Atwood Oceanics (ATW) 10-Q 1 Aug 14 2014 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jul. 31, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'ATWOOD OCEANICS INC	'
Entity Central Index Key	'0000008411	'
Current Fiscal Year End Date	'--09-30	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	64,343
Trading Symbol	'atw	'

Unaudited_Condensed_Consolidat

Unaudited Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
REVENUES:	'	'	'	'
Contract drilling	$264,925	$261,489	$798,544	$738,604
Revenues related to reimbursable expenses	27,852	11,199	52,036	32,338
Total revenues	292,777	272,688	850,580	770,942
COSTS AND EXPENSES:	'	'	'	'
Contract drilling	128,586	109,502	388,715	314,001
Reimbursable expenses	23,493	8,461	41,095	23,351
Depreciation	37,601	30,352	107,376	86,412
General and administrative	12,844	13,663	47,688	44,152
(Gain)/loss on sale of equipment	7	0	-34,072	0
Other, net	-212	-55	-1,815	-68
Total costs and expenses	202,319	161,923	548,987	467,848
OPERATING INCOME	90,458	110,765	301,593	303,094
OTHER INCOME (EXPENSE):	'	'	'	'
Interest expense, net of capitalized interest	-11,219	-5,692	-30,932	-16,647
Interest income	126	57	247	202
Other income (expense) total	-11,093	-5,635	-30,685	-16,445
INCOME BEFORE INCOME TAXES	79,365	105,130	270,908	286,649
PROVISION FOR INCOME TAXES	7,440	15,149	42,286	38,318
NET INCOME	$71,925	$89,981	$228,622	$248,331
EARNINGS PER COMMON SHARE (NOTE 2):	'	'	'	'
Basic (in dollars per share)	$1.12	$1.38	$3.56	$3.79
Diluted (in dollars per share)	$1.11	$1.37	$3.52	$3.75
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (NOTE 2):	'	'	'	'
Basic (in shares)	64,309	65,062	64,204	65,441
Diluted (in shares)	65,060	65,858	65,023	66,180

Unaudited_Condensed_Consolidat1

Unaudited Condensed Consolidated Statement Of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$71,925	$89,981	$228,622	$248,331
Other comprehensive gains (losses), net of tax:	'	'	'	'
Unrealized holding gain (loss)	96	51	-1,228	3
Loss reclassified to net income	363	441	1,284	1,316
Total other comprehensive gain, net of tax	459	492	56	1,319
Comprehensive income	$72,384	$90,473	$228,678	$249,650

Unaudited_Condensed_Consolidat2

Unaudited Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$119,161	$88,770
Accounts receivable	204,079	199,689
Income tax receivable	6,097	4,672
Inventories of materials and supplies	123,184	121,833
Prepaid expenses and deferred costs	16,136	38,796
Total current assets	468,657	453,760
Property and equipment, net	3,586,049	3,164,724
Other receivables	11,831	11,831
Deferred costs and other assets	31,572	26,951
Deferred income taxes	518	0
Total assets	4,098,627	3,657,266
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'
Accounts payable	70,312	95,827
Accrued liabilities	21,977	17,653
Notes payable	0	8,071
Interest payable	18,564	7,945
Income tax payable	22,586	16,554
Deferred credits	4,300	10,822
Total current liabilities	137,739	156,872
LONG TERM LIABILITIES:	'	'
Long-term debt	1,467,406	1,263,232
Deferred income taxes	354	485
Deferred credits	4,588	1,176
Other	38,099	28,130
Total long-term liabilities	1,510,447	1,293,023
Commitments and contingencies (Note 11)	'	'
Shareholders’ equity:	'	'
Preferred stock, no par value, 1,000 shares authorized, none outstanding	0	0
Common stock, $1.00 par value, 180,000 shares authorized with 64,338 issued and outstanding at June 30, 2014 and 90,000 shares authorized with 64,057 issued and outstanding at September 30, 2013	64,338	64,057
Paid-in capital	197,501	183,390
Retained earnings	2,190,027	1,961,405
Accumulated other comprehensive loss	-1,425	-1,481
Total shareholders' equity	2,450,441	2,207,371
Total liabilities and shareholders' equity	$4,098,627	$3,657,266

Unaudited_Condensed_Consolidat3

Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Sep. 30, 2013
Statement of Financial Position [Abstract]	'	'
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$1	$1
Common stock, shares authorized	180,000,000	90,000,000
Common stock, shares issued	64,338,000	64,057,000
Common stock, shares outstanding	64,338,000	64,057,000

Unaudited_Condensed_Consolidat4

Unaudited Condensed Consolidated Statement Of Changes In Shareholders' Equity (USD $)	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
In Thousands, unless otherwise specified
Beginning Balance at Sep. 30, 2013	$2,207,371	$64,057	$183,390	$1,961,405	($1,481)
Beginning Balance (in shares) at Sep. 30, 2013	'	64,057	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'
Net income	228,622	'	'	228,622	'
Other comprehensive loss	56	'	'	'	56
Restricted stock awards (in shares)	'	161	'	'	'
Restricted stock awards	0	161	-161	'	'
Exercise of employee stock options (in shares)	'	120	'	'	'
Exercise of employee stock options	3,468	120	3,348	'	'
Stock option and restricted stock award compensation expense	10,924	'	10,924	'	'
Ending Balance at Jun. 30, 2014	$2,450,441	$64,338	$197,501	$2,190,027	($1,425)
Ending Balance (in shares) at Jun. 30, 2014	'	64,338	'	'	'

