10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended: September 30, 2012

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                    to                     

Commission file number: 000-53604

NOBLE CORPORATION

(Exact name of registrant as specified in its charter)

Switzerland	98-0619597
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification number)

Dorfstrasse 19A, Baar, Switzerland 6340

(Address of principal executive offices) (Zip Code)

Registrant’s Telephone Number, Including Area Code: 41 (41) 761-65-55

Commission file number: 001-31306

NOBLE CORPORATION

(Exact name of registrant as specified in its charter)

Cayman Islands	98-0366361
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification number)

Suite 3D, Landmark Square, 64 Earth Close, P.O. Box 31327 George Town, Grand Cayman, Cayman Islands, KY1-1206

(Address of principal executive offices) (Zip Code)

Registrant’s Telephone Number, Including Area Code: (345) 938-0293

Indicate by check mark whether each registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether each registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether each registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Noble-Swiss:	Large accelerated filer x	Accelerated filer ¨	Non-accelerated filer ¨	Smaller reporting company ¨
Noble-Cayman:	Large accelerated filer ¨	Accelerated filer ¨	Non-accelerated filer x	Smaller reporting company ¨

Indicate by check mark whether each registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    No  x

Number of shares outstanding and trading at October 31, 2012: Noble Corporation (Switzerland) — 252,720,353

Number of shares outstanding at October 31, 2012: Noble Corporation (Cayman Islands) — 261,245,693

Noble Corporation, a Cayman Islands company and a wholly owned subsidiary of Noble Corporation, a Swiss corporation, meets the conditions set forth in General Instructions H(1) (a) and (b) to Form 10-Q and is therefore filing this Form 10-Q with the reduced disclosure format contemplated by paragraphs (b) and (c) of General Instruction H(2) of Form 10-Q.

TABLE OF CONTENTS

		Page
PART I	FINANCIAL INFORMATION
Item 1	Financial Statements
	Noble Corporation (Noble-Swiss) Financial Statements:
	Consolidated Balance Sheet as of September 30, 2012 and December 31, 2011		3
	Consolidated Statement of Income for the three and nine months ended September 30, 2012 and 2011		4
	Consolidated Statement of Comprehensive Income for the three and nine months ended September  30, 2012 and 2011		5
	Consolidated Statement of Cash Flows for the nine months ended September 30, 2012 and 2011		6
	Consolidated Statement of Equity for the nine months ended September 30, 2012 and 2011		7
	Noble Corporation (Noble-Cayman) Financial Statements:
	Consolidated Balance Sheet as of September 30, 2012 and December 31, 2011		8
	Consolidated Statement of Income for the three and nine months ended September 30, 2012 and 2011		9
	Consolidated Statement of Comprehensive Income for the three and nine months ended September  30, 2012 and 2011		10
	Consolidated Statement of Cash Flows for the nine months ended September 30, 2012 and 2011		11
	Consolidated Statement of Equity for the nine months ended September 30, 2012 and 2011		12
	Notes to Combined Consolidated Financial Statements		13
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations		36
Item 3	Quantitative and Qualitative Disclosures About Market Risk		50
Item 4	Controls and Procedures		51
PART II	OTHER INFORMATION
Item 1	Legal Proceedings		52
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds		52
Item 6	Exhibits		52
	SIGNATURES		53
	Index to Exhibits		54

This combined Quarterly Report on Form 10-Q is separately filed by Noble Corporation, a Swiss corporation (“Noble-Swiss”), and Noble Corporation, a Cayman Islands company (“Noble-Cayman”). Information in this filing relating to Noble-Cayman is filed by Noble-Swiss and separately by Noble-Cayman on its own behalf. Noble-Cayman makes no representation as to information relating to Noble-Swiss (except as it may relate to Noble-Cayman) or any other affiliate or subsidiary of Noble-Swiss. Since Noble-Cayman meets the conditions specified in General Instructions H(1)(a) and (b) to Form 10-Q, it is permitted to use the reduced disclosure format for wholly owned subsidiaries of reporting companies. Accordingly, Noble-Cayman has omitted from this report the information called for by Item 3 (Quantitative and Qualitative Disclosures about Market Risk) of Part I of Form 10-Q and the following items of Part II of Form 10-Q: Item 2 (Unregistered Sales of Equity Securities and Use of Proceeds) and Item 3 (Defaults upon Senior Securities).

This report should be read in its entirety as it pertains to each Registrant. Except where indicated, the Consolidated Financial Statements and related Notes are combined. References in this Quarterly Report on Form 10-Q to “Noble,” the “Company,” “we,” “us,” “our” and words of similar meaning refer collectively to Noble-Swiss and its consolidated subsidiaries, including Noble-Cayman.

2

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEET

(In thousands)

(Unaudited)

	September 30, 2012			December 31, 2011
ASSETS
Current assets
Cash and cash equivalents	$	218,467		$	239,196
Accounts receivable		791,408			587,163
Taxes receivable		118,540			75,284
Prepaid expenses		64,644			35,796
Other current assets		111,433			122,173
Total current assets		1,304,492			1,059,612
Property and equipment, at cost		16,637,626			15,540,178
Accumulated depreciation		(3,825,482	)		(3,409,833	)
Property and equipment, net		12,812,144			12,130,345
Other assets		343,770			305,202
Total assets	$	14,460,406		$	13,495,159
LIABILITIES AND EQUITY
Current liabilities
Accounts payable	$	298,363		$	436,006
Accrued payroll and related costs		145,595			117,907
Interest payable		23,851			54,419
Taxes payable		130,551			94,920
Dividends payable		99,582			—
Other current liabilities		144,267			123,928
Total current liabilities		842,209			827,180
Long-term debt		4,639,429			4,071,964
Deferred income taxes		235,851			242,791
Other liabilities		353,595			255,372
Total liabilities		6,071,084			5,397,307
Commitments and contingencies
Shareholders’ equity
Shares; 253,299 and 252,639 shares outstanding		709,993			766,595
Treasury shares, at cost; 586 and 287 shares		(20,986	)		(10,553	)
Additional paid-in capital		75,696			48,356
Retained earnings		6,938,434			6,676,444
Accumulated other comprehensive loss		(72,077	)		(74,321	)
Total shareholders’ equity		7,631,060			7,406,521
Noncontrolling interests		758,262			691,331
Total equity		8,389,322			8,097,852
Total liabilities and equity	$	14,460,406		$	13,495,159

See accompanying notes to the unaudited consolidated financial statements.

3

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF INCOME

(In thousands, except per share amounts)

(Unaudited)

	Three Months  Ended September 30,						Nine Months  Ended September 30,
	2012			2011			2012			2011
Operating revenues
Contract drilling services	$	833,212		$	704,892		$	2,427,759		$	1,837,047
Reimbursables		28,137			17,438			94,090			63,851
Labor contract drilling services		22,667			15,564			58,538			43,123
Other		16			8			258			766
		884,032			737,902			2,580,645			1,944,787
Operating costs and expenses
Contract drilling services		449,125			358,547			1,292,638			1,001,638
Reimbursables		21,047			13,971			76,618			49,797
Labor contract drilling services		12,991			8,053			34,070			25,326
Depreciation and amortization		195,087			166,213			549,779			487,454
Selling, general and administrative		26,858			27,536			75,388			72,883
Loss on impairment		—			—			18,345			—
Gain on contract settlements/extinguishments, net		—			—			(33,255	)		(21,202	)
		705,108			574,320			2,013,583			1,615,896
Operating income		178,924			163,582			567,062			328,891
Other income (expense)
Interest expense, net of amount capitalized		(25,635	)		(11,530	)		(56,783	)		(45,400	)
Interest income and other, net		1,553			1,117			4,526			3,175
Income before income taxes		154,842			153,169			514,805			286,666
Income tax provision		(25,162	)		(17,614	)		(93,107	)		(42,481	)
Net income		129,680			135,555			421,698			244,185
Net income attributable to noncontrolling interests		(14,906	)		(238	)		(26,931	)		(290	)
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Net income per share
Basic	$	0.45		$	0.53		$	1.55		$	0.96
Diluted	$	0.45		$	0.53		$	1.55		$	0.96

See accompanying notes to the unaudited consolidated financial statements.

4

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months  Ended September 30,						Nine Months  Ended September 30,
	2012			2011			2012			2011
Net income	$	129,680		$	135,555		$	421,698		$	244,185
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments		2,033			(4,929	)		(4,994	)		(547	)
Gain (loss) on foreign currency forward contracts		—			(9,654	)		3,061			(7,141	)
Loss on interest rate swaps		—			—			—			(366	)
Amortization of deferred pension plan amounts (net of tax provision of $790 and $356 for the three months ended September 30, 2012 and 2011, respectively, and $2,157 and $1,061 for the nine months ended September 30, 2012 and 2011, respectively)		1,351			687			4,177			2,062
Other comprehensive income/(loss), net		3,384			(13,896	)		2,244			(5,992	)
Net comprehensive income attributable to noncontrolling interests		(14,906	)		(238	)		(26,931	)		(290	)
Comprehensive income attributable to Noble Corporation	$	118,158		$	121,421		$	397,011		$	237,903

See accompanying notes to the unaudited consolidated financial statements.

5

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months  Ended September 30,
	2012			2011
Cash flows from operating activities
Net income	$	421,698		$	244,185
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		549,779			487,454
Loss on impairment		18,345			—
Gain on contract extinguishments, net		—			(21,202	)
Deferred income taxes		(16,090	)		(34,549	)
Amortization of share-based compensation		28,782			26,857
Net change in other assets and liabilities		(71,010	)		(243,715	)
Net cash from operating activities		931,504			459,030
Cash flows from investing activities
Capital expenditures		(1,247,139	)		(1,972,572	)
Change in accrued capital expenditures		(195,044	)		(48,782	)
Refund from contract extinguishments		—			18,642
Net cash from investing activities		(1,442,183	)		(2,002,712	)
Cash flows from financing activities
Change in bank credit facilities, net		(630,000	)		675,000
Proceeds from issuance of senior notes, net of debt issuance costs		1,186,636			1,087,833
Contributions from joint venture partners		40,000			481,000
Payments of joint venture debt		—			(693,494	)
Settlement of interest rate swaps		—			(29,032	)
Par value reduction/dividend payments		(105,092	)		(114,453	)
Financing costs on credit facilities		(5,014	)		(2,835	)
Proceeds from employee stock transactions		13,853			9,018
Repurchases of employee shares surrendered for taxes		(10,433	)		(10,211	)
Net cash from financing activities		489,950			1,402,826
Net change in cash and cash equivalents		(20,729	)		(140,856	)
Cash and cash equivalents, beginning of period		239,196			337,871
Cash and cash equivalents, end of period	$	218,467		$	197,015

See accompanying notes to the unaudited consolidated financial statements.

6

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF EQUITY

(In thousands)

(Unaudited)

	Shares						Additional Paid-in			Retained			Treasury			Accumulated Other Comprehensive			Noncontrolling		Total
	Balance			Par Value			Capital			Earnings			Shares			Loss			Interests		Equity
Balance at December 31, 2010		262,415		$	917,684		$	39,006		$	6,630,500		$	(373,967	)	$	(50,220	)	$	124,631	$	7,287,634
Employee related equity activity
Amortization of share-based compensation		—			—			26,857			—			—			—			—		26,857
Issuance of share-based compensation shares		248			844			(837	)		—			—			—			—		7
Exercise of stock options		490			1,629			7,104			—			—			—			—		8,733
Tax benefit of stock options exercised		—			—			278			—			—			—			—		278
Restricted shares forfeited or repurchased for taxes		(319	)		(1,107	)		1,107			—			(10,211	)		—			—		(10,211	)
Retirement of treasury shares		(10,116	)		(33,035	)					(340,612	)		373,647			—			—		—
Settlement of FIN48 provision		—			—						15,658			—			—			—		15,658
Net income		—			—			—			243,895			—			—			290		244,185
Par value reduction payments		—			(89,948	)		(24,505	)		—			—			—			—		(114,453	)
Equity contribution by joint venture partner		—			—			—			—			—			—			518,973		518,973
Other comprehensive loss, net		—			—			—			—			—			(5,992	)		—		(5,992	)
Balance at September 30, 2011		252,718		$	796,067		$	49,010		$	6,549,441		$	(10,531	)	$	(56,212	)	$	643,894	$	7,971,669
Balance at December 31, 2011		252,639		$	766,595		$	48,356		$	6,676,444		$	(10,553	)	$	(74,321	)	$	691,331	$	8,097,852
Employee related equity activity
Amortization of share-based compensation		—			—			28,782			—			—			—			—		28,782
Issuance of share-based compensation shares		428			1,284			(1,276	)		—			—			—			—		8
Exercise of stock options		606			1,722			10,949			—			—			—			—		12,671
Tax benefit of stock options exercised		—			—			1,174			—			—			—			—		1,174
Restricted shares forfeited or repurchased for taxes		(374	)		(1,138	)		1,138			—			(10,433	)		—			—		(10,433	)
Net income		—			—			—			394,767			—			—			26,931		421,698
Equity contribution by joint venture partner		—			—			—			—			—			—			40,000		40,000
Par value reduction/dividend payments		—			(58,470	)		(13,427	)		(33,195	)		—			—			—		(105,092	)
Dividends payable		—			—			—			(99,582	)		—			—			—		(99,582	)
Other comprehensive income, net		—			—			—			—			—			2,244			—		2,244
Balance at September 30, 2012		253,299		$	709,993		$	75,696		$	6,938,434		$	(20,986	)	$	(72,077	)	$	758,262	$	8,389,322

See accompanying notes to the unaudited consolidated financial statements.

7

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEET

(In thousands)

(Unaudited)

	September 30, 2012			December 31, 2011
ASSETS
Current assets
Cash and cash equivalents	$	213,681		$	235,056
Accounts receivable		791,408			587,163
Taxes receivable		118,354			75,284
Prepaid expenses		61,536			33,105
Other current assets		111,433			120,109
Total current assets		1,296,412			1,050,717
Property and equipment, at cost		16,601,975			15,505,994
Accumulated depreciation		(3,818,729	)		(3,404,589	)
Property and equipment, net		12,783,246			12,101,405
Other assets		343,852			305,283
Total assets	$	14,423,510		$	13,457,405
LIABILITIES AND EQUITY
Current liabilities
Accounts payable	$	297,969		$	435,729
Accrued payroll and related costs		134,010			108,908
Interest payable		23,851			54,419
Taxes payable		126,112			91,190
Other current liabilities		144,267			123,399
Total current liabilities		726,209			813,645
Long-term debt		4,639,429			4,071,964
Deferred income taxes		235,851			242,791
Other liabilities		353,595			255,372
Total liabilities		5,955,084			5,383,772
Commitments and contingencies
Shareholder equity
Ordinary shares; 261,246 shares outstanding		26,125			26,125
Capital in excess of par value		466,028			450,616
Retained earnings		7,290,088			6,979,882
Accumulated other comprehensive loss		(72,077	)		(74,321	)
Total shareholder equity		7,710,164			7,382,302
Noncontrolling interests		758,262			691,331
Total equity		8,468,426			8,073,633
Total liabilities and equity	$	14,423,510		$	13,457,405

See accompanying notes to the unaudited consolidated financial statements.

8

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF INCOME

(In thousands)

(Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Operating revenues
Contract drilling services	$	833,212		$	704,892		$	2,427,759		$	1,837,047
Reimbursables		28,137			17,438			94,090			63,851
Labor contract drilling services		22,667			15,564			58,538			43,123
Other		16			8			258			766
		884,032			737,902			2,580,645			1,944,787
Operating costs and expenses
Contract drilling services		444,225			349,626			1,280,969			980,662
Reimbursables		21,047			13,971			76,618			49,797
Labor contract drilling services		12,991			8,053			34,070			25,326
Depreciation and amortization		194,595			165,719			548,271			486,010
Selling, general and administrative		15,487			17,637			44,964			48,810
Loss on impairment		—			—			18,345			—
Gain on contract settlements/extinguishments, net		—			—			(33,255	)		(21,202	)
		688,345			555,006			1,969,982			1,569,403
Operating income		195,687			182,896			610,663			375,384
Other income (expense)
Interest expense, net of amount capitalized		(25,635	)		(11,530	)		(56,783	)		(45,400	)
Interest income and other, net		1,361			1,884			4,368			3,978
Income before income taxes		171,413			173,250			558,248			333,962
Income tax provision		(24,784	)		(17,298	)		(91,972	)		(41,480	)
Net income		146,629			155,952			466,276			292,482
Net income attributable to noncontrolling interests		(14,906	)		(238	)		(26,931	)		(290	)
Net income attributable to Noble Corporation	$	131,723		$	155,714		$	439,345		$	292,192

See accompanying notes to the unaudited consolidated financial statements.

9

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Net income	$	146,629		$	155,952		$	466,276		$	292,482
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments		2,033			(4,929	)		(4,994	)		(547	)
Gain (loss) on foreign currency forward contracts		—			(9,654	)		3,061			(7,141	)
Loss on interest rate swaps		—			—			—			(366	)
Amortization of deferred pension plan amounts (net of tax provision of $790 and $356 for the three months ended September 30, 2012 and 2011, respectively, and $2,157 and $1,061 for the nine months ended September 30, 2012 and 2011, respectively)		1,351			687			4,177			2,062
Other comprehensive income/(loss), net		3,384			(13,896	)		2,244			(5,992	)
Net comprehensive income attributable to noncontrolling interests		(14,906	)		(238	)		(26,931	)		(290	)
Comprehensive income attributable to Noble Corporation	$	135,107		$	141,818		$	441,589		$	286,200

See accompanying notes to the unaudited consolidated financial statements.

10

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended September 30,
	2012			2011
Cash flows from operating activities
Net income	$	466,276		$	292,482
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		548,271			486,010
Loss on impairment		18,345			—
Gain on contract extinguishments, net		—			(21,202	)
Deferred income taxes		(16,090	)		(34,549	)
Capital contribution by parent- shared-based compensation		15,412			15,150
Net change in other assets and liabilities		(75,357	)		(250,433	)
Net cash from operating activities		956,857			487,458
Cash flows from investing activities
Capital expenditures		(1,245,671	)		(1,967,618	)
Change in accrued capital expenditures		(195,044	)		(48,782	)
Refund from contract extinguishments		—			18,642
Net cash from investing activities		(1,440,715	)		(1,997,758	)
Cash flows from financing activities
Change in bank credit facilities, net		(630,000	)		675,000
Proceeds from issuance of senior notes, net of debt issuance costs		1,186,636			1,087,833
Contributions from joint venture partners		40,000			481,000
Payments of joint venture debt		—			(693,494	)
Settlement of interest rate swaps		—			(29,032	)
Financing costs on credit facilities		(5,014	)		(2,835	)
Distributions to parent company, net		(129,139	)		(149,566	)
Net cash from financing activities		462,483			1,368,906
Net change in cash and cash equivalents		(21,375	)		(141,394	)
Cash and cash equivalents, beginning of period		235,056			333,399
Cash and cash equivalents, end of period	$	213,681		$	192,005

See accompanying notes to the unaudited consolidated financial statements.

11

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF EQUITY

(In thousands)

(Unaudited)

										Accumulated
					Capital in					Other
	Shares				Excess of		Retained			Comprehensive			Noncontrolling		Total
	Balance		Par Value		Par Value		Earnings			Loss			Interests		Equity
Balance at December 31, 2010		261,246	$	26,125	$	416,232	$	6,743,887		$	(50,220	)	$	124,631	$	7,260,655
Net income		—		—		—		292,192			—			290		292,482
Capital contributions by parent— share-based compensation		—		—		15,150		—			—			—		15,150
Distributions to parent		—		—		—		(149,566	)		—			—		(149,566	)
Settlement of FIN48 provision		—		—		15,658		—			—			—		15,658
Noncontrolling interest contributions		—		—		—		—			—			518,973		518,973
Other comprehensive income, net		—		—		—		—			(5,992	)		—		(5,992	)
Balance at September 30, 2011		261,246	$	26,125	$	447,040	$	6,886,513		$	(56,212	)	$	643,894	$	7,947,360
Balance at December 31, 2011		261,246	$	26,125	$	450,616	$	6,979,882		$	(74,321	)	$	691,331	$	8,073,633
Net income		—		—		—		439,345			—			26,931		466,276
Capital contributions by parent— share-based compensation		—		—		15,412		—			—			—		15,412
Distributions to parent		—		—		—		(129,139	)		—			—		(129,139	)
Noncontrolling interest contributions		—		—		—		—			—			40,000		40,000
Other comprehensive loss, net		—		—		—		—			2,244			—		2,244
Balance at September 30, 2012		261,246	$	26,125	$	466,028	$	7,290,088		$	(72,077	)	$	758,262	$	8,468,426

See accompanying notes to the unaudited consolidated financial statements.

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NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Note 1 — Organization and Basis of Presentation

Noble Corporation, a Swiss corporation (“Noble-Swiss”), is a leading provider of offshore contract drilling services for the oil and gas industry. Our fleet of 79 mobile offshore drilling units consists of 14 semisubmersibles, 14 drillships, 49 jackups and two submersibles. Additionally, we have one floating production storage and offloading unit. Our fleet includes 11 units under construction as follows:

• five dynamically positioned, ultra-deepwater, harsh environment drillships and

• six high-specification heavy-duty, harsh environment jackup rigs.

Our global fleet is currently located in the following areas: the U.S. Gulf of Mexico and Alaska, Mexico, Brazil, the North Sea, the Mediterranean, West Africa, the Middle East, India, Australia and the Asian Pacific. Noble and its predecessors have been engaged in the contract drilling of oil and gas wells since 1921.

Noble Corporation, a Cayman Islands company (“Noble-Cayman”) is a direct, wholly-owned subsidiary of Noble-Swiss, our publicly-traded parent company. Noble-Swiss’ principal asset is all of the shares of Noble-Cayman. Noble-Cayman has no public equity outstanding. The consolidated financial statements of Noble-Swiss include the accounts of Noble-Cayman, and Noble-Swiss conducts substantially all of its business through Noble-Cayman and its subsidiaries.

The accompanying unaudited consolidated financial statements of Noble-Swiss 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 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, 2011 Consolidated Balance Sheets presented herein are derived from the December 31, 2011 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, 2011, filed by both Noble-Swiss and Noble-Cayman. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year.

Certain amounts in prior periods have been reclassified to conform to the current year presentation.

Note 2 — Consolidated Joint Ventures

We own 50 percent interests in two joint ventures, each with a subsidiary of Royal Dutch Shell, PLC (“Shell”), for the construction and operation of our two Bully-class drillships. Since these entities’ equity at risk is insufficient to permit them to carry on their activities without additional financial support, they each meet the criteria for a variable interest entity. We have determined that we are the primary beneficiary for accounting purposes. Accordingly, we consolidate the entities in our consolidated financial statements after eliminating intercompany transactions. Shell’s equity interests are presented as noncontrolling interests on our Consolidated Balance Sheets.

In April 2011, the Bully joint venture partners entered into capital contribution agreements whereby capital calls up to a total of $360 million can be made for funds needed to complete the construction of the drillships. All contributions under these agreements were made during 2011 and the first quarter of 2012. No amounts remain available under these agreements.

At September 30, 2012, the combined carrying amount of the drillships was $1.5 billion, which was primarily funded through partners’ equity contributions.

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NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Note 3 — Share Data

Share capital

The following is a detail of Noble-Swiss’ authorized share capital as of September 30, 2012 and December 31, 2011:

	September 30, 2012		December 31, 2011
Shares outstanding and trading		252,713		252,352
Treasury shares		586		287
Total shares outstanding		253,299		252,639
Treasury shares held for share-based compensation plans		12,851		13,511
Total shares authorized for issuance		266,150		266,150
Par value per share (in Swiss Francs)		3.15		3.41

Repurchased treasury shares are recorded at cost, and include both shares repurchased pursuant to our Board of Directors approved share repurchase program and shares surrendered by employees for taxes payable upon the vesting of restricted stock. The number of shares that we may hold in treasury is limited under Swiss law. At September 30, 2012, 6.8 million shares remained available for repurchase under the authorization by the Board of Directors noted above. No shares were repurchased under this authorization during the nine months ended September 30, 2012.

Our Board of Directors may further increase Noble-Swiss’ share capital through the issuance of up to 133.1 million authorized registered shares without obtaining shareholder approval. The issuance of these authorized registered shares is subject to certain conditions regarding their use.

In April 2012, our shareholders approved the payment of a dividend aggregating $0.52 per share to be paid in four equal installments the first of which was paid in August 2012, with the remaining three installments to be paid in November 2012, February 2013 and May 2013, respectively. These dividends will require us to make cash payments of approximately $33 million during the fourth quarter of 2012, based on the number of shares currently outstanding. As of September 30, 2012, we had $100 million of dividends payable outstanding on this obligation. Any additional issuances of shares would further increase our obligation.

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NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Earnings per share

The following table sets forth the computation of basic and diluted earnings per share for Noble-Swiss:

	Three months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
Allocation of net income
Basic
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Earnings allocated to unvested share-based payment awards		(1,192	)		(1,415	)		(4,008	)		(2,487	)
Net income to common shareholders—basic	$	113,582		$	133,902		$	390,759		$	241,408
Diluted
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Earnings allocated to unvested share-based payment awards		(1,190	)		(1,412	)		(4,002	)		(2,481	)
Net income to common shareholders—diluted	$	113,584		$	133,905		$	390,765		$	241,414
Weighted average shares outstanding—basic		252,657			251,580			252,339			251,327
Incremental shares issuable from assumed exercise of stock options		317			449			385			640
Weighted average shares outstanding—diluted		252,974			252,029			252,724			251,967
Weighted average unvested share-based payment awards		2,651			2,658			2,588			2,589
Earnings per share
Basic	$	0.45		$	0.53		$	1.55		$	0.96
Diluted	$	0.45		$	0.53		$	1.55		$	0.96

Only those items having a dilutive impact on our basic earnings per share are included in diluted earnings per share. At both September 30, 2012 and 2011, stock options totaling approximately 1.1 million were excluded from the diluted earnings per share as they were not dilutive.

Note 4 — Property and Equipment

Property and equipment, at cost, as of September 30, 2012 and December 31, 2011 consisted of the following:

	September 30,		December 31,
	2012		2011
Drilling equipment and facilities	$	13,449,855	$	10,974,943
Construction in progress		2,991,487		4,367,750
Other		196,284		197,485
	$	16,637,626	$	15,540,178

Capital expenditures, including capitalized interest, totaled $1.2 billion and $2.0 billion for the nine months ended September 30, 2012 and 2011, respectively. Capital expenditures for the first nine months of 2012 consisted of the following:

• $441 million for newbuild construction;

• $548 million for major projects, including $50 million in subsea related expenditures and $29 million to upgrade two drillships currently operating in Brazil;

• $150 million for other capitalized expenditures, including upgrades and replacements to drilling equipment, that generally have a useful life ranging from 3 to 5 years; and

• $108 million in capitalized interest.

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NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Interest is capitalized on construction-in-progress at the weighted average cost of debt outstanding during the period of construction. Capitalized interest was $31 million and $108 million for the three and nine months ended September 30, 2012, respectively, as compared to $32 million and $88 million for the three and nine months ended September 30, 2011.

Note 5 — Loss on Impairment

During the second quarter of 2012, we determined that our submersible rig fleet, consisting of two cold stacked rigs, was partially impaired due to the declining market outlook for drilling services for this rig type. We estimated the fair value of the rigs based on the salvage value of the rigs and a recent transaction involving a similar unit owned by a peer company (Level 2 fair value measurement). Based on these estimates, we recognized a charge of approximately $13 million for the nine months ended September 30, 2012.

Also, during the second quarter of 2012, we determined that certain corporate assets were partially impaired due to a declining market for, and the potential disposal of, the assets. We estimated the fair value of the asset based on recent transactions involving similar units in the market (Level 2 fair value measurement). Based on these estimates, we recognized a charge of approximately $5 million for the nine months ended September 30, 2012.

Note 6 — Gain on Contract Settlements/Extinguishments, net

During the second quarter of 2012, we received approximately $5 million from the settlement of a claim relating to the Noble David Tinsley, which had experienced a “punch-through” while being positioned on location in 2009. We had originally recorded a $17 million charge during 2009 related to this incident. Additionally, during the second quarter of 2012, we settled an action against certain vendors for damages sustained during Hurricane Ike. We recognized a net gain of approximately $28 million related to this settlement. We also resolved all outstanding matters with Anadarko Petroleum Company (“Anadarko”) related to the previously disclosed force majeure action, Hurricane Ike matters and receivables relating to the Noble Amos Runner.

In January 2011, we announced the signing of a Memorandum of Understanding (“MOU”) with Petroleo Brasileiro S.A. (“Petrobras”) regarding operations in Brazil. Under the terms of the MOU, we agreed to substitute the Noble Phoenix, then under contract with Shell in Southeast Asia, for the Noble Muravlenko. In connection with the cancellation of the contract on the Noble Phoenix, we recognized a non-cash gain of approximately $52.5 million during the first quarter of 2011, which represented the unamortized fair value of the in-place contract at acquisition. As a result of the substitution, we reached a decision not to proceed with the previously announced reliability upgrade to the Noble Muravlenko that was scheduled to take place in 2013, and therefore, incurred a non-cash charge of approximately $32.6 million related to the termination of outstanding shipyard contracts. The substitution was completed during the fourth quarter of 2012.

In February 2011, the outstanding balances of the Bully joint venture credit facilities, which totaled $693 million, were repaid in full and the credit facilities terminated using a portion of the proceeds from our February 2011 debt offering and equity contributions from our joint venture partner. In addition, the related interest rate swaps were settled and terminated concurrent with the repayment and termination of the credit facilities. As a result of these transactions, we recognized a gain of approximately $1.3 million during the first quarter of 2011.

Note 7 — Receivables from Customers

In June 2010, a subsidiary of Frontier, which we acquired in July 2010, entered into a charter contract with a subsidiary of BP PLC (“BP”) for the Seillean with a term of a minimum of 100 days. The unit went on hire on July 23, 2010. In October 2010, BP initiated an arbitration proceeding against us claiming the contract was void ab initio, or never existed, due to a fundamental breach and has made other claims and demanded that we reimburse the amounts already paid to us under the charter. We believe BP owes us the amounts due under the charter. The charter contained a “hell or high water” provision requiring payment, and we believe we satisfied our obligations under the charter. Outstanding receivables related to this charter totaled $35 million as of September 30, 2012. We recently received a favorable summary judgment ruling upholding the charter agreement and requiring BP to pay us the outstanding amounts, however, this matter has not been finally resolved because the ruling allows BP the opportunity to make a damages claim under the charter agreement. These receivables continue to be classified as long-term and are included in “Other assets” on our Consolidated Balance Sheet. We can make no assurances as to the outcome of this dispute.

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NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

At September 30, 2012, we had receivables of approximately $14 million related to the Noble Max Smith, which are being disputed by our customer, Pemex Exploracion y Produccion (“Pemex”). These receivables have been classified as long-term and are included in “Other assets” on our Consolidated Balance Sheet. The disputed amount relates to lost revenues for downtime that occurred after our rig was damaged when one of Pemex’s supply boats collided with our rig. In January 2012, we filed a lawsuit against Pemex in Mexican court seeking recovery of these amounts. While we can make no assurances as to the outcome of this dispute, we believe we are entitled to the disputed amounts.

Note 8 — Debt

Total debt consisted of the following at September 30, 2012 and December 31, 2011:

	September 30, 2012		December 31, 2011
Wholly-owned debt instruments:
5.875% Senior Notes due 2013	$	299,975	$	299,949
7.375% Senior Notes due 2014		249,760		249,647
3.45% Senior Notes due 2015		350,000		350,000
3.05% Senior Notes due 2016		299,948		299,938
2.50% Senior Notes due 2017		299,844		—
7.50% Senior Notes due 2019		201,695		201,695
4.90% Senior Notes due 2020		498,870		498,783
4.625% Senior Notes due 2021		399,515		399,480
3.95% Senior Notes due 2022		399,075		—
6.20% Senior Notes due 2040		399,891		399,890
6.05% Senior Notes due 2041		397,605		397,582
5.25% Senior Notes due 2042		498,251		—
Credit facilities		345,000		975,000
Total long-term debt	$	4,639,429	$	4,071,964

During June 2012, we replaced our $575 million credit facility scheduled to mature in 2013, with a new $1.2 billion credit facility, which matures in 2017. The new facility, combined with our existing $600 million credit facility that matures in 2015, gives us a total borrowing capacity under the two facilities (together referred to as the “Credit Facilities”) of $1.8 billion. The covenants and events of default under the Credit Facilities are substantially similar, and each facility contains a covenant that limits our ratio of debt to total tangible capitalization, as defined in the Credit Facilities, to 0.60. At September 30, 2012, our ratio of debt to total tangible capitalization was less than 0.36. We were in compliance with all covenants under the Credit Facilities as of September 30, 2012.

The Credit Facilities provide us with the ability to issue up to $375 million in letters of credit in the aggregate. The issuance of letters of credit does not increase our borrowings outstanding under the Credit Facilities, but it does reduce the amount available. At September 30, 2012, we had no letters of credit outstanding under the Credit Facilities.

During September 2012, we established a commercial paper program, which will allow us to issue up to $1.8 billion in unsecured commercial paper notes. Amounts issued under the commercial paper program are supported by the unused committed capacity under our Credit Facilities and, as such, are classified as long-term on our balance sheet. Subsequent to September 30, 2012, we began issuing notes under the program and had outstanding notes totaling $328 million as of October 31, 2012.

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NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

In February 2012, we issued, through our indirect wholly-owned subsidiary, Noble Holding International Limited (“NHIL”), $1.2 billion aggregate principal amount of senior notes in three separate tranches, with $300 million of 2.50% Senior Notes due 2017, $400 million of 3.95% Senior Notes due 2022, and $500 million of 5.25% Senior Notes due 2042. The weighted average coupon of all three tranches is 4.13%. The net proceeds of approximately $1.19 billion, after expenses, were primarily used to repay the then outstanding balance on our Credit Facilities.

Our 5.875% Senior Notes mature during the second quarter of 2013. We anticipate using availability under our Credit Facilities to repay the outstanding balance; therefore, we continue to report the balance as long-term at September 30, 2012.

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. In addition, there are restrictions on incurring or assuming certain liens and sale and lease-back transactions. At September 30, 2012, we were in compliance with all our debt covenants. We continually monitor compliance with the covenants under our Credit Facilities and senior notes and, based on our expectations for 2012, expect to remain in compliance during the year.

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 senior notes 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 following table presents the estimated fair value of our long-term debt as of September 30, 2012 and December 31, 2011.

	September 30, 2012				December 31, 2011
	Carrying		Estimated		Carrying		Estimated
	Value		Fair Value		Value		Fair Value
Wholly-owned debt instruments
5.875% Senior Notes due 2013	$	299,975	$	308,949	$	299,949	$	317,586
7.375% Senior Notes due 2014		249,760		272,063		249,647		278,966
3.45% Senior Notes due 2015		350,000		369,921		350,000		363,571
3.05% Senior Notes due 2016		299,948		314,142		299,938		306,057
2.50% Senior Notes due 2017		299,844		309,118		—		—
7.50% Senior Notes due 2019		201,695		249,768		201,695		248,623
4.90% Senior Notes due 2020		498,870		559,783		498,783		531,437
4.625% Senior Notes due 2021		399,515		440,799		399,480		416,847
3.95% Senior Notes due 2022		399,075		420,137		—		—
6.20% Senior Notes due 2040		399,891		466,331		399,890		450,017
6.05% Senior Notes due 2041		397,605		461,733		397,582		443,308
5.25% Senior Notes due 2042		498,251		533,637		—		—
Credit Facilities		345,000		345,000		975,000		975,000
Total long-term debt	$	4,639,429	$	5,051,381	$	4,071,964	$	4,331,412

Note 9 — Income Taxes

At December 31, 2011, the reserves for uncertain tax positions totaled $118 million (net of related tax benefits of $8 million). At September 30, 2012, the reserves for uncertain tax positions totaled $124 million (net of related tax benefits of $10 million). If the September 30, 2012 reserves are not realized, the provision for income taxes would be reduced by $124 million in future periods.

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NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

It is possible that our existing liabilities related to our reserve for uncertain tax positions may increase or decrease in the next twelve 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.

Note 10 — Employee Benefit Plans

Pension costs include the following components:

	Three Months Ended September 30,
	2012						2011
	Non-U.S.			U.S.			Non-U.S.			U.S.
Service cost	$	1,072		$	2,431		$	1,141		$	2,152
Interest cost		1,317			2,196			1,433			2,143
Return on plan assets		(1,313	)		(2,793	)		(1,449	)		(2,768	)
Amortization of prior service cost		—			57			—			57
Amortization of transition obligation		—			—			19			—
Recognized net actuarial loss		199			1,885			123			844
Net pension expense	$	1,275		$	3,776		$	1,267		$	2,428
	Nine Months Ended September 30,
	2012						2011
	Non-U.S.			U.S.			Non-U.S.			U.S.
Service cost	$	3,306		$	7,237		$	3,387		$	6,456
Interest cost		4,025			6,556			4,256			6,428
Return on plan assets		(4,001	)		(8,379	)		(4,306	)		(8,304	)
Amortization of prior service cost		—			171			—			170
Amortization of transition obligation		—			—			56			—
Recognized net actuarial loss		600			5,563			366			2,531
Net pension expense	$	3,930		$	11,148		$	3,759		$	7,281

During the three and nine months ended September 30, 2012, we made contributions to our pension plans totaling $3 million and $13 million, respectively. We expect the funding to our non-U.S. and U.S. plans in 2012, subject to applicable law, to be approximately $17 million.

Note 11 — Derivative Instruments and Hedging Activities

We periodically enter into derivative instruments to manage our exposure to fluctuations in interest rates and foreign currency exchange rates. We have documented policies and procedures to monitor and control the use of derivative instruments. We do not engage in derivative transactions for speculative or trading purposes, nor are we a party to leveraged derivatives. During the nine months ended September 30, 2011, we maintained certain foreign currency forward contracts that did not qualify under the Financial Accounting Standards Board (“FASB”) standards for hedge accounting treatment and therefore, changes in fair values were recognized as either income or loss in our consolidated income statement.

