(48,145)	(5,145)
Deferred income taxes	0	0
Other liabilities	0	0
Total liabilities	(5,965,927)	(8,341,481)
Commitments and contingencies
Shareholders’ equity	(16,443,734)	(20,016,908)
Noncontrolling interests	0	0
Total equity	(16,443,734)	(20,016,908)
Total liabilities and equity	(22,409,661)	(28,358,389)
Noble Corp | Noble-Cayman | Reportable Legal Entities
Current assets
Cash and cash equivalents	1	0
Accounts receivable	0	0
Taxes receivable	0	0
Short-term notes receivable from affiliates		0
Accounts receivable from affiliates	743,538	275,726
Prepaid expenses and other current assets	468	0
Total current assets	744,007	275,726
Property and equipment, at cost	0	0
Accumulated depreciation	0	0
Property and equipment, net	0	0
Notes receivable from affiliates	5,145	5,145
Investments in affiliates	7,656,540	7,716,068
Other assets	0	609
Total assets	8,405,692	7,997,548
Current liabilities
Short-term notes payables to affiliates		0
Current maturities of long-term debt	300,000
Accounts payable	39	45
Accrued payroll and related costs	0	0
Accounts payable to affiliates	3,901,507	3,725,506
Taxes payable	0	0
Interest payable	1,044	3
Other current liabilities	0	0
Total current liabilities	4,202,590	3,725,554
Long-term debt	0	0
Notes payable to affiliates	0	0
Deferred income taxes	0	0
Other liabilities	19,929	19,929
Total liabilities	4,222,519	3,745,483
Commitments and contingencies
Shareholders’ equity	4,183,173	4,252,065
Noncontrolling interests	0	0
Total equity	4,183,173	4,252,065
Total liabilities and equity	8,405,692	7,997,548
Noble Corp | NHIL | Reportable Legal Entities
Current assets
Cash and cash equivalents	0	17,818
Accounts receivable	0	0
Taxes receivable	0	0
Short-term notes receivable from affiliates		0
Accounts receivable from affiliates	61,045	61,046
Prepaid expenses and other current assets	0	0
Total current assets	61,045	78,864
Property and equipment, at cost	0	0
Accumulated depreciation	0	0
Property and equipment, net	0	0
Notes receivable from affiliates	0	0
Investments in affiliates	8,787,194	12,300,840
Other assets	0	0
Total assets	8,848,239	12,379,704
Current liabilities
Short-term notes payables to affiliates		3,175,662
Current maturities of long-term debt	0
Accounts payable	63	0
Accrued payroll and related costs	0	0
Accounts payable to affiliates	1,211,694	1,098,395
Taxes payable	0	0
Interest payable	60,170	99,997
Other current liabilities	0	0
Total current liabilities	1,271,927	4,374,054
Long-term debt	3,386,083	3,817,153
Notes payable to affiliates	43,000	0
Deferred income taxes	0	0
Other liabilities	0	0
Total liabilities	4,701,010	8,191,207
Commitments and contingencies
Shareholders’ equity	4,147,229	4,188,497
Noncontrolling interests	0	0
Total equity	4,147,229	4,188,497
Total liabilities and equity	8,848,239	12,379,704
Noble Corp | Other Non-guarantor Subsidiaries of Noble | Reportable Legal Entities
Current assets
Cash and cash equivalents	187,014	356,557
Accounts receivable	211,729	200,722
Taxes receivable	16,303	20,498
Short-term notes receivable from affiliates		3,175,662
Accounts receivable from affiliates	5,113,199	4,823,902
Prepaid expenses and other current assets	45,133	61,917
Total current assets	5,573,378	8,639,258
Property and equipment, at cost	11,017,281	10,956,412
Accumulated depreciation	(2,510,699)	(2,475,694)
Property and equipment, net	8,506,582	8,480,718
Notes receivable from affiliates	43,000	0
Investments in affiliates	0	0
Other assets	148,622	124,540
Total assets	14,271,582	17,244,516
Current liabilities
Short-term notes payables to affiliates		0
Current maturities of long-term debt	0
Accounts payable	110,813	125,192
Accrued payroll and related costs	34,867	50,284
Accounts payable to affiliates	804,581	336,773
Taxes payable	26,482	29,386
Interest payable	2,987	100
Other current liabilities	59,038	60,012
Total current liabilities	1,038,768	601,747
Long-term debt	164,708	60,249
Notes payable to affiliates	5,145	5,145
Deferred income taxes	81,009	91,695
Other liabilities	285,145	255,866
Total liabilities	1,574,775	1,014,702
Commitments and contingencies
Shareholders’ equity	12,296,505	15,828,411
Noncontrolling interests	400,302	401,403
Total equity	12,696,807	16,229,814
Total liabilities and equity	$ 14,271,582	$ 17,244,516

Condensed Consolidating Finan_5

Condensed Consolidating Financial Information - Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenues
Revenue from contract with customer	$ 282,888	$ 235,157
Operating costs and expenses
Depreciation and amortization	109,578	128,755
General and administrative	15,999	22,083
Total operating costs and expenses	306,700	292,037
Operating loss	(23,812)	(56,880)
Other income (expense)