Unaudited_Condensed_Consolidat5

Unaudited Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$228,622	$248,331
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation	107,376	86,412
Amortization of debt issuance costs and bond premium, net	3,389	3,083
Amortization of deferred items	2,487	1,227
Provision for doubtful accounts	679	3,510
Provision for inventory obsolescence	1,226	1,530
Deferred income tax benefit	-649	-605
Share-based compensation expense	10,924	10,418
Gain on sale of assets	-34,072	0
Other, net	1,990	-67
Changes in assets and liabilities:	'	'
Accounts receivable	-5,069	-18,297
Income tax receivable	-1,425	-1,391
Inventory	-8,816	-22,065
Prepaid expenses	14,100	12,788
Deferred costs and other assets	-10,512	-9,519
Accounts payable	-11,303	-10,970
Accrued liabilities	15,127	-6,745
Bond premium	0	8,500
Income tax payable	6,032	6,311
Deferred credits and other liabilities	21,141	9,989
Net cash provided by operating activities	341,247	322,440
Cash flows from investing activities:	'	'
Capital expenditures	-564,119	-569,696
Proceeds from sale of assets	59,516	129
Net cash used in investing activities	-504,603	-569,567
Cash flows from financing activities:	'	'
Proceeds from issuance of bonds	0	200,000
Proceeds from bank credit facilities	370,000	400,000
Principal payments on bank credit facilities	-165,000	-100,000
Principal payments on notes payable	-8,071	-5,148
Repurchase and retirement of common shares	0	-107,260
Proceeds from exercise of stock options	3,468	6,451
Debt issuance costs paid	-6,650	-2,910
Net cash provided by financing activities	193,747	391,133
Net increase in cash and cash equivalents	30,391	144,006
Cash and cash equivalents, at beginning of period	88,770	77,871
Cash and cash equivalents, at end of period	119,161	221,877
Non-cash activities:	'	'
Changes in accounts payable and accrued liabilities related to capital expenditures	($13,573)	($15,011)

Unaudited_Interim_Information

Unaudited Interim Information	9 Months Ended
	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Unaudited Interim Information	'
	UNAUDITED INTERIM INFORMATION
	The unaudited interim condensed consolidated financial statements of Atwood Oceanics, Inc. and its subsidiaries as of June 30, 2014, and for the three and nine months ended June 30, 2014 and 2013, included herein, have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Unless otherwise indicated, references to “we”, “us”, “our” and the “Company” refer collectively to Atwood Oceanics, Inc. and subsidiaries. The year-end condensed consolidated balance sheet data was derived from the audited financial statements as of September 30, 2013. Although these financial statements and related information have been prepared without audit, and certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted, we believe that the note disclosures are adequate to make the information not misleading. The interim financial results may not be indicative of results that could be expected for a full fiscal year. It is suggested that these unaudited condensed consolidated financial statements be read in conjunction with the audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended September 30, 2013. In our opinion, the unaudited interim financial statements reflect all adjustments considered necessary for a fair statement of our financial position, results of operations and cash flows for the periods presented.

Earnings_Per_Common_Share

Earnings Per Common Share	9 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Common Share	'
	EARNINGS PER COMMON SHARE
	The computation of basic and diluted earnings per share for the three and nine months ended June 30, 2014 and 2013 is as follows:
		Three Months Ended						Nine Months Ended
	(In thousands, except per share amounts)	Net		Shares	Per Share			Net Income		Shares	Per Share
		Income			Amount						Amount
	June 30, 2014
	Basic earnings per share	$	71,925	64,309	$	1.12		$	228,622	64,204	$	3.56
	Effect of dilutive securities:
	Stock options	—		216	$	—		—		250	$	(0.01	)
	Restricted stock	—		535	$	(0.01	)	—		569	$	(0.03	)
	Diluted earnings per share	$	71,925	65,060	$	1.11		$	228,622	65,023	$	3.52
	June 30, 2013
	Basic earnings per share	$	89,981	65,062	$	1.38		$	248,331	65,441	$	3.79
	Effect of dilutive securities:
	Stock options	—		304	$	—		—		367	$	(0.02	)
	Restricted stock	—		492	$	(0.01	)	—		372	$	(0.02	)
	Diluted earnings per share	$	89,981	65,858	$	1.37		$	248,331	66,180	$	3.75
	For the purpose of calculating diluted earnings per share for each of the three and nine months ended June 30, 2014, no anti-dilutive stock options were outstanding. For each of the three and nine months ended June 30, 2013, the calculation excludes shares of common stock related to approximately 283,000 outstanding anti-dilutive stock options.

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-Based Compensation	'
	SHARE-BASED COMPENSATION
	Share-based compensation cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the requisite service period, which is generally the vesting period of the equity award. As of June 30, 2014, unrecognized compensation cost, net of estimated forfeitures, related to stock options and restricted stock awards was approximately $1.7 million and $18.8 million, respectively, which we expect to recognize over a weighted average period of approximately 1.9 years.
	Stock Options
	Under our stock incentive plans, the exercise price of each stock option must be equal to or greater than the fair market value of one share of our common stock on the date of grant, with all outstanding options having a maximum term of 10 years. Options vest ratably over a period ranging from the end of the first to the fourth year from the date of grant for stock options. Each option is for the purchase of one share of our common stock.
	A summary of stock option activity during the nine months ended June 30, 2014 is as follows:
		Number of Options (000s)		Wtd. Avg. Exercise Price		Wtd. Avg. Remaining Contractual Life (Years)	Aggregate Intrinsic Value (000s)
	Outstanding at October 1, 2013	989		$	33.21	5.9	$	21,592
	Granted	—		$	—
	Exercised	-120		$	29.39		$	2,564
	Forfeited	-30		$	40.24
	Outstanding at June 30, 2014	839		$	33.53	5.2	$	15,803
	Exercisable at June 30, 2014	666		$	31.79	4.8	$	13,787
	Restricted Stock Units
	We have awarded restricted stock units to certain employees and to our non-employee directors. All current awards of restricted stock units to employees are subject to a vesting and restriction period ranging from three to four years, subject to acceleration upon certain events as set forth in the terms of the grant. In addition, certain awards of restricted stock units to employees are subject to market-based performance conditions. The number of shares that vest based on market-based performance conditions will depend on the degree of achievement of specified corporate performance criteria which are strictly market-based. All awards of restricted stock units to non-employee directors are subject to a vesting and restriction period of a minimum of 13 months, subject to acceleration upon certain events as set forth in the terms of the grant. We value restricted stock awards based on the fair market value of our common stock on the date of grant and also adjust to fair market value for any awards subject to market-based performance conditions, where applicable.
	A summary of restricted stock activity for the nine months ended June 30, 2014 is as follows:
		Number of Shares (000s)	Wtd. Avg. Fair Value
	Unvested at October 1, 2013	849	$	42.42
	Granted	321	$	54.01
	Vested	-161	$	38.94
	Forfeited	-106	$	45.44
	Unvested at June 30, 2014	903	$	52.48