For foreign currency forward contracts, hedge effectiveness is evaluated at inception based on the matching of critical terms between derivative contracts and the hedged item. For interest rate swaps, we evaluate all material terms between the swap and the underlying debt obligation, known in FASB standards as the “long-haul method.” Any change in fair value resulting from ineffectiveness is recognized immediately in earnings.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Cash Flow Hedges

Our North Sea and Brazil operations have a significant amount of their cash operating expenses payable in local currencies. To limit the potential risk of currency fluctuations, we have historically maintained short-term forward contracts settling monthly in their respective local currencies. At September 30, 2012, we had no outstanding derivative contracts.

The balance of the net unrealized gain/(loss) related to our cash flow hedges included in “Accumulated other comprehensive loss” (“AOCL”) and related activity is as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
Net unrealized gain/(loss) at beginning of period	$	—	$	4,117		$	(3,061	)	$	1,970
Activity during period:
Settlement of foreign currency forward contracts during the period		—		(2,054	)		3,061			(1,604	)
Settlement of interest rate swaps during the period		—		—			—			(366	)
Net unrealized loss on outstanding foreign currency forward contracts		—		(7,600	)		—			(5,537	)
Net unrealized gain/(loss) at end of period	$	—	$	(5,537	)	$	—		$	(5,537	)

Financial Statement Presentation

The following tables, together with Note 12, summarize the financial statement presentation and fair value of our derivative positions as of September 30, 2012 and December 31, 2011:

		Estimated fair value
	Balance sheet classification	September 30, 2012		December 31, 2011
Liability derivatives
Cash flow hedges
Short-term foreign currency forward contracts	Other current liabilities	$	—	$	3,061

To supplement the fair value disclosures in Note 12, the following summarizes the recognized gains and losses of cash flow hedges and non-designated derivatives through AOCL or through “other income” for the three months ended September 30, 2012 and 2011:

	Gain/(loss) recognized through AOCL					Gain/(loss) reclassified from AOCL to  “other income”					Gain/(loss) recognized through “other income”
	2012		2011			2012		2011			2012		2011
Cash flow hedges
Foreign currency forward contracts	$	—	$	(7,600	)	$	—	$	(2,054	)	$	—	$	—

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

To supplement the fair value disclosures in Note 12, the following summarizes the recognized gains and losses of cash flow hedges and non-designated derivatives through AOCL or through “other income” for the nine months ended September 30, 2012 and 2011:

	Gain/(loss) recognized through AOCL					Gain/(loss) reclassified from AOCL to  “other income”					Gain/(loss) recognized through “other income”
	2012		2011			2012		2011			2012		2011
Cash flow hedges
Foreign currency forward contracts	$	—	$	(5,537	)	$	3,061	$	(1,604	)	$	—	$	—
Interest rate swaps		—		—			—		(366	)		—		—
Non-designated derivatives
Foreign currency forward contracts	$	—	$	—		$	—	$	—		$	—	$	(546	)

Note 12 — Fair Value of Financial Instruments

The following table presents the carrying amount and estimated fair value of our financial instruments recognized at fair value on a recurring basis:

	September 30, 2012								December 31, 2011
			Estimated Fair Value Measurements
			Quoted		Significant
			Prices in		Other		Significant
			Active		Observable		Unobservable
	Carrying		Markets		Inputs		Inputs		Carrying		Estimated
	Amount		(Level 1)		(Level 2)		(Level 3)		Amount		Fair Value
Assets—
Marketable securities	$	5,745	$	5,745	$	—	$	—	$	4,701	$	4,701
Liabilities—
Foreign currency forward contracts	$	—	$	—	$	—	$	—	$	3,061	$	3,061

At the time of valuation, the derivative instruments were valued using actively quoted prices and quotes obtained from the counterparties to the derivative instruments. Our cash and cash equivalents, accounts receivable and accounts payable are by their nature short-term. As a result, the carrying values included in the accompanying Consolidated Balance Sheets approximate fair value.

Note 13 — Commitments and Contingencies

The Noble Homer Ferrington was under contract with a subsidiary of ExxonMobil Corporation (“ExxonMobil”), which entered into an assignment agreement with BP for a two-well farmout of the rig in Libya after successfully drilling two wells with the rig for ExxonMobil. In August 2010, BP attempted to terminate the assignment agreement claiming that the rig was not in the required condition, and ExxonMobil informed us that we must look to BP for payment of the dayrate during the assignment period. In August 2010, we initiated arbitration proceedings under the drilling contract against both BP and ExxonMobil. We do not believe BP had the right to terminate the assignment agreement and believe the rig was ready to operate under the drilling contract. The rig operated under farmout arrangements from March 2011 to the conclusion of the contract in the second quarter of 2012. We believe we are owed dayrate by either or both of these clients. The operating dayrate was approximately $538,000 per day for the work in Libya. The arbitration process is proceeding, and we intend to vigorously pursue these claims. As a result of the uncertainties noted above, we have not recognized any revenue during the assignment period and the matter could have a material positive effect on our results of operations or cash flows in the period the matter is resolved should the arbitration panel ultimately rule in our favor.

21

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

In August 2007, we entered into a drilling contract with Marathon Oil Company (“Marathon”) for the Noble Jim Day to operate in the U.S. Gulf of Mexico. On January 1, 2011, Marathon provided notice that it was terminating the contract. Marathon’s stated reason for the termination was that the rig had not been accepted by Marathon by December 31, 2010, and Marathon also maintained that a force majeure condition existed under the contract. The contract contained a provision allowing Marathon to terminate if the rig had not commenced operations by December 31, 2010. We believe the rig was ready to commence operations and should have been accepted by Marathon. The contract term was for four years. No revenue has been recognized under this contract. We have contracted the rig for much of the original term with other customers. In March 2011, we filed suit in Texas State District Court against Marathon seeking damages for its actions. The suit is proceeding and is currently in the discovery phase. We cannot provide assurance as to the outcome of this lawsuit.

We are from time to time a party to various lawsuits that are incidental to our operations in which the claimants seek an unspecified amount of monetary damages for personal injury, including injuries purportedly resulting from exposure to asbestos on drilling rigs and associated facilities. At September 30, 2012, there were 29 asbestos related lawsuits in which we are one of many defendants. These lawsuits have been filed in the United States in the states of Louisiana, Mississippi and Texas. We intend to vigorously defend against the litigation. We do not believe the ultimate resolution of these matters will have a material adverse effect on our financial position, results of operations or cash flows.

We are a defendant in certain claims and litigation arising out of operations in the ordinary course of business, including certain disputes with customers over receivables discussed in Note 7, 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.

We operate in a number of countries throughout the world and our income tax returns filed in those jurisdictions are subject to review and examination by tax authorities within those jurisdictions. The U.S. Internal Revenue Service (“IRS”) has completed its audit examination of our 2008 U.S. tax return and proposed adjustments and deficiencies with respect to certain items that were reported by us for the 2008 tax year. We believe that we have accurately reported all amounts in our 2008 tax return, and have filed protests with the IRS Office of Appeals contesting the examination team’s proposed adjustments. A conference has been scheduled in December 2012 to discuss these items. We intend to vigorously defend our reported positions. Our 2009 tax return is under audit, and we expect to receive additional Information Document Requests in the coming months. During the third quarter, a U.S. subsidiary of Frontier concluded its audit with the IRS for its 2007 and 2008 tax returns, resulting in no change to income tax expense. Furthermore, we are currently contesting several non-U.S. tax assessments and may contest future assessments when we disagree with those assessments based on the technical merits of the positions established at the time of the filing of the tax return. We believe the ultimate resolution of the outstanding assessments, for which we have not made any accrual, will not have a material adverse effect on our consolidated financial statements. 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 the existing or future assessments.

Our Mexican income tax returns have been examined for the 2002 through 2007 periods and audit claims have been assessed for approximately $326 million (including interest and penalties). During 2011, we received from the Regional Chamber of the Federal Tax Court adverse decisions with respect to approximately $6 million in assessments related to depreciation deductions, which we are appealing. We are also contesting all other assessments in Mexico. Tax authorities in Mexico and other jurisdictions may issue additional assessments or pursue legal actions as a result of tax audits and we cannot predict or provide assurance as to the ultimate outcome of such assessments and legal actions.

Additional audit claims of approximately $91 million attributable to income, customs and other business taxes have been assessed against us in other jurisdictions. We have contested, or intend to contest, these assessments, including through litigation if necessary, and we believe the ultimate resolution, for which we have not made any accrual, will not have a material adverse effect on our consolidated financial statements.

22

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

We maintain certain insurance coverage against specified marine perils which includes physical damage and loss of hire. Damage caused by hurricanes has negatively impacted the energy insurance market, resulting in more restrictive and expensive coverage for U.S. named windstorm perils. Accordingly, we have elected to significantly reduce the named windstorm insurance on our rigs operating in the U.S. Gulf of Mexico. Presently we insure the Noble Jim Thompson, Noble Amos Runner and Noble Driller for “total loss only” when caused by a named windstorm. Our customer assumes the risk of loss on the Noble Bully I due to a named windstorm event up to $450 million per occurrence pursuant to the terms of the drilling contract relating to such vessel, provided that we are responsible for the first $25 million per occurrence for such named windstorm events. The remaining rigs in the U.S. Gulf of Mexico are self-insured for named windstorm perils. Our rigs located in the Mexico portion of the Gulf of Mexico remain covered by commercial insurance for windstorm damage. In addition, we maintain physical damage deductibles on our rigs ranging from $15 million to $25 million per occurrence, depending on location. The loss of hire coverage applies only to our rigs operating under contract with a dayrate equal to or greater than $200,000 a day and is subject to a 45-day waiting period for each unit and each occurrence.

Although we maintain insurance in the geographic areas in which we operate, pollution, reservoir damage and environmental risks generally are not fully insurable. Our insurance policies and contractual rights to indemnity may not adequately cover our losses or may have exclusions of coverage for some losses. We do not have insurance coverage or rights to indemnity for all risks, including loss of hire insurance on most of the rigs in our fleet. Uninsured exposures may include expatriate activities prohibited by U.S. laws and regulations, radiation hazards, certain loss or damage to property on board our rigs and losses relating to shore-based terrorist acts or strikes. If a significant accident or other event occurs and is not fully covered by insurance or contractual indemnity, it could materially adversely affect our financial position, results of operations or cash flows. Additionally, there can be no assurance that those parties with contractual obligations to indemnify us will necessarily be financially able to indemnify us against all these risks.

In January 2012, we were assessed a fine by the Brazilian government in the amount of R$1.8 million (approximately $887,000) in connection with the inadvertent discharge of drilling fluid from one of our rigs offshore Brazil in September 2011. We have accepted the assessment.

In October 2011, we were assessed a fine by the Brazilian government in the amount of R$238,000 (approximately $117,000) in connection with the inadvertent discharge of drilling fluid from one of our rigs offshore Brazil in November 2010. We have accepted the assessment.

We carry protection and indemnity insurance covering marine third party liability exposures, which also includes coverage for employer’s liability resulting from personal injury to our offshore drilling crews. Our protection and indemnity policy currently has a standard deductible of $10 million per occurrence, with maximum liability coverage of $750 million.

In connection with our capital expenditure program, we had outstanding commitments, including shipyard and purchase commitments of approximately $3.0 billion at September 30, 2012.

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-Swiss (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.

23

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Nigerian Operations

During the fourth quarter of 2007, our Nigerian subsidiary received letters from the Nigerian Maritime Administration and Safety Agency (“NIMASA”) seeking to collect a 2 percent surcharge on contract amounts under contracts performed by “vessels,” within the meaning of Nigeria’s cabotage laws, engaged in the Nigerian coastal shipping trade. Although we do not believe that these laws apply to our ownership of drilling units, NIMASA is seeking to apply a provision of the Nigerian cabotage laws (which became effective on May 1, 2004) to our offshore drilling units by considering these units to be “vessels” within the meaning of those laws and therefore subject to the surcharge, which is imposed only upon “vessels.” Our offshore drilling units are not engaged in the Nigerian coastal shipping trade and are not in our view “vessels” within the meaning of Nigeria’s cabotage laws. In January 2008, we filed an originating summons against NIMASA and the Minister of Transportation in the Federal High Court of Lagos, Nigeria seeking, among other things, a declaration that our drilling operations do not constitute “coastal trade” or “cabotage” within the meaning of Nigeria’s cabotage laws and that our offshore drilling units are not “vessels” within the meaning of those laws. In February 2009, NIMASA filed suit against us in the Federal High Court of Nigeria seeking collection of the cabotage surcharge. In August 2009, the court issued a favorable ruling in response to our originating summons stating that drilling operations do not fall within the cabotage laws and that drilling rigs are not vessels for purposes of those laws. The court also issued an injunction against the defendants prohibiting their interference with our drilling rigs or drilling operations. NIMASA has appealed the court’s ruling, although the court dismissed NIMASA’s lawsuit filed against us in February 2009. We intend to take all further appropriate legal action to resist the application of Nigeria’s cabotage laws to our drilling units. The outcome of any such legal action and the extent to which we may ultimately be responsible for the surcharge is uncertain. If it is ultimately determined that offshore drilling units constitute vessels within the meaning of the Nigerian cabotage laws, we may be required to pay the surcharge and comply with other aspects of the Nigerian cabotage laws, which could adversely affect our operations in Nigerian waters and require us to incur additional costs of compliance.

NIMASA had previously informed the Nigerian Content Division of its position that we were not in compliance with the cabotage laws. The Nigerian Content Division makes determinations of companies’ compliance with applicable local content regulations for purposes of government contracting, including contracting for services in connection with oil and gas concessions where the Nigerian national oil company is a partner. The Nigerian Content Division had previously barred us from participating in new tenders as a result of NIMASA’s allegations, although the Division reversed its actions based on the favorable Federal High Court ruling. However, no assurance can be given with respect to our ability to bid for future work in Nigeria until our dispute with NIMASA is resolved.

As previously disclosed, in November 2010 we finalized settlements with the SEC and the Department of Justice as the result of an internal investigation of the legality under the United States Foreign Corrupt Practices Act (“FCPA”) and local laws of certain reimbursement payments made by our Nigerian affiliate to our customs agents in Nigeria. In January 2011, a subsidiary of Noble-Swiss resolved an investigation by the Nigerian Economic and Financial Crimes Commission and the Nigerian Attorney General Office into these same activities. Any additional investigation by these or other agencies could damage our reputation and result in substantial fines, sanctions, civil and/or criminal penalties and curtailment of operations in certain jurisdictions and might adversely affect our business, results of operations or financial condition. Further, resolving any additional investigations could be expensive and consume significant time and attention of our senior management.

Under the Nigerian Industrial Training Fund Act of 2004, as amended, (the “Act”), Nigerian companies with five or more employees must contribute annually one percent of their payroll to the Industrial Training Fund (“ITF”) established under the Act to be used for the training of Nigerian nationals with a view towards generating a pool of indigenously trained manpower. We have not paid this amount on our expatriate workers employed by our non-Nigerian employment entity in the past as we did not believe the contribution obligation was applicable to them. In October 2012, we received a demand from the ITF for payments going back to 2004 and associated penalties in respect of these expatriate employees. We do not believe that we owe the amount claimed and that, in the event we were to have any liability, it would be for an immaterial amount. We continue to investigate the matter and are also engaged in discussions with the ITF to resolve the issue.

Note 14 — Segment and Related Information

We report our contract drilling operations as a single reportable segment, Contract Drilling Services, which reflects how we manage our business, and the fact that all of our drilling fleet is dependent upon the worldwide oil and gas industry. The mobile offshore drilling units comprising our offshore rig fleet operate in a single, global market for contract drilling services and are often redeployed globally in response to changing demands of our customers, which consist largely of major non-U.S. and government owned/controlled oil and gas companies throughout the world. Our Contract Drilling Services segment currently conducts contract drilling operations principally in the U.S. Gulf of Mexico, Mexico, Brazil, the North Sea, the Mediterranean, West Africa, the Middle East, India, Australia and the Asian Pacific.

24

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

We evaluate the performance of our operating segment primarily based on operating revenues and net income. Summarized financial information of our reportable segments for the three and nine months ended September 30, 2012 and 2011 for Noble-Swiss and Noble-Cayman are shown in the following table. The “Other” column includes results of labor contract drilling services in Canada and Alaska, as well as corporate related items.

	Noble-Swiss
	Three Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	860,315		$	23,717		$	884,032		$	719,546		$	18,356		$	737,902
Depreciation and amortization		191,638			3,449			195,087			162,837			3,376			166,213
Segment operating income		173,285			5,639			178,924			159,588			3,994			163,582
Interest expense, net of amount capitalized		(121	)		(25,514	)		(25,635	)		(122	)		(11,408	)		(11,530	)
Income tax (provision) / benefit		(28,307	)		3,145			(25,162	)		(18,380	)		766			(17,614	)
Segment profit / (loss)		130,983			(16,209	)		114,774			141,199			(5,882	)		135,317
Total assets (at end of period)		13,983,223			477,183			14,460,406			12,472,018			479,515			12,951,533

	Noble-Cayman
	Three Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	860,315		$	23,717		$	884,032		$	719,546		$	18,356		$	737,902
Depreciation and amortization		191,638			2,957			194,595			162,837			2,882			165,719
Segment operating income		178,185			17,502			195,687			168,509			14,387			182,896
Interest expense, net of amount capitalized		(121	)		(25,514	)		(25,635	)		(122	)		(11,408	)		(11,530	)
Income tax (provision) / benefit		(28,307	)		3,523			(24,784	)		(18,380	)		1,082			(17,298	)
Segment profit / (loss)		135,883			(4,160	)		131,723			150,120			5,594			155,714
Total assets (at end of period)		13,983,223			440,287			14,423,510			12,472,018			439,780			12,911,798

25

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

	Noble-Swiss
	Nine Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	2,519,930		$	60,715		$	2,580,645		$	1,897,045		$	47,742		$	1,944,787
Depreciation and amortization		539,698			10,081			549,779			477,568			9,886			487,454
Segment operating income		559,713			7,349			567,062			321,613			7,278			328,891
Interest expense, net of amount capitalized		(315	)		(56,468	)		(56,783	)		(1,890	)		(43,510	)		(45,400	)
Income tax (provision) / benefit		(102,005	)		8,898			(93,107	)		(48,661	)		6,180			(42,481	)
Segment profit / (loss)		434,561			(39,794	)		394,767			272,488			(28,593	)		243,895
Total assets (at end of period)		13,983,223			477,183			14,460,406			12,472,018			479,515			12,951,533

	Noble-Cayman
	Nine Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	2,519,930		$	60,715		$	2,580,645		$	1,897,045		$	47,742		$	1,944,787
Depreciation and amortization		539,698			8,573			548,271			477,568			8,442			486,010
Segment operating income		571,382			39,281			610,663			342,589			32,795			375,384
Interest expense, net of amount capitalized		(315	)		(56,468	)		(56,783	)		(1,890	)		(43,510	)		(45,400	)
Income tax (provision) / benefit		(102,005	)		10,033			(91,972	)		(48,661	)		7,181			(41,480	)
Segment profit / (loss)		446,230			(6,885	)		439,345			293,464			(1,272	)		292,192
Total assets (at end of period)		13,983,223			440,287			14,423,510			12,472,018			439,780			12,911,798

Note 15 — Accounting Pronouncements

In May 2011, the FASB issued Accounting Standards Update (“ASU”) No. 2011-04, which amends FASB Accounting Standards Codification (“ASC”) Topic 820, “Fair Value Measurements and Disclosures.” This amended guidance clarifies the wording used to describe many of the requirements in accounting literature for measuring fair value and for disclosing information about fair value measurements. The goal of the amendment is to create consistency between the United States and international accounting standards. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

In June 2011, the FASB issued ASU No. 2011-05, which amends ASC Topic 220, “Comprehensive Income.” This ASU allows an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendment no longer allows an entity to show changes to other comprehensive income solely through the statement of equity. For publicly traded entities, the guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. In December 2011, the FASB issued ASU No. 2011-12, which defers only those changes in ASU 2011-05 that relate to the presentation of reclassification adjustments. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

26

NOBLE CORPORATION (NOBLE-SWISS) AND SUBSIDIARIES

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share data)

Note 16 — Net Change in Other Assets and Liabilities

The net effect of changes in other assets and liabilities on cash flows from operating activities is as follows:

	Noble-Swiss						Noble-Cayman
	Nine months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
Accounts receivable	$	(163,051	)	$	(213,747	)	$	(163,051	)	$	(213,747	)
Other current assets		(58,303	)		(23,900	)		(59,764	)		(20,578	)
Other assets		(25,543	)		(37,171	)		(25,546	)		(39,649	)
Accounts payable		29,470			(23,744	)		29,353			(23,654	)
Other current liabilities		76,035			21,281			79,436			13,655
Other liabilities		70,382			33,566			64,215			33,540
	$	(71,010	)	$	(243,715	)	$	(75,357	)	$	(250,433	)

Note 17 — Guarantees of Registered Securities

Noble-Cayman, or one or more subsidiaries of Noble-Cayman, are a co-issuer or guarantor or otherwise obligated as of September 30, 2012 as follows:

	Issuer
Notes	(Co-Issuer(s))	Guarantor(s)
$300 million 5.875% Senior Notes due 2013	Noble-Cayman	Noble Drilling Corporation (“NDC”);
		NHIL
$250 million 7.375% Senior Notes due 2014	NHIL	Noble-Cayman
$350 million 3.45% Senior Notes due 2015	NHIL	Noble-Cayman
$300 million 3.05% Senior Notes due 2016	NHIL	Noble-Cayman
$300 million 2.50% Senior Notes due 2017	NHIL	Noble-Cayman
$202 million 7.50% Senior Notes due 2019	NDC;	Noble-Cayman;
	Noble Drilling Services 6 LLC (“NDS6”)	Noble Holding (U.S.) Corporation (“NHC”);
		Noble Drilling Holding LLC (“NDH”)
$500 million 4.90% Senior Notes due 2020	NHIL	Noble-Cayman
$400 million 4.625% Senior Notes due 2021	NHIL	Noble-Cayman
$400 million 3.95% Senior Notes due 2022	NHIL	Noble-Cayman
$400 million 6.20% Senior Notes due 2040	NHIL	Noble-Cayman
$400 million 6.05% Senior Notes due 2041	NHIL	Noble-Cayman
$500 million 5.25% Senior Notes due 2042	NHIL	Noble-Cayman

The following consolidating financial statements of Noble-Cayman, NHC and NDH combined, NDC, NHIL, NDS6 and all other subsidiaries present investments in both consolidated and unconsolidated affiliates using the equity method of accounting.

27

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING BALANCE SHEET

September 30, 2012

(in thousands)

	Noble- Cayman		NHC and NDH Combined			NDC			NHIL		NDS6		Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
ASSETS
Current assets
Cash and cash equivalents	$	—	$	435		$	—		$	19	$	—	$	213,227		$	—		$	213,681
Accounts receivable		—		10,560			1,584			—		—		779,264			—			791,408
Taxes receivable		—		25,502			—			—		—		92,852			—			118,354
Prepaid expenses		—		444			20			—		—		61,072			—			61,536
Short-term notes receivable from affiliates		—		119,476			—			—		—		252,138			(371,614	)		—
Accounts receivable from affiliates		852,466		153,146			970,918			502,287		42,675		5,570,469			(8,091,961	)		—
Other current assets		375		640			196			—		—		110,222			—			111,433
Total current assets		852,841		310,203			972,718			502,306		42,675		7,079,244			(8,463,575	)		1,296,412
Property and equipment, at cost		—		2,616,145			75,591			—		—		13,910,239			—			16,601,975
Accumulated depreciation		—		(300,637	)		(57,520	)		—		—		(3,460,572	)		—			(3,818,729	)
Property and equipment, net		—		2,315,508			18,071			—		—		10,449,667			—			12,783,246
Notes receivable from affiliates		3,816,463		1,206,000			—			3,524,814		479,107		2,171,875			(11,198,259	)		—
Investments in affiliates		7,484,253		9,078,691			3,412,070			7,188,893		2,348,479		—			(29,512,386	)		—
Other assets		6,296		535			654			26,740		790		308,837			—			343,852
Total assets	$	12,159,853	$	12,910,937		$	4,403,513		$	11,242,753	$	2,871,051	$	20,009,623		$	(49,174,220	)	$	14,423,510
LIABILITIES AND EQUITY
Current liabilities
Short-term notes payables from affiliates	$	90,314	$	51,054		$	110,770		$	—	$	—	$	119,476		$	(371,614	)	$	—
Accounts payable		—		2,720			644			—		—		294,605			—			297,969
Accrued payroll and related costs		—		5,478			7,857			—		—		120,675			—			134,010
Accounts payable to affiliates		848,091		4,628,552			4,593			152,009		68,819		2,389,897			(8,091,961	)		—
Interest payable		6,093		—			—			17,128		630		—			—			23,851
Taxes payable		—		9,007			—			—		—		117,105			—			126,112
Other current liabilities		—		—			240			—		—		144,027			—			144,267
Total current liabilities		944,498		4,696,811			124,104			169,137		69,449		3,185,785			(8,463,575	)		726,209
Long-term debt		644,975		—			—			3,792,759		201,695		—			—			4,639,429
Notes payable to affiliates		2,840,287		648,475			—			975,000		1,342,000		5,392,497			(11,198,259	)		—
Deferred income taxes		—		—			15,731			—		—		220,120			—			235,851
Other liabilities		19,929		17,475			—			—		—		316,191			—			353,595
Total liabilities		4,449,689		5,362,761			139,835			4,936,896		1,613,144		9,114,593			(19,661,834	)		5,955,084
Commitments and contingencies
Total shareholder equity		7,710,164		7,548,176			4,263,678			6,305,857		1,257,907		10,136,768			(29,512,386	)		7,710,164
Noncontrolling interest		—		—			—			—		—		758,262			—			758,262
Total equity		7,710,164		7,548,176			4,263,678			6,305,857		1,257,907		10,895,030			(29,512,386	)		8,468,426
Total liabilities and equity	$	12,159,853	$	12,910,937		$	4,403,513		$	11,242,753	$	2,871,051	$	20,009,623		$	(49,174,220	)	$	14,423,510

28

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING BALANCE SHEET

December 31, 2011

(in thousands)

	Noble- Cayman		NHC and NDH Combined			NDC			NHIL		NDS6		Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
ASSETS
Current assets
Cash and cash equivalents	$	146	$	385		$	—		$	—	$	—	$	234,525		$	—		$	235,056
Accounts receivable		—		10,810			3,371			—		—		572,982			—			587,163
Taxes receivable		—		4,566			—			—		—		70,718			—			75,284
Prepaid expenses		—		453			19			—		—		32,633			—			33,105
Short-term notes receivable from affiliates		—		119,476			—			—		—		122,298			(241,774	)		—
Accounts receivable from affiliates		1,683,740		99,202			879,581			159,132		33,905		6,372,657			(9,228,217	)		—
Other current assets		—		643			196			93		—		119,177			—			120,109
Total current assets		1,683,886		235,535			883,167			159,225		33,905		7,524,990			(9,469,991	)		1,050,717
Property and equipment, at cost		—		2,737,764			75,001			—		—		12,693,229			—			15,505,994
Accumulated depreciation		—		(232,621	)		(54,599	)		—		—		(3,117,369	)		—			(3,404,589	)
Property and equipment, net		—		2,505,143			20,402			—		—		9,575,860			—			12,101,405
Notes receivable from affiliates		3,842,062		675,000			—			2,336,527		572,107		2,678,192			(10,103,888	)		—
Investments in affiliates		6,969,201		9,101,938			3,450,212			6,605,771		2,141,450		—			(28,268,572	)		—
Other assets		3,230		473			483			18,548		880		281,669			—			305,283
Total assets	$	12,498,379	$	12,518,089		$	4,354,264		$	9,120,071	$	2,748,342	$	20,060,711		$	(47,842,451	)	$	13,457,405
LIABILITIES AND EQUITY
Current liabilities
Short-term notes payables from affiliates	$	72,298	$	50,000		$	—		$	—	$	—	$	119,476		$	(241,774	)	$	—
Accounts payable		—		5,577			985			—		—		429,167			—			435,729
Accrued payroll and related costs		—		2,897			6,518			—		—		99,493			—			108,908
Accounts payable to affiliates		2,079,719		4,166,021			27,341			112,953		34,107		2,808,076			(9,228,217	)		—
Interest payable		1,891		—			—			48,116		4,412		—			—			54,419
Taxes payable		—		10,032			—			—		—		81,158			—			91,190
Other current liabilities		—		—			240			—		—		123,159			—			123,399
Total current liabilities		2,153,908		4,234,527			35,084			161,069		38,519		3,660,529			(9,469,991	)		813,645
Long-term debt		1,274,949		—			—			2,595,320		201,695		—			—			4,071,964
Notes payable to affiliates		1,667,291		1,147,500			85,000			975,000		811,000		5,418,097			(10,103,888	)		—
Deferred income taxes		—		—			15,731			—		—		227,060			—			242,791
Other liabilities		19,929		24,878			—			—		—		210,565			—			255,372
Total liabilities		5,116,077		5,406,905			135,815			3,731,389		1,051,214		9,516,251			(19,573,879	)		5,383,772
Commitments and contingencies
Total shareholder equity		7,382,302		7,111,184			4,218,449			5,388,682		1,697,128		9,853,129			(28,268,572	)		7,382,302
Noncontrolling interest		—		—			—			—		—		691,331			—			691,331
Total equity		7,382,302		7,111,184			4,218,449			5,388,682		1,697,128		10,544,460			(28,268,572	)		8,073,633
Total liabilities and equity	$	12,498,379	$	12,518,089		$	4,354,264		$	9,120,071	$	2,748,342	$	20,060,711		$	(47,842,451	)	$	13,457,405

29

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Three Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	36,149		$	5,061		$	—		$	—		$	809,858		$	(17,856	)	$	833,212
Reimbursables		—			389			—			—			—			27,748			—			28,137
Labor contract drilling services		—			—			—			—			—			22,667			—			22,667
Other		—			—			—			—			—			16			—			16
Total operating revenues		—			36,538			5,061			—			—			860,289			(17,856	)		884,032
Operating costs and expenses
Contract drilling services		1,355			13,948			1,919			19,636			—			425,223			(17,856	)		444,225
Reimbursables		—			216			—			—			—			20,831			—			21,047
Labor contract drilling services		—			—			—			—			—			12,991			—			12,991
Depreciation and amortization		—			15,500			1,181			—			—			177,914			—			194,595
Selling, general and administrative		426			1,447			—			9,700			1			3,913			—			15,487
Total operating costs and expenses		1,781			31,111			3,100			29,336			1			640,872			(17,856	)		688,345
Operating income (loss)		(1,781	)		5,427			1,961			(29,336	)		(1	)		219,417			—			195,687
Other income (expense)
Equity earnings in affiliates, net of tax		162,311			69,069			36,463			172,364			129,161			—			(569,368	)		—
Interest expense, net of amounts capitalized		(30,496	)		(8,964	)		(852	)		(33,509	)		(11,832	)		(20,221	)		80,239			(25,635	)
Interest income and other, net		1,689			11,080			9			37,430			2,846			28,546			(80,239	)		1,361
Income before income taxes		131,723			76,612			37,581			146,949			120,174			227,742			(569,368	)		171,413
Income tax provision		—			(8,639	)		—			—			—			(16,145	)		—			(24,784	)
Net Income		131,723			67,973			37,581			146,949			120,174			211,597			(569,368	)		146,629
Net income attributable to noncontrolling interests		—			—			—			—			—			(14,906	)		—			(14,906	)
Net income attributable to Noble Corporation		131,723			67,973			37,581			146,949			120,174			196,691			(569,368	)		131,723
Other comprehensive income, net		3,384			—			—			—			—			3,384			(3,384	)		3,384
Comprehensive income attributable to Noble Corporation	$	135,107		$	67,973		$	37,581		$	146,949		$	120,174		$	200,075		$	(572,752	)	$	135,107

30

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Nine Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	117,488		$	14,941		$	—		$	—		$	2,352,618		$	(57,288	)	$	2,427,759
Reimbursables		—			6,199			—			—			—			87,891			—			94,090
Labor contract drilling services		—			—			—			—			—			58,538			—			58,538
Other		—			—			—			—			—			1,190			(932	)		258
Total operating revenues		—			123,687			14,941			—			—			2,500,237			(58,220	)		2,580,645
Operating costs and expenses
Contract drilling services		3,794			42,642			5,529			56,048			—			1,231,176			(58,220	)		1,280,969
Reimbursables		—			5,641			—			—			—			70,977			—			76,618
Labor contract drilling services		—			—			—			—			—			34,070			—			34,070
Depreciation and amortization		—			45,577			3,278			—			—			499,416			—			548,271
Selling, general and administrative		1,237			4,258			—			28,137			1			11,331			—			44,964
Loss on impairment		—			—			—			—			—			18,345			—			18,345
Gain on contract settlements/extinguishments, net		—			(4,869	)		—			—			—			(28,386	)		—			(33,255	)
Total operating costs and expenses		5,031			93,249			8,807			84,185			1			1,836,929			(58,220	)		1,969,982
Operating income (loss)		(5,031	)		30,438			6,134			(84,185	)		(1	)		663,308			—			610,663
Other income (expense)
Equity earnings in affiliates, net of tax		515,132			358,234			92,343			583,122			274,564			—			(1,823,395	)		—
Interest expense, net of amounts capitalized		(76,396	)		(37,881	)		(3,040	)		(83,975	)		(31,020	)		(60,193	)		235,722			(56,783	)
Interest income and other, net		5,640			29,771			4			99,609			8,771			96,295			(235,722	)		4,368
Income before income taxes		439,345			380,562			95,441			514,571			252,314			699,410			(1,823,395	)		558,248
Income tax provision		—			(30,902	)		—			—			—			(61,070	)		—			(91,972	)
Net Income		439,345			349,660			95,441			514,571			252,314			638,340			(1,823,395	)		466,276
Net income attributable to noncontrolling interests		—			—			—			—			—			(26,931	)		—			(26,931	)
Net income attributable to Noble Corporation		439,345			349,660			95,441			514,571			252,314			611,409			(1,823,395	)		439,345
Other comprehensive income, net		2,244			—			—			—			—			2,244			(2,244	)		2,244
Comprehensive income attributable to Noble Corporation	$	441,589		$	349,660		$	95,441		$	514,571		$	252,314		$	613,653		$	(1,825,639	)	$	441,589

31

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Three Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	38,955		$	5,105		$	—		$	—		$	680,617		$	(19,785	)	$	704,892
Reimbursables		—			691			—			—			—			16,747			—			17,438
Labor contract drilling services		—			4			—			—			—			15,560			—			15,564
Other		—			—			—			—			—			8			—			8
Total operating revenues		—			39,650			5,105			—			—			712,932			(19,785	)		737,902
Operating costs and expenses
Contract drilling services		1,759			10,485			1,883			9,819			—			345,465			(19,785	)		349,626
Reimbursables		—			420			—			—			—			13,551			—			13,971
Labor contract drilling services		—			—			—			—			—			8,053			—			8,053
Depreciation and amortization		—			13,138			937			—			—			151,644			—			165,719
Selling, general and administrative		2,094			1,488			—			9,253			—			4,802			—			17,637
Total operating costs and expenses		3,853			25,531			2,820			19,072			—			523,515			(19,785	)		555,006
Operating income (loss)		(3,853	)		14,119			2,285			(19,072	)		—			189,417			—			182,896
Other income (expense)
Equity earnings in affiliates, net of tax		174,673			226,079			45,818			172,153			(20,624	)		—			(598,099	)		—
Interest expense, net of amounts capitalized		(16,721	)		(15,612	)		(1,285	)		(21,641	)		(7,106	)		(267	)		51,102			(11,530	)
Interest income and other, net		1,615			6,906			(40	)		15,813			2,277			26,415			(51,102	)		1,884
Income before income taxes		155,714			231,492			46,778			147,253			(25,453	)		215,565			(598,099	)		173,250
Income tax (provision) / benefit		—			487			—			—			—			(17,785	)		—			(17,298	)
Net Income		155,714			231,979			46,778			147,253			(25,453	)		197,780			(598,099	)		155,952
Net income attributable to noncontrolling interests		—			—			—			—			—			(238	)		—			(238	)
Net income attributable to Noble Corporation		155,714			231,979			46,778			147,253			(25,453	)		197,542			(598,099	)		155,714
Other comprehensive loss, net		(13,896	)		—			—			—			—			(13,896	)		13,896			(13,896	)
Comprehensive income attributable to Noble Corporation	$	141,818		$	231,979		$	46,778		$	147,253		$	(25,453	)	$	183,646		$	(584,203	)	$	141,818

32

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Nine Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	100,009		$	14,800		$	—		$	—		$	1,770,356		$	(48,118	)	$	1,837,047
Reimbursables		—			3,381			12			—			—			60,458			—			63,851
Labor contract drilling services		—			4			—			—			—			43,119			—			43,123
Other		—			—			—			—			—			766			—			766
Total operating revenues		—			103,394			14,812			—			—			1,874,699			(48,118	)		1,944,787
Operating costs and expenses
Contract drilling services		4,818			31,554			5,681			26,625			—			960,102			(48,118	)		980,662
Reimbursables		—			3,331			—			—			—			46,466			—			49,797
Labor contract drilling services		—			—			—			—			—			25,326			—			25,326
Depreciation and amortization		—			36,330			2,781			—			—			446,899			—			486,010
Selling, general and administrative		5,397			4,206			—			24,756			1			14,450			—			48,810
Gain on contract extinguishments, net		—			—			—			—			—			(21,202	)		—			(21,202	)
Total operating costs and expenses		10,215			75,421			8,462			51,381			1			1,472,041			(48,118	)		1,569,403
Operating income (loss)		(10,215	)		27,973			6,350			(51,381	)		(1	)		402,658			—			375,384
Other income (expense)
Equity earnings in affiliates, net of tax		350,439			328,452			80,795			344,524			86,932			—			(1,191,142	)		—
Interest expense, net of amounts capitalized		(52,985	)		(45,527	)		(4,824	)		(67,667	)		(22,048	)		(3,284	)		150,935			(45,400	)
Interest income and other, net		4,953			19,376			8			38,557			6,321			85,698			(150,935	)		3,978
Income before income taxes		292,192			330,274			82,329			264,033			71,204			485,072			(1,191,142	)		333,962
Income tax (provision) / benefit		—			6,287			—			—			—			(47,767	)		—			(41,480	)
Net Income		292,192			336,561			82,329			264,033			71,204			437,305			(1,191,142	)		292,482
Net income attributable to noncontrolling interests		—			—			—			—			—			(290	)		—			(290	)
Net income attributable to Noble Corporation		292,192			336,561			82,329			264,033			71,204			437,015			(1,191,142	)		292,192
Other comprehensive loss, net		(5,992	)		—			—			—			—			(5,992	)		5,992			(5,992	)
Comprehensive income attributable to Noble Corporation	$	286,200		$	336,561		$	82,329		$	264,033		$	71,204		$	431,023		$	(1,185,150	)	$	286,200

33

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

Nine Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Cash flows from operating activities
Net cash from operating activities	$	(59,614	)	$	7,563		$	8,989		$	(107,638	)	$	(25,942	)	$	1,133,499		$	—		$	956,857
Cash flows from investing activities
New construction and capital expenditures		—			(499,141	)		(1,040	)		—			—			(940,534	)		—			(1,440,715	)
Notes receivable from affiliates		—			—			—			(1,188,287	)		—			—			1,188,287			—
Net cash from investing activities		—			(499,141	)		(1,040	)		(1,188,287	)		—			(940,534	)		1,188,287			(1,440,715	)
Cash flows from financing activities
Change in bank credit facilities, net		(630,000	)		—			—			—			—			—			—			(630,000	)
Proceeds from issuance of senior notes, net		—			—			—			1,186,636			—			—			—			1,186,636
Contributions from joint venture partners		—			—			—			—			—			40,000			—			40,000
Financing costs on credit facilities		(5,014	)		—			—			—			—			—			—			(5,014	)
Distributions to parent		(129,139	)		—			—			—			—			—			—			(129,139	)
Advances (to) from affiliates		(364,666	)		491,628			(7,949	)		109,308			25,942			(254,263	)		—			—
Notes payable to affiliates		1,188,287			—			—			—			—			—			(1,188,287	)		—
Net cash from financing activities		59,468			491,628			(7,949	)		1,295,944			25,942			(214,263	)		(1,188,287	)		462,483
Net change in cash and cash equivalents		(146	)		50			—			19			—			(21,298	)		—			(21,375	)
Cash and cash equivalents, beginning of period		146			385			—			—			—			234,525			—			235,056
Cash and cash equivalents, end of period	$	—		$	435		$	—		$	19		$	—		$	213,227		$	—		$	213,681

34

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

Nine Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Cash flows from operating activities
Net cash from operating activities	$	(40,060	)	$	30,944		$	6,889		$	(105,014	)	$	(19,420	)	$	614,119		$	—		$	487,458
Cash flows from investing activities
New construction and capital expenditures		—			(1,135,054	)		(475	)		—			—			(880,871	)		—			(2,016,400	)
Notes receivable from affiliates		20,000			—			—			(1,096,927	)		—			200,000			876,927			—
Refund from contract extinguishments		—			—			—			—			—			18,642			—			18,642
Net cash from investing activities		20,000			(1,135,054	)		(475	)		(1,096,927	)		—			(662,229	)		876,927			(1,997,758	)
Cash flows from financing activities
Change in bank credit facilities, net		675,000			—			—			—			—			—			—			675,000
Proceeds from issuance of senior notes, net		—			—			—			1,087,833			—			—			—			1,087,833
Contributions from joint venture partners		—			—			—			—			—			481,000			—			481,000
Payments of joint venture debt		—			—			—			—			—			(693,494	)		—			(693,494	)
Settlement of interest rate swaps		—			—			—			—			—			(29,032	)		—			(29,032	)
Financing costs on credit facilities		(2,835	)		—			—			—			—			—			—			(2,835	)
Distributions to parent		(149,566	)		—			—			—			—			—			—			(149,566	)
Advances (to) from affiliates		(355,081	)		1,121,756			28,586			114,108			19,420			(928,789	)		—			—
Notes payable to affiliates		(147,500	)		(17,500	)		(35,000	)		—			—			1,076,927			(876,927	)		—
Net cash from financing activities		20,018			1,104,256			(6,414	)		1,201,941			19,420			(93,388	)		(876,927	)		1,368,906
Net change in cash and cash equivalents		(42	)		146			—			—			—			(141,498	)		—			(141,394	)
Cash and cash equivalents, beginning of period		42			146			—			—			—			333,211			—			333,399
Cash and cash equivalents, end of period	$	—		$	292		$	—		$	—		$	—		$	191,713		$	—		$	192,005

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion is intended to assist you in understanding our financial position at September 30, 2012, and our results of operations for the three and nine months ended September 30, 2012 and 2011. The following discussion should be read in conjunction with the consolidated financial statements and related notes contained in this Quarterly Report on Form 10-Q and the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2011 filed by Noble Corporation, a Swiss corporation (“Noble-Swiss”), and Noble Corporation, a Cayman Islands company (“Noble-Cayman”).