Interest income (expense), net of amounts capitalized	(70,244)	(76,015)
Gain (loss) on extinguishment of debt, net	31,266	(8,768)
Interest income and other, net	2,506	1,339
Loss from continuing operations before income taxes	(60,284)	(140,324)
Income tax provision	(2,865)	(2,996)
Net loss from continuing operations	(63,149)	(143,320)
Net loss from discontinued operations, net of tax	(3,821)	0
Net loss	(66,970)	(143,320)
Net (income) loss attributable to noncontrolling interests	(3,919)	986
Net income (loss) attributable to the company	(70,889)	(142,334)
Other comprehensive income, net	1,058	991
Comprehensive income (loss) attributable to the company	(69,831)	(141,343)
Noble Corp
Operating revenues
Revenue from contract with customer	282,888	235,156
Operating costs and expenses
Depreciation and amortization	108,772	127,639
General and administrative	7,595	13,457
Total operating costs and expenses	296,624	281,852
Operating loss	(13,736)	(46,696)
Other income (expense)
Income (loss) of unconsolidated affiliates	0	0
Income (loss) of unconsolidated affiliates - discontinued operations, net of tax	0
Interest income (expense), net of amounts capitalized	(70,244)	(76,015)
Gain (loss) on extinguishment of debt, net	31,266	(8,768)
Interest income and other, net	2,506	1,346
Loss from continuing operations before income taxes	(50,208)	(130,133)
Income tax provision	(2,865)	(2,996)
Net loss from continuing operations	(53,073)	(133,129)
Net loss from discontinued operations, net of tax	(3,821)	0
Net loss	(56,894)	(133,129)
Net (income) loss attributable to noncontrolling interests	(3,919)	986
Net income (loss) attributable to the company	(60,813)	(132,143)
Other comprehensive income, net	1,058	991
Comprehensive income (loss) attributable to the company	(59,755)	(131,152)
Noble Corp | Consolidating Adjustments
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Depreciation and amortization	0	0
General and administrative	0	0
Total operating costs and expenses	0	0
Operating loss	0	0
Other income (expense)
Income (loss) of unconsolidated affiliates	53,524	118,298
Income (loss) of unconsolidated affiliates - discontinued operations, net of tax	7,642
Interest income (expense), net of amounts capitalized	4,879	44,251
Gain (loss) on extinguishment of debt, net	0	0
Interest income and other, net	(4,879)	(44,251)
Loss from continuing operations before income taxes	61,166	118,298
Income tax provision	0	0
Net loss from continuing operations	61,166
Net loss from discontinued operations, net of tax	0
Net loss	61,166	118,298
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to the company	61,166	118,298
Other comprehensive income, net	(1,058)	(991)
Comprehensive income (loss) attributable to the company	60,108	117,307
Noble Corp | Noble-Cayman | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Depreciation and amortization	0	0
General and administrative	0	33
Total operating costs and expenses	35	114
Operating loss	(35)	(114)
Other income (expense)
Income (loss) of unconsolidated affiliates	(55,708)	(130,816)
Income (loss) of unconsolidated affiliates - discontinued operations, net of tax	(3,821)
Interest income (expense), net of amounts capitalized	(1,318)	(445)
Gain (loss) on extinguishment of debt, net	0	(2,336)
Interest income and other, net	69	1,568
Loss from continuing operations before income taxes	(60,813)	(132,143)
Income tax provision	0	0
Net loss from continuing operations	(60,813)
Net loss from discontinued operations, net of tax	0
Net loss	(60,813)	(132,143)
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to the company	(60,813)	(132,143)
Other comprehensive income, net	1,058	991
Comprehensive income (loss) attributable to the company	(59,755)	(131,152)
Noble Corp | NHIL | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Depreciation and amortization	0	0
General and administrative	3	618
Total operating costs and expenses	3	1,222
Operating loss	(3)	(1,222)
Other income (expense)
Income (loss) of unconsolidated affiliates	2,184	12,518
Income (loss) of unconsolidated affiliates - discontinued operations, net of tax	(3,821)
Interest income (expense), net of amounts capitalized	(71,577)	(119,821)
Gain (loss) on extinguishment of debt, net	31,266	5,419
Interest income and other, net	(7)	(129)
Loss from continuing operations before income taxes	(41,958)	(103,235)
Income tax provision	0	0
Net loss from continuing operations	(41,958)
Net loss from discontinued operations, net of tax	0
Net loss	(41,958)	(103,235)
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to the company	(41,958)	(103,235)
Other comprehensive income, net	0	0
Comprehensive income (loss) attributable to the company	(41,958)	(103,235)