Property_And_Equipment

Property And Equipment	9 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property and Equipment	'
	PROPERTY AND EQUIPMENT
	A summary of property and equipment by classification is as follows:
	(In thousands)	June 30,			September 30,
		2014			2013
	Drilling vessels and equipment	$	3,552,698		$	2,979,503
	Construction work in progress	535,372			715,320
	Drill pipe	27,477			26,743
	Office equipment and other	35,747			24,439
	Cost	4,151,294			3,746,005
	Less: Accumulated depreciation	(565,245		)	(581,281		)
	Drilling and other property and equipment, net	$	3,586,049		$	3,164,724
	Property and equipment are recorded at cost. Interest incurred related to property under construction is capitalized as a component of construction costs. Interest capitalized during the three months ended June 30, 2014 and 2013 was approximately $6.7 million and $8.2 million, respectively. Interest capitalized during the nine months ended June 30, 2014 and 2013 was $22.9 million and $23.7 million, respectively.
	Construction Projects
	Our first ultra-deepwater drillship, the Atwood Advantage, was delivered from the Daewoo Shipbuilding and Marine Engineering Co., Ltd. ("DSME") yard in South Korea in December 2013.
	As of June 30, 2014, we had expended approximately $555 million towards our three other ultra-deepwater drillships under construction at the DSME yard. Total remaining firm commitments for these three drillships under construction were approximately $1.2 billion at June 30, 2014.
	Sale of Assets
	During January 2014, we completed the sale of our standard jackup drilling unit, the Vicksburg, for a sales price of $55.4 million pursuant to a definitive sales agreement entered into on October 3, 2013. As of the date of sale, the carrying value of the rig and its related inventory was approximately $20.5 million.
	During April 2014, we completed the sale of a wholly owned subsidiary which owned our semisubmersible tender assist drilling rig, the Seahawk, for a sales price of $4.0 million. The carrying value of the rig and of its related inventory, inclusive of a $2.0 million impairment charge recorded in the second quarter of the current fiscal year, approximated its sales price.