Forward-Looking Statements

This Quarterly Report on Form 10-Q includes “forward-looking statements” within the meaning of Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as amended. All statements other than statements of historical facts included in this report regarding contract backlog, fleet status, our financial position, business strategy, timing or results of acquisitions or dispositions, repayment of debt, borrowings under our Credit Facilities (as defined below), issuance of commercial paper notes, completion and acceptance of our newbuild rigs, future capital expenditures, contract commitments, dayrates, contract commencements, extension or renewals, contract tenders, the outcome of any dispute, litigation or investigation, plans and objectives of management for future operations, foreign currency requirements, results of joint ventures, indemnity and other contract claims, construction and upgrade of rigs, industry conditions including the effect of disruptions of drilling in the U.S. Gulf of Mexico, access to financing, impact of competition, governmental regulations and permitting, availability of labor, worldwide economic conditions, taxes and tax rates, indebtedness covenant compliance, and timing for compliance with any new regulations are forward-looking statements. When used in this report, the words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “project,” “should” and similar expressions are intended to be among the statements that identify forward-looking statements. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we cannot assure you that such expectations will prove to be correct. These forward-looking statements speak only as of the date of this report on Form 10-Q and we undertake no obligation to revise or update any forward-looking statement for any reason, except as required by law. We have identified factors including but not limited to operating hazards and delays, risks associated with operations outside the U.S., actions by regulatory authorities, customers, joint venture partners, contractors, lenders and other third parties, legislation and regulations affecting drilling operations, costs and difficulties relating to the integration of businesses, factors affecting the level of activity in the oil and gas industry, supply and demand of drilling rigs, factors affecting the duration of contracts, the actual amount of downtime, factors that reduce applicable dayrates, violations of anti-corruption laws, hurricanes and other weather conditions and the future price of oil and gas that could cause actual plans or results to differ materially from those included in any forward-looking statements. These factors include those referenced or described in Part I, Item 1A. “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2011, our Quarterly Reports on Form 10-Q and in our other filings with the U.S. Securities and Exchange Commission (“SEC”). We cannot control such risk factors and other uncertainties, and in many cases, we cannot predict the risks and uncertainties that could cause our actual results to differ materially from those indicated by the forward-looking statements. You should consider these risks and uncertainties when you are evaluating us.

Executive Overview

Noble-Swiss is a leading provider of offshore contract drilling services for the oil and gas industry. Our fleet of 79 mobile offshore drilling units consists of 14 semisubmersibles, 14 drillships, 49 jackups and two submersibles. Additionally, we have one floating production storage and offloading unit. Our fleet includes 11 units under construction as follows:

• five dynamically positioned, ultra-deepwater, harsh environment drillships and

• six high-specification heavy-duty, harsh environment jackup rigs.

Our global fleet is currently located in the following areas: the U.S. Gulf of Mexico and Alaska, Mexico, Brazil, the North Sea, the Mediterranean, West Africa, the Middle East, India, Australia and the Asian Pacific. Noble and its predecessors have been engaged in the contract drilling of oil and gas wells since 1921.

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Outlook

During the first nine months of 2012, we continued to see stability in the offshore drilling market even as the underlying commodity markets were subject to short-term volatility. In the U.S. Gulf of Mexico, the granting of permits and publication of new safety rules has led to more stable activity levels within the industry, especially as it relates to the deepwater markets. The continued stability reflects the positive long-term outlook for commodity prices, which has led to greater investment and contributed to improved dayrates for deepwater and ultra-deepwater rigs worldwide. While there are still risks, including potential third-party environmental lawsuits targeting the permitting process, possible new drilling regulations, a failure of the federal agencies of the U.S. government to issue permits in a timely manner and the adoption by individual operators of new drilling or equipment standards exceeding those required by regulatory bodies, we believe the potential for these risks will be reduced as long as rigs continue to work without incident in the U.S. Gulf of Mexico.

There continues to be uncertainty regarding the sustainability of the global economic recovery, which is proceeding unevenly in different geographic regions. In addition to political instability in certain oil producing nations in the Middle East and North Africa, there is also uncertainty regarding recovery in the credit markets, particularly in Europe, which some analysts predict could be the catalyst for a worldwide recession. As a result, oil prices during 2012 have been volatile for short-term pricing. Supply side concerns in response to continued political unrest in the Middle East and North Africa are weighed against global recession fears. Natural gas prices in the United States continue to be at low levels based on current oversupply. We believe these competing factors will impact the volatility in the offshore drilling market and the prices of oil and gas commodities for the foreseeable future.

Despite the instability in the global economy and commodity prices noted above, the market for offshore drilling services has continued the upward trend that began in 2011. We believe both the short-term and long-term outlook for the deep and ultra-deepwater markets continues to strengthen. Market dayrates for new ultra-deepwater units remain above $500,000, which is higher than rates seen in recent years. A number of fixtures have exceeded $550,000, and in certain cases even exceeded $600,000. Our market analysis indicates that there is little, if any, availability of ultra-deepwater units for 2012, and 2013 availability is rapidly decreasing. Utilization rates for jackup units stabilized in 2011, and improved in most regions during the first nine months of 2012. While we currently have three jackup rigs available, we have seen tangible market activity and anticipate a favorable environment for these rigs in the short-term. We continue to see differentiation in the jackup market, with newer units having utilization rates and dayrates exceeding those for units that entered service before 2000. However, we continue to see improvement in the older jack-up market with increased utilization and competitive dayrates.

Demand for our drilling services generally depends on a variety of economic and political factors, including worldwide demand for oil and gas, the ability of the Organization of Petroleum Exporting Countries (“OPEC”) to set and maintain production levels and pricing, the level of production of non-OPEC countries and the policies of various governments regarding access to their oil and gas reserves. Our results of operations depend on offshore drilling activity worldwide. Historically, oil and gas prices and market expectations of potential changes in these prices have significantly affected that level of activity. Generally, higher oil and natural gas prices, or our customers’ expectations of higher prices, result in greater demand for our services and lower oil and gas prices result in reduced demand for our services. Demand for our services is also a function of the worldwide supply of mobile offshore drilling units. Industry analysts widely report that a significant expansion of industry supply of both jackups and ultra-deepwater units is underway. This increased supply and the introduction of additional non-contracted rigs into the marketplace could have an adverse effect on demand for our services or the dayrates we are able to achieve.

We currently have 12 rigs contracted in Mexico with Pemex Exploracion y Produccion (“Pemex”), and three of these rigs have contracts scheduled to expire in the fourth quarter of 2012. Pemex continues to tender for additional jackup rigs as it attempts to increase the number of working rigs. Some previous tenders published by Pemex contained a requirement that certain units must have entered service since the year 2000. While Pemex did not succeed in securing a significant number of newer rigs from those published tenders, we cannot predict whether this age requirement will be present in future Pemex tenders. If this requirement is present in future tenders, it could require us to seek work for our rigs in other locations, as the ages of our rigs currently operating in Mexico do not meet this requirement. If such work is not available, it could lead to additional idle time on some of our rigs. We cannot predict how many rigs might be affected or how long they could remain idle. Given the current market conditions and availability of rigs, we believe our rigs will either receive contract extensions with PEMEX or will find additional work in the future.

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In connection with our existing drilling contracts with Petrobras for two of our drillships operating in Brazil, we approved certain shipyard reliability upgrade projects for these drillships, the Noble Leo Segerius and the Noble Roger Eason. These upgrade projects are designed to enhance the reliability and operational performance of these drillships. During the first quarter of 2012, the Noble Leo Segerius completed the shipyard portion of its reliability upgrade and departed the shipyard in Brazil for seatrials, final commissioning and customer acceptance activities. The Noble Leo Segerius returned to work in the fourth quarter of 2012. The Noble Roger Eason entered the shipyard for its reliability upgrade in the second quarter of 2012, which is expected to take approximately 270 days to complete. There are a number of risks associated with shipyard projects of this nature, particularly in Brazil, including potential project delays and cost overruns because of labor, customs, local shipyard, local content and other issues. For example, recently a number of labor issues within the operational and regulatory support infrastructure in Brazil caused two rigs to be delayed in returning to operations following the completion of shipyard projects. In addition, the drilling contracts for these vessels provide Petrobras with certain rights of termination in the event of excessive downtime, and it is possible that Petrobras could exercise this right in the future with respect to one or both of these drillships. We intend to continue to closely monitor and discuss with Petrobras the status of these projects and plan to take appropriate steps to mitigate identified risks, which depending upon the circumstances, could involve a variety of options.

Results and Strategy

Our business strategy focuses on the active expansion of our fleet through construction and acquisitions of drilling units, coupled with upgrades and modifications of existing units. We seek to deploy our drilling assets in important oil and gas producing areas. We have actively expanded our offshore drilling and deepwater capabilities in recent years through the construction of new rigs, and as part of this technical and operational expansion, we plan to continue pursuing opportunities to upgrade our fleet to achieve greater technological capability, which we believe will lead to increased drilling efficiencies and the ability to complete increasingly more complex well programs.

We believe modernizing our overall fleet is an important element of our strategy. We may dispose of some, or all, of our lower specification units and related assets and operations in one or more transactions. These dispositions may include sales of assets to third parties, a spin-off or other distribution or separation of assets. In analyzing any disposition, we will consider the strategic benefit of the potential transaction while seeking to secure what we consider appropriate value to our shareholders. To date, no potential disposition has provided the results we seek. The drilling market for lower specification units has recently improved. While we expect the increased utilization and dayrates experienced in most regions for these assets to contribute positively to our overall results under current market conditions, we do continue to analyze strategic options for these lower specification units in a manner that we believe will maximize shareholder value. We can provide no assurance as to whether, or when, any disposition transaction will occur or what form it may take.

At September 30, 2012, we continued our newbuild strategy with the following 11 projects:

• one dynamically positioned, ultra-deepwater, harsh environment Globetrotter-class drillship, which is scheduled to be delivered to our customer in the fourth quarter of 2013;

• four dynamically positioned, ultra-deepwater, harsh environment drillships at Hyundai Heavy Industries Co. Ltd. (“HHI”), the first of which is estimated to be delivered from the shipyard to begin acceptance testing in the second quarter of 2013; and

• six high-specification heavy duty, harsh environment jackup rigs, the first of which is estimated to be delivered from the shipyard to begin acceptance testing in the first quarter of 2013.

Of our 11 rigs under construction as of September 30, 2012, two of the drillships are committed for five years or more and one drillship is committed for three years. Additionally, two of the jackup rigs have received commitments for contracts. The remaining rigs are currently being constructed without contracts.

While we cannot predict the future level of demand or dayrates for our drilling services or future conditions in the offshore contract drilling industry, we continue to believe we are well positioned within the industry and our newbuild program will further strengthen our position, especially in the ultra-deepwater and high-specification markets.

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In the third quarter of 2012, we recognized net income attributable to Noble-Swiss of $115 million, or $0.45 per diluted share, on total revenues of $884 million. Sequential results of key metrics are as follows:

	Three Months Ended
	September 30,			June 30,
	2012			2012
Average dayrate	$	168,608		$	181,663
Average utilization		78	%		76	%
Daily contract drilling services costs	$	90,885		$	90,699
Contract drilling services margin		46	%		50	%

Contract Drilling Services Backlog

We maintain a backlog (as defined below) of commitments for contract drilling services. The following table sets forth, as of September 30, 2012, the amount of our contract drilling services backlog and the percent of available operating days committed for the periods indicated:

			Year Ending December 31,
	Total		2012 (1)			2013			2014			2015			2016-2023
	(In millions)
Contract Drilling Services Backlog
Semisubmersibles/Drillships (2) (4) (6)	$	12,495	$	651		$	2,607		$	2,614		$	1,878		$	4,745
Jackups/Submersibles (3)		2,302		344			1,229			631			98			—
Total (4)	$	14,797	$	995		$	3,836		$	3,245		$	1,976		$	4,745
Percent of Available Operating Days
Committed (5)				83	%		69	%		45	%		19	%		5	%

(1) Represents a three-month period beginning October 1, 2012.

(2) Our drilling contracts with Petrobras provide an opportunity for us to earn performance bonuses based on downtime experienced for our rigs operating offshore Brazil. With respect to our semisubmersibles operating offshore Brazil for Petrobras, we have included in our backlog an amount equal to 75 percent of potential performance bonuses for such semisubmersibles, which amount is based on and generally consistent with our historical earnings of performance bonuses for these rigs. With respect to our drillships presently operating offshore Brazil for Petrobras, we (a) have not included in our backlog any performance bonuses for periods prior to the commencement of certain upgrade projects planned for 2012 and 2013, which projects are designed to enhance the reliability and operational performance of these drillships, and (b) have included in our backlog an amount equal to 75 percent of potential performance bonuses for periods after the estimated completion of such upgrade projects. Our backlog for semisubmersibles/drillships includes approximately $219 million attributable to these performance bonuses.

The drilling contracts with Shell for the Noble Globetrotter I, Noble Globetrotter II, Noble Jim Thompson, Noble Clyde Boudreaux and Noble Max Smith, as well as the letters of intent for the Noble Jim Day and Noble Don Taylor, provide opportunities for us to earn performance bonuses based on key performance indicators as defined by Shell. With respect to these contracts, we have included in our backlog an amount equal to 50 percent of the potential performance bonuses for these rigs. Our backlog for these rigs includes approximately $414 million attributable to these performance bonuses.

(3) Pemex has the ability to cancel its drilling contracts on 30 days or less notice without requiring an early termination payment by Pemex. As of September 30, 2012, we had 12 rigs contracted to Pemex in Mexico, and our backlog includes approximately $693 million related to such contracts at September 30, 2012.

(4) Our drilling contracts generally provide the customer an early termination right in the event we fail to meet certain performance standards, including downtime thresholds. For example, Petrobras has the right to terminate its contracts in the event of excessive downtime. While we have exceeded downtime thresholds in the past on certain rigs contracted with Petrobras, we have not received any notification concerning contract cancellations to date nor do we anticipate receiving any such notifications.

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(5) Percentages take into account additional capacity from the estimated dates of deployment of our newbuild rigs that are scheduled to commence operations during 2012 through 2015.

(6) Noble and a subsidiary of Shell are involved in joint venture agreements to own and operate both the Noble Bully I and the Noble Bully II. Pursuant to these agreements, each party has an equal 50 percent share in both vessels. As of September 30, 2012, the combined amount of backlog for these rigs totaled $2.4 billion, all of which is included in our backlog. Noble’s proportionate interest in the backlog for these rigs was $1.2 billion.

Our contract drilling services backlog reported above reflects estimated future revenues attributable to both signed drilling contracts and letters of intent that we expect will become binding contracts. A letter of intent is generally subject to customary conditions, including the execution of a definitive drilling contract. For a number of reasons, it is possible that some customers that have entered into letters of intent will not enter into signed drilling contracts. We calculate backlog for any given unit and period by multiplying the full contractual operating dayrate for such unit by the number of days remaining in the period. The reported contract drilling services backlog does not include amounts representing revenues for mobilization, demobilization and contract preparation, which are not expected to be significant to our contract drilling services revenues, amounts constituting reimbursables from customers or amounts attributable to uncommitted option periods under drilling contracts or letters of intent.

The amount of actual revenues earned and the actual periods during which revenues are earned may be different than the backlog amounts and backlog periods set forth in the table above for various factors, including, but not limited to, shipyard and maintenance projects, operational downtime, weather conditions, bonuses and other factors that result in applicable dayrates lower than the full contractual operating dayrate. In addition, amounts included in the backlog may change as a result of government-imposed restrictions or delays in the issuance of drilling permits. Furthermore, drilling contracts may be varied or modified by mutual consent or customers may exercise early termination rights contained in some of our drilling contracts or decline to enter into a drilling contract after executing a letter of intent. As a result, our backlog as of any particular date may not be indicative of our actual operating results for the subsequent periods for which the backlog is calculated.

As of September 30, 2012, we estimate Shell and Petrobras represented approximately 61% and 15%, respectively, of our backlog.

Nigerian Operations

As previously disclosed, in November 2010 we finalized settlements with the SEC and the Department of Justice as the result of an internal investigation of the legality under the United States Foreign Corrupt Practices Act (“FCPA”) and local laws of certain reimbursement payments made by our Nigerian affiliate to our customs agents in Nigeria. In January 2011, a subsidiary of Noble-Swiss resolved an investigation by the Nigerian Economic and Financial Crimes Commission and the Nigerian Attorney General Office into these same activities. Any additional investigation by these or other agencies could damage our reputation and result in substantial fines, sanctions, civil and/or criminal penalties and curtailment of operations in certain jurisdictions and might adversely affect our business, results of operations or financial condition. Further, resolving any additional investigations could be expensive and consume significant time and attention of our senior management.

In April 2010, the Nigerian Oil and Gas Industry Content Development Bill was signed into law. The law is designed to create Nigerian content in operations and transactions within the Nigerian oil and gas industry. The law sets forth certain requirements for the utilization of Nigerian human resources and goods and services in oil and gas projects and creates a Nigerian Content Development and Monitoring Board (“NCDMB”) to implement and monitor the law and develop regulations pursuant to the law. The NCDMB has indicated that it will require all non-Nigerian offshore drilling companies to reorganize their local operations to include Nigerian indigenous minority interests in the operating assets and to obtain the approval of the NCDMB for future work in Nigeria. The NCDMB actively monitors awards for future work and reviews plans for local content and development of Nigerian interests. The law also established a Nigerian Content Development Fund to fund the implementation of the law, and requires that 1 percent of the value of every contract awarded in the Nigerian oil and gas industry be paid into the fund. We cannot predict what impact the law may have on our existing or future operations in Nigeria, but the effect on our operations there could be significant.

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Results of Operations

For the Three Months Ended September 30, 2012 and 2011

Net income attributable to Noble Corporation (“Noble-Swiss”) for the three months ended September 30, 2012 (the “Current Quarter”) was $115 million, or $0.45 per diluted share, on operating revenues of $884 million, compared to net income for the three months ended September 30, 2011 (the “Comparable Quarter”) of $135 million, or $0.53 per diluted share, on operating revenues of $738 million.

The consolidated financial statements of Noble-Swiss include the accounts of Noble-Cayman; Noble-Swiss conducts substantially all of its business through Noble-Cayman and its subsidiaries. As a result, the financial position and results of operations for Noble-Cayman, and the reasons for material changes in the amount of revenue and expense items between 2012 and 2011, would be the same as the information presented below regarding Noble-Swiss in all material respects, except operating income for Noble-Cayman for the three months ended September 30, 2012 was $17 million higher than operating income for Noble-Swiss for the same period. The operating income difference is primarily a result of executive costs directly attributable to Noble-Swiss for operations support and stewardship related services.

Rig Utilization, Operating Days and Average Dayrates

Operating revenues and operating costs and expenses for our contract drilling services segment are dependent on three primary metrics — rig utilization, operating days and dayrates. The following table sets forth the average rig utilization, operating days and average dayrates for our rig fleet for the three months ended September 30, 2012 and 2011:

	Average Rig Utilization (1)						Operating Days (2)							Average Dayrates
	Three Months Ended September 30,						Three Months Ended September 30,							Three Months Ended September 30,
	2012			2011			2012		2011		% Change			2012		2011		% Change
Jackups		83	%		82	%		3,285		3,229		2	%	$	97,857	$	89,352		10	%
Semisubmersibles		83	%		84	%		1,067		1,086		-2	%		331,900		315,034		5	%
Drillships		73	%		60	%		590		329		79	%		267,166		225,669		18	%
Other		0	%		0	%		—		—		—			—		—		—
Total		78	%		76	%		4,942		4,644		6	%	$	168,608	$	151,782		11	%

(1) Information reflects our policy of reporting on the basis of the number of rigs in our fleet, excluding newbuild rigs under construction.

(2) Information reflects the number of days that our rigs were operating under contract.

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Contract Drilling Services

The following table sets forth the operating revenues and the operating costs and expenses for our contract drilling services segment for the three months ended September 30, 2012 and 2011 (in thousands):

	Three Months Ended September 30,				Change
	2012		2011		$			%
Operating revenues:
Contract drilling services	$	833,212	$	704,892	$	128,320			18	%
Reimbursables (1)		27,087		14,646		12,441			85	%
Other		16		8		8			100	%
	$	860,315	$	719,546	$	140,769			20	%
Operating costs and expenses:
Contract drilling services	$	449,125	$	358,547	$	90,578			25	%
Reimbursables (1)		20,039		11,362		8,677			76	%
Depreciation and amortization		191,638		162,837		28,801			18	%
Selling, general and administrative		26,228		27,212		(984	)		-4	%
		687,030		559,958		127,072			23	%
Operating income	$	173,285	$	159,588	$	13,697			9	%

(1) We record reimbursements from customers for out-of-pocket expenses as operating revenues and the related direct costs as operating expenses. Changes in the amount of these reimbursables generally do not have a material effect on our financial position, results of operations or cash flows.

Operating Revenues—Changes in contract drilling services revenues for the Current Quarter as compared to the Comparable Quarter were driven by increases in both average dayrates and operating days. The 11 percent increase in average dayrates increased revenue by $83 million while the 6 percent increase in operating days increased revenues by approximately $45 million.

The change in contract drilling services revenues relates to our drillships, jackups and semisubmersibles, which generated approximately $83 million, $33 million and $12 million more revenue, respectively, in the Current Quarter.

The increase in drillship revenues was driven by a 79 percent increase in operating days and an 18 percent increase in average dayrates, resulting in a $59 million and a $24 million increase in revenues, respectively, from the Comparable Quarter. The increase in both operating days and average dayrates was the result of the Noble Bully I, Noble Bully II and Noble Globetrotter I, which commenced their contracts with Shell in March 2012, April 2012, and July 2012, respectively.

The 10 percent increase in jackup average dayrates resulted in a $28 million increase in revenues, which was coupled with a 2 percent increase in jackup operating days, resulting in a $5 million increase in revenues from the Comparable Quarter. The increase in average dayrates resulted from improved market conditions in the global shallow water market throughout the jackup fleet. The slight increase in utilization primarily related to rigs in Mexico, the North Sea and the Middle East, which experienced increased operating days during the Current Quarter.

The 5 percent increase in semisubmersible average dayrates resulted in an $18 million increase in revenues from the Comparable Quarter, which was partially offset by the 2 percent decrease in operating days, which resulted in a $6 million decrease in revenues. The increase in average dayrates is a result of the Noble Paul Romano returning to work at a higher than average dayrate after being stacked in the Comparable Quarter, as well as favorable dayrate changes on new contracts across the semisubmersible fleet. The slight decrease in operating days is primarily from the Noble Dave Beard, the Noble Max Smith and the Noble Clyde Boudreaux, which all experienced mobilization time and/or shipyard time to undergo contract preparations and/or repairs and regulatory inspections during the Current Quarter after operating at full capacity during the Comparable Quarter.

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Operating Costs and Expenses—Contract drilling services operating costs and expenses increased $91 million for the Current Quarter as compared to the Comparable Quarter. A portion of the increase is due to the crew-up and operating expenses for the recently completed rigs noted above, which added approximately $40 million in expense during the Current Quarter. Excluding the additional expenses related to these rigs, our contract drilling costs increased $51 million in the Current Quarter from the Comparable Quarter. This change was primarily driven by a $20 million increase in repair and maintenance, a $12 million increase in labor, a $9 million increase related to shorebase support, a $5 million increase in insurance costs related to increased premiums on our new policy renewed in March 2012, a $3 million increase in safety, training and regulatory inspections and a $2 million increase in rig catering and other miscellaneous expenses.

The increase in depreciation and amortization in the Current Quarter from the Comparable Quarter was primarily attributable to assets placed in service, including the Noble Bully I, Noble Bully II and Noble Globetrotter I.

Other

The following table sets forth the operating revenues and the operating costs and expenses for our other services for the three months ended September 30, 2012 and 2011:

	Three Months Ended September 30,				Change
	2012		2011		$			%
Operating revenues:
Labor contract drilling services	$	22,667	$	15,564	$	7,103			46	%
Reimbursables (1)		1,050		2,792		(1,742	)		-62	%
	$	23,717	$	18,356	$	5,361			29	%
Operating costs and expenses:
Labor contract drilling services	$	12,991	$	8,053	$	4,938			61	%
Reimbursables (1)		1,008		2,609		(1,601	)		-61	%
Depreciation and amortization		3,449		3,376		73			2	%
Selling, general and administrative		630		324		306			94	%
		18,078		14,362		3,716			26	%
Operating income	$	5,639	$	3,994	$	1,645			41	%

(1) We record reimbursements from customers for out-of-pocket expenses as operating revenues and the related direct costs as operating expenses. Changes in the amount of these reimbursables generally do not have a material effect on our financial position, results of operations or cash flows.

Operating Revenues and Costs and Expenses—The change in both revenue and expense primarily relate to the commencement of a refurbishment project with our customer, Shell, for one of its rigs to be operated under a labor contract in Alaska.

Other Income and Expenses

Interest Expense, net of amount capitalized—Interest expense, net of amount capitalized, increased $14 million in the Current Quarter as compared to the Comparable Quarter. The increase is a result of the $1.2 billion of senior notes issued in February 2012, coupled with lower capitalized interest due primarily to the completion of construction on three of our newbuild drillships. During the Current Quarter, we capitalized approximately 55 percent of total interest charges versus approximately 74 percent during the Comparable Quarter.

Income Tax Provision—Our income tax provision increased $8 million in the Current Quarter as a result of a higher effective tax rate during the Current Quarter. The increase in the income tax rate was primarily due to fewer discrete tax benefits recognized during the Current Quarter.

For the Nine Months Ended September 30, 2012 and 2011

Net income attributable to Noble Corporation (“Noble-Swiss”) for the nine months ended September 30, 2012 (the “Current Period”) was $395 million, or $1.55 per diluted share, on operating revenues of $2.6 billion, compared to net income for the nine months ended September 30, 2011 (the “Comparable Period”) of $244 million, or $0.96 per diluted share, on operating revenues of $1.9 billion.

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The consolidated financial statements of Noble-Swiss include the accounts of Noble-Cayman; Noble-Swiss conducts substantially all of its business through Noble-Cayman and its subsidiaries. As a result, the financial position and results of operations for Noble-Cayman, and the reasons for material changes in the amount of revenue and expense items between 2012 and 2011, would be the same as the information presented below regarding Noble-Swiss in all material respects, except operating income for Noble-Cayman for the nine months ended September 30, 2012 was $44 million higher than operating income for Noble-Swiss for the same period. The operating income difference is primarily a result of executive costs directly attributable to Noble-Swiss for operations support and stewardship related services.

Rig Utilization, Operating Days and Average Dayrates

Operating revenues and operating costs and expenses for our contract drilling services segment are dependent on three primary metrics — rig utilization, operating days and dayrates. The following table sets forth the average rig utilization, operating days and average dayrates for our rig fleet for the nine months ended September 30, 2012 and 2011:

	Average Rig Utilization (1)						Operating Days (2)							Average Dayrates
	Nine Months Ended September 30,						Nine Months Ended September 30,							Nine Months Ended September 30,
	2012			2011			2012		2011		% Change			2012		2011		% Change
Jackups		80	%		72	%		9,447		8,407		12	%	$	95,333	$	84,084		13	%
Semisubmersibles		86	%		80	%		3,286		3,042		8	%		345,530		288,246		20	%
Drillships		64	%		61	%		1,344		1,007		33	%		291,448		251,421		16	%
Other		0	%		0	%		—		—		—			—		—		—
Total		76	%		69	%		14,077		12,456		13	%	$	172,466	$	147,476		17	%

(1) Information reflects our policy of reporting on the basis of the number of rigs in our fleet, excluding newbuild rigs under construction.

(2) Information reflects the number of days that our rigs were operating under contract.

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Contract Drilling Services

The following table sets forth the operating revenues and the operating costs and expenses for our contract drilling services segment for the nine months ended September 30, 2012 and 2011 (in thousands):

	Nine Months Ended September 30,						Change
	2012			2011			$			%
Operating revenues:
Contract drilling services	$	2,427,759		$	1,837,047		$	590,712			32	%
Reimbursables (1)		91,913			59,232			32,681			55	%
Other		258			766			(508	)		-66	%
	$	2,519,930		$	1,897,045		$	622,885			33	%
Operating costs and expenses:
Contract drilling services	$	1,292,638		$	1,001,638		$	291,000			29	%
Reimbursables (1)		74,519			45,408			29,111			64	%
Depreciation and amortization		539,698			477,568			62,130			13	%
Selling, general and administrative		73,907			72,020			1,887			3	%
Loss on impairment		12,710			—			12,710			**
Gain on contract settlements/extinguishments, net		(33,255	)		(21,202	)		(12,053	)		57	%
		1,960,217			1,575,432			384,785			24	%
Operating income	$	559,713		$	321,613		$	238,100			74	%

(1) We record reimbursements from customers for out-of-pocket expenses as operating revenues and the related direct costs as operating expenses. Changes in the amount of these reimbursables generally do not have a material effect on our financial position, results of operations or cash flows.

** Not a meaningful percentage.

Operating Revenues—Changes in contract drilling services revenues for the Current Period as compared to the Comparable Period were driven by increases in both average dayrates and operating days. The 17 percent increase in average dayrates increased revenues by approximately $352 million while the 13 percent increase in operating days increased revenue by $239 million.

The change in contract drilling services revenues relates to our semisubmersibles, jackups and drillships, which generated approximately $259 million, $194 million and $138 million more revenue, respectively, in the Current Period.

The 20 percent increase in semisubmersible average dayrates resulted in a $188 million increase in revenues from the Comparable Period while the increase in operating days of 8 percent resulted in an additional $71 million increase in revenues. The increase in semisubmersibles revenue is a result of our rigs returning to standard operating dayrates after experiencing lower standby rates due to drilling restrictions in the U.S. Gulf of Mexico in the Comparable Period, as well as the Noble Paul Romano returning to work after being stacked for most of the Comparable Period. The increase in operating days is primarily from the Noble Jim Day, the Noble Homer Ferrington, the Noble Paul Romano and the Noble Amos Runner, which all operated at full capacity during the Current Period after being off contract for the majority of the Comparable Period.

The 13 percent increase in jackup average dayrates resulted in a $106 million increase in revenues, which was coupled with a 12 percent increase in jackup operating days, resulting in an $88 million increase in revenues from the Comparable Period. The increase in average dayrates resulted from improved market conditions in the global shallow water market throughout the jackup fleet. The increase in utilization primarily related to rigs in Mexico, West Africa and the Middle East, which experienced increased operating days during the Current Period.

The increase in drillship revenues was driven by a 33 percent increase in operating days and a 16 percent increase in average dayrates, resulting in an $84 million and a $54 million increase in revenues, respectively, from the Comparable Period. The increase in both average dayrates and operating days was the result of the Noble Bully I, Noble Bully II and Noble Globetrotter I, which commenced their contracts with Shell in March 2012, April 2012 and July 2012, respectively. These increases were partially offset by the Noble Phoenix, which completed its shipyard project during the Current Period in preparation for its substitution for the Noble Muravlenko in Brazil and the Noble Leo Segerius, which was undergoing its reliability upgrade project during the Current Period but operated during a portion of the Comparable Period.

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Operating Costs and Expenses—Contract drilling services operating costs and expenses increased $291 million for the Current Period as compared to the Comparable Period. A portion of the increase is due to the crew-up and operating expenses for the recently completed rigs noted above, which have added approximately $90 million in expense during the Current Period. Excluding the additional expenses related to these rigs, our contract drilling costs increased $201 million in the Current Period from the Comparable Period. This change was primarily driven by a $59 million increase in labor due to rigs returning, or preparing to return, to work and salary increases effective in the second and third quarters of the prior year, a $37 million increase in shorebase support, a $30 million increase in maintenance and rig-related expense, a $23 million increase in mobilization due to the amortization of certain rig moves and the demobilization of rigs primarily in Mexico, a $14 million increase in rig catering, communications and other miscellaneous expenses, a $14 million increase in insurance costs related to increased premiums on our policy renewed in March 2012, an $11 million increase in safety, training and regulatory inspections, a $5 million increase in rig communications and rental equipment, a $4 million increase in rotation costs and a $4 million increase in fuel and transportation costs.

The increase in depreciation and amortization in the Current Period from the Comparable Period was attributable to assets placed in service during the Current Period, including the Noble Bully I, Noble Bully II and the Noble Globetrotter I.

Loss on impairment during the Current Period related to an impairment charge on our submersible fleet, primarily as a result of the declining market outlook for drilling services for this rig type.