Noble Corp | Other Non-guarantor Subsidiaries of Noble | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	282,888	235,156
Operating costs and expenses
Depreciation and amortization	108,772	127,639
General and administrative	7,592	12,806
Total operating costs and expenses	296,586	280,516
Operating loss	(13,698)	(45,360)
Other income (expense)
Income (loss) of unconsolidated affiliates	0	0
Income (loss) of unconsolidated affiliates - discontinued operations, net of tax	0
Interest income (expense), net of amounts capitalized	(2,228)	0
Gain (loss) on extinguishment of debt, net	0	(11,851)
Interest income and other, net	7,323	44,158
Loss from continuing operations before income taxes	(8,603)	(13,053)
Income tax provision	(2,865)	(2,996)
Net loss from continuing operations	(11,468)
Net loss from discontinued operations, net of tax	(3,821)
Net loss	(15,289)	(16,049)
Net (income) loss attributable to noncontrolling interests	(3,919)	986
Net income (loss) attributable to the company	(19,208)	(15,063)
Other comprehensive income, net	1,058	991
Comprehensive income (loss) attributable to the company	(18,150)	(14,072)
Contract drilling services
Operating revenues
Revenue from contract with customer	270,501	229,106
Operating costs and expenses
Cost of services	171,728	136,849
Contract drilling services | Noble Corp
Operating revenues
Revenue from contract with customer	270,501	229,106
Operating costs and expenses
Cost of services	170,862	136,406
Contract drilling services | Noble Corp | Consolidating Adjustments
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Cost of services	0	0
Contract drilling services | Noble Corp | Noble-Cayman | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Cost of services	35	81
Contract drilling services | Noble Corp | NHIL | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Cost of services	0	604
Contract drilling services | Noble Corp | Other Non-guarantor Subsidiaries of Noble | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	270,501	229,106
Operating costs and expenses
Cost of services	170,827	135,721
Reimbursables and other
Operating revenues
Revenue from contract with customer	12,387	6,051
Operating costs and expenses
Cost of services	9,395	4,350
Reimbursables and other | Noble Corp
Operating revenues
Revenue from contract with customer	12,387	6,050
Operating costs and expenses
Cost of services	9,395	4,350
Reimbursables and other | Noble Corp | Consolidating Adjustments
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Cost of services	0	0
Reimbursables and other | Noble Corp | Noble-Cayman | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Cost of services	0	0
Reimbursables and other | Noble Corp | NHIL | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	0	0
Operating costs and expenses
Cost of services	0	0
Reimbursables and other | Noble Corp | Other Non-guarantor Subsidiaries of Noble | Reportable Legal Entities
Operating revenues
Revenue from contract with customer	12,387	6,050
Operating costs and expenses
Cost of services	$ 9,395	$ 4,350

Condensed Consolidating Finan_6

Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net cash provided by (used in) operating activities	$ (40,775)	$ 54,913
Cash flows from investing activities
Capital expenditures	(96,793)	(33,816)
Proceeds from disposal of assets, net	7,930	117
Net cash used in investing activities	(88,863)	(33,699)
Cash flows from financing activities
Borrowings on credit facilities	350,000	0
Repayment of long-term debt	(400,000)	(952,209)
Issuance of senior notes	0	750,000
Debt issuance costs	(90)	(14,184)
Dividends paid to noncontrolling interests	(5,020)	(2,667)
Net cash used in financing activities	(57,873)	(222,365)
Net decrease in cash, cash equivalents and restricted cash	(187,511)	(201,151)
Cash, cash equivalents and restricted cash, beginning of period	375,907	662,829
Cash, cash equivalents and restricted cash, end of period	188,396	461,678
Noble Corp
Cash flows from operating activities
Net cash provided by (used in) operating activities	(30,682)	64,897
Cash flows from investing activities
Capital expenditures	(96,793)	(33,816)
Proceeds from disposal of assets, net	7,930	117
Notes receivable from affiliates	0
Net cash used in investing activities	(88,863)	(33,699)
Cash flows from financing activities
Borrowings on credit facilities	350,000	0
Repayment of long-term debt	(400,000)	(952,209)
Issuance of senior notes	0	750,000
Debt issuance costs	(90)	(14,184)
Dividends paid to noncontrolling interests	(5,020)	(2,667)
Distributions to parent company, net	(12,077)	(13,318)
Advances (to) from affiliates	0	0