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	LONG-TERM DEBT
	A summary of long-term debt is as follows:
	(In thousands)	June 30,		September 30,
		2014		2013
	6.5% Senior Notes due 2020, bearing fixed interest at 6.5% per annum, net of unamortized premium	$	657,406	$	658,232
	Revolving credit facility, bearing interest at approximately 2.4%(1) per annum at June 30, 2014 and 3.0%(1) per annum at September 30, 2013	810,000		605,000
		$	1,467,406	$	1,263,232
	(1) After the impact of our interest rate swaps.
	Revolving Credit Facility
	As of June 30, 2014, we had $810 million of outstanding borrowings and $8.2 million letters of credit issued under our senior secured revolving credit facility. On April 10, 2014, we entered into an agreement to amend and restate the credit facility (the "Restatement Agreement"), which increased total commitments to $1.55 billion from $1.1 billion and extended its maturity to May 2018 from May 2016. Our wholly owned subsidiary, Atwood Offshore Worldwide Limited, is the borrower under the credit facility, and we and certain of our other subsidiaries are guarantors under the facility. Prior to the Restatement Agreement, borrowings under the credit facility bore interest at the Eurodollar rate plus a margin ranging from 2.00% to 2.50%, and the commitment fee on the unused portion of underlying commitments ranged from 0.5% to 1.0% per annum. As a result of the Restatement Agreement, borrowings under the credit facility bear interest at the Eurodollar rate plus a margin ranging from 1.75% to 2.00% and the commitment fee on the unused portion of the underlying commitment ranges from 0.30% to 0.40% per annum, in each case based on our corporate credit ratings. Certain borrowings effectively bear interest at a fixed rate due to our interest rate swaps. See Note 6. The average interest rate for borrowings under the credit facility was approximately 2.4% per annum at June 30, 2014, after considering the impact of our interest rate swaps. As of June 30, 2014, we were in compliance with all financial covenants under the credit facility, and from June 30, 2014 to July 31, 2014, no additional borrowings were made under the credit facility.
	In connection with the Restatement Agreement, the Company mortgaged as additional collateral the Atwood Mako and the Atwood Manta. As a result, the revolving credit facility is now secured primarily by first preferred mortgages on nine of our active drilling units (the Atwood Aurora, Atwood Beacon, Atwood Eagle, Atwood Falcon, Atwood Hunter, Atwood Osprey, Atwood Condor, Atwood Mako, and Atwood Manta), as well as liens on the equity interests of our subsidiaries that own, directly or indirectly, such drilling units.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	DERIVATIVE FINANCIAL INSTRUMENTS
	Interest Rate Swap Contracts
	Our credit facility exposes us to short-term changes in market interest rates as our interest obligations on these instruments are periodically re-determined based on the prevailing Eurodollar rate. We enter into interest rate swaps to limit our exposure to fluctuations and volatility in interest rates.
	During the nine months ended June 30, 2014, we had interest rate swaps that effectively fixed the interest rate on $250 million of borrowings under the credit facility at a weighted average interest rate of 3.4% prior to April 10, 2014, the effective date of the Restatement Agreement, and 2.9% thereafter. Such interest rate swaps continue through September 2014. In December 2013, we entered into interest rate swaps that extend the Company's current hedging program and effectively fix the interest rate on $250 million of borrowings at a weighted average interest rate of 2.6% from September 2014 to March 2016. As of June 30, 2014, these interest rate swaps are designated as cash flow hedging instruments.
	Foreign Currency Forward Exchange Contracts
	We conduct business in numerous foreign countries. Our functional currency is the U.S. dollar and thus our international operations expose us to foreign currency risk associated with cash flows from transactions denominated in currencies other than our functional currency. As needed, we enter into foreign currency forward exchange contracts to limit our exposure to fluctuations and volatility in foreign currency exchange rates.
	In December 2013, we entered into foreign currency forward exchange contracts for a portion of our anticipated euro receipts associated with revenues earned on a drilling contract from December 2013 through November 2015. At June 30, 2014, these forward contracts effectively fix the euro/U.S. dollar exchange rate at 1.3659 on an aggregate notional amount of 60 million euro and settle monthly from July 2014 through February 2016. As of June 30, 2014, these forward contracts are designated as cash flow hedging instruments.
	We do not engage in derivative transactions for speculative or trading purposes and we are not a party to leveraged derivatives.
	Condensed Consolidated Balance Sheets
	We record our derivative contracts at fair value on our consolidated balance sheets. See Note 7. The following table presents the fair value of our derivative contracts designated as cash flow hedging instruments included in our Condensed Consolidated Balance Sheets as of June 30, 2014 and September 30, 2013:
		Asset Derivatives										Liability Derivatives
	(In thousands)			30-Jun-14				30-Sep-13						30-Jun-14				30-Sep-13
	Derivative contracts designated as cash flow hedging instruments	Balance Sheet Location		Fair Value				Fair Value				Balance Sheet Location		Fair Value				Fair Value
	Short-term interest rate swaps	Prepaid expenses and deferred costs		$	—			$	—			Accrued liabilities		$	1,126			$	1,586
	Long-term interest rate swaps	Deferred costs and other assets		12				—				Other long-term liabilities		—				—
	Short-term foreign currency forward exchange contracts	Prepaid expenses and deferred costs		—				—				Accrued liabilities		173				—
	Long-term foreign currency forward exchange contracts	Deferred costs and other assets		—				—				Other long-term liabilities		129				—
	Total derivatives designated as cash flow hedging instruments			$	12			$	—					$	1,428			$	1,586
	We do not have any derivative contracts not designated as hedging instruments.
	Condensed Consolidated Statements of Operation and Statements of Comprehensive Income
	The following table presents the gains and losses on our derivative contracts designated as cash flow hedging instruments on our Condensed Consolidated Statements of Operations and Condensed Statements of Comprehensive Income for the three months ended June 30, 2014 and 2013:
	Derivative contracts designated as cash flow hedging instruments	Amount of Gain or (Loss) Recognized in AOCI on Derivative								Location of Gain or (Loss) Reclassified from AOCI in Income		Amount of Gain or (Loss) Reclassified from AOCI into Income
		(Effective Portion)										(Effective Portion)
	(In thousands)	Three Months Ended June 30,										Three Months Ended June 30,
		2014				2013						2014				2013
	Interest rate swaps	$	(490	)		$	51			Interest expense, net of capitalized interest		$	(488	)		$	(441	)
	Foreign currency forward exchange contracts	586				—				Contract drilling revenues & costs		125				—
	Total	$	96			$	51					$	(363	)		$	(441	)
	The following table presents the gains and losses on our derivative contracts designated as cash flow hedging instruments on our Condensed Consolidated Statements of Operations and Condensed Statements of Comprehensive Income for the nine months ended June 30, 2014 and 2013:
	Derivative contracts designated as cash flow hedging instruments	Amount of Gain or (Loss) Recognized in AOCI on Derivative								Location of Gain or (Loss) Reclassified from AOCI in Income		Amount of Gain or (Loss) Reclassified from AOCI into Income
		(Effective Portion)										(Effective Portion)
	(In thousands)	Nine Months Ended June 30,										Nine Months Ended June 30,
		2014				2013						2014				2013
	Interest rate swaps	$	(926	)		$	3			Interest expense, net of capitalized interest		$	(1,293	)		$	(1,316	)
	Foreign currency forward exchange contracts	(302		)		—				Contract drilling revenues & costs		9				—
	Total	$	(1,228	)		$	3					$	(1,284	)		$	(1,316	)
	Each quarter, changes in the fair values of our derivative instruments designated as cash flow hedging instruments will adjust the balance sheet asset or liability, with an offset to Accumulated Other Comprehensive Income (“AOCI”) for the effective portion of the hedge. The effective portion of the cash flow hedge will remain in AOCI until it is reclassified into earnings in the period or periods during which the hedged transaction affects earnings or when it is probable that the hedged forecasted transaction will not occur by the end of the originally specified time period.
	Any change in fair value resulting from ineffectiveness is recognized immediately in earnings. For the three and nine months ended June 30, 2014 and for the three and nine months ended June 30, 2013, no loss was recognized on our Consolidated Statement of Operations due to hedge ineffectiveness. Additionally, there were no gains or losses recognized in income for the three and nine months ended June 30, 2014 and 2013 as a result of excluding amounts from the assessment of hedge effectiveness or as a result of reclassifications to earnings following the discontinuance of any cash flow hedges.
	As of June 30, 2014, the estimated amount of unrealized losses associated with our interest rate derivative contracts that will be reclassified to earnings during the next twelve months totals $1.1 million. As of June 30, 2014, the estimated amount of unrealized losses associated with our foreign exchange forward currency contracts that will be reclassified to earnings during the next twelve months is approximately $0.2 million.
	Derivative Contract Agreements
	None of our derivative contracts contain credit-risk related contingent features, and no amounts of cash collateral were posted by us related to net liability positions as of June 30, 2014. Our interest rate swaps are secured by the collateral package of our revolving credit facility.
	We report the fair value of our derivative contracts on our Consolidated Balance Sheets on a gross basis by type of contract as either short-term or long-term. We determine the short-term and long-term classification based on the timing of expected future cash flows. The following table represents our gross and net derivative assets and liabilities:
	(In thousands)	Gross Amount Presented on the Consolidated Balance Sheets				Netting Adjustments (a)				Net Amount
	June 30, 2014
	Derivative assets	$	12			$	(12	)		$	—
	Derivative liabilities	(1,428		)		12				(1,416		)
	September 30, 2013
	Derivative assets	$	—			$	—			$	—
	Derivative liabilities	(1,586		)		—				(1,586		)
	(a) We have agreements in place with some of our financial trading counterparties that allow for the financial right of offset for derivative assets and derivative liabilities under the agreements.