Gain on contract settlements/extinguishments during the Current Period related to a $28 million gain on the settlement of an action with certain vendors for damages sustained during Hurricane Ike. Additionally, we received $5 million from a claims settlement on the Noble David Tinsley, which had experienced a “punch-through” while being positioned on location in 2009.

Other

The following table sets forth the operating revenues and the operating costs and expenses for our other services for the nine months ended September 30, 2012 and 2011:

	Nine Months Ended September 30,				Change
	2012		2011		$			%
Operating revenues:
Labor contract drilling services	$	58,538	$	43,123	$	15,415			36	%
Reimbursables (1)		2,177		4,619		(2,442	)		-53	%
	$	60,715	$	47,742	$	12,973			27	%
Operating costs and expenses:
Labor contract drilling services	$	34,070	$	25,326	$	8,744			35	%
Reimbursables (1)		2,099		4,389		(2,290	)		-52	%
Depreciation and amortization		10,081		9,886		195			2	%
Selling, general and administrative		1,481		863		618			72	%
Loss on impairment		5,635		—		5,635			**
		53,366		40,464		12,902			32	%
Operating income	$	7,349	$	7,278	$	71			1	%

(1) We record reimbursements from customers for out-of-pocket expenses as operating revenues and the related direct costs as operating expenses. Changes in the amount of these reimbursables generally do not have a material effect on our financial position, results of operations or cash flows.

** Not a meaningful percentage.

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Operating Revenues and Costs and Expenses—The change in both revenue and expense primarily relate to the commencement of a refurbishment project with our customer, Shell, for one of its rigs to be operated under a labor contract in Alaska.

Loss on impairment during the Current Period related to an impairment charge on certain corporate assets, as a result of a declining market for, and the potential disposal of, the assets.

Other Income and Expenses

Interest Expense, net of amount capitalized—Interest expense, net of amount capitalized, increased $11 million in the Current Period as compared to the Comparable Period. The increase is primarily the result of the issuance of $1.2 billion in senior notes in February 2012.

Income Tax Provision—Our income tax provision increased $51 million in the Current Period primarily as a result of a higher pre-tax income and effective tax rate during the Current Period. The increase in pre-tax earnings generated a $34 million increase in tax expense while the increase in the income tax rate during the Current Period increased the income tax provision by $17 million. The increase in the income tax rate was primarily due to the net gain from U.S. settlement and impairment charges, coupled with various discrete tax items recognized in the Current Period in other taxing jurisdictions.

Liquidity and Capital Resources

Overview

Net cash from operating activities for the Current Period increased to $932 million from $459 million in the Comparable Period. The increase in net cash from operating activities in the Current Period was primarily attributable to a significant increase in net income. We had working capital of $462 million and $232 million at September 30, 2012 and December 31, 2011, respectively. As a result of our $1.2 billion debt offering in February 2012 partially offset by a reduction in borrowings outstanding on our Credit Facilities, total debt as a percentage of total debt plus equity increased to 36 percent at September 30, 2012 from 34 percent at December 31, 2011.

Our principal source of capital in the Current Period was cash generated from our $1.2 billion senior notes offering and net cash from operating activities of $932 million. Cash generated during the Current Period was primarily used to repay borrowings outstanding under our Credit Facilities and to fund our capital expenditure program.

Our currently anticipated future cash flow needs include the following:

• committed capital expenditures, including expenditures for newbuild projects currently underway;

• normal recurring operating expenses;

• discretionary capital expenditures, including various capital upgrades;

• payments of dividends; and

• repayment of maturing debt.

We currently expect to fund these cash flow needs with cash generated by our operations, cash on hand and borrowings under our existing Credit Facilities and commercial paper program.

At September 30, 2012, we had a total contract drilling services backlog of approximately $14.8 billion. Our backlog as of September 30, 2012 reflects a commitment of 83 percent of available operating days for the remainder of 2012 and 69 percent for 2013. See additional information regarding our backlog at “Contract Drilling Services Backlog.”

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Capital Expenditures

Our primary use of available liquidity during 2012 is for capital expenditures. Capital expenditures, including capitalized interest, totaled $1.2 billion and $2.0 billion for the nine months ended September 30, 2012 and 2011, respectively.

At September 30, 2012, we had 11 rigs under construction, and capital expenditures, excluding capitalized interest, for new construction during the first nine months of 2012 totaled $441 million, as follows (in millions):

Rig type/name
Currently under construction
Drillships
Noble Globetrotter II	$	187.3
Noble Don Taylor (formerly HHI Drillship I)		63.0
Noble Bob Douglas (formerly HHI Drillship II)		57.0
Noble Sam Croft (formerly HHI Drillship III)		2.4
HHI Drillship IV		2.4
Jackups
Noble Sam Turner (formerly Noble Jackup IV)		47.2
Noble Regina Allen (formerly Noble Jackup I)		6.0
Noble Mick O’Brien (formerly Noble Jackup II)		4.0
Noble Houston Colbert (formerly Noble Jackup III)		3.0
Noble Tom Prosser (formerly Noble Jackup V)		1.7
Noble Jackup VI		1.6
Recently completed construction projects
Noble Globetrotter I		41.5
Noble Bully II		18.7
Noble Bully I		4.7
Total Newbuild Capital Expenditures	$	440.5

In addition to the newbuild expenditures noted above, capital expenditures for the nine months ended September 30, 2012 consisted of the following:

• $548 million for major projects, including $50 million in subsea related expenditures and $29 million to upgrade two drillships currently operating in Brazil;

• $150 million for other capitalized expenditures, including upgrades and replacements to drilling equipment that generally have a useful life ranging from 3 to 5 years; and

• $108 million in capitalized interest.

Our total capital expenditure estimate for 2012 is approximately $1.8 billion, including capitalized interest, which may fluctuate as a result of the timing of completion of ongoing projects.

In connection with our capital expenditure program, as of September 30, 2012, we had outstanding commitments, including shipyard and purchase commitments, for approximately $3.0 billion, of which we expect to spend approximately $1.8 billion within the next twelve months.

From time to time we consider possible projects that would require expenditures that are not included in our capital budget, and such unbudgeted expenditures could be significant. In addition, we will continue to evaluate acquisitions of drilling units from time to time. Other factors that could cause actual capital expenditures to materially exceed expected amounts include delays and cost overruns in shipyards (including costs attributable to labor shortages), shortages of equipment, latent damage or deterioration to hull, equipment and machinery in excess of engineering estimates and assumptions, changes in governmental regulations and requirements and changes in design criteria or specifications during repair or construction.

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Dividends

Our most recent quarterly payment to shareholders, totaling approximately $33 million (or $0.13 per share) was declared on July 27, 2012 and paid on August 16, 2012 to holders of record on August 6, 2012. This payment represented the first tranche of our previously approved payment to shareholders discussed below.

In April 2012, our shareholders approved the payment of a dividend aggregating $0.52 per share to be paid in four equal installments the first of which was paid in August 2012, with the remaining three installments to be paid in November 2012, February 2013 and May 2013, respectively. These dividends will require us to make cash payments of approximately $33 million in the fourth quarter of 2012, based on the number of shares currently outstanding. As of September 30, 2012, we had $100 million of dividends payable outstanding on this obligation. Any additional issuances of shares would further increase our obligation.

The declaration and payment of dividends in the future by Noble-Swiss or the distributions of capital, including returns of capital in the form of par value reductions, require authorization of the shareholders of Noble-Swiss. The amount of such dividends, distributions and returns of capital will depend on our results of operations, financial condition, cash requirements, future business prospects, contractual restrictions and other factors deemed relevant by our Board of Directors and shareholders.

Credit Facilities and Long-Term Debt

During June 2012, we replaced our $575 million credit facility scheduled to mature in 2013, with a new $1.2 billion credit facility, which matures in 2017. The new facility, combined with our existing $600 million credit facility that matures in 2015, gives us a total borrowing capacity under the two facilities (together referred to as the “Credit Facilities”) of $1.8 billion. The covenants and events of default under the Credit Facilities are substantially similar, and each facility contains a covenant that limits our ratio of debt to total tangible capitalization, as defined in the Credit Facilities, to 0.60. At September 30, 2012, our ratio of debt to total tangible capitalization was less than 0.36. We were in compliance with all covenants under the Credit Facilities as of September 30, 2012.

The Credit Facilities provide us with the ability to issue up to $375 million in letters of credit in the aggregate. The issuance of letters of credit does not increase our borrowings outstanding under the Credit Facilities, but it does reduce the amount available. At September 30, 2012, we had no letters of credit outstanding under the Credit Facilities.

During September 2012, we established a commercial paper program, which will allow us to issue up to $1.8 billion in unsecured commercial paper notes. Amounts issued under the commercial paper program are supported by the unused committed capacity under our Credit Facilities and, as such, are classified as long-term on our balance sheet. Subsequent to September 30, 2012, we began issuing notes under the program and had outstanding notes totaling $328 million as of October 31, 2012.

In February 2012, we issued, through our indirect wholly-owned subsidiary, Noble Holding International Limited (“NHIL”), $1.2 billion aggregate principal amount of senior notes in three separate tranches, with $300 million of 2.50% Senior Notes due 2017, $400 million of 3.95% Senior Notes due 2022, and $500 million of 5.25% Senior Notes due 2042. The weighted average coupon of all three tranches is 4.13%. The net proceeds of approximately $1.19 billion, after expenses, were primarily used to repay the then outstanding balance on our Credit Facilities.

Our 5.875% Senior Notes mature during the second quarter of 2013. We anticipate using availability under our Credit Facilities to repay the outstanding balance; therefore, we continue to report the balance as long-term at September 30, 2012.

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. In addition, there are restrictions on incurring or assuming certain liens and sale and lease-back transactions. At September 30, 2012, we were in compliance with all our debt covenants. We continually monitor compliance with the covenants under our Credit Facilities and senior notes and, based on our expectations for 2012, expect to remain in compliance during the year.

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At September 30, 2012, we had letters of credit of $36 million and performance and tax assessment bonds totaling $318 million supported by surety bonds outstanding. Additionally, certain of our subsidiaries issue, from time to time, guarantees of the temporary import status of rigs or equipment imported into certain countries in which we operate. These guarantees are issued in lieu of payment of custom, value added or similar taxes in those countries.

Our long-term debt was $4.6 billion at September 30, 2012 as compared to $4.1 billion at December 31, 2011. The increase in debt is a result of the issuance of $1.2 billion aggregate principal amount of senior notes, partially offset by the net repayment of $630 million on the Credit Facilities during the current year. For additional information on our long-term debt, see Note 8 to our consolidated financial statements.

New Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-04, which amends FASB Accounting Standards Codification (“ASC”) Topic 820, “Fair Value Measurements and Disclosures.” This amended guidance clarifies the wording used to describe many of the requirements in accounting literature for measuring fair value and for disclosing information about fair value measurements. The goal of the amendment is to create consistency between the United States and international accounting standards. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

In June 2011, the FASB issued ASU No. 2011-05, which amends ASC Topic 220, “Comprehensive Income.” This ASU allows an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendment no longer allows an entity to show changes to other comprehensive income solely through the statement of equity. For publicly traded entities, the guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. In December 2011, the FASB issued ASU No. 2011-12, which defers only those changes in ASU 2011-05 that relate to the presentation of reclassification adjustments. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Market risk is the potential for loss from a change in the value of a financial instrument as a result of fluctuations in interest rates, currency exchange rates or equity prices, as further described below.

Interest Rate Risk

We are subject to market risk exposure related to changes in interest rates on borrowings under the Credit Facilities. Interest on borrowings under the Credit Facilities is at an agreed upon percentage point spread over LIBOR, or a base rate stated in the agreements. At September 30, 2012, we had $345 million outstanding under the Credit Facilities. Assuming our current level of debt, a change in LIBOR rates of 1 percent would increase our interest charges by approximately $3 million per year.

We maintain certain debt instruments at a fixed rate whose fair value will fluctuate based on changes in interest rates and market perceptions of our credit risk. The fair value of our long-term debt was $5.1 billion and $4.3 billion at September 30, 2012 and December 31, 2011, respectively. The increase was primarily a result of our issuance of $1.2 billion in debt in February 2012, partially offset by the net repayment of $630 million on our Credit Facilities, coupled with changes in fair value related to changes in interest rates and market perceptions of our credit risk.

Foreign Currency Risk

As a multinational company, we conduct business worldwide. Our functional currency is primarily the U.S. dollar, which is consistent with the oil and gas industry. However, outside the United States, a portion of our expenses are incurred in local currencies. Therefore, when the U.S. dollar weakens (strengthens) in relation to the currencies of the countries in which we operate, our expenses reported in U.S. dollars will increase (decrease).

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We are exposed to risks on future cash flows to the extent that local currency expenses exceed revenues denominated in local currency that are different than the functional currency. To help manage this potential risk, we periodically enter into derivative instruments to manage our exposure to fluctuations in currency exchange rates, and we may conduct hedging activities in future periods to mitigate such exposure. These contracts are primarily accounted for as cash flow hedges, with the effective portion of changes in the fair value of the hedge recorded on the Consolidated Balance Sheet and in “Accumulated other comprehensive loss” (“AOCL”). Amounts recorded in AOCL are reclassified into earnings in the same period or periods that the hedged item is recognized in earnings. The ineffective portion of changes in the fair value of the hedged item is recorded directly to earnings. We have documented policies and procedures to monitor and control the use of derivative instruments. We do not engage in derivative transactions for speculative or trading purposes, nor are we a party to leveraged derivatives.

At September 30, 2012, we had no outstanding derivative contracts. Depending on market conditions, we may elect to utilize short-term forward currency contracts in the future.

Market Risk

We have a U.S. noncontributory defined benefit pension plan that covers certain salaried employees and a U.S. noncontributory defined benefit pension plan that covers certain hourly employees, whose initial date of employment is prior to August 1, 2004 (collectively referred to as our “qualified U.S. plans”). These plans are governed by the Noble Drilling Corporation Retirement Trust. The benefits from these plans are based primarily on years of service and, for the salaried plan, employees’ compensation near retirement. These plans are designed to qualify under the Employee Retirement Income Security Act of 1974 (“ERISA”), and our funding policy is consistent with funding requirements of ERISA and other applicable laws and regulations. We make cash contributions, or utilize credits available to us, for the qualified U.S. plans when required. The benefit amount that can be covered by the qualified U.S. plans is limited under ERISA and the Internal Revenue Code of 1986 as amended. Therefore, we maintain an unfunded, nonqualified excess benefit plan designed to maintain benefits for all employees at the formula level in the qualified salary U.S. plan.

In addition to the U.S. plans, each of Noble Drilling (Land Support) Limited, Noble Enterprises Limited and Noble Drilling (Nederland) B.V., all indirect, wholly-owned subsidiaries of Noble-Swiss, maintains a pension plan that covers all of its salaried employees. Benefits are based on credited service and employees’ compensation near retirement, as defined by the plans.

Changes in market asset values related to the pension plans noted above could have a material impact upon our “Consolidated Statement of Comprehensive Income” and could result in material cash expenditures in future periods.

Item 4. Controls and Procedures

David W. Williams, Chairman, President and Chief Executive Officer of Noble-Swiss, and James A. MacLennan, Senior Vice President and Chief Financial Officer of Noble-Swiss, have evaluated the disclosure controls and procedures of Noble-Swiss as of the end of the period covered by this report. On the basis of this evaluation, Mr. Williams and Mr. MacLennan have concluded that Noble-Swiss’ disclosure controls and procedures were effective as of September 30, 2012. Noble-Swiss’ disclosure controls and procedures are designed to ensure that information required to be disclosed by Noble-Swiss in the reports that it files with or submits to the SEC is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and is accumulated and communicated to management as appropriate to allow timely decisions regarding required disclosure.

David W. Williams, President and Chief Executive Officer of Noble-Cayman, and Dennis J. Lubojacky, Vice President and Chief Financial Officer of Noble-Cayman, have evaluated the disclosure controls and procedures of Noble-Cayman as of the end of the period covered by this report. On the basis of this evaluation, Mr. Williams and Mr. Lubojacky have concluded that Noble-Cayman’s disclosure controls and procedures were effective as of September 30, 2012. Noble-Cayman’s disclosure controls and procedures are designed to ensure that information required to be disclosed by Noble-Cayman in the reports that it files with or submits to the SEC is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and is accumulated and communicated to management as appropriate to allow timely decisions regarding required disclosure.

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There was no change in either Noble-Swiss’ or Noble-Cayman’s internal control over financial reporting that occurred during the quarter ended September 30, 2012 that has materially affected, or is reasonably likely to materially affect, the internal control over financial reporting of each of Noble-Swiss or Noble-Cayman, respectively.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Information regarding legal proceedings is set forth in Notes 6, 7 and 13 to our consolidated financial statements included in Item 1 of Part I of this Quarterly Report on Form 10-Q and is incorporated herein by reference.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The following table sets forth for the periods indicated certain information with respect to purchases of shares by Noble-Swiss:

Period	Total Number of Shares Purchased		Average Price Paid per Share			Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs
July 2012		16,997	$	37.46	(1)		—		6,769,891
August 2012		835	$	38.25	(1)		—		6,769,891
September 2012		—		n/a			—		6,769,891

(1) Amounts represent shares surrendered by employees for withholding taxes payable upon the vesting of restricted stock or exercise of stock options and were not made pursuant to the share repurchase program which our Board of Directors authorized and adopted. Our repurchase program has no date of expiration.

Item 6. Exhibits

The information required by this Item 6 is set forth in the Index to Exhibits accompanying this Quarterly Report on Form 10-Q and is incorporated herein by reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Noble Corporation, a Swiss corporation

/s/ David W. Williams David W. Williams Chairman, President and Chief Executive Officer (Principal Executive Officer)	November 6, 2012 Date
/s/ James A. MacLennan James A. MacLennan Senior Vice President and Chief Financial Officer (Principal Financial Officer)
Noble Corporation, a Cayman Islands company
/s/ David W. Williams David W. Williams President and Chief Executive Officer (Principal Executive Officer)	November 6, 2012 Date
/s/ Dennis J. Lubojacky Dennis J. Lubojacky Vice President and Chief Financial Officer (Principal Financial Officer)

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Index to Exhibits

Exhibit Number	Exhibit
2.1	Agreement and Plan of Merger, Reorganization and Consolidation, dated as of December 19, 2008, among Noble Corporation, a Swiss corporation (“Noble-Swiss”), Noble Corporation, a Cayman Islands company (“Noble-Cayman”), and Noble Cayman Acquisition Ltd. (filed as Exhibit 1.1 to Noble-Cayman’s Current Report on Form 8-K filed on December 22, 2008 and incorporated herein by reference).
2.2	Amendment No. 1 to Agreement and Plan of Merger, Reorganization and Consolidation, dated as of February 4, 2009, among Noble-Swiss, Noble-Cayman and Noble Cayman Acquisition Ltd. (filed as Exhibit 2.2 to Noble-Cayman’s Current Report on Form 8-K filed on February 4, 2009 and incorporated herein by reference).
3.1	Articles of Association of Noble-Swiss (filed as Exhibit 3.1 to Noble-Swiss’ Quarterly Report on Form 10-Q filed on August 6, 2012 and incorporated herein by reference).
3.2	By-laws of Noble-Swiss (filed as Exhibit 3.2 to Noble-Swiss’ Current Report on Form 8-K filed on March 27, 2009 and incorporated herein by reference).
3.3	Memorandum and Articles of Association of Noble-Cayman (filed as Exhibit 3.1 to Noble-Cayman’s Current Report on Form 8-K filed on March 30, 2009 and incorporated herein by reference).
10.1	Form of Commercial Paper Dealer Agreement dated as of September 19, 2012 between Noble Corporation, a Cayman Islands company, Noble Holding International Limited, a Cayman Islands company, Noble Drilling Corporation, a Delaware corporation, and certain investment banks (filed as Exhibit 10.1 to Noble-Swiss’ Current Report on Form 8-K filed on September 19, 2012 and incorporated herein by reference).
10.2	Form of Issuing and Paying Agent Agreement dated as of September 19, 2012 between Noble Corporation, a Cayman Islands company and the Issuing and Paying Agent (filed as Exhibit 10.2 to Noble-Swiss’ Current Report on Form 8-K filed on September 19, 2012 and incorporated herein by reference).
31.1	Certification of David W. Williams pursuant to the U.S. Securities Exchange Act of 1934, as amended, Rule 13a-14(a) or Rule 15d-14(a), for Noble-Swiss and for Noble-Cayman.
31.2	Certification of James A. MacLennan pursuant to the U.S. Securities Exchange Act of 1934, as amended, Rule 13a- 14(a) or Rule 15d-14(a), for Noble-Swiss.
31.3	Certification of Dennis J. Lubojacky pursuant to the U.S. Securities Exchange Act of 1934, as amended, Rule 13a- 14(a) or Rule 15d-14(a), for Noble-Cayman.
32.1+	Certification of David W. Williams pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, for Noble-Swiss and for Noble-Cayman.
32.2+	Certification of James A. MacLennan pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, for Noble-Swiss.
32.3+	Certification of Dennis J. Lubojacky pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, for Noble-Cayman.
101+	Interactive Data File

* Management contract or compensatory plan or arrangement

+ Furnished in accordance with Item 601(b)(32)(ii) of Regulation S-K.

54

EX-31.1

EXHIBIT 31.1

Noble Corporation, a Swiss corporation

Noble Corporation, a Cayman Islands company

I, David W. Williams, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Noble Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 6, 2012

/s/ David W. Williams

David W. Williams

Chairman, President and Chief Executive Officer

of Noble Corporation, a Swiss corporation, and

President and Chief Executive Officer

of Noble Corporation, a Cayman Islands company

EX-31.2

EXHIBIT 31.2

Noble Corporation, a Swiss corporation

I, James A. MacLennan, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Noble Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 6, 2012

/s/ James A. MacLennan

James A. MacLennan

Senior Vice President and Chief Financial Officer

of Noble Corporation, a Swiss corporation

EX-31.3

EXHIBIT 31.3

Noble Corporation, a Cayman Islands company

I, Dennis J. Lubojacky, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Noble Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 6, 2012

/s/ Dennis J. Lubojacky

Dennis J. Lubojacky

Vice President and Chief Financial Officer

of Noble Corporation, a Cayman Islands company

EX-32.1

EXHIBIT 32.1

Noble Corporation, a Swiss corporation

Noble Corporation, a Cayman Islands company

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Noble Corporation, a Swiss corporation (“Noble-Swiss”), and Noble Corporation, a Cayman Islands company (“Noble-Cayman”) on Form 10-Q for the period ended September 30, 2012, as filed with the United States Securities and Exchange Commission on the date hereof (the “Report”), I, David W. Williams, Chairman, President and Chief Executive Officer of Noble-Swiss and President and Chief Executive Officer of Noble-Cayman, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 6, 2012	/s/ David W. Williams
	David W. Williams
	Chairman, President and Chief Executive Officer of Noble Corporation, a Swiss corporation, and President and Chief Executive Officer of Noble Corporation, a Cayman Islands company

EX-32.2

EXHIBIT 32.2

Noble Corporation, a Swiss corporation

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Noble Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2012, as filed with the United States Securities and Exchange Commission on the date hereof (the “Report”), I, James A. MacLennan, Senior Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 6, 2012	/s/ James A. MacLennan
	James A. MacLennan
	Senior Vice President and Chief Financial Officer
	of Noble Corporation, a Swiss corporation

EX-32.3

EXHIBIT 32.3

Noble Corporation, a Cayman Islands company

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Noble Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2012, as filed with the United States Securities and Exchange Commission on the date hereof (the “Report”), I, Dennis J. Lubojacky, Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 6, 2012	/s/ Dennis J. Lubojacky
	Dennis J. Lubojacky
	Vice President and Chief Financial Officer
	of Noble Corporation, a Cayman Islands company

XML

Share Data - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Remaining shares available under authorized share repurchase program	6.8
Shares repurchased under authorization	0
Additional conditionally authorizable shares without additional shareholder approval	133.1
Shareholders approved payment of dividend	0.52
Number of installments by which the installments of dividends paid	4
Total cash payments	33,000,000
Dividends payable	99,582,000
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options excluded from the diluted net income per share	1.1	1.1

XML

Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Derivative Instruments And Hedging Activities [Line Items]
Aggregate notional amount of forward contracts outstanding	$ 0

XML

Debt - Additional Information (Detail) (USD $)	9 Months Ended					1 Months Ended
	Sep. 30, 2012 CreditFacility Tranches Ratio	Sep. 30, 2011	Jun. 30, 2012	Feb. 29, 2012 2.50% Senior Notes due 2017 [Member]	Feb. 29, 2012 3.95% Senior Notes due 2022 [Member]	Feb. 29, 2012 5.25% Senior Notes due 2042 [Member]	Feb. 29, 2012 5.25% Senior Notes due 2042 [Member] Tranche Three [Member]	Sep. 30, 2012 Revolving credit facility which matures in 2017 [Member]	Sep. 30, 2012 Revolving credit facility which matures in 2015 [Member]	Sep. 30, 2012 Credit Facility [Member]	Sep. 30, 2012 Commercial Paper [Member]
Debt Instrument [Line Items]
Line of credit facility description	During June 2012, we replaced our $575 million credit facility scheduled to mature in 2013, with a new $1.2 billion credit facility, which matures in 2017. The new facility, combined with our existing $600 million credit facility that matures in 2015, gives us a total borrowing capacity under the two facilities (together referred to as the "Credit Facilities") of $1.8 billion.
Previous face value line of credit facility			$ 575,000,000
Borrowing capacity under revolving credit facilities	1,800,000,000			300,000,000	400,000,000	500,000,000		1,200,000,000	600,000,000
Number of revolving credit facility	2
Maximum debt to tangible capitalization covenant	0.60
Line of credit facility debt to tangible capitalization maximum ratio	0.36
Targeted capacity of additional revolving credit										375,000,000	1,800,000,000
Borrowings outstanding										0
Notes issued and outstanding											328,000,000
Face value of senior notes				1,200,000,000
Number of tranches	3
Interest rate on the notes issued to the joint venture partner				2.50%	3.95%	5.25%
Weighted average coupon of all three tranches							4.13%
Proceeds from issuance of senior notes, net of debt issuance costs	$ 1,186,636,000	$ 1,087,833,000				$ 1,190,000,000

XML

Net Unrealized gain/(loss) Related to Cash Flow Hedges Included in AOCL (Detail) (USD $) In Thousands, unless otherwise specified							3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Sep. 30, 2012 Forward Contracts [Member] Cash flow hedges [Member]	Sep. 30, 2011 Forward Contracts [Member] Cash flow hedges [Member]	Sep. 30, 2012 Forward Contracts [Member] Cash flow hedges [Member]	Sep. 30, 2011 Forward Contracts [Member] Cash flow hedges [Member]	Sep. 30, 2012 Swap [Member] Cash flow hedges [Member]	Sep. 30, 2011 Swap [Member] Cash flow hedges [Member]	Sep. 30, 2012 Swap [Member] Cash flow hedges [Member]	Sep. 30, 2011 Swap [Member] Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net unrealized gain/(loss) at beginning of period			$ (3,061)	$ (5,537)	$ 4,117	$ 1,970
Activity during period:
Cash flow hedges, settlement, during the period								(2,054)	3,061	(1,604)				(366)
Net unrealized gain on outstanding foreign currency forward contracts								(7,600)		(5,537)
Net unrealized gain/(loss) at end of period			$ (3,061)	$ (5,537)	$ 4,117	$ 1,970

XML

Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total Long-term Debt	$ 4,639,429	$ 4,071,964
Long-term debt	4,639,429	4,071,964
5.875% Senior Notes due 2013 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	299,975	299,949
7.375% Senior Notes due 2014 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	249,760	249,647
3.45% Senior Notes due 2015 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	350,000	350,000
3.05% Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	299,948	299,938
2.50% Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Long-term debt	299,844
7.50% Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	201,695	201,695
4.90% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt	498,870	498,783
4.625% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	399,515	399,480
3.95% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Long-term debt	399,075
6.20% Senior Notes due 2040 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	399,891	399,890
6.05% Senior Notes due 2041 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	397,605	397,582
5.25% Senior Notes due 2042 [Member]
Debt Instrument [Line Items]
Total Long-term Debt	498,251
Credit Facilities [Member]
Debt Instrument [Line Items]
Total Long-term Debt	$ 345,000	$ 975,000

XML

Segment and Related Information (Tables)

9 Months Ended

Sep. 30, 2012

Summarized Financial Information of Reportable Segment

Summarized financial information of our reportable segments for the three and nine months ended September 30, 2012 and 2011 for Noble-Swiss and Noble-Cayman are shown in the following table. The “Other” column includes results of labor contract drilling services in Canada and Alaska, as well as corporate related items.

	Noble-Swiss
	Three Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	860,315		$	23,717		$	884,032		$	719,546		$	18,356		$	737,902
Depreciation and amortization		191,638			3,449			195,087			162,837			3,376			166,213
Segment operating income		173,285			5,639			178,924			159,588			3,994			163,582
Interest expense, net of amount capitalized		(121	)		(25,514	)		(25,635	)		(122	)		(11,408	)		(11,530	)
Income tax (provision) / benefit		(28,307	)		3,145			(25,162	)		(18,380	)		766			(17,614	)
Segment profit / (loss)		130,983			(16,209	)		114,774			141,199			(5,882	)		135,317
Total assets (at end of period)		13,983,223			477,183			14,460,406			12,472,018			479,515			12,951,533

	Noble-Cayman
	Three Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	860,315		$	23,717		$	884,032		$	719,546		$	18,356		$	737,902
Depreciation and amortization		191,638			2,957			194,595			162,837			2,882			165,719
Segment operating income		178,185			17,502			195,687			168,509			14,387			182,896
Interest expense, net of amount capitalized		(121	)		(25,514	)		(25,635	)		(122	)		(11,408	)		(11,530	)
Income tax (provision) / benefit		(28,307	)		3,523			(24,784	)		(18,380	)		1,082			(17,298	)
Segment profit / (loss)		135,883			(4,160	)		131,723			150,120			5,594			155,714
Total assets (at end of period)		13,983,223			440,287			14,423,510			12,472,018			439,780			12,911,798

	Noble-Swiss
	Nine Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	2,519,930		$	60,715		$	2,580,645		$	1,897,045		$	47,742		$	1,944,787
Depreciation and amortization		539,698			10,081			549,779			477,568			9,886			487,454
Segment operating income		559,713			7,349			567,062			321,613			7,278			328,891
Interest expense, net of amount capitalized		(315	)		(56,468	)		(56,783	)		(1,890	)		(43,510	)		(45,400	)
Income tax (provision) / benefit		(102,005	)		8,898			(93,107	)		(48,661	)		6,180			(42,481	)
Segment profit / (loss)		434,561			(39,794	)		394,767			272,488			(28,593	)		243,895
Total assets (at end of period)		13,983,223			477,183			14,460,406			12,472,018			479,515			12,951,533

	Noble-Cayman
	Nine Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	2,519,930		$	60,715		$	2,580,645		$	1,897,045		$	47,742		$	1,944,787
Depreciation and amortization		539,698			8,573			548,271			477,568			8,442			486,010
Segment operating income		571,382			39,281			610,663			342,589			32,795			375,384
Interest expense, net of amount capitalized		(315	)		(56,468	)		(56,783	)		(1,890	)		(43,510	)		(45,400	)
Income tax (provision) / benefit		(102,005	)		10,033			(91,972	)		(48,661	)		7,181			(41,480	)
Segment profit / (loss)		446,230			(6,885	)		439,345			293,464			(1,272	)		292,192
Total assets (at end of period)		13,983,223			440,287			14,423,510			12,472,018			439,780			12,911,798

XML

Summarizes the Recognized Gains and Losses of Cash Flow Hedges and Non-designated Derivatives (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized through AOCL				$ (366)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized through AOCL
Gain/(loss) reclassified from AOCL to "other income"
Gain/(loss) recognized through "other income"				(546)
Foreign currency forward contracts [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized through AOCL		(7,600)		(5,537)
Gain/(loss) reclassified from AOCL to "other income"		(2,054)	3,061	(1,604)
Gain/(loss) recognized through "other income"
Interest rate swaps [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized through AOCL
Gain/(loss) reclassified from AOCL to "other income"				(366)
Gain/(loss) recognized through "other income"

XML

Guarantees of Registered Securities

9 Months Ended

Sep. 30, 2012

Guarantees of Registered Securities

Note 17 — Guarantees of Registered Securities

Noble-Cayman, or one or more subsidiaries of Noble-Cayman, are a co-issuer or guarantor or otherwise obligated as of September 30, 2012 as follows:

	Issuer
Notes	(Co-Issuer(s))	Guarantor(s)
$300 million 5.875% Senior Notes due 2013	Noble-Cayman	Noble Drilling Corporation (“NDC”);
		NHIL
$250 million 7.375% Senior Notes due 2014	NHIL	Noble-Cayman
$350 million 3.45% Senior Notes due 2015	NHIL	Noble-Cayman
$300 million 3.05% Senior Notes due 2016	NHIL	Noble-Cayman
$300 million 2.50% Senior Notes due 2017	NHIL	Noble-Cayman
$202 million 7.50% Senior Notes due 2019	NDC;	Noble-Cayman;
	Noble Drilling Services 6 LLC (“NDS6”)	Noble Holding (U.S.) Corporation (“NHC”);
		Noble Drilling Holding LLC (“NDH”)
$500 million 4.90% Senior Notes due 2020	NHIL	Noble-Cayman
$400 million 4.625% Senior Notes due 2021	NHIL	Noble-Cayman
$400 million 3.95% Senior Notes due 2022	NHIL	Noble-Cayman
$400 million 6.20% Senior Notes due 2040	NHIL	Noble-Cayman
$400 million 6.05% Senior Notes due 2041	NHIL	Noble-Cayman
$500 million 5.25% Senior Notes due 2042	NHIL	Noble-Cayman

The following consolidating financial statements of Noble-Cayman, NHC and NDH combined, NDC, NHIL, NDS6 and all other subsidiaries present investments in both consolidated and unconsolidated affiliates using the equity method of accounting.