Notes payable to affiliates	0
Net cash used in financing activities	(67,187)	(232,378)
Net decrease in cash, cash equivalents and restricted cash	(186,732)	(201,180)
Cash, cash equivalents and restricted cash, beginning of period	375,050	662,011
Cash, cash equivalents and restricted cash, end of period	188,318	460,831
Noble Corp | Consolidating Adjustments
Cash flows from operating activities
Net cash provided by (used in) operating activities	0	0
Cash flows from investing activities
Capital expenditures	0	0
Proceeds from disposal of assets, net	0	0
Notes receivable from affiliates	43,000
Net cash used in investing activities	43,000	0
Cash flows from financing activities
Borrowings on credit facilities	0
Repayment of long-term debt	0	0
Issuance of senior notes		0
Debt issuance costs	0	0
Dividends paid to noncontrolling interests	0	0
Distributions to parent company, net	0	0
Advances (to) from affiliates	0	0
Notes payable to affiliates	(43,000)
Net cash used in financing activities	(43,000)	0
Net decrease in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash, beginning of period	0	0
Cash, cash equivalents and restricted cash, end of period	0	0
Noble Corp | Noble-Cayman | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	2,973	7,313
Cash flows from investing activities
Capital expenditures	0	0
Proceeds from disposal of assets, net	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Borrowings on credit facilities	300,000
Repayment of long-term debt	0	0
Issuance of senior notes		0
Debt issuance costs	0	(217)
Dividends paid to noncontrolling interests	0	0
Distributions to parent company, net	(12,077)	(13,318)
Advances (to) from affiliates	(290,895)	6,221
Notes payable to affiliates	0
Net cash used in financing activities	(2,972)	(7,314)
Net decrease in cash, cash equivalents and restricted cash	1	(1)
Cash, cash equivalents and restricted cash, beginning of period	0	11
Cash, cash equivalents and restricted cash, end of period	1	10
Noble Corp | NHIL | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	(110,170)	(135,393)
Cash flows from investing activities
Capital expenditures	0	0
Proceeds from disposal of assets, net	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Borrowings on credit facilities	0
Repayment of long-term debt	(400,000)	(738,555)
Issuance of senior notes		750,000
Debt issuance costs	0	(12,581)
Dividends paid to noncontrolling interests	0	0
Distributions to parent company, net	0	0
Advances (to) from affiliates	449,352	147,567
Notes payable to affiliates	43,000
Net cash used in financing activities	92,352	146,431
Net decrease in cash, cash equivalents and restricted cash	(17,818)	11,038
Cash, cash equivalents and restricted cash, beginning of period	17,818	29,324
Cash, cash equivalents and restricted cash, end of period	0	40,362
Noble Corp | Other Non-guarantor Subsidiaries of Noble | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	76,515	192,977
Cash flows from investing activities
Capital expenditures	(96,793)	(33,816)
Proceeds from disposal of assets, net	7,930	117
Notes receivable from affiliates	(43,000)
Net cash used in investing activities	(131,863)	(33,699)
Cash flows from financing activities
Borrowings on credit facilities	50,000
Repayment of long-term debt	0	(213,654)
Issuance of senior notes		0
Debt issuance costs	(90)	(1,386)
Dividends paid to noncontrolling interests	(5,020)	(2,667)
Distributions to parent company, net	0	0
Advances (to) from affiliates	(158,457)	(153,788)
Notes payable to affiliates	0
Net cash used in financing activities	(113,567)	(371,495)
Net decrease in cash, cash equivalents and restricted cash	(168,915)	(212,217)
Cash, cash equivalents and restricted cash, beginning of period	357,232	632,676
Cash, cash equivalents and restricted cash, end of period	$ 188,317	$ 420,459

Uncategorized Items - ne-201903

Label	Element	Value
Noble Corporation [Member]
Tax Cuts And Jobs Act Of 2017, Reclassification From Aoci To Retained Earnings, Tax Effect	ne_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	$ 0
Retained Earnings [Member]
Tax Cuts And Jobs Act Of 2017, Reclassification From Aoci To Retained Earnings, Tax Effect	ne_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	5,540,000
Retained Earnings [Member] | Noble Corporation [Member]
Tax Cuts And Jobs Act Of 2017, Reclassification From Aoci To Retained Earnings, Tax Effect	ne_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	5,540,000
AOCI Attributable to Parent [Member] | Noble Corporation [Member]
Tax Cuts And Jobs Act Of 2017, Reclassification From Aoci To Retained Earnings, Tax Effect	ne_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	$ (5,540,000)