Fair_Value

Fair Value	9 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value	'
	FAIR VALUE
	We have certain assets and liabilities that are required to be measured and disclosed at fair value in accordance with generally accepted accounting principles (“GAAP”). Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.
	The established GAAP fair value hierarchy prioritizes inputs to valuation techniques used to measure fair value into three levels. Priority is given to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Assets and liabilities measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, takes into account the market for our financial assets and liabilities, the associated credit risk and other considerations.
	We have classified and disclosed fair value measurements using the following levels of the fair value hierarchy:
	Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
	Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability.
	Level 3: Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity).
	Fair value of Certain Assets and Liabilities
	The carrying value of cash and cash equivalents, accounts receivable, accounts payable and short-term notes payable approximate fair value because of their short term maturities.
	Fair Value of Financial Instruments
	The fair value of financial instruments is determined by using quoted market prices when available. When quoted prices are not available, independent third party services may be used to determine the fair value with reference to observable inputs used.
	The following table sets forth the estimated fair value of certain financial instruments at June 30, 2014 and September 30, 2013, which are measured and recorded at fair value on a recurring basis:
			June 30, 2014
			Fair Value Measurements
	(In thousands)	Asset/(Liability)	Carrying			Level 1		Level 2			Level 3		Estimated
			Amount										Fair  Value
	Type of Contract	Balance Sheet Classification
	Short-term interest rate swaps	Accrued liabilities	$	(1,126	)	$	—	$	(1,126	)	$	—	$	(1,126	)
	Long-term interest rate swaps	Deferred costs and other assets	$	12		—		$	12		—		$	12
	Short-term foreign exchange forward currency contracts	Accrued liabilities	$	(173	)	$	—	$	(173	)	$	—	$	(173	)
	Long-term foreign exchange forward currency contracts	Other long-term liabilities	$	(129	)	$	—	$	(129	)	$	—	$	(129	)
	Total derivative contracts, net		$	(1,416	)	$	—	$	(1,416	)	$	—	$	(1,416	)
			September 30, 2013
			Fair Value Measurements
	(In thousands)	Asset/(Liability)	Carrying			Level 1		Level 2			Level 3		Estimated
			Amount										Fair  Value
	Type of Contract	Balance Sheet Classification
	Short-term interest rate swaps	Accrued liabilities	$	(1,586	)	$	—	$	(1,586	)	$	—	$	(1,586	)
	Total derivative contracts, net		$	(1,586	)	$	—	$	(1,586	)	$	—	$	(1,586	)
	Derivative financial instruments - Our derivative financial instruments consist of our interest rate swap contracts and our foreign currency forward exchange contracts.
	The fair values of our interest rate swaps and our foreign currency forward exchange contracts are based upon valuations calculated by an independent third party. The derivatives were valued according to the "Market approach" where possible, and the "Income approach" otherwise. A third party independently valued each instrument using forward price data obtained from reputable data providers (e.g., Bloomberg and Reuters) and reviewed market activity and similarity of pricing terms to determine appropriate reliability level assertions for each instrument. The contribution of the credit valuation adjustment to total fair value is less than 1% for all derivatives and is therefore not significant. Based on valuation inputs for fair value measurement and independent review performed by third party consultants, we have classified our derivative contracts as Level 2 as they were valued based upon observable inputs from dealer markets.
	Long-term Debt – Our long-term debt consists of both our 6.5% Senior Notes due 2020 ("Senior Notes") and our revolving credit facility.
	Senior Notes – The carrying value of our Senior Notes, net of unamortized premium, is $657.4 million ($650 million principal amount) while the fair value of those Senior Notes is $697.1 million. The fair value is determined by a market approach using quoted period-end bond prices. We have classified this instrument as Level 2 as valuation inputs for fair value measurements are quoted market prices as of June 30, 2014 that can only be obtained from independent third party sources. The fair value amount has been calculated using these quoted prices. However, no assurance can be given that the fair value would be the amount realized in an active market exchange.
	Revolving Credit Facility – The carrying amounts of our variable-rate debt approximates fair value because such debt bears short-term, market-based interest rates. We have classified this instrument as Level 2 as valuation inputs for purposes of determining our fair value disclosure are readily available published Eurodollar rates.

Income_Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	Our consolidated effective income tax rate for the three and nine months ended June 30, 2014 was approximately 9% and 16%, respectively, as compared to 14% and 13% for the three and nine months ended June 30, 2013, respectively. The effective tax rate for the nine months ended June 30, 2014 was higher than the rate for the nine months ended June 30, 2013 primarily due to tax expenditures relating to the income received on the sale of the Vicksburg as well as an increase to our reserve for uncertain tax provisions. The effective tax rate for the three months ended June 30, 2014 was lower than the rate for the three months ended June 30, 2013 primarily due to the recognition of discrete tax benefits during the three months ended June 30, 2014. Our effective tax rate was lower than the U.S. statutory rate of 35% as a result of working in certain lower tax jurisdictions outside the United States. We record estimated accrued interest and penalties related to uncertain tax positions as income tax expense. At June 30, 2014, we had approximately $12.0 million of reserves for uncertain tax positions, including estimated accrued interest and penalties of $3.2 million, which are included in Other long-term liabilities in the Consolidated Balance Sheet. None of our reserves for uncertain tax positions relate to timing differences. All $12.0 million of the net uncertain tax liabilities would affect the effective tax rate if realized.
	Our United States tax returns for fiscal year 2010 and subsequent years remain subject to examination by tax authorities. As we conduct business globally, we have various tax years that remain open to examination in certain international tax jurisdictions, including tax returns in Australia for fiscal years 2008 through 2013 and tax returns in Equatorial Guinea for calendar years 2011 through 2013. Although we cannot predict the outcome of ongoing or future tax examinations, we do not anticipate that the ultimate resolution of these examinations will have a material impact on our consolidated financial position, results of operations or cash flows.