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING BALANCE SHEET

September 30, 2012

(in thousands)

	Noble- Cayman		NHC and NDH Combined			NDC			NHIL		NDS6		Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
ASSETS
Current assets
Cash and cash equivalents	$	—	$	435		$	—		$	19	$	—	$	213,227		$	—		$	213,681
Accounts receivable		—		10,560			1,584			—		—		779,264			—			791,408
Taxes receivable		—		25,502			—			—		—		92,852			—			118,354
Prepaid expenses		—		444			20			—		—		61,072			—			61,536
Short-term notes receivable from affiliates		—		119,476			—			—		—		252,138			(371,614	)		—
Accounts receivable from affiliates		852,466		153,146			970,918			502,287		42,675		5,570,469			(8,091,961	)		—
Other current assets		375		640			196			—		—		110,222			—			111,433
Total current assets		852,841		310,203			972,718			502,306		42,675		7,079,244			(8,463,575	)		1,296,412
Property and equipment, at cost		—		2,616,145			75,591			—		—		13,910,239			—			16,601,975
Accumulated depreciation		—		(300,637	)		(57,520	)		—		—		(3,460,572	)		—			(3,818,729	)
Property and equipment, net		—		2,315,508			18,071			—		—		10,449,667			—			12,783,246
Notes receivable from affiliates		3,816,463		1,206,000			—			3,524,814		479,107		2,171,875			(11,198,259	)		—
Investments in affiliates		7,484,253		9,078,691			3,412,070			7,188,893		2,348,479		—			(29,512,386	)		—
Other assets		6,296		535			654			26,740		790		308,837			—			343,852
Total assets	$	12,159,853	$	12,910,937		$	4,403,513		$	11,242,753	$	2,871,051	$	20,009,623		$	(49,174,220	)	$	14,423,510
LIABILITIES AND EQUITY
Current liabilities
Short-term notes payables from affiliates	$	90,314	$	51,054		$	110,770		$	—	$	—	$	119,476		$	(371,614	)	$	—
Accounts payable		—		2,720			644			—		—		294,605			—			297,969
Accrued payroll and related costs		—		5,478			7,857			—		—		120,675			—			134,010
Accounts payable to affiliates		848,091		4,628,552			4,593			152,009		68,819		2,389,897			(8,091,961	)		—
Interest payable		6,093		—			—			17,128		630		—			—			23,851
Taxes payable		—		9,007			—			—		—		117,105			—			126,112
Other current liabilities		—		—			240			—		—		144,027			—			144,267
Total current liabilities		944,498		4,696,811			124,104			169,137		69,449		3,185,785			(8,463,575	)		726,209
Long-term debt		644,975		—			—			3,792,759		201,695		—			—			4,639,429
Notes payable to affiliates		2,840,287		648,475			—			975,000		1,342,000		5,392,497			(11,198,259	)		—
Deferred income taxes		—		—			15,731			—		—		220,120			—			235,851
Other liabilities		19,929		17,475			—			—		—		316,191			—			353,595
Total liabilities		4,449,689		5,362,761			139,835			4,936,896		1,613,144		9,114,593			(19,661,834	)		5,955,084
Commitments and contingencies
Total shareholder equity		7,710,164		7,548,176			4,263,678			6,305,857		1,257,907		10,136,768			(29,512,386	)		7,710,164
Noncontrolling interest		—		—			—			—		—		758,262			—			758,262
Total equity		7,710,164		7,548,176			4,263,678			6,305,857		1,257,907		10,895,030			(29,512,386	)		8,468,426
Total liabilities and equity	$	12,159,853	$	12,910,937		$	4,403,513		$	11,242,753	$	2,871,051	$	20,009,623		$	(49,174,220	)	$	14,423,510

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING BALANCE SHEET

December 31, 2011

(in thousands)

	Noble- Cayman		NHC and NDH Combined			NDC			NHIL		NDS6		Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
ASSETS
Current assets
Cash and cash equivalents	$	146	$	385		$	—		$	—	$	—	$	234,525		$	—		$	235,056
Accounts receivable		—		10,810			3,371			—		—		572,982			—			587,163
Taxes receivable		—		4,566			—			—		—		70,718			—			75,284
Prepaid expenses		—		453			19			—		—		32,633			—			33,105
Short-term notes receivable from affiliates		—		119,476			—			—		—		122,298			(241,774	)		—
Accounts receivable from affiliates		1,683,740		99,202			879,581			159,132		33,905		6,372,657			(9,228,217	)		—
Other current assets		—		643			196			93		—		119,177			—			120,109
Total current assets		1,683,886		235,535			883,167			159,225		33,905		7,524,990			(9,469,991	)		1,050,717
Property and equipment, at cost		—		2,737,764			75,001			—		—		12,693,229			—			15,505,994
Accumulated depreciation		—		(232,621	)		(54,599	)		—		—		(3,117,369	)		—			(3,404,589	)
Property and equipment, net		—		2,505,143			20,402			—		—		9,575,860			—			12,101,405
Notes receivable from affiliates		3,842,062		675,000			—			2,336,527		572,107		2,678,192			(10,103,888	)		—
Investments in affiliates		6,969,201		9,101,938			3,450,212			6,605,771		2,141,450		—			(28,268,572	)		—
Other assets		3,230		473			483			18,548		880		281,669			—			305,283
Total assets	$	12,498,379	$	12,518,089		$	4,354,264		$	9,120,071	$	2,748,342	$	20,060,711		$	(47,842,451	)	$	13,457,405
LIABILITIES AND EQUITY
Current liabilities
Short-term notes payables from affiliates	$	72,298	$	50,000		$	—		$	—	$	—	$	119,476		$	(241,774	)	$	—
Accounts payable		—		5,577			985			—		—		429,167			—			435,729
Accrued payroll and related costs		—		2,897			6,518			—		—		99,493			—			108,908
Accounts payable to affiliates		2,079,719		4,166,021			27,341			112,953		34,107		2,808,076			(9,228,217	)		—
Interest payable		1,891		—			—			48,116		4,412		—			—			54,419
Taxes payable		—		10,032			—			—		—		81,158			—			91,190
Other current liabilities		—		—			240			—		—		123,159			—			123,399
Total current liabilities		2,153,908		4,234,527			35,084			161,069		38,519		3,660,529			(9,469,991	)		813,645
Long-term debt		1,274,949		—			—			2,595,320		201,695		—			—			4,071,964
Notes payable to affiliates		1,667,291		1,147,500			85,000			975,000		811,000		5,418,097			(10,103,888	)		—
Deferred income taxes		—		—			15,731			—		—		227,060			—			242,791
Other liabilities		19,929		24,878			—			—		—		210,565			—			255,372
Total liabilities		5,116,077		5,406,905			135,815			3,731,389		1,051,214		9,516,251			(19,573,879	)		5,383,772
Commitments and contingencies
Total shareholder equity		7,382,302		7,111,184			4,218,449			5,388,682		1,697,128		9,853,129			(28,268,572	)		7,382,302
Noncontrolling interest		—		—			—			—		—		691,331			—			691,331
Total equity		7,382,302		7,111,184			4,218,449			5,388,682		1,697,128		10,544,460			(28,268,572	)		8,073,633
Total liabilities and equity	$	12,498,379	$	12,518,089		$	4,354,264		$	9,120,071	$	2,748,342	$	20,060,711		$	(47,842,451	)	$	13,457,405

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Three Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	36,149		$	5,061		$	—		$	—		$	809,858		$	(17,856	)	$	833,212
Reimbursables		—			389			—			—			—			27,748			—			28,137
Labor contract drilling services		—			—			—			—			—			22,667			—			22,667
Other		—			—			—			—			—			16			—			16
Total operating revenues		—			36,538			5,061			—			—			860,289			(17,856	)		884,032
Operating costs and expenses
Contract drilling services		1,355			13,948			1,919			19,636			—			425,223			(17,856	)		444,225
Reimbursables		—			216			—			—			—			20,831			—			21,047
Labor contract drilling services		—			—			—			—			—			12,991			—			12,991
Depreciation and amortization		—			15,500			1,181			—			—			177,914			—			194,595
Selling, general and administrative		426			1,447			—			9,700			1			3,913			—			15,487
Total operating costs and expenses		1,781			31,111			3,100			29,336			1			640,872			(17,856	)		688,345
Operating income (loss)		(1,781	)		5,427			1,961			(29,336	)		(1	)		219,417			—			195,687
Other income (expense)
Equity earnings in affiliates, net of tax		162,311			69,069			36,463			172,364			129,161			—			(569,368	)		—
Interest expense, net of amounts capitalized		(30,496	)		(8,964	)		(852	)		(33,509	)		(11,832	)		(20,221	)		80,239			(25,635	)
Interest income and other, net		1,689			11,080			9			37,430			2,846			28,546			(80,239	)		1,361
Income before income taxes		131,723			76,612			37,581			146,949			120,174			227,742			(569,368	)		171,413
Income tax provision		—			(8,639	)		—			—			—			(16,145	)		—			(24,784	)
Net Income		131,723			67,973			37,581			146,949			120,174			211,597			(569,368	)		146,629
Net income attributable to noncontrolling interests		—			—			—			—			—			(14,906	)		—			(14,906	)
Net income attributable to Noble Corporation		131,723			67,973			37,581			146,949			120,174			196,691			(569,368	)		131,723
Other comprehensive income, net		3,384			—			—			—			—			3,384			(3,384	)		3,384
Comprehensive income attributable to Noble Corporation	$	135,107		$	67,973		$	37,581		$	146,949		$	120,174		$	200,075		$	(572,752	)	$	135,107

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Nine Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	117,488		$	14,941		$	—		$	—		$	2,352,618		$	(57,288	)	$	2,427,759
Reimbursables		—			6,199			—			—			—			87,891			—			94,090
Labor contract drilling services		—			—			—			—			—			58,538			—			58,538
Other		—			—			—			—			—			1,190			(932	)		258
Total operating revenues		—			123,687			14,941			—			—			2,500,237			(58,220	)		2,580,645
Operating costs and expenses
Contract drilling services		3,794			42,642			5,529			56,048			—			1,231,176			(58,220	)		1,280,969
Reimbursables		—			5,641			—			—			—			70,977			—			76,618
Labor contract drilling services		—			—			—			—			—			34,070			—			34,070
Depreciation and amortization		—			45,577			3,278			—			—			499,416			—			548,271
Selling, general and administrative		1,237			4,258			—			28,137			1			11,331			—			44,964
Loss on impairment		—			—			—			—			—			18,345			—			18,345
Gain on contract settlements/extinguishments, net		—			(4,869	)		—			—			—			(28,386	)		—			(33,255	)
Total operating costs and expenses		5,031			93,249			8,807			84,185			1			1,836,929			(58,220	)		1,969,982
Operating income (loss)		(5,031	)		30,438			6,134			(84,185	)		(1	)		663,308			—			610,663
Other income (expense)
Equity earnings in affiliates, net of tax		515,132			358,234			92,343			583,122			274,564			—			(1,823,395	)		—
Interest expense, net of amounts capitalized		(76,396	)		(37,881	)		(3,040	)		(83,975	)		(31,020	)		(60,193	)		235,722			(56,783	)
Interest income and other, net		5,640			29,771			4			99,609			8,771			96,295			(235,722	)		4,368
Income before income taxes		439,345			380,562			95,441			514,571			252,314			699,410			(1,823,395	)		558,248
Income tax provision		—			(30,902	)		—			—			—			(61,070	)		—			(91,972	)
Net Income		439,345			349,660			95,441			514,571			252,314			638,340			(1,823,395	)		466,276
Net income attributable to noncontrolling interests		—			—			—			—			—			(26,931	)		—			(26,931	)
Net income attributable to Noble Corporation		439,345			349,660			95,441			514,571			252,314			611,409			(1,823,395	)		439,345
Other comprehensive income, net		2,244			—			—			—			—			2,244			(2,244	)		2,244
Comprehensive income attributable to Noble Corporation	$	441,589		$	349,660		$	95,441		$	514,571		$	252,314		$	613,653		$	(1,825,639	)	$	441,589

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Three Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	38,955		$	5,105		$	—		$	—		$	680,617		$	(19,785	)	$	704,892
Reimbursables		—			691			—			—			—			16,747			—			17,438
Labor contract drilling services		—			4			—			—			—			15,560			—			15,564
Other		—			—			—			—			—			8			—			8
Total operating revenues		—			39,650			5,105			—			—			712,932			(19,785	)		737,902
Operating costs and expenses
Contract drilling services		1,759			10,485			1,883			9,819			—			345,465			(19,785	)		349,626
Reimbursables		—			420			—			—			—			13,551			—			13,971
Labor contract drilling services		—			—			—			—			—			8,053			—			8,053
Depreciation and amortization		—			13,138			937			—			—			151,644			—			165,719
Selling, general and administrative		2,094			1,488			—			9,253			—			4,802			—			17,637
Total operating costs and expenses		3,853			25,531			2,820			19,072			—			523,515			(19,785	)		555,006
Operating income (loss)		(3,853	)		14,119			2,285			(19,072	)		—			189,417			—			182,896
Other income (expense)
Equity earnings in affiliates, net of tax		174,673			226,079			45,818			172,153			(20,624	)		—			(598,099	)		—
Interest expense, net of amounts capitalized		(16,721	)		(15,612	)		(1,285	)		(21,641	)		(7,106	)		(267	)		51,102			(11,530	)
Interest income and other, net		1,615			6,906			(40	)		15,813			2,277			26,415			(51,102	)		1,884
Income before income taxes		155,714			231,492			46,778			147,253			(25,453	)		215,565			(598,099	)		173,250
Income tax (provision) / benefit		—			487			—			—			—			(17,785	)		—			(17,298	)
Net Income		155,714			231,979			46,778			147,253			(25,453	)		197,780			(598,099	)		155,952
Net income attributable to noncontrolling interests		—			—			—			—			—			(238	)		—			(238	)
Net income attributable to Noble Corporation		155,714			231,979			46,778			147,253			(25,453	)		197,542			(598,099	)		155,714
Other comprehensive loss, net		(13,896	)		—			—			—			—			(13,896	)		13,896			(13,896	)
Comprehensive income attributable to Noble Corporation	$	141,818		$	231,979		$	46,778		$	147,253		$	(25,453	)	$	183,646		$	(584,203	)	$	141,818

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Nine Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	100,009		$	14,800		$	—		$	—		$	1,770,356		$	(48,118	)	$	1,837,047
Reimbursables		—			3,381			12			—			—			60,458			—			63,851
Labor contract drilling services		—			4			—			—			—			43,119			—			43,123
Other		—			—			—			—			—			766			—			766
Total operating revenues		—			103,394			14,812			—			—			1,874,699			(48,118	)		1,944,787
Operating costs and expenses
Contract drilling services		4,818			31,554			5,681			26,625			—			960,102			(48,118	)		980,662
Reimbursables		—			3,331			—			—			—			46,466			—			49,797
Labor contract drilling services		—			—			—			—			—			25,326			—			25,326
Depreciation and amortization		—			36,330			2,781			—			—			446,899			—			486,010
Selling, general and administrative		5,397			4,206			—			24,756			1			14,450			—			48,810
Gain on contract extinguishments, net		—			—			—			—			—			(21,202	)		—			(21,202	)
Total operating costs and expenses		10,215			75,421			8,462			51,381			1			1,472,041			(48,118	)		1,569,403
Operating income (loss)		(10,215	)		27,973			6,350			(51,381	)		(1	)		402,658			—			375,384
Other income (expense)
Equity earnings in affiliates, net of tax		350,439			328,452			80,795			344,524			86,932			—			(1,191,142	)		—
Interest expense, net of amounts capitalized		(52,985	)		(45,527	)		(4,824	)		(67,667	)		(22,048	)		(3,284	)		150,935			(45,400	)
Interest income and other, net		4,953			19,376			8			38,557			6,321			85,698			(150,935	)		3,978
Income before income taxes		292,192			330,274			82,329			264,033			71,204			485,072			(1,191,142	)		333,962
Income tax (provision) / benefit		—			6,287			—			—			—			(47,767	)		—			(41,480	)
Net Income		292,192			336,561			82,329			264,033			71,204			437,305			(1,191,142	)		292,482
Net income attributable to noncontrolling interests		—			—			—			—			—			(290	)		—			(290	)
Net income attributable to Noble Corporation		292,192			336,561			82,329			264,033			71,204			437,015			(1,191,142	)		292,192
Other comprehensive loss, net		(5,992	)		—			—			—			—			(5,992	)		5,992			(5,992	)
Comprehensive income attributable to Noble Corporation	$	286,200		$	336,561		$	82,329		$	264,033		$	71,204		$	431,023		$	(1,185,150	)	$	286,200

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

Nine Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Cash flows from operating activities
Net cash from operating activities	$	(59,614	)	$	7,563		$	8,989		$	(107,638	)	$	(25,942	)	$	1,133,499		$	—		$	956,857
Cash flows from investing activities
New construction and capital expenditures		—			(499,141	)		(1,040	)		—			—			(940,534	)		—			(1,440,715	)
Notes receivable from affiliates		—			—			—			(1,188,287	)		—			—			1,188,287			—
Net cash from investing activities		—			(499,141	)		(1,040	)		(1,188,287	)		—			(940,534	)		1,188,287			(1,440,715	)
Cash flows from financing activities
Change in bank credit facilities, net		(630,000	)		—			—			—			—			—			—			(630,000	)
Proceeds from issuance of senior notes, net		—			—			—			1,186,636			—			—			—			1,186,636
Contributions from joint venture partners		—			—			—			—			—			40,000			—			40,000
Financing costs on credit facilities		(5,014	)		—			—			—			—			—			—			(5,014	)
Distributions to parent		(129,139	)		—			—			—			—			—			—			(129,139	)
Advances (to) from affiliates		(364,666	)		491,628			(7,949	)		109,308			25,942			(254,263	)		—			—
Notes payable to affiliates		1,188,287			—			—			—			—			—			(1,188,287	)		—
Net cash from financing activities		59,468			491,628			(7,949	)		1,295,944			25,942			(214,263	)		(1,188,287	)		462,483
Net change in cash and cash equivalents		(146	)		50			—			19			—			(21,298	)		—			(21,375	)
Cash and cash equivalents, beginning of period		146			385			—			—			—			234,525			—			235,056
Cash and cash equivalents, end of period	$	—		$	435		$	—		$	19		$	—		$	213,227		$	—		$	213,681

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

Nine Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Cash flows from operating activities
Net cash from operating activities	$	(40,060	)	$	30,944		$	6,889		$	(105,014	)	$	(19,420	)	$	614,119		$	—		$	487,458
Cash flows from investing activities
New construction and capital expenditures		—			(1,135,054	)		(475	)		—			—			(880,871	)		—			(2,016,400	)
Notes receivable from affiliates		20,000			—			—			(1,096,927	)		—			200,000			876,927			—
Refund from contract extinguishments		—			—			—			—			—			18,642			—			18,642
Net cash from investing activities		20,000			(1,135,054	)		(475	)		(1,096,927	)		—			(662,229	)		876,927			(1,997,758	)
Cash flows from financing activities
Change in bank credit facilities, net		675,000			—			—			—			—			—			—			675,000
Proceeds from issuance of senior notes, net		—			—			—			1,087,833			—			—			—			1,087,833
Contributions from joint venture partners		—			—			—			—			—			481,000			—			481,000
Payments of joint venture debt		—			—			—			—			—			(693,494	)		—			(693,494	)
Settlement of interest rate swaps		—			—			—			—			—			(29,032	)		—			(29,032	)
Financing costs on credit facilities		(2,835	)		—			—			—			—			—			—			(2,835	)
Distributions to parent		(149,566	)		—			—			—			—			—			—			(149,566	)
Advances (to) from affiliates		(355,081	)		1,121,756			28,586			114,108			19,420			(928,789	)		—			—
Notes payable to affiliates		(147,500	)		(17,500	)		(35,000	)		—			—			1,076,927			(876,927	)		—
Net cash from financing activities		20,018			1,104,256			(6,414	)		1,201,941			19,420			(93,388	)		(876,927	)		1,368,906
Net change in cash and cash equivalents		(42	)		146			—			—			—			(141,498	)		—			(141,394	)
Cash and cash equivalents, beginning of period		42			146			—			—			—			333,211			—			333,399
Cash and cash equivalents, end of period	$	—		$	292		$	—		$	—		$	—		$	191,713		$	—		$	192,005

XML

Estimated Fair Value of Our Long-Term Debt (Parenthetical) (Detail)	Sep. 30, 2012
7.375% Senior Notes due 2014 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	7.375%
3.45% Senior Notes due 2015 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.45%
3.05% Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.05%
2.50% Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	2.50%
7.50% Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	7.50%
4.90% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	4.90%
4.625% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	4.625%
3.95% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.95%
6.20% Senior Notes due 2040 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	6.20%
6.05% Senior Notes due 2041 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	6.05%
5.25% Senior Notes due 2042 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	5.25%

XML

Property and Equipment - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Rigs	Sep. 30, 2011
Property, Plant and Equipment [Line Items]
Capital expenditure			$ 1,200,000,000	$ 2,000,000,000
New construction			441,000,000
Amount included in capital expenditure for major project upgrades			548,000,000
Amount included in other capital expenditure for upgrading drillships			29,000,000
Number of drillships operating under contracts in Brazil			2
Other capital expenditure			150,000,000
Major capitalized expenditure useful life minimum			3 years
Major capitalized expenditure useful life maximum			5 years
Capitalized Interest			108,000,000
Capitalized interest on construction in progress	31,000,000	32,000,000	108,000,000	88,000,000
Subsea [Member]
Property, Plant and Equipment [Line Items]
Amount included in capital expenditure for major project upgrades			$ 50,000,000

XML

Consolidated Joint Ventures - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012 Rigs Jointventures	Apr. 30, 2011
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Percent of Interest in Joint ventures	50.00%
Number of joint ventures acquired	2
Number of bully class drillships	2
Capital call on joint venture		$ 360,000,000
Additional capital contributed	0
Carrying amount of the drillships	$ 1,500,000,000

XML

Pension Costs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,072	$ 1,141	$ 3,306	$ 3,387
Interest cost	1,317	1,433	4,025	4,256
Return on plan assets	(1,313)	(1,449)	(4,001)	(4,306)
Amortization of prior service cost
Amortization of transition obligation		19		56
Recognized net actuarial loss	199	123	600	366
Net pension expense	1,275	1,267	3,930	3,759
U.S., Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,431	2,152	7,237	6,456
Interest cost	2,196	2,143	6,556	6,428
Return on plan assets	(2,793)	(2,768)	(8,379)	(8,304)
Amortization of prior service cost	57	57	171	170
Amortization of transition obligation
Recognized net actuarial loss	1,885	844	5,563	2,531
Net pension expense	$ 3,776	$ 2,428	$ 11,148	$ 7,281

XML

Effect of Changes in Other Assets and Liabilities on Cash Flows from Operating Activities (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Capital [Line Items]
Accounts receivable	$ (163,051)	$ (213,747)
Other current assets	(58,303)	(23,900)
Other assets	(25,543)	(37,171)
Accounts payable	29,470	(23,744)
Other current liabilities	76,035	21,281
Other liabilities	70,382	33,566
Net change in other assets and liabilities	(71,010)	(243,715)
Noble-Cayman [Member]
Operating Capital [Line Items]
Accounts receivable	(163,051)	(213,747)
Other current assets	(59,764)	(20,578)
Other assets	(25,546)	(39,649)
Accounts payable	29,353	(23,654)
Other current liabilities	79,436	13,655
Other liabilities	64,215	33,540
Net change in other assets and liabilities	$ (75,357)	$ (250,433)

XML

Debt (Parenthetical) (Detail)	Sep. 30, 2012
5.875% Senior Notes due 2013 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	5.875%
7.375% Senior Notes due 2014 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	7.375%
3.45% Senior Notes due 2015 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.45%
3.05% Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.05%
2.50% Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	2.50%
7.50% Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	7.50%
4.90% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	4.90%
4.625% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	4.625%
3.95% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.95%
6.20% Senior Notes due 2040 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	6.20%
6.05% Senior Notes due 2041 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	6.05%
5.25% Senior Notes due 2042 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	5.25%

XML

Organization and Basis of Presentation

9 Months Ended

Sep. 30, 2012

Organization and Basis of Presentation

Note 1 — Organization and Basis of Presentation

Noble Corporation, a Swiss corporation (“Noble-Swiss”), is a leading provider of offshore contract drilling services for the oil and gas industry. Our fleet of 79 mobile offshore drilling units consists of 14 semisubmersibles, 14 drillships, 49 jackups and two submersibles. Additionally, we have one floating production storage and offloading unit. Our fleet includes 11 units under construction as follows:

• five dynamically positioned, ultra-deepwater, harsh environment drillships and

• six high-specification heavy-duty, harsh environment jackup rigs.

Our global fleet is currently located in the following areas: the U.S. Gulf of Mexico and Alaska, Mexico, Brazil, the North Sea, the Mediterranean, West Africa, the Middle East, India, Australia and the Asian Pacific. Noble and its predecessors have been engaged in the contract drilling of oil and gas wells since 1921.

Noble Corporation, a Cayman Islands company (“Noble-Cayman”) is a direct, wholly-owned subsidiary of Noble-Swiss, our publicly-traded parent company. Noble-Swiss’ principal asset is all of the shares of Noble-Cayman. Noble-Cayman has no public equity outstanding. The consolidated financial statements of Noble-Swiss include the accounts of Noble-Cayman, and Noble-Swiss conducts substantially all of its business through Noble-Cayman and its subsidiaries.

The accompanying unaudited consolidated financial statements of Noble-Swiss 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 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, 2011 Consolidated Balance Sheets presented herein are derived from the December 31, 2011 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, 2011, filed by both Noble-Swiss and Noble-Cayman. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year.

Certain amounts in prior periods have been reclassified to conform to the current year presentation.

XML

Guarantees of Registered Securities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
5.875% Senior Notes due 2013 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	$ 299,975	$ 299,949
Interest rate on the notes	5.875%
7.375% Senior Notes due 2014 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	249,760	249,647
Interest rate on the notes	7.375%
3.45% Senior Notes due 2015 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	350,000	350,000
Interest rate on the notes	3.45%
3.05% Senior Notes due 2016 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	299,948	299,938
Interest rate on the notes	3.05%
2.50% Senior Notes due 2017 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	299,844
Interest rate on the notes	2.50%
7.50% Senior Notes due 2019 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	201,695	201,695
Interest rate on the notes	7.50%
4.90% Senior Notes due 2020 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	498,870	498,783
Interest rate on the notes	4.90%
4.625% Senior Notes due 2021 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	399,515	399,480
Interest rate on the notes	4.625%
3.95% Senior Notes due 2022 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	399,075
Interest rate on the notes	3.95%
6.20% Senior Notes due 2040 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	399,891	399,890
Interest rate on the notes	6.20%
6.05% Senior Notes due 2041 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	397,605	397,582
Interest rate on the notes	6.05%
5.25% Senior Notes due 2042 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	498,251
Interest rate on the notes	5.25%
Noble-Cayman [Member] | 5.875% Senior Notes due 2013 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	300,000
Interest rate on the notes	5.875%
Noble-Cayman [Member] | 7.375% Senior Notes due 2014 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	250,000
Interest rate on the notes	7.375%
Noble-Cayman [Member] | 3.45% Senior Notes due 2015 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	350,000
Interest rate on the notes	3.45%
Noble-Cayman [Member] | 3.05% Senior Notes due 2016 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	300,000
Interest rate on the notes	3.05%
Noble-Cayman [Member] | 2.50% Senior Notes due 2017 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	300,000
Interest rate on the notes	2.50%
Noble-Cayman [Member] | 7.50% Senior Notes due 2019 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	202,000
Interest rate on the notes	7.50%
Noble-Cayman [Member] | 4.90% Senior Notes due 2020 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	500,000
Interest rate on the notes	4.90%
Noble-Cayman [Member] | 4.625% Senior Notes due 2021 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	400,000
Interest rate on the notes	4.625%
Noble-Cayman [Member] | 3.95% Senior Notes due 2022 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	400,000
Interest rate on the notes	3.95%
Noble-Cayman [Member] | 6.20% Senior Notes due 2040 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	400,000
Interest rate on the notes	6.20%
Noble-Cayman [Member] | 6.05% Senior Notes due 2041 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	400,000
Interest rate on the notes	6.05%
Noble-Cayman [Member] | 5.25% Senior Notes due 2042 [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Outstanding principal balance	$ 500,000
Interest rate on the notes	5.25%

XML

Loss on Impairment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Rigs
Submersible rig fleet [Member]
Impaired Long Lived Assets Held For Disposed Off By Type [Line Items]
Number of cold stacked rigs	2
Submersible rig fleet [Member] | Level 2 [Member]
Impaired Long Lived Assets Held For Disposed Off By Type [Line Items]
Impairment related charges	13
Corporate Assets [Member] | Level 2 [Member]
Impaired Long Lived Assets Held For Disposed Off By Type [Line Items]
Impairment related charges	5

XML

Debt (Tables)

9 Months Ended

Sep. 30, 2012

Debt

Total debt consisted of the following at September 30, 2012 and December 31, 2011:

	September 30, 2012		December 31, 2011
Wholly-owned debt instruments:
5.875% Senior Notes due 2013	$	299,975	$	299,949
7.375% Senior Notes due 2014		249,760		249,647
3.45% Senior Notes due 2015		350,000		350,000
3.05% Senior Notes due 2016		299,948		299,938
2.50% Senior Notes due 2017		299,844		—
7.50% Senior Notes due 2019		201,695		201,695
4.90% Senior Notes due 2020		498,870		498,783
4.625% Senior Notes due 2021		399,515		399,480
3.95% Senior Notes due 2022		399,075		—
6.20% Senior Notes due 2040		399,891		399,890
6.05% Senior Notes due 2041		397,605		397,582
5.25% Senior Notes due 2042		498,251		—
Credit facilities		345,000		975,000
Total long-term debt	$	4,639,429	$	4,071,964

Estimated Fair Value of Our Long-Term Debt

The following table presents the estimated fair value of our long-term debt as of September 30, 2012 and December 31, 2011.

	September 30, 2012				December 31, 2011
	Carrying		Estimated		Carrying		Estimated
	Value		Fair Value		Value		Fair Value
Wholly-owned debt instruments
5.875% Senior Notes due 2013	$	299,975	$	308,949	$	299,949	$	317,586
7.375% Senior Notes due 2014		249,760		272,063		249,647		278,966
3.45% Senior Notes due 2015		350,000		369,921		350,000		363,571
3.05% Senior Notes due 2016		299,948		314,142		299,938		306,057
2.50% Senior Notes due 2017		299,844		309,118		—		—
7.50% Senior Notes due 2019		201,695		249,768		201,695		248,623
4.90% Senior Notes due 2020		498,870		559,783		498,783		531,437
4.625% Senior Notes due 2021		399,515		440,799		399,480		416,847
3.95% Senior Notes due 2022		399,075		420,137		—		—
6.20% Senior Notes due 2040		399,891		466,331		399,890		450,017
6.05% Senior Notes due 2041		397,605		461,733		397,582		443,308
5.25% Senior Notes due 2042		498,251		533,637		—		—
Credit Facilities		345,000		345,000		975,000		975,000
Total long-term debt	$	4,639,429	$	5,051,381	$	4,071,964	$	4,331,412

XML

Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2012

Property and Equipment

Property and equipment, at cost, as of September 30, 2012 and December 31, 2011 consisted of the following:

	September 30,		December 31,
	2012		2011
Drilling equipment and facilities	$	13,449,855	$	10,974,943
Construction in progress		2,991,487		4,367,750
Other		196,284		197,485
	$	16,637,626	$	15,540,178

XML

Summarize the Financial Statement Presentation and Fair Value of Derivative Positions (Detail) (Short-term foreign currency forward contracts [Member], Other current liabilities [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Short-term foreign currency forward contracts [Member] | Other current liabilities [Member]
Liability derivatives
Cash flow hedges, Estimated fair value		$ 3,061

XML

Gain on Contract Settlements/Extinguishments, net - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended
	Feb. 28, 2011	Mar. 31, 2011	Jun. 30, 2012	Sep. 30, 2012	Sep. 30, 2011
Legal Settlement By Party [Line Items]
Net gain recognized on settlement included in other income			$ 28,000,000
Incident charge			17,000,000
Gain on contract extinguishments				33,255,000	21,202,000
Non cash charges related to contract termination				32,600,000
Repayment of Bully credit facilities	693,000,000				693,494,000
Gain recognized on settlement and termination of interest rate swaps		1,300,000
Noble David Tinsley [Member]
Legal Settlement By Party [Line Items]
Net gain recognized on settlement included in other income			5,000,000
Noble Phoenix [Member]
Legal Settlement By Party [Line Items]
Gain on contract extinguishments		$ 52,500,000

XML

Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Pension Costs

Pension costs include the following components:

	Three Months Ended September 30,
	2012						2011
	Non-U.S.			U.S.			Non-U.S.			U.S.
Service cost	$	1,072		$	2,431		$	1,141		$	2,152
Interest cost		1,317			2,196			1,433			2,143
Return on plan assets		(1,313	)		(2,793	)		(1,449	)		(2,768	)
Amortization of prior service cost		—			57			—			57
Amortization of transition obligation		—			—			19			—
Recognized net actuarial loss		199			1,885			123			844
Net pension expense	$	1,275		$	3,776		$	1,267		$	2,428
	Nine Months Ended September 30,
	2012						2011
	Non-U.S.			U.S.			Non-U.S.			U.S.
Service cost	$	3,306		$	7,237		$	3,387		$	6,456
Interest cost		4,025			6,556			4,256			6,428
Return on plan assets		(4,001	)		(8,379	)		(4,306	)		(8,304	)
Amortization of prior service cost		—			171			—			170
Amortization of transition obligation		—			—			56			—
Recognized net actuarial loss		600			5,563			366			2,531
Net pension expense	$	3,930		$	11,148		$	3,759		$	7,281

XML

Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2012

Net Unrealized gain/(loss) Related to Cash Flow Hedges Included in AOCL

The balance of the net unrealized gain/(loss) related to our cash flow hedges included in “Accumulated other comprehensive loss” (“AOCL”) and related activity is as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
Net unrealized gain/(loss) at beginning of period	$	—	$	4,117		$	(3,061	)	$	1,970
Activity during period:
Settlement of foreign currency forward contracts during the period		—		(2,054	)		3,061			(1,604	)
Settlement of interest rate swaps during the period		—		—			—			(366	)
Net unrealized loss on outstanding foreign currency forward contracts		—		(7,600	)		—			(5,537	)
Net unrealized gain/(loss) at end of period	$	—	$	(5,537	)	$	—		$	(5,537	)

Summarize the Financial Statement Presentation and Fair Value of Derivative Positions

The following tables, together with Note 12, summarize the financial statement presentation and fair value of our derivative positions as of September 30, 2012 and December 31, 2011:

		Estimated fair value
	Balance sheet classification	September 30, 2012		December 31, 2011
Liability derivatives
Cash flow hedges
Short-term foreign currency forward contracts	Other current liabilities	$	—	$	3,061

Summarizes the Recognized Gains and Losses of Cash Flow Hedges and Non-designated Derivatives

To supplement the fair value disclosures in Note 12, the following summarizes the recognized gains and losses of cash flow hedges and non-designated derivatives through AOCL or through “other income” for the three months ended September 30, 2012 and 2011:

	Gain/(loss) recognized through AOCL					Gain/(loss) reclassified from AOCL to  “other income”					Gain/(loss) recognized through “other income”
	2012		2011			2012		2011			2012		2011
Cash flow hedges
Foreign currency forward contracts	$	—	$	(7,600	)	$	—	$	(2,054	)	$	—	$	—

To supplement the fair value disclosures in Note 12, the following summarizes the recognized gains and losses of cash flow hedges and non-designated derivatives through AOCL or through “other income” for the nine months ended September 30, 2012 and 2011:

	Gain/(loss) recognized through AOCL					Gain/(loss) reclassified from AOCL to  “other income”					Gain/(loss) recognized through “other income”
	2012		2011			2012		2011			2012		2011
Cash flow hedges
Foreign currency forward contracts	$	—	$	(5,537	)	$	3,061	$	(1,604	)	$	—	$	—
Interest rate swaps		—		—			—		(366	)		—		—
Non-designated derivatives
Foreign currency forward contracts	$	—	$	—		$	—	$	—		$	—	$	(546	)

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CONSOLIDATED STATEMENT OF EQUITY (USD $) In Thousands, unless otherwise specified	Total	Noble-Cayman [Member]	Shares [Member]	Shares [Member] Noble-Cayman [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Noble-Cayman [Member]	Retained Earnings [Member]	Retained Earnings [Member] Noble-Cayman [Member]	Treasury Shares [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member] Noble-Cayman [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member] Noble-Cayman [Member]
Beginning Balance at Dec. 31, 2010	$ 7,287,634	$ 7,260,655	$ 917,684	$ 26,125	$ 39,006	$ 416,232	$ 6,630,500	$ 6,743,887	$ (373,967)	$ (50,220)	$ (50,220)	$ 124,631	$ 124,631
Beginning Balance (shares) at Dec. 31, 2010			262,415	261,246
Employee related equity activity
Issuance of share-based compensation shares, shares			248
Exercise of stock options, shares			490
Restricted shares forfeited or repurchased for taxes, shares			(319)
Amortization of share-based compensation	26,857				26,857
Issuance of share-based compensation shares	7		844		(837)
Exercise of stock options	8,733		1,629		7,104
Tax benefit of stock options exercised	278				278
Restricted shares forfeited or repurchased for taxes	(10,211)		(1,107)		1,107				(10,211)
Retirement of treasury shares, shares			(10,116)
Employee related equity activity
Retirement of treasury shares			(33,035)				(340,612)		373,647
Settlement of FIN48 provision	15,658	15,658				15,658	15,658
Net income	244,185	292,482					243,895	292,192				290	290
Par value reduction payments	(114,453)		(89,948)		(24,505)
Capital contributions by parent- share-based compensation		15,150				15,150
Equity contribution by joint venture partner	518,973											518,973
Distributions to parent		(149,566)						(149,566)
Noncontrolling interest contributions		518,973											518,973
Other comprehensive income/loss, net	(5,992)	(5,992)								(5,992)	(5,992)
Ending Balance at Sep. 30, 2011	7,971,669	7,947,360	796,067	26,125	49,010	447,040	6,549,441	6,886,513	(10,531)	(56,212)	(56,212)	643,894	643,894
Ending Balance (shares) at Sep. 30, 2011			252,718	261,246
Beginning Balance at Jun. 30, 2011
Employee related equity activity
Settlement of FIN48 provision	15,658	15,658
Net income	135,555	155,952
Other comprehensive income/loss, net	(13,896)	(13,896)
Ending Balance at Sep. 30, 2011	7,971,669	7,947,360		26,125
Ending Balance (shares) at Sep. 30, 2011				261,246
Beginning Balance at Dec. 31, 2011	8,097,852	8,073,633	766,595	26,125	48,356	450,616	6,676,444	6,979,882	(10,553)	(74,321)	(74,321)	691,331	691,331
Beginning Balance (shares) at Dec. 31, 2011			252,639	261,246
Employee related equity activity
Issuance of share-based compensation shares, shares			428
Exercise of stock options, shares			606
Restricted shares forfeited or repurchased for taxes, shares			(374)
Amortization of share-based compensation	28,782				28,782
Issuance of share-based compensation shares	8		1,284		(1,276)
Exercise of stock options	12,671		1,722		10,949
Tax benefit of stock options exercised	1,174				1,174
Restricted shares forfeited or repurchased for taxes	(10,433)		(1,138)		1,138				(10,433)
Employee related equity activity
Net income	421,698	466,276					394,767	439,345				26,931	26,931
Par value reduction payments	(105,092)		(58,470)		(13,427)		(33,195)
Capital contributions by parent- share-based compensation		15,412				15,412
Equity contribution by joint venture partner	40,000											40,000
Distributions to parent		(129,139)						(129,139)
Dividends payable	(99,582)						(99,582)
Noncontrolling interest contributions		40,000											40,000
Other comprehensive income/loss, net	2,244	2,244								2,244	2,244
Ending Balance at Sep. 30, 2012	8,389,322	8,468,426	709,993	26,125	75,696	466,028	6,938,434	7,290,088	(20,986)	(72,077)	(72,077)	758,262	758,262
Ending Balance (shares) at Sep. 30, 2012			253,299	261,246
Beginning Balance at Jun. 30, 2012
Employee related equity activity
Net income	129,680	146,629
Other comprehensive income/loss, net	3,384	3,384
Ending Balance at Sep. 30, 2012	$ 8,389,322	$ 8,468,426		$ 26,125
Ending Balance (shares) at Sep. 30, 2012				261,246

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Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2012

Carrying Amount and Estimated Fair Value of Financial Instruments

The following table presents the carrying amount and estimated fair value of our financial instruments recognized at fair value on a recurring basis:

	September 30, 2012								December 31, 2011
			Estimated Fair Value Measurements
			Quoted		Significant
			Prices in		Other		Significant
			Active		Observable		Unobservable
	Carrying		Markets		Inputs		Inputs		Carrying		Estimated
	Amount		(Level 1)		(Level 2)		(Level 3)		Amount		Fair Value
Assets—
Marketable securities	$	5,745	$	5,745	$	—	$	—	$	4,701	$	4,701
Liabilities—
Foreign currency forward contracts	$	—	$	—	$	—	$	—	$	3,061	$	3,061

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Computation of Basic and Diluted Earnings Per Share for Noble-Swiss (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic
Net income attributable to Noble Corporation	$ 114,774	$ 135,317	$ 394,767	$ 243,895
Earnings allocated to unvested share-based payment awards	(1,192)	(1,415)	(4,008)	(2,487)
Net income to common shareholders-basic	113,582	133,902	390,759	241,408
Diluted
Net income attributable to Noble Corporation	114,774	135,317	394,767	243,895
Earnings allocated to unvested share-based payment awards	(1,190)	(1,412)	(4,002)	(2,481)
Net income to common shareholders-diluted	$ 113,584	$ 133,905	$ 390,765	$ 241,414
Weighted average shares outstanding-basic	252,657	251,580	252,339	251,327
Incremental shares issuable from assumed exercise of stock options	317	449	385	640
Weighted average shares outstanding-diluted	252,974	252,029	252,724	251,967
Weighted average unvested share-based payment awards	2,651	2,658	2,588	2,589
Earnings per share
Basic	$ 0.45	$ 0.53	$ 1.55	$ 0.96
Diluted	$ 0.45	$ 0.53	$ 1.55	$ 0.96

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Employee Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 3	$ 13
Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to non-U.S. and U.S pension plans during 2012	17	17
U.S., Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to non-U.S. and U.S pension plans during 2012	$ 17	$ 17

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CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 218,467	$ 239,196
Accounts receivable	791,408	587,163
Taxes receivable	118,540	75,284
Prepaid expenses	64,644	35,796
Other current assets	111,433	122,173
Total current assets	1,304,492	1,059,612
Property and equipment, at cost	16,637,626	15,540,178
Accumulated depreciation	(3,825,482)	(3,409,833)
Property and equipment, net	12,812,144	12,130,345
Other assets	343,770	305,202
Total assets	14,460,406	13,495,159
Current liabilities
Accounts payable	298,363	436,006
Accrued payroll and related costs	145,595	117,907
Interest payable	23,851	54,419
Taxes payable	130,551	94,920
Dividends payable	99,582
Other current liabilities	144,267	123,928
Total current liabilities	842,209	827,180
Long-term debt	4,639,429	4,071,964
Deferred income taxes	235,851	242,791
Other liabilities	353,595	255,372
Total liabilities	6,071,084	5,397,307
Commitments and contingencies
Shareholders' equity
Shares; 253,299 and 252,639 shares outstanding	709,993	766,595
Treasury shares, at cost; 586 and 287 shares	(20,986)	(10,553)
Additional paid-in capital	75,696	48,356
Retained earnings	6,938,434	6,676,444
Accumulated other comprehensive loss	(72,077)	(74,321)
Total shareholders' equity	7,631,060	7,406,521
Noncontrolling interests	758,262	691,331
Total equity	8,389,322	8,097,852
Total liabilities and equity	14,460,406	13,495,159
Noble-Cayman [Member]
Current assets
Cash and cash equivalents	213,681	235,056
Accounts receivable	791,408	587,163
Taxes receivable	118,354	75,284
Prepaid expenses	61,536	33,105
Other current assets	111,433	120,109
Total current assets	1,296,412	1,050,717
Property and equipment, at cost	16,601,975	15,505,994
Accumulated depreciation	(3,818,729)	(3,404,589)
Property and equipment, net	12,783,246	12,101,405
Other assets	343,852	305,283
Total assets	14,423,510	13,457,405
Current liabilities
Accounts payable	297,969	435,729
Accrued payroll and related costs	134,010	108,908
Interest payable	23,851	54,419
Taxes payable	126,112	91,190
Other current liabilities	144,267	123,399
Total current liabilities	726,209	813,645
Long-term debt	4,639,429	4,071,964
Deferred income taxes	235,851	242,791
Other liabilities	353,595	255,372
Total liabilities	5,955,084	5,383,772
Commitments and contingencies
Shareholders' equity
Ordinary shares; 261,246 shares outstanding	26,125	26,125
Additional paid-in capital	466,028	450,616
Retained earnings	7,290,088	6,979,882
Accumulated other comprehensive loss	(72,077)	(74,321)
Total shareholders' equity	7,710,164	7,382,302
Noncontrolling interests	758,262	691,331
Total equity	8,468,426	8,073,633
Total liabilities and equity	$ 14,423,510	$ 13,457,405

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Receivables from Customers - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Receivables From Major Customers [Line Items]
Minimum days for charter contract with FPSO	100 days
Hiring date of the new unit	Jul. 23, 2010
Labor contract drilling services		$ 22,667,000	$ 15,564,000	$ 58,538,000	$ 43,123,000
Pemex Exploracion Y Produccion [Member]
Receivables From Major Customers [Line Items]
Labor contract drilling services				14,000,000
Subsidiary of BP PLC [Member]
Receivables From Major Customers [Line Items]
Outstanding receivables		$ 35,000,000		$ 35,000,000

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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Tax provision on amortization of deferred pension plan amounts	$ 790	$ 356	$ 2,157	$ 1,061
Noble-Cayman [Member]
Tax provision on amortization of deferred pension plan amounts	$ 790	$ 356	$ 2,157	$ 1,061

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Commitments and Contingencies - Additional Information (Detail)	3 Months Ended		9 Months Ended										9 Months Ended
	Sep. 30, 2012 USD ($) LegalMatter Rigs	Sep. 30, 2011 USD ($)	Sep. 30, 2012 USD ($) LegalMatter Rigs	Sep. 30, 2011 USD ($)	Jan. 31, 2012 USD ($)	Jan. 31, 2012 BRL	Oct. 31, 2011 USD ($)	Oct. 31, 2011 BRL	Sep. 30, 2012 Foreign Tax Authority [Member] USD ($)	Sep. 30, 2012 Regional Chamber Of Federal Tax Court [Member] USD ($)	Sep. 30, 2012 Customs And Other Business Taxes [Member] USD ($)	Sep. 30, 2012 Libya [Member] Rigs	Sep. 30, 2012 Marathon Oil Company [Member] USD ($)
Organization And Basis Of Presentation [Line Items]
Number of jackups	49		49									2
Operating dayrate (per day)			$ 538,000
Drilling contract term			4 years
Revenue recognized by drilling contract	833,212,000	704,892,000	2,427,759,000	1,837,047,000									0
Number of asbestos lawsuits in which we are one of many defendants	29		29
Percentage of uncertain tax positions likelihood of being sustained			50.00%
Audit claims, additional attributable to other business tax returns									326,000,000	6,000,000	91,000,000
Maximum value of assumed risk of loss due to windstorm event per occurrence			450,000,000
Value of responsible for risk of loss due to windstorm event per occurrence			25,000,000
Physical damage deductible per occurrence on rigs range minimum			15,000,000
Physical damage deductible per occurrence on rigs range maximum			25,000,000
Loss of hire coverage applies only to 'rigs' operating under day rate			200,000
Number of days waiting period			45 days
Amount of fine assessed by the foreign government					887,000.0	1,800,000	117,000	238,000
Protection and indemnity policy, standard deductible (per occurrence)			10,000,000
Maximum liability coverage under protection and indemnity policy			$ 750,000,000
Years of effectiveness of employment agreements after the termination of employment			3 years
NIMASA surcharge on contracts performed by "vessels" in Nigerian coastal shipping trade; overturned and dismissed by Federal High Court of Nigeria			2.00%

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Guarantees of Registered Securities (Tables)

9 Months Ended

Sep. 30, 2012

Condensed Financial Statements

Noble-Cayman, or one or more subsidiaries of Noble-Cayman, are a co-issuer or guarantor or otherwise obligated as of September 30, 2012 as follows:

	Issuer
Notes	(Co-Issuer(s))	Guarantor(s)
$300 million 5.875% Senior Notes due 2013	Noble-Cayman	Noble Drilling Corporation (“NDC”);
		NHIL
$250 million 7.375% Senior Notes due 2014	NHIL	Noble-Cayman
$350 million 3.45% Senior Notes due 2015	NHIL	Noble-Cayman
$300 million 3.05% Senior Notes due 2016	NHIL	Noble-Cayman
$300 million 2.50% Senior Notes due 2017	NHIL	Noble-Cayman
$202 million 7.50% Senior Notes due 2019	NDC;	Noble-Cayman;
	Noble Drilling Services 6 LLC (“NDS6”)	Noble Holding (U.S.) Corporation (“NHC”);
		Noble Drilling Holding LLC (“NDH”)
$500 million 4.90% Senior Notes due 2020	NHIL	Noble-Cayman
$400 million 4.625% Senior Notes due 2021	NHIL	Noble-Cayman
$400 million 3.95% Senior Notes due 2022	NHIL	Noble-Cayman
$400 million 6.20% Senior Notes due 2040	NHIL	Noble-Cayman
$400 million 6.05% Senior Notes due 2041	NHIL	Noble-Cayman
$500 million 5.25% Senior Notes due 2042	NHIL	Noble-Cayman

The following consolidating financial statements of Noble-Cayman, NHC and NDH combined, NDC, NHIL, NDS6 and all other subsidiaries present investments in both consolidated and unconsolidated affiliates using the equity method of accounting.

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING BALANCE SHEET

September 30, 2012

(in thousands)

	Noble- Cayman		NHC and NDH Combined			NDC			NHIL		NDS6		Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
ASSETS
Current assets
Cash and cash equivalents	$	—	$	435		$	—		$	19	$	—	$	213,227		$	—		$	213,681
Accounts receivable		—		10,560			1,584			—		—		779,264			—			791,408
Taxes receivable		—		25,502			—			—		—		92,852			—			118,354
Prepaid expenses		—		444			20			—		—		61,072			—			61,536
Short-term notes receivable from affiliates		—		119,476			—			—		—		252,138			(371,614	)		—
Accounts receivable from affiliates		852,466		153,146			970,918			502,287		42,675		5,570,469			(8,091,961	)		—
Other current assets		375		640			196			—		—		110,222			—			111,433
Total current assets		852,841		310,203			972,718			502,306		42,675		7,079,244			(8,463,575	)		1,296,412
Property and equipment, at cost		—		2,616,145			75,591			—		—		13,910,239			—			16,601,975
Accumulated depreciation		—		(300,637	)		(57,520	)		—		—		(3,460,572	)		—			(3,818,729	)
Property and equipment, net		—		2,315,508			18,071			—		—		10,449,667			—			12,783,246
Notes receivable from affiliates		3,816,463		1,206,000			—			3,524,814		479,107		2,171,875			(11,198,259	)		—
Investments in affiliates		7,484,253		9,078,691			3,412,070			7,188,893		2,348,479		—			(29,512,386	)		—
Other assets		6,296		535			654			26,740		790		308,837			—			343,852
Total assets	$	12,159,853	$	12,910,937		$	4,403,513		$	11,242,753	$	2,871,051	$	20,009,623		$	(49,174,220	)	$	14,423,510
LIABILITIES AND EQUITY
Current liabilities
Short-term notes payables from affiliates	$	90,314	$	51,054		$	110,770		$	—	$	—	$	119,476		$	(371,614	)	$	—
Accounts payable		—		2,720			644			—		—		294,605			—			297,969
Accrued payroll and related costs		—		5,478			7,857			—		—		120,675			—			134,010
Accounts payable to affiliates		848,091		4,628,552			4,593			152,009		68,819		2,389,897			(8,091,961	)		—
Interest payable		6,093		—			—			17,128		630		—			—			23,851
Taxes payable		—		9,007			—			—		—		117,105			—			126,112
Other current liabilities		—		—			240			—		—		144,027			—			144,267
Total current liabilities		944,498		4,696,811			124,104			169,137		69,449		3,185,785			(8,463,575	)		726,209
Long-term debt		644,975		—			—			3,792,759		201,695		—			—			4,639,429
Notes payable to affiliates		2,840,287		648,475			—			975,000		1,342,000		5,392,497			(11,198,259	)		—
Deferred income taxes		—		—			15,731			—		—		220,120			—			235,851
Other liabilities		19,929		17,475			—			—		—		316,191			—			353,595
Total liabilities		4,449,689		5,362,761			139,835			4,936,896		1,613,144		9,114,593			(19,661,834	)		5,955,084
Commitments and contingencies
Total shareholder equity		7,710,164		7,548,176			4,263,678			6,305,857		1,257,907		10,136,768			(29,512,386	)		7,710,164
Noncontrolling interest		—		—			—			—		—		758,262			—			758,262
Total equity		7,710,164		7,548,176			4,263,678			6,305,857		1,257,907		10,895,030			(29,512,386	)		8,468,426
Total liabilities and equity	$	12,159,853	$	12,910,937		$	4,403,513		$	11,242,753	$	2,871,051	$	20,009,623		$	(49,174,220	)	$	14,423,510

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING BALANCE SHEET

December 31, 2011

(in thousands)

	Noble- Cayman		NHC and NDH Combined			NDC			NHIL		NDS6		Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
ASSETS
Current assets
Cash and cash equivalents	$	146	$	385		$	—		$	—	$	—	$	234,525		$	—		$	235,056
Accounts receivable		—		10,810			3,371			—		—		572,982			—			587,163
Taxes receivable		—		4,566			—			—		—		70,718			—			75,284
Prepaid expenses		—		453			19			—		—		32,633			—			33,105
Short-term notes receivable from affiliates		—		119,476			—			—		—		122,298			(241,774	)		—
Accounts receivable from affiliates		1,683,740		99,202			879,581			159,132		33,905		6,372,657			(9,228,217	)		—
Other current assets		—		643			196			93		—		119,177			—			120,109
Total current assets		1,683,886		235,535			883,167			159,225		33,905		7,524,990			(9,469,991	)		1,050,717
Property and equipment, at cost		—		2,737,764			75,001			—		—		12,693,229			—			15,505,994
Accumulated depreciation		—		(232,621	)		(54,599	)		—		—		(3,117,369	)		—			(3,404,589	)
Property and equipment, net		—		2,505,143			20,402			—		—		9,575,860			—			12,101,405
Notes receivable from affiliates		3,842,062		675,000			—			2,336,527		572,107		2,678,192			(10,103,888	)		—
Investments in affiliates		6,969,201		9,101,938			3,450,212			6,605,771		2,141,450		—			(28,268,572	)		—
Other assets		3,230		473			483			18,548		880		281,669			—			305,283
Total assets	$	12,498,379	$	12,518,089		$	4,354,264		$	9,120,071	$	2,748,342	$	20,060,711		$	(47,842,451	)	$	13,457,405
LIABILITIES AND EQUITY
Current liabilities
Short-term notes payables from affiliates	$	72,298	$	50,000		$	—		$	—	$	—	$	119,476		$	(241,774	)	$	—
Accounts payable		—		5,577			985			—		—		429,167			—			435,729
Accrued payroll and related costs		—		2,897			6,518			—		—		99,493			—			108,908
Accounts payable to affiliates		2,079,719		4,166,021			27,341			112,953		34,107		2,808,076			(9,228,217	)		—
Interest payable		1,891		—			—			48,116		4,412		—			—			54,419
Taxes payable		—		10,032			—			—		—		81,158			—			91,190
Other current liabilities		—		—			240			—		—		123,159			—			123,399
Total current liabilities		2,153,908		4,234,527			35,084			161,069		38,519		3,660,529			(9,469,991	)		813,645
Long-term debt		1,274,949		—			—			2,595,320		201,695		—			—			4,071,964
Notes payable to affiliates		1,667,291		1,147,500			85,000			975,000		811,000		5,418,097			(10,103,888	)		—
Deferred income taxes		—		—			15,731			—		—		227,060			—			242,791
Other liabilities		19,929		24,878			—			—		—		210,565			—			255,372
Total liabilities		5,116,077		5,406,905			135,815			3,731,389		1,051,214		9,516,251			(19,573,879	)		5,383,772
Commitments and contingencies
Total shareholder equity		7,382,302		7,111,184			4,218,449			5,388,682		1,697,128		9,853,129			(28,268,572	)		7,382,302
Noncontrolling interest		—		—			—			—		—		691,331			—			691,331
Total equity		7,382,302		7,111,184			4,218,449			5,388,682		1,697,128		10,544,460			(28,268,572	)		8,073,633
Total liabilities and equity	$	12,498,379	$	12,518,089		$	4,354,264		$	9,120,071	$	2,748,342	$	20,060,711		$	(47,842,451	)	$	13,457,405

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Three Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	36,149		$	5,061		$	—		$	—		$	809,858		$	(17,856	)	$	833,212
Reimbursables		—			389			—			—			—			27,748			—			28,137
Labor contract drilling services		—			—			—			—			—			22,667			—			22,667
Other		—			—			—			—			—			16			—			16
Total operating revenues		—			36,538			5,061			—			—			860,289			(17,856	)		884,032
Operating costs and expenses
Contract drilling services		1,355			13,948			1,919			19,636			—			425,223			(17,856	)		444,225
Reimbursables		—			216			—			—			—			20,831			—			21,047
Labor contract drilling services		—			—			—			—			—			12,991			—			12,991
Depreciation and amortization		—			15,500			1,181			—			—			177,914			—			194,595
Selling, general and administrative		426			1,447			—			9,700			1			3,913			—			15,487
Total operating costs and expenses		1,781			31,111			3,100			29,336			1			640,872			(17,856	)		688,345
Operating income (loss)		(1,781	)		5,427			1,961			(29,336	)		(1	)		219,417			—			195,687
Other income (expense)
Equity earnings in affiliates, net of tax		162,311			69,069			36,463			172,364			129,161			—			(569,368	)		—
Interest expense, net of amounts capitalized		(30,496	)		(8,964	)		(852	)		(33,509	)		(11,832	)		(20,221	)		80,239			(25,635	)
Interest income and other, net		1,689			11,080			9			37,430			2,846			28,546			(80,239	)		1,361
Income before income taxes		131,723			76,612			37,581			146,949			120,174			227,742			(569,368	)		171,413
Income tax provision		—			(8,639	)		—			—			—			(16,145	)		—			(24,784	)
Net Income		131,723			67,973			37,581			146,949			120,174			211,597			(569,368	)		146,629
Net income attributable to noncontrolling interests		—			—			—			—			—			(14,906	)		—			(14,906	)
Net income attributable to Noble Corporation		131,723			67,973			37,581			146,949			120,174			196,691			(569,368	)		131,723
Other comprehensive income, net		3,384			—			—			—			—			3,384			(3,384	)		3,384
Comprehensive income attributable to Noble Corporation	$	135,107		$	67,973		$	37,581		$	146,949		$	120,174		$	200,075		$	(572,752	)	$	135,107

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Nine Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	117,488		$	14,941		$	—		$	—		$	2,352,618		$	(57,288	)	$	2,427,759
Reimbursables		—			6,199			—			—			—			87,891			—			94,090
Labor contract drilling services		—			—			—			—			—			58,538			—			58,538
Other		—			—			—			—			—			1,190			(932	)		258
Total operating revenues		—			123,687			14,941			—			—			2,500,237			(58,220	)		2,580,645
Operating costs and expenses
Contract drilling services		3,794			42,642			5,529			56,048			—			1,231,176			(58,220	)		1,280,969
Reimbursables		—			5,641			—			—			—			70,977			—			76,618
Labor contract drilling services		—			—			—			—			—			34,070			—			34,070
Depreciation and amortization		—			45,577			3,278			—			—			499,416			—			548,271
Selling, general and administrative		1,237			4,258			—			28,137			1			11,331			—			44,964
Loss on impairment		—			—			—			—			—			18,345			—			18,345
Gain on contract settlements/extinguishments, net		—			(4,869	)		—			—			—			(28,386	)		—			(33,255	)
Total operating costs and expenses		5,031			93,249			8,807			84,185			1			1,836,929			(58,220	)		1,969,982
Operating income (loss)		(5,031	)		30,438			6,134			(84,185	)		(1	)		663,308			—			610,663
Other income (expense)
Equity earnings in affiliates, net of tax		515,132			358,234			92,343			583,122			274,564			—			(1,823,395	)		—
Interest expense, net of amounts capitalized		(76,396	)		(37,881	)		(3,040	)		(83,975	)		(31,020	)		(60,193	)		235,722			(56,783	)
Interest income and other, net		5,640			29,771			4			99,609			8,771			96,295			(235,722	)		4,368
Income before income taxes		439,345			380,562			95,441			514,571			252,314			699,410			(1,823,395	)		558,248
Income tax provision		—			(30,902	)		—			—			—			(61,070	)		—			(91,972	)
Net Income		439,345			349,660			95,441			514,571			252,314			638,340			(1,823,395	)		466,276
Net income attributable to noncontrolling interests		—			—			—			—			—			(26,931	)		—			(26,931	)
Net income attributable to Noble Corporation		439,345			349,660			95,441			514,571			252,314			611,409			(1,823,395	)		439,345
Other comprehensive income, net		2,244			—			—			—			—			2,244			(2,244	)		2,244
Comprehensive income attributable to Noble Corporation	$	441,589		$	349,660		$	95,441		$	514,571		$	252,314		$	613,653		$	(1,825,639	)	$	441,589

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Three Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	38,955		$	5,105		$	—		$	—		$	680,617		$	(19,785	)	$	704,892
Reimbursables		—			691			—			—			—			16,747			—			17,438
Labor contract drilling services		—			4			—			—			—			15,560			—			15,564
Other		—			—			—			—			—			8			—			8
Total operating revenues		—			39,650			5,105			—			—			712,932			(19,785	)		737,902
Operating costs and expenses
Contract drilling services		1,759			10,485			1,883			9,819			—			345,465			(19,785	)		349,626
Reimbursables		—			420			—			—			—			13,551			—			13,971
Labor contract drilling services		—			—			—			—			—			8,053			—			8,053
Depreciation and amortization		—			13,138			937			—			—			151,644			—			165,719
Selling, general and administrative		2,094			1,488			—			9,253			—			4,802			—			17,637
Total operating costs and expenses		3,853			25,531			2,820			19,072			—			523,515			(19,785	)		555,006
Operating income (loss)		(3,853	)		14,119			2,285			(19,072	)		—			189,417			—			182,896
Other income (expense)
Equity earnings in affiliates, net of tax		174,673			226,079			45,818			172,153			(20,624	)		—			(598,099	)		—
Interest expense, net of amounts capitalized		(16,721	)		(15,612	)		(1,285	)		(21,641	)		(7,106	)		(267	)		51,102			(11,530	)
Interest income and other, net		1,615			6,906			(40	)		15,813			2,277			26,415			(51,102	)		1,884
Income before income taxes		155,714			231,492			46,778			147,253			(25,453	)		215,565			(598,099	)		173,250
Income tax (provision) / benefit		—			487			—			—			—			(17,785	)		—			(17,298	)
Net Income		155,714			231,979			46,778			147,253			(25,453	)		197,780			(598,099	)		155,952
Net income attributable to noncontrolling interests		—			—			—			—			—			(238	)		—			(238	)
Net income attributable to Noble Corporation		155,714			231,979			46,778			147,253			(25,453	)		197,542			(598,099	)		155,714
Other comprehensive loss, net		(13,896	)		—			—			—			—			(13,896	)		13,896			(13,896	)
Comprehensive income attributable to Noble Corporation	$	141,818		$	231,979		$	46,778		$	147,253		$	(25,453	)	$	183,646		$	(584,203	)	$	141,818

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF INCOME

Nine Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Operating revenues
Contract drilling services	$	—		$	100,009		$	14,800		$	—		$	—		$	1,770,356		$	(48,118	)	$	1,837,047
Reimbursables		—			3,381			12			—			—			60,458			—			63,851
Labor contract drilling services		—			4			—			—			—			43,119			—			43,123
Other		—			—			—			—			—			766			—			766
Total operating revenues		—			103,394			14,812			—			—			1,874,699			(48,118	)		1,944,787
Operating costs and expenses
Contract drilling services		4,818			31,554			5,681			26,625			—			960,102			(48,118	)		980,662
Reimbursables		—			3,331			—			—			—			46,466			—			49,797
Labor contract drilling services		—			—			—			—			—			25,326			—			25,326
Depreciation and amortization		—			36,330			2,781			—			—			446,899			—			486,010
Selling, general and administrative		5,397			4,206			—			24,756			1			14,450			—			48,810
Gain on contract extinguishments, net		—			—			—			—			—			(21,202	)		—			(21,202	)
Total operating costs and expenses		10,215			75,421			8,462			51,381			1			1,472,041			(48,118	)		1,569,403
Operating income (loss)		(10,215	)		27,973			6,350			(51,381	)		(1	)		402,658			—			375,384
Other income (expense)
Equity earnings in affiliates, net of tax		350,439			328,452			80,795			344,524			86,932			—			(1,191,142	)		—
Interest expense, net of amounts capitalized		(52,985	)		(45,527	)		(4,824	)		(67,667	)		(22,048	)		(3,284	)		150,935			(45,400	)
Interest income and other, net		4,953			19,376			8			38,557			6,321			85,698			(150,935	)		3,978
Income before income taxes		292,192			330,274			82,329			264,033			71,204			485,072			(1,191,142	)		333,962
Income tax (provision) / benefit		—			6,287			—			—			—			(47,767	)		—			(41,480	)
Net Income		292,192			336,561			82,329			264,033			71,204			437,305			(1,191,142	)		292,482
Net income attributable to noncontrolling interests		—			—			—			—			—			(290	)		—			(290	)
Net income attributable to Noble Corporation		292,192			336,561			82,329			264,033			71,204			437,015			(1,191,142	)		292,192
Other comprehensive loss, net		(5,992	)		—			—			—			—			(5,992	)		5,992			(5,992	)
Comprehensive income attributable to Noble Corporation	$	286,200		$	336,561		$	82,329		$	264,033		$	71,204		$	431,023		$	(1,185,150	)	$	286,200

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

Nine Months Ended September 30, 2012

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Cash flows from operating activities
Net cash from operating activities	$	(59,614	)	$	7,563		$	8,989		$	(107,638	)	$	(25,942	)	$	1,133,499		$	—		$	956,857
Cash flows from investing activities
New construction and capital expenditures		—			(499,141	)		(1,040	)		—			—			(940,534	)		—			(1,440,715	)
Notes receivable from affiliates		—			—			—			(1,188,287	)		—			—			1,188,287			—
Net cash from investing activities		—			(499,141	)		(1,040	)		(1,188,287	)		—			(940,534	)		1,188,287			(1,440,715	)
Cash flows from financing activities
Change in bank credit facilities, net		(630,000	)		—			—			—			—			—			—			(630,000	)
Proceeds from issuance of senior notes, net		—			—			—			1,186,636			—			—			—			1,186,636
Contributions from joint venture partners		—			—			—			—			—			40,000			—			40,000
Financing costs on credit facilities		(5,014	)		—			—			—			—			—			—			(5,014	)
Distributions to parent		(129,139	)		—			—			—			—			—			—			(129,139	)
Advances (to) from affiliates		(364,666	)		491,628			(7,949	)		109,308			25,942			(254,263	)		—			—
Notes payable to affiliates		1,188,287			—			—			—			—			—			(1,188,287	)		—
Net cash from financing activities		59,468			491,628			(7,949	)		1,295,944			25,942			(214,263	)		(1,188,287	)		462,483
Net change in cash and cash equivalents		(146	)		50			—			19			—			(21,298	)		—			(21,375	)
Cash and cash equivalents, beginning of period		146			385			—			—			—			234,525			—			235,056
Cash and cash equivalents, end of period	$	—		$	435		$	—		$	19		$	—		$	213,227		$	—		$	213,681

NOBLE CORPORATION (NOBLE-CAYMAN) AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

Nine Months Ended September 30, 2011

(in thousands)

	Noble- Cayman			NHC and NDH Combined			NDC			NHIL			NDS6			Other Non-guarantor Subsidiaries of Noble			Consolidating Adjustments			Total
Cash flows from operating activities
Net cash from operating activities	$	(40,060	)	$	30,944		$	6,889		$	(105,014	)	$	(19,420	)	$	614,119		$	—		$	487,458
Cash flows from investing activities
New construction and capital expenditures		—			(1,135,054	)		(475	)		—			—			(880,871	)		—			(2,016,400	)
Notes receivable from affiliates		20,000			—			—			(1,096,927	)		—			200,000			876,927			—
Refund from contract extinguishments		—			—			—			—			—			18,642			—			18,642
Net cash from investing activities		20,000			(1,135,054	)		(475	)		(1,096,927	)		—			(662,229	)		876,927			(1,997,758	)
Cash flows from financing activities
Change in bank credit facilities, net		675,000			—			—			—			—			—			—			675,000
Proceeds from issuance of senior notes, net		—			—			—			1,087,833			—			—			—			1,087,833
Contributions from joint venture partners		—			—			—			—			—			481,000			—			481,000
Payments of joint venture debt		—			—			—			—			—			(693,494	)		—			(693,494	)
Settlement of interest rate swaps		—			—			—			—			—			(29,032	)		—			(29,032	)
Financing costs on credit facilities		(2,835	)		—			—			—			—			—			—			(2,835	)
Distributions to parent		(149,566	)		—			—			—			—			—			—			(149,566	)
Advances (to) from affiliates		(355,081	)		1,121,756			28,586			114,108			19,420			(928,789	)		—			—
Notes payable to affiliates		(147,500	)		(17,500	)		(35,000	)		—			—			1,076,927			(876,927	)		—
Net cash from financing activities		20,018			1,104,256			(6,414	)		1,201,941			19,420			(93,388	)		(876,927	)		1,368,906
Net change in cash and cash equivalents		(42	)		146			—			—			—			(141,498	)		—			(141,394	)
Cash and cash equivalents, beginning of period		42			146			—			—			—			333,211			—			333,399
Cash and cash equivalents, end of period	$	—		$	292		$	—		$	—		$	—		$	191,713		$	—		$	192,005

XML

Guarantees of Registered Securities (Condensed Consolidating Statement of Cash Flows) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities
Net cash from operating activities	$ 931,504	$ 459,030
Cash flows from investing activities
New construction and capital expenditures	(1,247,139)	(1,972,572)
Refund from contract extinguishments		18,642
Net cash from investing activities	(1,442,183)	(2,002,712)
Cash flows from financing activities
Proceeds from issuance of senior notes, net	1,186,636	1,087,833
Contributions from joint venture partners	40,000	481,000
Payments of joint venture debt		(693,494)
Settlement of interest rate swaps		(29,032)
Financing costs on credit facilities	(5,014)	(2,835)
Net cash from financing activities	489,950	1,402,826
Net change in cash and cash equivalents	(20,729)	(140,856)
Cash and cash equivalents, beginning of period	239,196	337,871
Cash and cash equivalents, end of period	218,467	197,015
Noble-Cayman [Member]
Cash flows from operating activities
Net cash from operating activities	(59,614)	(40,060)
Cash flows from investing activities
Notes receivable from affiliates		20,000
Net cash from investing activities		20,000
Cash flows from financing activities
Change in bank credit facilities, net	(630,000)	675,000
Financing costs on credit facilities	(5,014)	(2,835)
Distributions to parent	(129,139)	(149,566)
Advances (to) from affiliates	(364,666)	(355,081)
Notes payable to affiliates	1,188,287	(147,500)
Net cash from financing activities	59,468	20,018
Net change in cash and cash equivalents	(146)	(42)
Cash and cash equivalents, beginning of period	146	42
Cash and cash equivalents, end of period	0	0
NHC and NDH Combined [Member]
Cash flows from operating activities
Net cash from operating activities	7,563	30,944
Cash flows from investing activities
New construction and capital expenditures	(499,141)	(1,135,054)
Net cash from investing activities	(499,141)	(1,135,054)
Cash flows from financing activities
Advances (to) from affiliates	491,628	1,121,756
Notes payable to affiliates		(17,500)
Net cash from financing activities	491,628	1,104,256
Net change in cash and cash equivalents	50	146
Cash and cash equivalents, beginning of period	385	146
Cash and cash equivalents, end of period	435	292
NDC [Member]
Cash flows from operating activities
Net cash from operating activities	8,989	6,889
Cash flows from investing activities
New construction and capital expenditures	(1,040)	(475)
Net cash from investing activities	(1,040)	(475)
Cash flows from financing activities
Advances (to) from affiliates	(7,949)	28,586
Notes payable to affiliates		(35,000)
Net cash from financing activities	(7,949)	(6,414)
Net change in cash and cash equivalents	0	0
Cash and cash equivalents, end of period	0	0
NHIL [Member]
Cash flows from operating activities
Net cash from operating activities	(107,638)	(105,014)
Cash flows from investing activities
Notes receivable from affiliates	(1,188,287)	(1,096,927)
Net cash from investing activities	(1,188,287)	(1,096,927)
Cash flows from financing activities
Proceeds from issuance of senior notes, net	1,186,636	1,087,833
Advances (to) from affiliates	109,308	114,108
Net cash from financing activities	1,295,944	1,201,941
Net change in cash and cash equivalents	19	0
Cash and cash equivalents, end of period	19	0
NDS6 [Member]
Cash flows from operating activities
Net cash from operating activities	(25,942)	(19,420)
Cash flows from financing activities
Advances (to) from affiliates	25,942	19,420
Net cash from financing activities	25,942	19,420
Net change in cash and cash equivalents	0	0
Cash and cash equivalents, end of period	0	0
Other Non-guarantor Subsidiaries of Noble [Member]
Cash flows from operating activities
Net cash from operating activities	1,133,499	614,119
Cash flows from investing activities
New construction and capital expenditures	(940,534)	(880,871)
Notes receivable from affiliates		200,000
Refund from contract extinguishments		18,642
Net cash from investing activities	(940,534)	(662,229)
Cash flows from financing activities
Contributions from joint venture partners	40,000	481,000
Payments of joint venture debt		(693,494)
Settlement of interest rate swaps		(29,032)
Advances (to) from affiliates	(254,263)	(928,789)
Notes payable to affiliates		1,076,927
Net cash from financing activities	(214,263)	(93,388)
Net change in cash and cash equivalents	(21,298)	(141,498)
Cash and cash equivalents, beginning of period	234,525	333,211
Cash and cash equivalents, end of period	213,227	191,713
Consolidating Adjustments [Member]
Cash flows from investing activities
Notes receivable from affiliates	1,188,287	876,927
Net cash from investing activities	1,188,287	876,927
Cash flows from financing activities
Notes payable to affiliates	(1,188,287)	(876,927)
Net cash from financing activities	(1,188,287)	(876,927)
Net change in cash and cash equivalents	0	0
Cash and cash equivalents, end of period	0	0
Noble-Cayman [Member]
Cash flows from operating activities
Net cash from operating activities	956,857	487,458
Cash flows from investing activities
New construction and capital expenditures	(1,245,671)	(1,967,618)
Refund from contract extinguishments		18,642
Net cash from investing activities	(1,440,715)	(1,997,758)
Cash flows from financing activities
Change in bank credit facilities, net	(630,000)	675,000
Proceeds from issuance of senior notes, net	1,186,636	1,087,833
Contributions from joint venture partners	40,000	481,000
Payments of joint venture debt		(693,494)
Settlement of interest rate swaps		(29,032)
Financing costs on credit facilities	(5,014)	(2,835)
Distributions to parent	(129,139)	(149,566)
Net cash from financing activities	462,483	1,368,906
Net change in cash and cash equivalents	(21,375)	(141,394)
Cash and cash equivalents, beginning of period	235,056	333,399
Cash and cash equivalents, end of period	$ 213,681	$ 192,005

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Segment and Related Information

9 Months Ended

Sep. 30, 2012

Segment and Related Information

Note 14 — Segment and Related Information

We report our contract drilling operations as a single reportable segment, Contract Drilling Services, which reflects how we manage our business, and the fact that all of our drilling fleet is dependent upon the worldwide oil and gas industry. The mobile offshore drilling units comprising our offshore rig fleet operate in a single, global market for contract drilling services and are often redeployed globally in response to changing demands of our customers, which consist largely of major non-U.S. and government owned/controlled oil and gas companies throughout the world. Our Contract Drilling Services segment currently conducts contract drilling operations principally in the U.S. Gulf of Mexico, Mexico, Brazil, the North Sea, the Mediterranean, West Africa, the Middle East, India, Australia and the Asian Pacific.

We evaluate the performance of our operating segment primarily based on operating revenues and net income. Summarized financial information of our reportable segments for the three and nine months ended September 30, 2012 and 2011 for Noble-Swiss and Noble-Cayman are shown in the following table. The “Other” column includes results of labor contract drilling services in Canada and Alaska, as well as corporate related items.