Capital_Stock

Capital Stock	9 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Capital Stock	'
	CAPITAL STOCK
	At the Company's 2014 Annual Meeting of Shareholders held on February 19, 2014, our shareholders approved an amendment to our Amended and Restated Certificate of Formation to increase the number of authorized shares of our common stock from 90,000,000 to 180,000,000. The Company has the authority to issue 181,000,000 shares of capital stock, including 180,000,000 shares of common stock, each with a par value of $1.00 per share, and 1,000,000 shares of preferred stock, each with no par value.

Recently_Issued_Accounting_Pro

Recently Issued Accounting Pronouncements	9 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Recently Issued Accounting Pronouncements	'
	RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS
	In April 2014, the FASB issued ASU 2014-08, "Presentation of Financial Statement (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity" which changes the criteria and requires additional disclosures for reporting discontinued operations. The amendments in ASU 2014-08 are effective for all disposals of components of an entity that occur within annual periods beginning on or after December 15, 2014, and interim periods within annual periods beginning on or after December 15, 2015. We do not expect that our adoption will have a material impact on our financial statements or disclosures in our financial statements.
	In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers (Topic 606)" which clarifies and improves the principles for recognizing revenue and develops a common revenue standard for United States generally accepted accounting principles (U.S. GAAP) and International Financial Reporting Standards (IFRS) that among other things, improves comparability of revenue recognition practices and provides more useful information to users of financial statements through improved disclosure requirements. The amendments in ASU 2014-09 are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted. We are currently reviewing the effect of ASU 2014-09 on our revenue recognition.
	In June 2014, the FASB issued ASU 2014-12, "Compensation - Stock Compensation (Topic 718)" which provides explicit guidance on the treatment of awards with performance targets that could be achieved after the requisite service period. The amendments in ASU 2014-12 are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. We do not expect that our adoption will have a material impact on our financial statements or disclosures in our financial statements.

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Litigation
	We are party to a number of lawsuits which are ordinary, routine litigation incidental to our business, the outcome of which is not expected to have, either individually or in the aggregate, a material adverse effect on our financial position, results of operations, or cash flows.
	Other Matters
	The Atwood Beacon operated in India from early December 2006 to the end of July 2009. A service tax was enacted in India in 2004 on revenues derived from seismic and exploration activities. This service tax law was subsequently amended in June 2007 and again in May 2008 to state that revenues derived from mining services and drilling services were specifically subject to this service tax. The contract terms with our customer in India provided that any liability incurred by us related to any taxes pursuant to laws not in effect at the time the contract was executed in 2005 was to be reimbursed by our customer. We believe any service taxes assessed by the Indian tax authorities under the 2007 or 2008 amendments are an obligation of our customer. Our customer is disputing this obligation on the basis of its contention that revenues derived from drilling services were taxable under the initial 2004 law, and are, therefore, our obligation.
	After reviewing the status of the drilling services we provided to our customer, the Indian tax authorities assessed service tax obligations on revenues derived from the Atwood Beacon commencing on June 1, 2007. The relevant Indian tax authority issued an extensive written ruling setting forth the application of the June 1, 2007 service tax regulation and confirming the position that drilling services, including the services performed under our contract with our customer prior to June 1, 2007, were not covered by the 2004 service tax law. In August 2012, the Indian Custom Excise and Service Tax Appellate Tribunal issued an Order in our favor confirming our position that service tax did not apply to drilling services performed prior to June 1, 2007. The Indian Service Tax Authority has appealed this ruling to the Indian Supreme Court.
	As of June 30, 2014, we had paid to the Indian government $10.5 million in service taxes and have accrued $1.3 million of additional service tax obligations in accrued liabilities on our consolidated balance sheets, for a total of $11.8 million relating to service taxes. We recorded a corresponding $11.8 million long-term other receivable due from our customer relating to service taxes due under the contract. We continue to pursue collection of such amounts from our customer and expect to collect the amount recorded as receivable.

Unaudited_Interim_Information_

Unaudited Interim Information (Policies)	9 Months Ended
	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Share-Based Compensation	'
	Share-based compensation cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the requisite service period, which is generally the vesting period of the equity award.
Property and Equipment	'
	Property and equipment are recorded at cost. Interest incurred related to property under construction is capitalized as a component of construction costs.
Derivative Financial Instruments	'
	Each quarter, changes in the fair values of our derivative instruments designated as cash flow hedging instruments will adjust the balance sheet asset or liability, with an offset to Accumulated Other Comprehensive Income (“AOCI”) for the effective portion of the hedge. The effective portion of the cash flow hedge will remain in AOCI until it is reclassified into earnings in the period or periods during which the hedged transaction affects earnings or when it is probable that the hedged forecasted transaction will not occur by the end of the originally specified time period.
Fair Value Measurement	'
	We have certain assets and liabilities that are required to be measured and disclosed at fair value in accordance with generally accepted accounting principles (“GAAP”). Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.
	The established GAAP fair value hierarchy prioritizes inputs to valuation techniques used to measure fair value into three levels. Priority is given to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Assets and liabilities measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, takes into account the market for our financial assets and liabilities, the associated credit risk and other considerations.
	We have classified and disclosed fair value measurements using the following levels of the fair value hierarchy:
	Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
	Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability.
	Level 3: Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity).
Income Taxes	'
	We record estimated accrued interest and penalties related to uncertain tax positions as income tax expense.
Recently Issued Accounting Pronouncements	'
	In April 2014, the FASB issued ASU 2014-08, "Presentation of Financial Statement (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity" which changes the criteria and requires additional disclosures for reporting discontinued operations. The amendments in ASU 2014-08 are effective for all disposals of components of an entity that occur within annual periods beginning on or after December 15, 2014, and interim periods within annual periods beginning on or after December 15, 2015. We do not expect that our adoption will have a material impact on our financial statements or disclosures in our financial statements.
	In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers (Topic 606)" which clarifies and improves the principles for recognizing revenue and develops a common revenue standard for United States generally accepted accounting principles (U.S. GAAP) and International Financial Reporting Standards (IFRS) that among other things, improves comparability of revenue recognition practices and provides more useful information to users of financial statements through improved disclosure requirements. The amendments in ASU 2014-09 are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted. We are currently reviewing the effect of ASU 2014-09 on our revenue recognition.
	In June 2014, the FASB issued ASU 2014-12, "Compensation - Stock Compensation (Topic 718)" which provides explicit guidance on the treatment of awards with performance targets that could be achieved after the requisite service period. The amendments in ASU 2014-12 are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. We do not expect that our adoption will have a material impact on our financial statements or disclosures in our financial statements.

Earnings_Per_Common_Share_Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Earnings Per Share	'
	The computation of basic and diluted earnings per share for the three and nine months ended June 30, 2014 and 2013 is as follows:
		Three Months Ended						Nine Months Ended
	(In thousands, except per share amounts)	Net		Shares	Per Share			Net Income		Shares	Per Share
		Income			Amount						Amount
	June 30, 2014
	Basic earnings per share	$	71,925	64,309	$	1.12		$	228,622	64,204	$	3.56
	Effect of dilutive securities:
	Stock options	—		216	$	—		—		250	$	(0.01	)
	Restricted stock	—		535	$	(0.01	)	—		569	$	(0.03	)
	Diluted earnings per share	$	71,925	65,060	$	1.11		$	228,622	65,023	$	3.52
	June 30, 2013
	Basic earnings per share	$	89,981	65,062	$	1.38		$	248,331	65,441	$	3.79
	Effect of dilutive securities:
	Stock options	—		304	$	—		—		367	$	(0.02	)
	Restricted stock	—		492	$	(0.01	)	—		372	$	(0.02	)
	Diluted earnings per share	$	89,981	65,858	$	1.37		$	248,331	66,180	$	3.75

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	9 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Stock Option Activity	'
	A summary of stock option activity during the nine months ended June 30, 2014 is as follows:
		Number of Options (000s)		Wtd. Avg. Exercise Price		Wtd. Avg. Remaining Contractual Life (Years)	Aggregate Intrinsic Value (000s)
	Outstanding at October 1, 2013	989		$	33.21	5.9	$	21,592
	Granted	—		$	—
	Exercised	-120		$	29.39		$	2,564
	Forfeited	-30		$	40.24
	Outstanding at June 30, 2014	839		$	33.53	5.2	$	15,803
	Exercisable at June 30, 2014	666		$	31.79	4.8	$	13,787
Schedule of Restricted Stock Activity	'
	A summary of restricted stock activity for the nine months ended June 30, 2014 is as follows:
		Number of Shares (000s)	Wtd. Avg. Fair Value
	Unvested at October 1, 2013	849	$	42.42
	Granted	321	$	54.01
	Vested	-161	$	38.94
	Forfeited	-106	$	45.44
	Unvested at June 30, 2014	903	$	52.48

Property_and_Equipment_Tables

Property and Equipment (Tables)	9 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Summary of Property and Equipment by Classification	'
	A summary of property and equipment by classification is as follows:
	(In thousands)	June 30,			September 30,
		2014			2013
	Drilling vessels and equipment	$	3,552,698		$	2,979,503
	Construction work in progress	535,372			715,320
	Drill pipe	27,477			26,743
	Office equipment and other	35,747			24,439
	Cost	4,151,294			3,746,005
	Less: Accumulated depreciation	(565,245		)	(581,281		)
	Drilling and other property and equipment, net	$	3,586,049		$	3,164,724

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Summary of Long-Term Debt	'
	A summary of long-term debt is as follows:
	(In thousands)	June 30,		September 30,
		2014		2013
	6.5% Senior Notes due 2020, bearing fixed interest at 6.5% per annum, net of unamortized premium	$	657,406	$	658,232
	Revolving credit facility, bearing interest at approximately 2.4%(1) per annum at June 30, 2014 and 3.0%(1) per annum at September 30, 2013	810,000		605,000
		$	1,467,406	$	1,263,232
	(1) After the impact of our interest rate swaps.