	Noble-Swiss
	Three Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	860,315		$	23,717		$	884,032		$	719,546		$	18,356		$	737,902
Depreciation and amortization		191,638			3,449			195,087			162,837			3,376			166,213
Segment operating income		173,285			5,639			178,924			159,588			3,994			163,582
Interest expense, net of amount capitalized		(121	)		(25,514	)		(25,635	)		(122	)		(11,408	)		(11,530	)
Income tax (provision) / benefit		(28,307	)		3,145			(25,162	)		(18,380	)		766			(17,614	)
Segment profit / (loss)		130,983			(16,209	)		114,774			141,199			(5,882	)		135,317
Total assets (at end of period)		13,983,223			477,183			14,460,406			12,472,018			479,515			12,951,533

	Noble-Cayman
	Three Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	860,315		$	23,717		$	884,032		$	719,546		$	18,356		$	737,902
Depreciation and amortization		191,638			2,957			194,595			162,837			2,882			165,719
Segment operating income		178,185			17,502			195,687			168,509			14,387			182,896
Interest expense, net of amount capitalized		(121	)		(25,514	)		(25,635	)		(122	)		(11,408	)		(11,530	)
Income tax (provision) / benefit		(28,307	)		3,523			(24,784	)		(18,380	)		1,082			(17,298	)
Segment profit / (loss)		135,883			(4,160	)		131,723			150,120			5,594			155,714
Total assets (at end of period)		13,983,223			440,287			14,423,510			12,472,018			439,780			12,911,798

	Noble-Swiss
	Nine Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	2,519,930		$	60,715		$	2,580,645		$	1,897,045		$	47,742		$	1,944,787
Depreciation and amortization		539,698			10,081			549,779			477,568			9,886			487,454
Segment operating income		559,713			7,349			567,062			321,613			7,278			328,891
Interest expense, net of amount capitalized		(315	)		(56,468	)		(56,783	)		(1,890	)		(43,510	)		(45,400	)
Income tax (provision) / benefit		(102,005	)		8,898			(93,107	)		(48,661	)		6,180			(42,481	)
Segment profit / (loss)		434,561			(39,794	)		394,767			272,488			(28,593	)		243,895
Total assets (at end of period)		13,983,223			477,183			14,460,406			12,472,018			479,515			12,951,533

	Noble-Cayman
	Nine Months Ended September 30,
	2012									2011
	Contract									Contract
	Drilling									Drilling
	Services			Other			Total			Services			Other			Total
Revenues from external customers	$	2,519,930		$	60,715		$	2,580,645		$	1,897,045		$	47,742		$	1,944,787
Depreciation and amortization		539,698			8,573			548,271			477,568			8,442			486,010
Segment operating income		571,382			39,281			610,663			342,589			32,795			375,384
Interest expense, net of amount capitalized		(315	)		(56,468	)		(56,783	)		(1,890	)		(43,510	)		(45,400	)
Income tax (provision) / benefit		(102,005	)		10,033			(91,972	)		(48,661	)		7,181			(41,480	)
Segment profit / (loss)		446,230			(6,885	)		439,345			293,464			(1,272	)		292,192
Total assets (at end of period)		13,983,223			440,287			14,423,510			12,472,018			439,780			12,911,798

XML

Organization and Basis of Presentation - Additional Information (Detail) (USD $)	Sep. 30, 2012 Rigs
Description Of Business And Basis Of Presentation [Line Items]
Number of mobile offshore drilling units	79
Number of semisubmersibles	14
Number of drillships	14
Number of jackups	49
Number of submersibles	2
Number of Floating Production Storage and Offloading units ("FPSO")	1
Number of fleet units under construction	11
Number of ultra-deep water harsh environment drillships under construction	5
Number of Harsh Environment Jackup Rigs under Construction	6
Noble-Cayman [Member]
Description Of Business And Basis Of Presentation [Line Items]
Public equity outstanding	0

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Net Change in Other Assets and Liabilities

9 Months Ended

Sep. 30, 2012

Net Change in Other Assets and Liabilities

Note 16 — Net Change in Other Assets and Liabilities

The net effect of changes in other assets and liabilities on cash flows from operating activities is as follows:

	Noble-Swiss						Noble-Cayman
	Nine months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
Accounts receivable	$	(163,051	)	$	(213,747	)	$	(163,051	)	$	(213,747	)
Other current assets		(58,303	)		(23,900	)		(59,764	)		(20,578	)
Other assets		(25,543	)		(37,171	)		(25,546	)		(39,649	)
Accounts payable		29,470			(23,744	)		29,353			(23,654	)
Other current liabilities		76,035			21,281			79,436			13,655
Other liabilities		70,382			33,566			64,215			33,540
	$	(71,010	)	$	(243,715	)	$	(75,357	)	$	(250,433	)

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CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities
Net income	$ 421,698	$ 244,185
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	549,779	487,454
Loss on impairment	18,345
Gain on contract extinguishments, net	(33,255)	(21,202)
Deferred income taxes	(16,090)	(34,549)
Amortization of share-based compensation	28,782	26,857
Net change in other assets and liabilities	(71,010)	(243,715)
Net cash from operating activities	931,504	459,030
Cash flows from investing activities
Capital expenditures	(1,247,139)	(1,972,572)
Change in accrued capital expenditures	(195,044)	(48,782)
Refund from contract extinguishments		18,642
Net cash from investing activities	(1,442,183)	(2,002,712)
Cash flows from financing activities
Change in bank credit facilities, net	(630,000)	675,000
Proceeds from issuance of senior notes, net of debt issuance costs	1,186,636	1,087,833
Contributions from joint venture partners	40,000	481,000
Payments of joint venture debt		(693,494)
Settlement of interest rate swaps		(29,032)
Par value reduction/dividend payments	(105,092)	(114,453)
Financing costs on credit facilities	(5,014)	(2,835)
Proceeds from employee stock transactions	13,853	9,018
Repurchases of employee shares surrendered for taxes	(10,433)	(10,211)
Net cash from financing activities	489,950	1,402,826
Net change in cash and cash equivalents	(20,729)	(140,856)
Cash and cash equivalents, beginning of period	239,196	337,871
Cash and cash equivalents, end of period	218,467	197,015
Noble-Cayman [Member]
Cash flows from operating activities
Net income	466,276	292,482
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	548,271	486,010
Loss on impairment	18,345
Gain on contract extinguishments, net	(33,255)	(21,202)
Deferred income taxes	(16,090)	(34,549)
Capital contribution by parent- shared-based compensation	15,412	15,150
Net change in other assets and liabilities	(75,357)	(250,433)
Net cash from operating activities	956,857	487,458
Cash flows from investing activities
Capital expenditures	(1,245,671)	(1,967,618)
Change in accrued capital expenditures	(195,044)	(48,782)
Refund from contract extinguishments		18,642
Net cash from investing activities	(1,440,715)	(1,997,758)
Cash flows from financing activities
Change in bank credit facilities, net	(630,000)	675,000
Proceeds from issuance of senior notes, net of debt issuance costs	1,186,636	1,087,833
Contributions from joint venture partners	40,000	481,000
Payments of joint venture debt		(693,494)
Settlement of interest rate swaps		(29,032)
Financing costs on credit facilities	(5,014)	(2,835)
Distributions to parent company, net	(129,139)	(149,566)
Net cash from financing activities	462,483	1,368,906
Net change in cash and cash equivalents	(21,375)	(141,394)
Cash and cash equivalents, beginning of period	235,056	333,399
Cash and cash equivalents, end of period	$ 213,681	$ 192,005

XML

CONSOLIDATED BALANCE SHEET (Parenthetical) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Shares, shares outstanding	253,299	252,639
Treasury stock, shares	586	287
Ordinary shares,shares outstanding	252,713	252,352
Noble-Cayman [Member]
Ordinary shares,shares outstanding	261,246	261,246

XML

Income Taxes

9 Months Ended

Sep. 30, 2012

Income Taxes

Note 9 — Income Taxes

At December 31, 2011, the reserves for uncertain tax positions totaled $118 million (net of related tax benefits of $8 million). At September 30, 2012, the reserves for uncertain tax positions totaled $124 million (net of related tax benefits of $10 million). If the September 30, 2012 reserves are not realized, the provision for income taxes would be reduced by $124 million in future periods.

It is possible that our existing liabilities related to our reserve for uncertain tax positions may increase or decrease in the next twelve 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.

XML

Document and Entity Information	9 Months Ended
	Sep. 30, 2012	Oct. 31, 2012
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Trading Symbol	NE
Entity Registrant Name	Noble Corp / Switzerland
Entity Central Index Key	0001458891
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		252,720,353
Noble-Cayman [Member]
Entity Information [Line Items]
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		261,245,693

XML

Employee Benefit Plans

9 Months Ended

Sep. 30, 2012

Employee Benefit Plans

Note 10 — Employee Benefit Plans

Pension costs include the following components:

	Three Months Ended September 30,
	2012						2011
	Non-U.S.			U.S.			Non-U.S.			U.S.
Service cost	$	1,072		$	2,431		$	1,141		$	2,152
Interest cost		1,317			2,196			1,433			2,143
Return on plan assets		(1,313	)		(2,793	)		(1,449	)		(2,768	)
Amortization of prior service cost		—			57			—			57
Amortization of transition obligation		—			—			19			—
Recognized net actuarial loss		199			1,885			123			844
Net pension expense	$	1,275		$	3,776		$	1,267		$	2,428
	Nine Months Ended September 30,
	2012						2011
	Non-U.S.			U.S.			Non-U.S.			U.S.
Service cost	$	3,306		$	7,237		$	3,387		$	6,456
Interest cost		4,025			6,556			4,256			6,428
Return on plan assets		(4,001	)		(8,379	)		(4,306	)		(8,304	)
Amortization of prior service cost		—			171			—			170
Amortization of transition obligation		—			—			56			—
Recognized net actuarial loss		600			5,563			366			2,531
Net pension expense	$	3,930		$	11,148		$	3,759		$	7,281

During the three and nine months ended September 30, 2012, we made contributions to our pension plans totaling $3 million and $13 million, respectively. We expect the funding to our non-U.S. and U.S. plans in 2012, subject to applicable law, to be approximately $17 million.

XML

CONSOLIDATED STATEMENT OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating revenues
Contract drilling services	$ 833,212	$ 704,892	$ 2,427,759	$ 1,837,047
Reimbursables	28,137	17,438	94,090	63,851
Labor contract drilling services	22,667	15,564	58,538	43,123
Other	16	8	258	766
Total operating revenues	884,032	737,902	2,580,645	1,944,787
Operating costs and expenses
Contract drilling services	449,125	358,547	1,292,638	1,001,638
Reimbursables	21,047	13,971	76,618	49,797
Labor contract drilling services	12,991	8,053	34,070	25,326
Depreciation and amortization	195,087	166,213	549,779	487,454
Selling, general and administrative	26,858	27,536	75,388	72,883
Loss on impairment			18,345
Gain on contract settlements/extinguishments, net			(33,255)	(21,202)
Total operating costs and expenses	705,108	574,320	2,013,583	1,615,896
Operating income	178,924	163,582	567,062	328,891
Other income (expense)
Interest expense, net of amount capitalized	(25,635)	(11,530)	(56,783)	(45,400)
Interest income and other, net	1,553	1,117	4,526	3,175
Income before income taxes	154,842	153,169	514,805	286,666
Income tax provision	(25,162)	(17,614)	(93,107)	(42,481)
Net income	129,680	135,555	421,698	244,185
Net income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Net income attributable to Noble Corporation	114,774	135,317	394,767	243,895
Net income per share
Basic	$ 0.45	$ 0.53	$ 1.55	$ 0.96
Diluted	$ 0.45	$ 0.53	$ 1.55	$ 0.96
Noble-Cayman [Member]
Operating revenues
Contract drilling services	833,212	704,892	2,427,759	1,837,047
Reimbursables	28,137	17,438	94,090	63,851
Labor contract drilling services	22,667	15,564	58,538	43,123
Other	16	8	258	766
Total operating revenues	884,032	737,902	2,580,645	1,944,787
Operating costs and expenses
Contract drilling services	444,225	349,626	1,280,969	980,662
Reimbursables	21,047	13,971	76,618	49,797
Labor contract drilling services	12,991	8,053	34,070	25,326
Depreciation and amortization	194,595	165,719	548,271	486,010
Selling, general and administrative	15,487	17,637	44,964	48,810
Loss on impairment			18,345
Gain on contract settlements/extinguishments, net			(33,255)	(21,202)
Total operating costs and expenses	688,345	555,006	1,969,982	1,569,403
Operating income	195,687	182,896	610,663	375,384
Other income (expense)
Interest expense, net of amount capitalized	(25,635)	(11,530)	(56,783)	(45,400)
Interest income and other, net	1,361	1,884	4,368	3,978
Income before income taxes	171,413	173,250	558,248	333,962
Income tax provision	(24,784)	(17,298)	(91,972)	(41,480)
Net income	146,629	155,952	466,276	292,482
Net income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Net income attributable to Noble Corporation	$ 131,723	$ 155,714	$ 439,345	$ 292,192

XML

Property and Equipment

9 Months Ended

Sep. 30, 2012

Property and Equipment

Note 4 — Property and Equipment

Property and equipment, at cost, as of September 30, 2012 and December 31, 2011 consisted of the following:

	September 30,		December 31,
	2012		2011
Drilling equipment and facilities	$	13,449,855	$	10,974,943
Construction in progress		2,991,487		4,367,750
Other		196,284		197,485
	$	16,637,626	$	15,540,178

Capital expenditures, including capitalized interest, totaled $1.2 billion and $2.0 billion for the nine months ended September 30, 2012 and 2011, respectively. Capital expenditures for the first nine months of 2012 consisted of the following:

• $441 million for newbuild construction;

• $548 million for major projects, including $50 million in subsea related expenditures and $29 million to upgrade two drillships currently operating in Brazil;

• $150 million for other capitalized expenditures, including upgrades and replacements to drilling equipment, that generally have a useful life ranging from 3 to 5 years; and

• $108 million in capitalized interest.

Interest is capitalized on construction-in-progress at the weighted average cost of debt outstanding during the period of construction. Capitalized interest was $31 million and $108 million for the three and nine months ended September 30, 2012, respectively, as compared to $32 million and $88 million for the three and nine months ended September 30, 2011.

XML

Share Data

9 Months Ended

Sep. 30, 2012

Share Data

Note 3 — Share Data

Share capital

The following is a detail of Noble-Swiss’ authorized share capital as of September 30, 2012 and December 31, 2011:

	September 30, 2012		December 31, 2011
Shares outstanding and trading		252,713		252,352
Treasury shares		586		287
Total shares outstanding		253,299		252,639
Treasury shares held for share-based compensation plans		12,851		13,511
Total shares authorized for issuance		266,150		266,150
Par value per share (in Swiss Francs)		3.15		3.41

Repurchased treasury shares are recorded at cost, and include both shares repurchased pursuant to our Board of Directors approved share repurchase program and shares surrendered by employees for taxes payable upon the vesting of restricted stock. The number of shares that we may hold in treasury is limited under Swiss law. At September 30, 2012, 6.8 million shares remained available for repurchase under the authorization by the Board of Directors noted above. No shares were repurchased under this authorization during the nine months ended September 30, 2012.

Our Board of Directors may further increase Noble-Swiss’ share capital through the issuance of up to 133.1 million authorized registered shares without obtaining shareholder approval. The issuance of these authorized registered shares is subject to certain conditions regarding their use.

In April 2012, our shareholders approved the payment of a dividend aggregating $0.52 per share to be paid in four equal installments the first of which was paid in August 2012, with the remaining three installments to be paid in November 2012, February 2013 and May 2013, respectively. These dividends will require us to make cash payments of approximately $33 million during the fourth quarter of 2012, based on the number of shares currently outstanding. As of September 30, 2012, we had $100 million of dividends payable outstanding on this obligation. Any additional issuances of shares would further increase our obligation.

Earnings per share

The following table sets forth the computation of basic and diluted earnings per share for Noble-Swiss:

	Three months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
Allocation of net income
Basic
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Earnings allocated to unvested share-based payment awards		(1,192	)		(1,415	)		(4,008	)		(2,487	)
Net income to common shareholders—basic	$	113,582		$	133,902		$	390,759		$	241,408
Diluted
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Earnings allocated to unvested share-based payment awards		(1,190	)		(1,412	)		(4,002	)		(2,481	)
Net income to common shareholders—diluted	$	113,584		$	133,905		$	390,765		$	241,414
Weighted average shares outstanding—basic		252,657			251,580			252,339			251,327
Incremental shares issuable from assumed exercise of stock options		317			449			385			640
Weighted average shares outstanding—diluted		252,974			252,029			252,724			251,967
Weighted average unvested share-based payment awards		2,651			2,658			2,588			2,589
Earnings per share
Basic	$	0.45		$	0.53		$	1.55		$	0.96
Diluted	$	0.45		$	0.53		$	1.55		$	0.96

Only those items having a dilutive impact on our basic earnings per share are included in diluted earnings per share. At both September 30, 2012 and 2011, stock options totaling approximately 1.1 million were excluded from the diluted earnings per share as they were not dilutive.

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Accounting Pronouncements

9 Months Ended

Sep. 30, 2012

Accounting Pronouncements

Note 15 — Accounting Pronouncements

In May 2011, the FASB issued Accounting Standards Update (“ASU”) No. 2011-04, which amends FASB Accounting Standards Codification (“ASC”) Topic 820, “Fair Value Measurements and Disclosures.” This amended guidance clarifies the wording used to describe many of the requirements in accounting literature for measuring fair value and for disclosing information about fair value measurements. The goal of the amendment is to create consistency between the United States and international accounting standards. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

In June 2011, the FASB issued ASU No. 2011-05, which amends ASC Topic 220, “Comprehensive Income.” This ASU allows an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendment no longer allows an entity to show changes to other comprehensive income solely through the statement of equity. For publicly traded entities, the guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. In December 2011, the FASB issued ASU No. 2011-12, which defers only those changes in ASU 2011-05 that relate to the presentation of reclassification adjustments. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

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Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2012

Derivative Instruments and Hedging Activities

Note 11 — Derivative Instruments and Hedging Activities

We periodically enter into derivative instruments to manage our exposure to fluctuations in interest rates and foreign currency exchange rates. We have documented policies and procedures to monitor and control the use of derivative instruments. We do not engage in derivative transactions for speculative or trading purposes, nor are we a party to leveraged derivatives. During the nine months ended September 30, 2011, we maintained certain foreign currency forward contracts that did not qualify under the Financial Accounting Standards Board (“FASB”) standards for hedge accounting treatment and therefore, changes in fair values were recognized as either income or loss in our consolidated income statement.

For foreign currency forward contracts, hedge effectiveness is evaluated at inception based on the matching of critical terms between derivative contracts and the hedged item. For interest rate swaps, we evaluate all material terms between the swap and the underlying debt obligation, known in FASB standards as the “long-haul method.” Any change in fair value resulting from ineffectiveness is recognized immediately in earnings.

Cash Flow Hedges

Our North Sea and Brazil operations have a significant amount of their cash operating expenses payable in local currencies. To limit the potential risk of currency fluctuations, we have historically maintained short-term forward contracts settling monthly in their respective local currencies. At September 30, 2012, we had no outstanding derivative contracts.

The balance of the net unrealized gain/(loss) related to our cash flow hedges included in “Accumulated other comprehensive loss” (“AOCL”) and related activity is as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
Net unrealized gain/(loss) at beginning of period	$	—	$	4,117		$	(3,061	)	$	1,970
Activity during period:
Settlement of foreign currency forward contracts during the period		—		(2,054	)		3,061			(1,604	)
Settlement of interest rate swaps during the period		—		—			—			(366	)
Net unrealized loss on outstanding foreign currency forward contracts		—		(7,600	)		—			(5,537	)
Net unrealized gain/(loss) at end of period	$	—	$	(5,537	)	$	—		$	(5,537	)

Financial Statement Presentation

The following tables, together with Note 12, summarize the financial statement presentation and fair value of our derivative positions as of September 30, 2012 and December 31, 2011:

		Estimated fair value
	Balance sheet classification	September 30, 2012		December 31, 2011
Liability derivatives
Cash flow hedges
Short-term foreign currency forward contracts	Other current liabilities	$	—	$	3,061

To supplement the fair value disclosures in Note 12, the following summarizes the recognized gains and losses of cash flow hedges and non-designated derivatives through AOCL or through “other income” for the three months ended September 30, 2012 and 2011:

	Gain/(loss) recognized through AOCL					Gain/(loss) reclassified from AOCL to  “other income”					Gain/(loss) recognized through “other income”
	2012		2011			2012		2011			2012		2011
Cash flow hedges
Foreign currency forward contracts	$	—	$	(7,600	)	$	—	$	(2,054	)	$	—	$	—

To supplement the fair value disclosures in Note 12, the following summarizes the recognized gains and losses of cash flow hedges and non-designated derivatives through AOCL or through “other income” for the nine months ended September 30, 2012 and 2011:

	Gain/(loss) recognized through AOCL					Gain/(loss) reclassified from AOCL to  “other income”					Gain/(loss) recognized through “other income”
	2012		2011			2012		2011			2012		2011
Cash flow hedges
Foreign currency forward contracts	$	—	$	(5,537	)	$	3,061	$	(1,604	)	$	—	$	—
Interest rate swaps		—		—			—		(366	)		—		—
Non-designated derivatives
Foreign currency forward contracts	$	—	$	—		$	—	$	—		$	—	$	(546	)

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Receivables from Customers

9 Months Ended

Sep. 30, 2012

Receivables from Customers

Note 7 — Receivables from Customers

In June 2010, a subsidiary of Frontier, which we acquired in July 2010, entered into a charter contract with a subsidiary of BP PLC (“BP”) for the Seillean with a term of a minimum of 100 days. The unit went on hire on July 23, 2010. In October 2010, BP initiated an arbitration proceeding against us claiming the contract was void ab initio, or never existed, due to a fundamental breach and has made other claims and demanded that we reimburse the amounts already paid to us under the charter. We believe BP owes us the amounts due under the charter. The charter contained a “hell or high water” provision requiring payment, and we believe we satisfied our obligations under the charter. Outstanding receivables related to this charter totaled $35 million as of September 30, 2012. We recently received a favorable summary judgment ruling upholding the charter agreement and requiring BP to pay us the outstanding amounts, however, this matter has not been finally resolved because the ruling allows BP the opportunity to make a damages claim under the charter agreement. These receivables continue to be classified as long-term and are included in “Other assets” on our Consolidated Balance Sheet. We can make no assurances as to the outcome of this dispute.

At September 30, 2012, we had receivables of approximately $14 million related to the Noble Max Smith, which are being disputed by our customer, Pemex Exploracion y Produccion (“Pemex”). These receivables have been classified as long-term and are included in “Other assets” on our Consolidated Balance Sheet. The disputed amount relates to lost revenues for downtime that occurred after our rig was damaged when one of Pemex’s supply boats collided with our rig. In January 2012, we filed a lawsuit against Pemex in Mexican court seeking recovery of these amounts. While we can make no assurances as to the outcome of this dispute, we believe we are entitled to the disputed amounts.

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Summarized Financial Information of Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Operating Statistics [Line Items]
Revenues from external customers	$ 884,032	$ 737,902	$ 2,580,645	$ 1,944,787
Depreciation and amortization	195,087	166,213	549,779	487,454
Segment operating income	178,924	163,582	567,062	328,891
Interest expense, net of amount capitalized	(25,635)	(11,530)	(56,783)	(45,400)
Income tax (provision) / benefit	(25,162)	(17,614)	(93,107)	(42,481)
Segment profit / (loss)	114,774	135,317	394,767	243,895
Total assets (at end of period)	14,460,406	12,951,533	14,460,406	12,951,533	13,495,159
Noble-Cayman [Member]
Operating Statistics [Line Items]
Revenues from external customers	884,032	737,902	2,580,645	1,944,787
Depreciation and amortization	194,595	165,719	548,271	486,010
Segment operating income	195,687	182,896	610,663	375,384
Interest expense, net of amount capitalized	(25,635)	(11,530)	(56,783)	(45,400)
Income tax (provision) / benefit	(24,784)	(17,298)	(91,972)	(41,480)
Segment profit / (loss)	131,723	155,714	439,345	292,192
Total assets (at end of period)	14,423,510	12,911,798	14,423,510	12,911,798	13,457,405
Contract Drilling Services [Member]
Operating Statistics [Line Items]
Revenues from external customers	860,315	719,546	2,519,930	1,897,045
Depreciation and amortization	191,638	162,837	539,698	477,568
Segment operating income	173,285	159,588	559,713	321,613
Interest expense, net of amount capitalized	(121)	(122)	(315)	(1,890)
Income tax (provision) / benefit	(28,307)	(18,380)	(102,005)	(48,661)
Segment profit / (loss)	130,983	141,199	434,561	272,488
Total assets (at end of period)	13,983,223	12,472,018	13,983,223	12,472,018
Contract Drilling Services [Member] | Noble-Cayman [Member]
Operating Statistics [Line Items]
Revenues from external customers	860,315	719,546	2,519,930	1,897,045
Depreciation and amortization	191,638	162,837	539,698	477,568
Segment operating income	178,185	168,509	571,382	342,589
Interest expense, net of amount capitalized	(121)	(122)	(315)	(1,890)
Income tax (provision) / benefit	(28,307)	(18,380)	(102,005)	(48,661)
Segment profit / (loss)	135,883	150,120	446,230	293,464
Total assets (at end of period)	13,983,223	12,472,018	13,983,223	12,472,018
Other [Member]
Operating Statistics [Line Items]
Revenues from external customers	23,717	18,356	60,715	47,742
Depreciation and amortization	3,449	3,376	10,081	9,886
Segment operating income	5,639	3,994	7,349	7,278
Interest expense, net of amount capitalized	(25,514)	(11,408)	(56,468)	(43,510)
Income tax (provision) / benefit	3,145	766	8,898	6,180
Segment profit / (loss)	(16,209)	(5,882)	(39,794)	(28,593)
Total assets (at end of period)	477,183	479,515	477,183	479,515
Other [Member] | Noble-Cayman [Member]
Operating Statistics [Line Items]
Revenues from external customers	23,717	18,356	60,715	47,742
Depreciation and amortization	2,957	2,882	8,573	8,442
Segment operating income	17,502	14,387	39,281	32,795
Interest expense, net of amount capitalized	(25,514)	(11,408)	(56,468)	(43,510)
Income tax (provision) / benefit	3,523	1,082	10,033	7,181
Segment profit / (loss)	(4,160)	5,594	(6,885)	(1,272)
Total assets (at end of period)	$ 440,287	$ 439,780	$ 440,287	$ 439,780

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Loss on Impairment

9 Months Ended

Sep. 30, 2012

Loss on Impairment

Note 5 — Loss on Impairment

During the second quarter of 2012, we determined that our submersible rig fleet, consisting of two cold stacked rigs, was partially impaired due to the declining market outlook for drilling services for this rig type. We estimated the fair value of the rigs based on the salvage value of the rigs and a recent transaction involving a similar unit owned by a peer company (Level 2 fair value measurement). Based on these estimates, we recognized a charge of approximately $13 million for the nine months ended September 30, 2012.

Also, during the second quarter of 2012, we determined that certain corporate assets were partially impaired due to a declining market for, and the potential disposal of, the assets. We estimated the fair value of the asset based on recent transactions involving similar units in the market (Level 2 fair value measurement). Based on these estimates, we recognized a charge of approximately $5 million for the nine months ended September 30, 2012.

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Gain on Contract Settlements/Extinguishments, net

9 Months Ended

Sep. 30, 2012

Gain on Contract Settlements/Extinguishments, net

Note 6 — Gain on Contract Settlements/Extinguishments, net

During the second quarter of 2012, we received approximately $5 million from the settlement of a claim relating to the Noble David Tinsley, which had experienced a “punch-through” while being positioned on location in 2009. We had originally recorded a $17 million charge during 2009 related to this incident. Additionally, during the second quarter of 2012, we settled an action against certain vendors for damages sustained during Hurricane Ike. We recognized a net gain of approximately $28 million related to this settlement. We also resolved all outstanding matters with Anadarko Petroleum Company (“Anadarko”) related to the previously disclosed force majeure action, Hurricane Ike matters and receivables relating to the Noble Amos Runner.

In January 2011, we announced the signing of a Memorandum of Understanding (“MOU”) with Petroleo Brasileiro S.A. (“Petrobras”) regarding operations in Brazil. Under the terms of the MOU, we agreed to substitute the Noble Phoenix, then under contract with Shell in Southeast Asia, for the Noble Muravlenko. In connection with the cancellation of the contract on the Noble Phoenix, we recognized a non-cash gain of approximately $52.5 million during the first quarter of 2011, which represented the unamortized fair value of the in-place contract at acquisition. As a result of the substitution, we reached a decision not to proceed with the previously announced reliability upgrade to the Noble Muravlenko that was scheduled to take place in 2013, and therefore, incurred a non-cash charge of approximately $32.6 million related to the termination of outstanding shipyard contracts. The substitution was completed during the fourth quarter of 2012.

In February 2011, the outstanding balances of the Bully joint venture credit facilities, which totaled $693 million, were repaid in full and the credit facilities terminated using a portion of the proceeds from our February 2011 debt offering and equity contributions from our joint venture partner. In addition, the related interest rate swaps were settled and terminated concurrent with the repayment and termination of the credit facilities. As a result of these transactions, we recognized a gain of approximately $1.3 million during the first quarter of 2011.

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Debt

9 Months Ended

Sep. 30, 2012

Debt

Note 8 — Debt

Total debt consisted of the following at September 30, 2012 and December 31, 2011:

	September 30, 2012		December 31, 2011
Wholly-owned debt instruments:
5.875% Senior Notes due 2013	$	299,975	$	299,949
7.375% Senior Notes due 2014		249,760		249,647
3.45% Senior Notes due 2015		350,000		350,000
3.05% Senior Notes due 2016		299,948		299,938
2.50% Senior Notes due 2017		299,844		—
7.50% Senior Notes due 2019		201,695		201,695
4.90% Senior Notes due 2020		498,870		498,783
4.625% Senior Notes due 2021		399,515		399,480
3.95% Senior Notes due 2022		399,075		—
6.20% Senior Notes due 2040		399,891		399,890
6.05% Senior Notes due 2041		397,605		397,582
5.25% Senior Notes due 2042		498,251		—
Credit facilities		345,000		975,000
Total long-term debt	$	4,639,429	$	4,071,964

During June 2012, we replaced our $575 million credit facility scheduled to mature in 2013, with a new $1.2 billion credit facility, which matures in 2017. The new facility, combined with our existing $600 million credit facility that matures in 2015, gives us a total borrowing capacity under the two facilities (together referred to as the “Credit Facilities”) of $1.8 billion. The covenants and events of default under the Credit Facilities are substantially similar, and each facility contains a covenant that limits our ratio of debt to total tangible capitalization, as defined in the Credit Facilities, to 0.60. At September 30, 2012, our ratio of debt to total tangible capitalization was less than 0.36. We were in compliance with all covenants under the Credit Facilities as of September 30, 2012.

The Credit Facilities provide us with the ability to issue up to $375 million in letters of credit in the aggregate. The issuance of letters of credit does not increase our borrowings outstanding under the Credit Facilities, but it does reduce the amount available. At September 30, 2012, we had no letters of credit outstanding under the Credit Facilities.

During September 2012, we established a commercial paper program, which will allow us to issue up to $1.8 billion in unsecured commercial paper notes. Amounts issued under the commercial paper program are supported by the unused committed capacity under our Credit Facilities and, as such, are classified as long-term on our balance sheet. Subsequent to September 30, 2012, we began issuing notes under the program and had outstanding notes totaling $328 million as of October 31, 2012.

In February 2012, we issued, through our indirect wholly-owned subsidiary, Noble Holding International Limited (“NHIL”), $1.2 billion aggregate principal amount of senior notes in three separate tranches, with $300 million of 2.50% Senior Notes due 2017, $400 million of 3.95% Senior Notes due 2022, and $500 million of 5.25% Senior Notes due 2042. The weighted average coupon of all three tranches is 4.13%. The net proceeds of approximately $1.19 billion, after expenses, were primarily used to repay the then outstanding balance on our Credit Facilities.

Our 5.875% Senior Notes mature during the second quarter of 2013. We anticipate using availability under our Credit Facilities to repay the outstanding balance; therefore, we continue to report the balance as long-term at September 30, 2012.

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. In addition, there are restrictions on incurring or assuming certain liens and sale and lease-back transactions. At September 30, 2012, we were in compliance with all our debt covenants. We continually monitor compliance with the covenants under our Credit Facilities and senior notes and, based on our expectations for 2012, expect to remain in compliance during the year.

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 senior notes 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 following table presents the estimated fair value of our long-term debt as of September 30, 2012 and December 31, 2011.

	September 30, 2012				December 31, 2011
	Carrying		Estimated		Carrying		Estimated
	Value		Fair Value		Value		Fair Value
Wholly-owned debt instruments
5.875% Senior Notes due 2013	$	299,975	$	308,949	$	299,949	$	317,586
7.375% Senior Notes due 2014		249,760		272,063		249,647		278,966
3.45% Senior Notes due 2015		350,000		369,921		350,000		363,571
3.05% Senior Notes due 2016		299,948		314,142		299,938		306,057
2.50% Senior Notes due 2017		299,844		309,118		—		—
7.50% Senior Notes due 2019		201,695		249,768		201,695		248,623
4.90% Senior Notes due 2020		498,870		559,783		498,783		531,437
4.625% Senior Notes due 2021		399,515		440,799		399,480		416,847
3.95% Senior Notes due 2022		399,075		420,137		—		—
6.20% Senior Notes due 2040		399,891		466,331		399,890		450,017
6.05% Senior Notes due 2041		397,605		461,733		397,582		443,308
5.25% Senior Notes due 2042		498,251		533,637		—		—
Credit Facilities		345,000		345,000		975,000		975,000
Total long-term debt	$	4,639,429	$	5,051,381	$	4,071,964	$	4,331,412

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Guarantees of Registered Securities (Condensed Consolidating Statement of Income) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating revenues
Contract drilling services	$ 833,212	$ 704,892	$ 2,427,759	$ 1,837,047
Reimbursables	28,137	17,438	94,090	63,851
Labor contract drilling services	22,667	15,564	58,538	43,123
Other	16	8	258	766
Total operating revenues	884,032	737,902	2,580,645	1,944,787
Operating costs and expenses
Contract drilling services	449,125	358,547	1,292,638	1,001,638
Reimbursables	21,047	13,971	76,618	49,797
Labor contract drilling services	12,991	8,053	34,070	25,326
Depreciation and amortization	195,087	166,213	549,779	487,454
Selling, general and administrative	26,858	27,536	75,388	72,883
Loss on impairment			18,345
Gain on contract extinguishments, net			(33,255)	(21,202)
Total operating costs and expenses	705,108	574,320	2,013,583	1,615,896
Operating income (loss)	178,924	163,582	567,062	328,891
Other income (expense)
Interest expense, net of amounts capitalized	(25,635)	(11,530)	(56,783)	(45,400)
Interest income and other, net	1,553	1,117	4,526	3,175
Income before income taxes	154,842	153,169	514,805	286,666
Income tax (provision) / benefit	(25,162)	(17,614)	(93,107)	(42,481)
Net income	129,680	135,555	421,698	244,185
Net income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Net income attributable to Noble Corporation	114,774	135,317	394,767	243,895
Other comprehensive income (loss), net	3,384	(13,896)	2,244	(5,992)
Comprehensive income attributable to Noble Corporation	118,158	121,421	397,011	237,903
Noble-Cayman [Member]
Operating revenues
Contract drilling services
Reimbursables
Labor contract drilling services
Other
Total operating revenues
Operating costs and expenses
Contract drilling services	1,355	1,759	3,794	4,818
Reimbursables
Labor contract drilling services
Depreciation and amortization
Selling, general and administrative	426	2,094	1,237	5,397
Loss on impairment
Gain on contract extinguishments, net
Total operating costs and expenses	1,781	3,853	5,031	10,215
Operating income (loss)	(1,781)	(3,853)	(5,031)	(10,215)
Other income (expense)
Equity earnings in affiliates, net of tax	162,311	174,673	515,132	350,439
Interest expense, net of amounts capitalized	(30,496)	(16,721)	(76,396)	(52,985)
Interest income and other, net	1,689	1,615	5,640	4,953
Income before income taxes	131,723	155,714	439,345	292,192
Income tax (provision) / benefit
Net income	131,723	155,714	439,345	292,192
Net income attributable to noncontrolling interests
Net income attributable to Noble Corporation	131,723	155,714	439,345	292,192
Other comprehensive income (loss), net	3,384	(13,896)	2,244	(5,992)
Comprehensive income attributable to Noble Corporation	135,107	141,818	441,589	286,200
NHC and NDH Combined [Member]
Operating revenues
Contract drilling services	36,149	38,955	117,488	100,009
Reimbursables	389	691	6,199	3,381
Labor contract drilling services		4		4
Other
Total operating revenues	36,538	39,650	123,687	103,394
Operating costs and expenses
Contract drilling services	13,948	10,485	42,642	31,554
Reimbursables	216	420	5,641	3,331
Labor contract drilling services
Depreciation and amortization	15,500	13,138	45,577	36,330
Selling, general and administrative	1,447	1,488	4,258	4,206
Loss on impairment
Gain on contract extinguishments, net			(4,869)
Total operating costs and expenses	31,111	25,531	93,249	75,421
Operating income (loss)	5,427	14,119	30,438	27,973
Other income (expense)
Equity earnings in affiliates, net of tax	69,069	226,079	358,234	328,452
Interest expense, net of amounts capitalized	(8,964)	(15,612)	(37,881)	(45,527)
Interest income and other, net	11,080	6,906	29,771	19,376
Income before income taxes	76,612	231,492	380,562	330,274
Income tax (provision) / benefit	(8,639)	487	(30,902)	6,287
Net income	67,973	231,979	349,660	336,561
Net income attributable to noncontrolling interests
Net income attributable to Noble Corporation	67,973	231,979	349,660	336,561
Other comprehensive income (loss), net
Comprehensive income attributable to Noble Corporation	67,973	231,979	349,660	336,561
NDC [Member]
Operating revenues
Contract drilling services	5,061	5,105	14,941	14,800
Reimbursables				12
Labor contract drilling services
Other
Total operating revenues	5,061	5,105	14,941	14,812
Operating costs and expenses
Contract drilling services	1,919	1,883	5,529	5,681
Reimbursables
Labor contract drilling services
Depreciation and amortization	1,181	937	3,278	2,781
Selling, general and administrative
Loss on impairment
Gain on contract extinguishments, net
Total operating costs and expenses	3,100	2,820	8,807	8,462
Operating income (loss)	1,961	2,285	6,134	6,350
Other income (expense)
Equity earnings in affiliates, net of tax	36,463	45,818	92,343	80,795
Interest expense, net of amounts capitalized	(852)	(1,285)	(3,040)	(4,824)
Interest income and other, net	9	(40)	4	8
Income before income taxes	37,581	46,778	95,441	82,329
Income tax (provision) / benefit
Net income	37,581	46,778	95,441	82,329
Net income attributable to noncontrolling interests
Net income attributable to Noble Corporation	37,581	46,778	95,441	82,329
Other comprehensive income (loss), net
Comprehensive income attributable to Noble Corporation	37,581	46,778	95,441	82,329
NHIL [Member]
Operating revenues
Contract drilling services
Reimbursables
Labor contract drilling services
Other
Total operating revenues
Operating costs and expenses
Contract drilling services	19,636	9,819	56,048	26,625
Reimbursables
Labor contract drilling services
Depreciation and amortization
Selling, general and administrative	9,700	9,253	28,137	24,756
Loss on impairment
Gain on contract extinguishments, net
Total operating costs and expenses	29,336	19,072	84,185	51,381
Operating income (loss)	(29,336)	(19,072)	(84,185)	(51,381)
Other income (expense)
Equity earnings in affiliates, net of tax	172,364	172,153	583,122	344,524
Interest expense, net of amounts capitalized	(33,509)	(21,641)	(83,975)	(67,667)
Interest income and other, net	37,430	15,813	99,609	38,557
Income before income taxes	146,949	147,253	514,571	264,033
Income tax (provision) / benefit
Net income	146,949	147,253	514,571	264,033
Net income attributable to noncontrolling interests
Net income attributable to Noble Corporation	146,949	147,253	514,571	264,033
Other comprehensive income (loss), net
Comprehensive income attributable to Noble Corporation	146,949	147,253	514,571	264,033
NDS6 [Member]
Operating revenues
Contract drilling services
Reimbursables
Labor contract drilling services
Other
Total operating revenues
Operating costs and expenses
Contract drilling services
Reimbursables
Labor contract drilling services
Depreciation and amortization
Selling, general and administrative	1		1	1
Loss on impairment
Gain on contract extinguishments, net
Total operating costs and expenses	1		1	1
Operating income (loss)	(1)		(1)	(1)
Other income (expense)
Equity earnings in affiliates, net of tax	129,161	(20,624)	274,564	86,932
Interest expense, net of amounts capitalized	(11,832)	(7,106)	(31,020)	(22,048)
Interest income and other, net	2,846	2,277	8,771	6,321
Income before income taxes	120,174	(25,453)	252,314	71,204
Income tax (provision) / benefit
Net income	120,174	(25,453)	252,314	71,204
Net income attributable to noncontrolling interests
Net income attributable to Noble Corporation	120,174	(25,453)	252,314	71,204
Other comprehensive income (loss), net
Comprehensive income attributable to Noble Corporation	120,174	(25,453)	252,314	71,204
Other Non-guarantor Subsidiaries of Noble [Member]
Operating revenues
Contract drilling services	809,858	680,617	2,352,618	1,770,356
Reimbursables	27,748	16,747	87,891	60,458
Labor contract drilling services	22,667	15,560	58,538	43,119
Other	16	8	1,190	766
Total operating revenues	860,289	712,932	2,500,237	1,874,699
Operating costs and expenses
Contract drilling services	425,223	345,465	1,231,176	960,102
Reimbursables	20,831	13,551	70,977	46,466
Labor contract drilling services	12,991	8,053	34,070	25,326
Depreciation and amortization	177,914	151,644	499,416	446,899
Selling, general and administrative	3,913	4,802	11,331	14,450
Loss on impairment			18,345
Gain on contract extinguishments, net			(28,386)	(21,202)
Total operating costs and expenses	640,872	523,515	1,836,929	1,472,041
Operating income (loss)	219,417	189,417	663,308	402,658
Other income (expense)
Equity earnings in affiliates, net of tax
Interest expense, net of amounts capitalized	(20,221)	(267)	(60,193)	(3,284)
Interest income and other, net	28,546	26,415	96,295	85,698
Income before income taxes	227,742	215,565	699,410	485,072
Income tax (provision) / benefit	(16,145)	(17,785)	(61,070)	(47,767)
Net income	211,597	197,780	638,340	437,305
Net income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Net income attributable to Noble Corporation	196,691	197,542	611,409	437,015
Other comprehensive income (loss), net	3,384	(13,896)	2,244	(5,992)
Comprehensive income attributable to Noble Corporation	200,075	183,646	613,653	431,023
Consolidating Adjustments [Member]
Operating revenues
Contract drilling services	(17,856)	(19,785)	(57,288)	(48,118)
Reimbursables
Labor contract drilling services
Other			(932)
Total operating revenues	(17,856)	(19,785)	(58,220)	(48,118)
Operating costs and expenses
Contract drilling services	(17,856)	(19,785)	(58,220)	(48,118)
Reimbursables
Labor contract drilling services
Depreciation and amortization
Selling, general and administrative
Loss on impairment
Gain on contract extinguishments, net
Total operating costs and expenses	(17,856)	(19,785)	(58,220)	(48,118)
Operating income (loss)
Other income (expense)
Equity earnings in affiliates, net of tax	(569,368)	(598,099)	(1,823,395)	(1,191,142)
Interest expense, net of amounts capitalized	80,239	51,102	235,722	150,935
Interest income and other, net	(80,239)	(51,102)	(235,722)	(150,935)
Income before income taxes	(569,368)	(598,099)	(1,823,395)	(1,191,142)
Income tax (provision) / benefit
Net income	(569,368)	(598,099)	(1,823,395)	(1,191,142)
Net income attributable to noncontrolling interests
Net income attributable to Noble Corporation	(569,368)	(598,099)	(1,823,395)	(1,191,142)
Other comprehensive income (loss), net	(3,384)	13,896	(2,244)	5,992
Comprehensive income attributable to Noble Corporation	(572,752)	(584,203)	(1,825,639)	(1,185,150)
Noble-Cayman [Member]
Operating revenues
Contract drilling services	833,212	704,892	2,427,759	1,837,047
Reimbursables	28,137	17,438	94,090	63,851
Labor contract drilling services	22,667	15,564	58,538	43,123
Other	16	8	258	766
Total operating revenues	884,032	737,902	2,580,645	1,944,787
Operating costs and expenses
Contract drilling services	444,225	349,626	1,280,969	980,662
Reimbursables	21,047	13,971	76,618	49,797
Labor contract drilling services	12,991	8,053	34,070	25,326
Depreciation and amortization	194,595	165,719	548,271	486,010
Selling, general and administrative	15,487	17,637	44,964	48,810
Loss on impairment			18,345
Gain on contract extinguishments, net			(33,255)	(21,202)
Total operating costs and expenses	688,345	555,006	1,969,982	1,569,403
Operating income (loss)	195,687	182,896	610,663	375,384
Other income (expense)
Equity earnings in affiliates, net of tax
Interest expense, net of amounts capitalized	(25,635)	(11,530)	(56,783)	(45,400)
Interest income and other, net	1,361	1,884	4,368	3,978
Income before income taxes	171,413	173,250	558,248	333,962
Income tax (provision) / benefit	(24,784)	(17,298)	(91,972)	(41,480)
Net income	146,629	155,952	466,276	292,482
Net income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Net income attributable to Noble Corporation	131,723	155,714	439,345	292,192
Other comprehensive income (loss), net	3,384	(13,896)	2,244	(5,992)
Comprehensive income attributable to Noble Corporation	$ 135,107	$ 141,818	$ 441,589	$ 286,200

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Guarantees of Registered Securities (Condensed Consolidating Balance Sheet) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 218,467	$ 239,196	$ 197,015	$ 337,871
Accounts receivable	791,408	587,163
Taxes receivable	118,540	75,284
Prepaid expenses	64,644	35,796
Other current assets	111,433	122,173
Total current assets	1,304,492	1,059,612
Property and equipment, at cost	16,637,626	15,540,178
Accumulated depreciation	(3,825,482)	(3,409,833)
Property and equipment, net	12,812,144	12,130,345
Other assets	343,770	305,202
Total assets	14,460,406	13,495,159	12,951,533
Current liabilities
Accounts payable	298,363	436,006
Accrued payroll and related costs	145,595	117,907
Interest payable	23,851	54,419
Taxes payable	130,551	94,920
Other current liabilities	144,267	123,928
Total current liabilities	842,209	827,180
Long-term debt	4,639,429	4,071,964
Deferred income taxes	235,851	242,791
Other liabilities	353,595	255,372
Total liabilities	6,071,084	5,397,307
Commitments and contingencies
Total shareholder equity	7,631,060	7,406,521
Noncontrolling interest	758,262	691,331
Total equity	8,389,322	8,097,852	7,971,669	7,287,634
Total liabilities and equity	14,460,406	13,495,159
Noble-Cayman [Member]
Current assets
Cash and cash equivalents	0	146	0	42
Accounts receivable from affiliates	852,466	1,683,740
Other current assets	375
Total current assets	852,841	1,683,886
Property and equipment, net	0	0
Notes receivable from affiliates	3,816,463	3,842,062
Investments in affiliates	7,484,253	6,969,201
Other assets	6,296	3,230
Total assets	12,159,853	12,498,379
Current liabilities
Short-term notes payables from affiliates	90,314	72,298
Accounts payable to affiliates	848,091	2,079,719
Interest payable	6,093	1,891
Total current liabilities	944,498	2,153,908
Long-term debt	644,975	1,274,949
Notes payable to affiliates	2,840,287	1,667,291
Other liabilities	19,929	19,929
Total liabilities	4,449,689	5,116,077
Commitments and contingencies
Total shareholder equity	7,710,164	7,382,302
Total equity	7,710,164	7,382,302
Total liabilities and equity	12,159,853	12,498,379
NHC and NDH Combined [Member]
Current assets
Cash and cash equivalents	435	385	292	146
Accounts receivable	10,560	10,810
Taxes receivable	25,502	4,566
Prepaid expenses	444	453
Short-term notes receivable from affiliates	119,476	119,476
Accounts receivable from affiliates	153,146	99,202
Other current assets	640	643
Total current assets	310,203	235,535
Property and equipment, at cost	2,616,145	2,737,764
Accumulated depreciation	(300,637)	(232,621)
Property and equipment, net	2,315,508	2,505,143
Notes receivable from affiliates	1,206,000	675,000
Investments in affiliates	9,078,691	9,101,938
Other assets	535	473
Total assets	12,910,937	12,518,089
Current liabilities
Short-term notes payables from affiliates	51,054	50,000
Accounts payable	2,720	5,577
Accrued payroll and related costs	5,478	2,897
Accounts payable to affiliates	4,628,552	4,166,021
Taxes payable	9,007	10,032
Total current liabilities	4,696,811	4,234,527
Notes payable to affiliates	648,475	1,147,500
Other liabilities	17,475	24,878
Total liabilities	5,362,761	5,406,905
Commitments and contingencies
Total shareholder equity	7,548,176	7,111,184
Total equity	7,548,176	7,111,184
Total liabilities and equity	12,910,937	12,518,089
NDC [Member]
Current assets
Cash and cash equivalents	0		0
Accounts receivable	1,584	3,371
Prepaid expenses	20	19
Accounts receivable from affiliates	970,918	879,581
Other current assets	196	196
Total current assets	972,718	883,167
Property and equipment, at cost	75,591	75,001
Accumulated depreciation	(57,520)	(54,599)
Property and equipment, net	18,071	20,402
Investments in affiliates	3,412,070	3,450,212
Other assets	654	483
Total assets	4,403,513	4,354,264
Current liabilities
Short-term notes payables from affiliates	110,770
Accounts payable	644	985
Accrued payroll and related costs	7,857	6,518
Accounts payable to affiliates	4,593	27,341
Other current liabilities	240	240
Total current liabilities	124,104	35,084
Notes payable to affiliates		85,000
Deferred income taxes	15,731	15,731
Total liabilities	139,835	135,815
Commitments and contingencies
Total shareholder equity	4,263,678	4,218,449
Total equity	4,263,678	4,218,449
Total liabilities and equity	4,403,513	4,354,264
NHIL [Member]
Current assets
Cash and cash equivalents	19		0
Accounts receivable from affiliates	502,287	159,132
Other current assets		93
Total current assets	502,306	159,225
Property and equipment, net	0	0
Notes receivable from affiliates	3,524,814	2,336,527
Investments in affiliates	7,188,893	6,605,771
Other assets	26,740	18,548
Total assets	11,242,753	9,120,071
Current liabilities
Accounts payable to affiliates	152,009	112,953
Interest payable	17,128	48,116
Total current liabilities	169,137	161,069
Long-term debt	3,792,759	2,595,320
Notes payable to affiliates	975,000	975,000
Total liabilities	4,936,896	3,731,389
Commitments and contingencies
Total shareholder equity	6,305,857	5,388,682
Total equity	6,305,857	5,388,682
Total liabilities and equity	11,242,753	9,120,071
NDS6 [Member]
Current assets
Cash and cash equivalents	0		0
Accounts receivable from affiliates	42,675	33,905
Total current assets	42,675	33,905
Property and equipment, net	0	0
Notes receivable from affiliates	479,107	572,107
Investments in affiliates	2,348,479	2,141,450
Other assets	790	880
Total assets	2,871,051	2,748,342
Current liabilities
Accounts payable to affiliates	68,819	34,107
Interest payable	630	4,412
Total current liabilities	69,449	38,519
Long-term debt	201,695	201,695
Notes payable to affiliates	1,342,000	811,000
Total liabilities	1,613,144	1,051,214
Commitments and contingencies
Total shareholder equity	1,257,907	1,697,128
Total equity	1,257,907	1,697,128
Total liabilities and equity	2,871,051	2,748,342
Other Non-guarantor Subsidiaries of Noble [Member]
Current assets
Cash and cash equivalents	213,227	234,525	191,713	333,211
Accounts receivable	779,264	572,982
Taxes receivable	92,852	70,718
Prepaid expenses	61,072	32,633
Short-term notes receivable from affiliates	252,138	122,298
Accounts receivable from affiliates	5,570,469	6,372,657
Other current assets	110,222	119,177
Total current assets	7,079,244	7,524,990
Property and equipment, at cost	13,910,239	12,693,229
Accumulated depreciation	(3,460,572)	(3,117,369)
Property and equipment, net	10,449,667	9,575,860
Notes receivable from affiliates	2,171,875	2,678,192
Other assets	308,837	281,669
Total assets	20,009,623	20,060,711
Current liabilities
Short-term notes payables from affiliates	119,476	119,476
Accounts payable	294,605	429,167
Accrued payroll and related costs	120,675	99,493
Accounts payable to affiliates	2,389,897	2,808,076
Taxes payable	117,105	81,158
Other current liabilities	144,027	123,159
Total current liabilities	3,185,785	3,660,529
Notes payable to affiliates	5,392,497	5,418,097
Deferred income taxes	220,120	227,060
Other liabilities	316,191	210,565
Total liabilities	9,114,593	9,516,251
Commitments and contingencies
Total shareholder equity	10,136,768	9,853,129
Noncontrolling interest	758,262	691,331
Total equity	10,895,030	10,544,460
Total liabilities and equity	20,009,623	20,060,711
Consolidating Adjustments [Member]
Current assets
Cash and cash equivalents	0		0
Short-term notes receivable from affiliates	(371,614)	(241,774)
Accounts receivable from affiliates	(8,091,961)	(9,228,217)
Total current assets	(8,463,575)	(9,469,991)
Property and equipment, net	0	0
Notes receivable from affiliates	(11,198,259)	(10,103,888)
Investments in affiliates	(29,512,386)	(28,268,572)
Total assets	(49,174,220)	(47,842,451)
Current liabilities
Short-term notes payables from affiliates	(371,614)	(241,774)
Accounts payable to affiliates	(8,091,961)	(9,228,217)
Total current liabilities	(8,463,575)	(9,469,991)
Notes payable to affiliates	(11,198,259)	(10,103,888)
Total liabilities	(19,661,834)	(19,573,879)
Commitments and contingencies
Total shareholder equity	(29,512,386)	(28,268,572)
Total equity	(29,512,386)	(28,268,572)
Total liabilities and equity	(49,174,220)	(47,842,451)
Noble-Cayman [Member]
Current assets
Cash and cash equivalents	213,681	235,056	192,005	333,399
Accounts receivable	791,408	587,163
Taxes receivable	118,354	75,284
Prepaid expenses	61,536	33,105
Other current assets	111,433	120,109
Total current assets	1,296,412	1,050,717
Property and equipment, at cost	16,601,975	15,505,994
Accumulated depreciation	(3,818,729)	(3,404,589)
Property and equipment, net	12,783,246	12,101,405
Other assets	343,852	305,283
Total assets	14,423,510	13,457,405	12,911,798
Current liabilities
Accounts payable	297,969	435,729
Accrued payroll and related costs	134,010	108,908
Interest payable	23,851	54,419
Taxes payable	126,112	91,190
Other current liabilities	144,267	123,399
Total current liabilities	726,209	813,645
Long-term debt	4,639,429	4,071,964
Deferred income taxes	235,851	242,791
Other liabilities	353,595	255,372
Total liabilities	5,955,084	5,383,772
Commitments and contingencies
Total shareholder equity	7,710,164	7,382,302
Noncontrolling interest	758,262	691,331
Total equity	8,468,426	8,073,633	7,947,360	7,260,655
Total liabilities and equity	$ 14,423,510	$ 13,457,405

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Net Change in Other Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2012

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-Swiss						Noble-Cayman
	Nine months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
Accounts receivable	$	(163,051	)	$	(213,747	)	$	(163,051	)	$	(213,747	)
Other current assets		(58,303	)		(23,900	)		(59,764	)		(20,578	)
Other assets		(25,543	)		(37,171	)		(25,546	)		(39,649	)
Accounts payable		29,470			(23,744	)		29,353			(23,654	)
Other current liabilities		76,035			21,281			79,436			13,655
Other liabilities		70,382			33,566			64,215			33,540
	$	(71,010	)	$	(243,715	)	$	(75,357	)	$	(250,433	)

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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Reserves for uncertain tax positions net	$ 124	$ 118
Related tax benefits	10	8
Reduction in the provision for income taxes, if reserves not realized	$ 124
Operational period	12 months

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies

Note 13 — Commitments and Contingencies

The Noble Homer Ferrington was under contract with a subsidiary of ExxonMobil Corporation (“ExxonMobil”), which entered into an assignment agreement with BP for a two-well farmout of the rig in Libya after successfully drilling two wells with the rig for ExxonMobil. In August 2010, BP attempted to terminate the assignment agreement claiming that the rig was not in the required condition, and ExxonMobil informed us that we must look to BP for payment of the dayrate during the assignment period. In August 2010, we initiated arbitration proceedings under the drilling contract against both BP and ExxonMobil. We do not believe BP had the right to terminate the assignment agreement and believe the rig was ready to operate under the drilling contract. The rig operated under farmout arrangements from March 2011 to the conclusion of the contract in the second quarter of 2012. We believe we are owed dayrate by either or both of these clients. The operating dayrate was approximately $538,000 per day for the work in Libya. The arbitration process is proceeding, and we intend to vigorously pursue these claims. As a result of the uncertainties noted above, we have not recognized any revenue during the assignment period and the matter could have a material positive effect on our results of operations or cash flows in the period the matter is resolved should the arbitration panel ultimately rule in our favor.

In August 2007, we entered into a drilling contract with Marathon Oil Company (“Marathon”) for the Noble Jim Day to operate in the U.S. Gulf of Mexico. On January 1, 2011, Marathon provided notice that it was terminating the contract. Marathon’s stated reason for the termination was that the rig had not been accepted by Marathon by December 31, 2010, and Marathon also maintained that a force majeure condition existed under the contract. The contract contained a provision allowing Marathon to terminate if the rig had not commenced operations by December 31, 2010. We believe the rig was ready to commence operations and should have been accepted by Marathon. The contract term was for four years. No revenue has been recognized under this contract. We have contracted the rig for much of the original term with other customers. In March 2011, we filed suit in Texas State District Court against Marathon seeking damages for its actions. The suit is proceeding and is currently in the discovery phase. We cannot provide assurance as to the outcome of this lawsuit.

We are from time to time a party to various lawsuits that are incidental to our operations in which the claimants seek an unspecified amount of monetary damages for personal injury, including injuries purportedly resulting from exposure to asbestos on drilling rigs and associated facilities. At September 30, 2012, there were 29 asbestos related lawsuits in which we are one of many defendants. These lawsuits have been filed in the United States in the states of Louisiana, Mississippi and Texas. We intend to vigorously defend against the litigation. We do not believe the ultimate resolution of these matters will have a material adverse effect on our financial position, results of operations or cash flows.

We are a defendant in certain claims and litigation arising out of operations in the ordinary course of business, including certain disputes with customers over receivables discussed in Note 7, 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.

We operate in a number of countries throughout the world and our income tax returns filed in those jurisdictions are subject to review and examination by tax authorities within those jurisdictions. The U.S. Internal Revenue Service (“IRS”) has completed its audit examination of our 2008 U.S. tax return and proposed adjustments and deficiencies with respect to certain items that were reported by us for the 2008 tax year. We believe that we have accurately reported all amounts in our 2008 tax return, and have filed protests with the IRS Office of Appeals contesting the examination team’s proposed adjustments. A conference has been scheduled in December 2012 to discuss these items. We intend to vigorously defend our reported positions. Our 2009 tax return is under audit, and we expect to receive additional Information Document Requests in the coming months. During the third quarter, a U.S. subsidiary of Frontier concluded its audit with the IRS for its 2007 and 2008 tax returns, resulting in no change to income tax expense. Furthermore, we are currently contesting several non-U.S. tax assessments and may contest future assessments when we disagree with those assessments based on the technical merits of the positions established at the time of the filing of the tax return. We believe the ultimate resolution of the outstanding assessments, for which we have not made any accrual, will not have a material adverse effect on our consolidated financial statements. 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 the existing or future assessments.

Our Mexican income tax returns have been examined for the 2002 through 2007 periods and audit claims have been assessed for approximately $326 million (including interest and penalties). During 2011, we received from the Regional Chamber of the Federal Tax Court adverse decisions with respect to approximately $6 million in assessments related to depreciation deductions, which we are appealing. We are also contesting all other assessments in Mexico. Tax authorities in Mexico and other jurisdictions may issue additional assessments or pursue legal actions as a result of tax audits and we cannot predict or provide assurance as to the ultimate outcome of such assessments and legal actions.

Additional audit claims of approximately $91 million attributable to income, customs and other business taxes have been assessed against us in other jurisdictions. We have contested, or intend to contest, these assessments, including through litigation if necessary, and we believe the ultimate resolution, for which we have not made any accrual, will not have a material adverse effect on our consolidated financial statements.

We maintain certain insurance coverage against specified marine perils which includes physical damage and loss of hire. Damage caused by hurricanes has negatively impacted the energy insurance market, resulting in more restrictive and expensive coverage for U.S. named windstorm perils. Accordingly, we have elected to significantly reduce the named windstorm insurance on our rigs operating in the U.S. Gulf of Mexico. Presently we insure the Noble Jim Thompson, Noble Amos Runner and Noble Driller for “total loss only” when caused by a named windstorm. Our customer assumes the risk of loss on the Noble Bully I due to a named windstorm event up to $450 million per occurrence pursuant to the terms of the drilling contract relating to such vessel, provided that we are responsible for the first $25 million per occurrence for such named windstorm events. The remaining rigs in the U.S. Gulf of Mexico are self-insured for named windstorm perils. Our rigs located in the Mexico portion of the Gulf of Mexico remain covered by commercial insurance for windstorm damage. In addition, we maintain physical damage deductibles on our rigs ranging from $15 million to $25 million per occurrence, depending on location. The loss of hire coverage applies only to our rigs operating under contract with a dayrate equal to or greater than $200,000 a day and is subject to a 45-day waiting period for each unit and each occurrence.

Although we maintain insurance in the geographic areas in which we operate, pollution, reservoir damage and environmental risks generally are not fully insurable. Our insurance policies and contractual rights to indemnity may not adequately cover our losses or may have exclusions of coverage for some losses. We do not have insurance coverage or rights to indemnity for all risks, including loss of hire insurance on most of the rigs in our fleet. Uninsured exposures may include expatriate activities prohibited by U.S. laws and regulations, radiation hazards, certain loss or damage to property on board our rigs and losses relating to shore-based terrorist acts or strikes. If a significant accident or other event occurs and is not fully covered by insurance or contractual indemnity, it could materially adversely affect our financial position, results of operations or cash flows. Additionally, there can be no assurance that those parties with contractual obligations to indemnify us will necessarily be financially able to indemnify us against all these risks.

In January 2012, we were assessed a fine by the Brazilian government in the amount of R$1.8 million (approximately $887,000) in connection with the inadvertent discharge of drilling fluid from one of our rigs offshore Brazil in September 2011. We have accepted the assessment.

In October 2011, we were assessed a fine by the Brazilian government in the amount of R$238,000 (approximately $117,000) in connection with the inadvertent discharge of drilling fluid from one of our rigs offshore Brazil in November 2010. We have accepted the assessment.

We carry protection and indemnity insurance covering marine third party liability exposures, which also includes coverage for employer’s liability resulting from personal injury to our offshore drilling crews. Our protection and indemnity policy currently has a standard deductible of $10 million per occurrence, with maximum liability coverage of $750 million.

In connection with our capital expenditure program, we had outstanding commitments, including shipyard and purchase commitments of approximately $3.0 billion at September 30, 2012.

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-Swiss (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.

Nigerian Operations

During the fourth quarter of 2007, our Nigerian subsidiary received letters from the Nigerian Maritime Administration and Safety Agency (“NIMASA”) seeking to collect a 2 percent surcharge on contract amounts under contracts performed by “vessels,” within the meaning of Nigeria’s cabotage laws, engaged in the Nigerian coastal shipping trade. Although we do not believe that these laws apply to our ownership of drilling units, NIMASA is seeking to apply a provision of the Nigerian cabotage laws (which became effective on May 1, 2004) to our offshore drilling units by considering these units to be “vessels” within the meaning of those laws and therefore subject to the surcharge, which is imposed only upon “vessels.” Our offshore drilling units are not engaged in the Nigerian coastal shipping trade and are not in our view “vessels” within the meaning of Nigeria’s cabotage laws. In January 2008, we filed an originating summons against NIMASA and the Minister of Transportation in the Federal High Court of Lagos, Nigeria seeking, among other things, a declaration that our drilling operations do not constitute “coastal trade” or “cabotage” within the meaning of Nigeria’s cabotage laws and that our offshore drilling units are not “vessels” within the meaning of those laws. In February 2009, NIMASA filed suit against us in the Federal High Court of Nigeria seeking collection of the cabotage surcharge. In August 2009, the court issued a favorable ruling in response to our originating summons stating that drilling operations do not fall within the cabotage laws and that drilling rigs are not vessels for purposes of those laws. The court also issued an injunction against the defendants prohibiting their interference with our drilling rigs or drilling operations. NIMASA has appealed the court’s ruling, although the court dismissed NIMASA’s lawsuit filed against us in February 2009. We intend to take all further appropriate legal action to resist the application of Nigeria’s cabotage laws to our drilling units. The outcome of any such legal action and the extent to which we may ultimately be responsible for the surcharge is uncertain. If it is ultimately determined that offshore drilling units constitute vessels within the meaning of the Nigerian cabotage laws, we may be required to pay the surcharge and comply with other aspects of the Nigerian cabotage laws, which could adversely affect our operations in Nigerian waters and require us to incur additional costs of compliance.

NIMASA had previously informed the Nigerian Content Division of its position that we were not in compliance with the cabotage laws. The Nigerian Content Division makes determinations of companies’ compliance with applicable local content regulations for purposes of government contracting, including contracting for services in connection with oil and gas concessions where the Nigerian national oil company is a partner. The Nigerian Content Division had previously barred us from participating in new tenders as a result of NIMASA’s allegations, although the Division reversed its actions based on the favorable Federal High Court ruling. However, no assurance can be given with respect to our ability to bid for future work in Nigeria until our dispute with NIMASA is resolved.

As previously disclosed, in November 2010 we finalized settlements with the SEC and the Department of Justice as the result of an internal investigation of the legality under the United States Foreign Corrupt Practices Act (“FCPA”) and local laws of certain reimbursement payments made by our Nigerian affiliate to our customs agents in Nigeria. In January 2011, a subsidiary of Noble-Swiss resolved an investigation by the Nigerian Economic and Financial Crimes Commission and the Nigerian Attorney General Office into these same activities. Any additional investigation by these or other agencies could damage our reputation and result in substantial fines, sanctions, civil and/or criminal penalties and curtailment of operations in certain jurisdictions and might adversely affect our business, results of operations or financial condition. Further, resolving any additional investigations could be expensive and consume significant time and attention of our senior management.

Under the Nigerian Industrial Training Fund Act of 2004, as amended, (the “Act”), Nigerian companies with five or more employees must contribute annually one percent of their payroll to the Industrial Training Fund (“ITF”) established under the Act to be used for the training of Nigerian nationals with a view towards generating a pool of indigenously trained manpower. We have not paid this amount on our expatriate workers employed by our non-Nigerian employment entity in the past as we did not believe the contribution obligation was applicable to them. In October 2012, we received a demand from the ITF for payments going back to 2004 and associated penalties in respect of these expatriate employees. We do not believe that we owe the amount claimed and that, in the event we were to have any liability, it would be for an immaterial amount. We continue to investigate the matter and are also engaged in discussions with the ITF to resolve the issue.

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Accounting Pronouncements (Policies)

9 Months Ended

Sep. 30, 2012

Fair Value Measurements and Disclosures

In May 2011, the FASB issued Accounting Standards Update (“ASU”) No. 2011-04, which amends FASB Accounting Standards Codification (“ASC”) Topic 820, “Fair Value Measurements and Disclosures.” This amended guidance clarifies the wording used to describe many of the requirements in accounting literature for measuring fair value and for disclosing information about fair value measurements. The goal of the amendment is to create consistency between the United States and international accounting standards. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

Comprehensive income

In June 2011, the FASB issued ASU No. 2011-05, which amends ASC Topic 220, “Comprehensive Income.” This ASU allows an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendment no longer allows an entity to show changes to other comprehensive income solely through the statement of equity. For publicly traded entities, the guidance is effective for annual and interim reporting periods beginning on or after December 15, 2011. In December 2011, the FASB issued ASU No. 2011-12, which defers only those changes in ASU 2011-05 that relate to the presentation of reclassification adjustments. Our adoption of this guidance did not have a material impact on our financial condition, results of operations, cash flows or financial disclosures.

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Estimated Fair Value of Our Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total Long-term Debt, Carrying Value	$ 4,639,429	$ 4,071,964
Total Long-term Debt, Estimated Fair Value	5,051,381	4,331,412
5.875% Senior Notes due 2013 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	5.875%
Debt, Carrying Value	299,975	299,949
Debt, Estimated Fair Value	308,949	317,586
7.375% Senior Notes due 2014 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	7.375%
Debt, Carrying Value	249,760	249,647
Debt, Estimated Fair Value	272,063	278,966
3.45% Senior Notes due 2015 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.45%
Debt, Carrying Value	350,000	350,000
Debt, Estimated Fair Value	369,921	363,571
3.05% Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.05%
Debt, Carrying Value	299,948	299,938
Debt, Estimated Fair Value	314,142	306,057
2.50% Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	2.50%
Debt, Carrying Value	299,844
Total Long-term Debt, Carrying Value	299,844
Debt, Estimated Fair Value	309,118
7.50% Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	7.50%
Debt, Carrying Value	201,695	201,695
Debt, Estimated Fair Value	249,768	248,623
4.90% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	4.90%
Debt, Carrying Value	498,870	498,783
Total Long-term Debt, Carrying Value	498,870	498,783
Debt, Estimated Fair Value	559,783	531,437
4.625% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	4.625%
Debt, Carrying Value	399,515	399,480
Debt, Estimated Fair Value	440,799	416,847
3.95% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	3.95%
Debt, Carrying Value	399,075
Total Long-term Debt, Carrying Value	399,075
Debt, Estimated Fair Value	420,137
6.20% Senior Notes due 2040 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	6.20%
Debt, Carrying Value	399,891	399,890
Debt, Estimated Fair Value	466,331	450,017
6.05% Senior Notes due 2041 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	6.05%
Debt, Carrying Value	397,605	397,582
Debt, Estimated Fair Value	461,733	443,308
5.25% Senior Notes due 2042 [Member]
Debt Instrument [Line Items]
Interest rate on the notes issued to the joint venture partner	5.25%
Debt, Carrying Value	498,251
Debt, Estimated Fair Value	533,637
Credit Facilities [Member]
Debt Instrument [Line Items]
Debt, Carrying Value	345,000	975,000
Debt, Estimated Fair Value	$ 345,000	$ 975,000

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Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 16,637,626	$ 15,540,178
Drilling equipment and facilities [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	13,449,855	10,974,943
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	2,991,487	4,367,750
Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 196,284	$ 197,485

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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 129,680	$ 135,555	$ 421,698	$ 244,185
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	2,033	(4,929)	(4,994)	(547)
Gain (loss) on foreign currency forward contracts		(9,654)	3,061	(7,141)
Loss on interest rate swaps				(366)
Amortization of deferred pension plan amounts (net of tax provision of $790 and $356 for the three months ended September 30, 2012 and 2011, respectively, and $2,157 and $1,061 for the nine months ended September 30, 2012 and 2011, respectively)	1,351	687	4,177	2,062
Other comprehensive income/(loss), net	3,384	(13,896)	2,244	(5,992)
Net comprehensive income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Comprehensive income attributable to Noble Corporation	118,158	121,421	397,011	237,903
Noble-Cayman [Member]
Net income	146,629	155,952	466,276	292,482
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	2,033	(4,929)	(4,994)	(547)
Gain (loss) on foreign currency forward contracts		(9,654)	3,061	(7,141)
Loss on interest rate swaps				(366)
Amortization of deferred pension plan amounts (net of tax provision of $790 and $356 for the three months ended September 30, 2012 and 2011, respectively, and $2,157 and $1,061 for the nine months ended September 30, 2012 and 2011, respectively)	1,351	687	4,177	2,062
Other comprehensive income/(loss), net	3,384	(13,896)	2,244	(5,992)
Net comprehensive income attributable to noncontrolling interests	(14,906)	(238)	(26,931)	(290)
Comprehensive income attributable to Noble Corporation	$ 135,107	$ 141,818	$ 441,589	$ 286,200

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Consolidated Joint Ventures

9 Months Ended

Sep. 30, 2012

Consolidated Joint Ventures

Note 2 — Consolidated Joint Ventures

We own 50 percent interests in two joint ventures, each with a subsidiary of Royal Dutch Shell, PLC (“Shell”), for the construction and operation of our two Bully-class drillships. Since these entities’ equity at risk is insufficient to permit them to carry on their activities without additional financial support, they each meet the criteria for a variable interest entity. We have determined that we are the primary beneficiary for accounting purposes. Accordingly, we consolidate the entities in our consolidated financial statements after eliminating intercompany transactions. Shell’s equity interests are presented as noncontrolling interests on our Consolidated Balance Sheets.

In April 2011, the Bully joint venture partners entered into capital contribution agreements whereby capital calls up to a total of $360 million can be made for funds needed to complete the construction of the drillships. All contributions under these agreements were made during 2011 and the first quarter of 2012. No amounts remain available under these agreements.

At September 30, 2012, the combined carrying amount of the drillships was $1.5 billion, which was primarily funded through partners’ equity contributions.

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Carrying Amount and Estimated Fair Value of Financial Instruments (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets -
Marketable securities		$ 4,701
Liabilities -
Foreign currency forward contracts		3,061
Level 1 [Member]
Assets -
Marketable securities	5,745
Liabilities -
Foreign currency forward contracts
Level 2 [Member]
Assets -
Marketable securities
Liabilities -
Foreign currency forward contracts
Level 3 [Member]
Assets -
Marketable securities
Liabilities -
Foreign currency forward contracts
Carrying Amount [Member]
Assets -
Marketable securities	5,745	4,701
Liabilities -
Foreign currency forward contracts		$ 3,061

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Share Data (Tables)

9 Months Ended

Sep. 30, 2012

Noble-Swiss' Authorized Share Capital

The following is a detail of Noble-Swiss’ authorized share capital as of September 30, 2012 and December 31, 2011:

	September 30, 2012		December 31, 2011
Shares outstanding and trading		252,713		252,352
Treasury shares		586		287
Total shares outstanding		253,299		252,639
Treasury shares held for share-based compensation plans		12,851		13,511
Total shares authorized for issuance		266,150		266,150
Par value per share (in Swiss Francs)		3.15		3.41

Computation of Basic and Diluted Earnings Per Share for Noble-Swiss

The following table sets forth the computation of basic and diluted earnings per share for Noble-Swiss:

	Three months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
Allocation of net income
Basic
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Earnings allocated to unvested share-based payment awards		(1,192	)		(1,415	)		(4,008	)		(2,487	)
Net income to common shareholders—basic	$	113,582		$	133,902		$	390,759		$	241,408
Diluted
Net income attributable to Noble Corporation	$	114,774		$	135,317		$	394,767		$	243,895
Earnings allocated to unvested share-based payment awards		(1,190	)		(1,412	)		(4,002	)		(2,481	)
Net income to common shareholders—diluted	$	113,584		$	133,905		$	390,765		$	241,414
Weighted average shares outstanding—basic		252,657			251,580			252,339			251,327
Incremental shares issuable from assumed exercise of stock options		317			449			385			640
Weighted average shares outstanding—diluted		252,974			252,029			252,724			251,967
Weighted average unvested share-based payment awards		2,651			2,658			2,588			2,589
Earnings per share
Basic	$	0.45		$	0.53		$	1.55		$	0.96
Diluted	$	0.45		$	0.53		$	1.55		$	0.96

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Noble-Swiss' Authorized Share Capital (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Equity [Line Items]
Shares outstanding and trading	252,713	252,352
Treasury shares	586	287
Total shares outstanding	253,299	252,639
Treasury shares held for share-based compensation plans	12,851	13,511
Total shares authorized for issuance	266,150	266,150
Par value per share (in Swiss Francs)	$ 3.15	$ 3.41

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Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2012

Fair Value of Financial Instruments

Note 12 — Fair Value of Financial Instruments

The following table presents the carrying amount and estimated fair value of our financial instruments recognized at fair value on a recurring basis:

	September 30, 2012								December 31, 2011
			Estimated Fair Value Measurements
			Quoted		Significant
			Prices in		Other		Significant
			Active		Observable		Unobservable
	Carrying		Markets		Inputs		Inputs		Carrying		Estimated
	Amount		(Level 1)		(Level 2)		(Level 3)		Amount		Fair Value
Assets—
Marketable securities	$	5,745	$	5,745	$	—	$	—	$	4,701	$	4,701
Liabilities—
Foreign currency forward contracts	$	—	$	—	$	—	$	—	$	3,061	$	3,061

At the time of valuation, the derivative instruments were valued using actively quoted prices and quotes obtained from the counterparties to the derivative instruments. Our cash and cash equivalents, accounts receivable and accounts payable are by their nature short-term. As a result, the carrying values included in the accompanying Consolidated Balance Sheets approximate fair value.