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosures	'
Offsetting Assets and Liabilities	'
	The following table represents our gross and net derivative assets and liabilities:
	(In thousands)	Gross Amount Presented on the Consolidated Balance Sheets				Netting Adjustments (a)				Net Amount
	June 30, 2014
	Derivative assets	$	12			$	(12	)		$	—
	Derivative liabilities	(1,428		)		12				(1,416		)
	September 30, 2013
	Derivative assets	$	—			$	—			$	—
	Derivative liabilities	(1,586		)		—				(1,586		)
	(a) We have agreements in place with some of our financial trading counterparties that allow for the financial right of offset for derivative assets and derivative liabilities under the agreements.
Designated as Hedging Instrument | Cash Flow Hedging	'
Derivative Instruments and Hedging Activities Disclosures	'
Fair Value of Cash Flow Hedge Derivative Contracts Included in the Consolidated Balance Sheets	'
	The following table presents the fair value of our derivative contracts designated as cash flow hedging instruments included in our Condensed Consolidated Balance Sheets as of June 30, 2014 and September 30, 2013:
		Asset Derivatives										Liability Derivatives
	(In thousands)			30-Jun-14				30-Sep-13						30-Jun-14				30-Sep-13
	Derivative contracts designated as cash flow hedging instruments	Balance Sheet Location		Fair Value				Fair Value				Balance Sheet Location		Fair Value				Fair Value
	Short-term interest rate swaps	Prepaid expenses and deferred costs		$	—			$	—			Accrued liabilities		$	1,126			$	1,586
	Long-term interest rate swaps	Deferred costs and other assets		12				—				Other long-term liabilities		—				—
	Short-term foreign currency forward exchange contracts	Prepaid expenses and deferred costs		—				—				Accrued liabilities		173				—
	Long-term foreign currency forward exchange contracts	Deferred costs and other assets		—				—				Other long-term liabilities		129				—
	Total derivatives designated as cash flow hedging instruments			$	12			$	—					$	1,428			$	1,586
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	'
	The following table presents the gains and losses on our derivative contracts designated as cash flow hedging instruments on our Condensed Consolidated Statements of Operations and Condensed Statements of Comprehensive Income for the three months ended June 30, 2014 and 2013:
	Derivative contracts designated as cash flow hedging instruments	Amount of Gain or (Loss) Recognized in AOCI on Derivative								Location of Gain or (Loss) Reclassified from AOCI in Income		Amount of Gain or (Loss) Reclassified from AOCI into Income
		(Effective Portion)										(Effective Portion)
	(In thousands)	Three Months Ended June 30,										Three Months Ended June 30,
		2014				2013						2014				2013
	Interest rate swaps	$	(490	)		$	51			Interest expense, net of capitalized interest		$	(488	)		$	(441	)
	Foreign currency forward exchange contracts	586				—				Contract drilling revenues & costs		125				—
	Total	$	96			$	51					$	(363	)		$	(441	)
	The following table presents the gains and losses on our derivative contracts designated as cash flow hedging instruments on our Condensed Consolidated Statements of Operations and Condensed Statements of Comprehensive Income for the nine months ended June 30, 2014 and 2013:
	Derivative contracts designated as cash flow hedging instruments	Amount of Gain or (Loss) Recognized in AOCI on Derivative								Location of Gain or (Loss) Reclassified from AOCI in Income		Amount of Gain or (Loss) Reclassified from AOCI into Income
		(Effective Portion)										(Effective Portion)
	(In thousands)	Nine Months Ended June 30,										Nine Months Ended June 30,
		2014				2013						2014				2013
	Interest rate swaps	$	(926	)		$	3			Interest expense, net of capitalized interest		$	(1,293	)		$	(1,316	)
	Foreign currency forward exchange contracts	(302		)		—				Contract drilling revenues & costs		9				—
	Total	$	(1,228	)		$	3					$	(1,284	)		$	(1,316	)

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Estimated Fair Value Of Financial Instruments	'
	The following table sets forth the estimated fair value of certain financial instruments at June 30, 2014 and September 30, 2013, which are measured and recorded at fair value on a recurring basis:
			June 30, 2014
			Fair Value Measurements
	(In thousands)	Asset/(Liability)	Carrying			Level 1		Level 2			Level 3		Estimated
			Amount										Fair  Value
	Type of Contract	Balance Sheet Classification
	Short-term interest rate swaps	Accrued liabilities	$	(1,126	)	$	—	$	(1,126	)	$	—	$	(1,126	)
	Long-term interest rate swaps	Deferred costs and other assets	$	12		—		$	12		—		$	12
	Short-term foreign exchange forward currency contracts	Accrued liabilities	$	(173	)	$	—	$	(173	)	$	—	$	(173	)
	Long-term foreign exchange forward currency contracts	Other long-term liabilities	$	(129	)	$	—	$	(129	)	$	—	$	(129	)
	Total derivative contracts, net		$	(1,416	)	$	—	$	(1,416	)	$	—	$	(1,416	)
			September 30, 2013
			Fair Value Measurements
	(In thousands)	Asset/(Liability)	Carrying			Level 1		Level 2			Level 3		Estimated
			Amount										Fair  Value
	Type of Contract	Balance Sheet Classification
	Short-term interest rate swaps	Accrued liabilities	$	(1,586	)	$	—	$	(1,586	)	$	—	$	(1,586	)
	Total derivative contracts, net		$	(1,586	)	$	—	$	(1,586	)	$	—	$	(1,586	)

Earnings_Per_Common_Share_Narr

Earnings Per Common Share - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Income	'	'	'	'
Basic earnings per share	$71,925	$89,981	$228,622	$248,331
Stock options	0	0	0	0
Restricted stock	0	0	0	0
Diluted earnings per share	$71,925	$89,981	$228,622	$248,331
Shares	'	'	'	'
Basic earnings per share (in shares)	64,309	65,062	64,204	65,441
Stock options (in shares)	216	304	250	367
Restricted stock (in shares)	535	492	569	372
Diluted earnings per share (in shares)	65,060	65,858	65,023	66,180
Per Share Amount	'	'	'	'
Basic earnings per share (in dollars per share)	$1.12	$1.38	$3.56	$3.79
Stock options (in dollars per share)	$0	$0	($0.01)	($0.02)
Restricted stock (in dollars per share)	($0.01)	($0.01)	($0.03)	($0.02)
Diluted earnings per share (in dollars per share)	$1.11	$1.37	$3.52	$3.75
Stock Options	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Outstanding stock options, excluded in the calculation of earnings per share	0	283	0	283

ShareBased_Compensation_Narrat

Share-Based Compensation - Narrative (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award	'
Weighted average recognition period	'1 year 10 months 13 days
Stock Options	'
Share-based Compensation Arrangement by Share-based Payment Award	'
Unrecognized compensation cost, stock options	1.7
Outstanding options, maximum term	'10 years
Stock Options | Minimum	'
Share-based Compensation Arrangement by Share-based Payment Award	'
Employee, vesting period	'1 year
Stock Options | Maximum	'
Share-based Compensation Arrangement by Share-based Payment Award	'
Employee, vesting period	'4 years
Restricted Stock	'
Share-based Compensation Arrangement by Share-based Payment Award	'
Unrecognized compensation cost, restricted stock awards	18.8
Restricted Stock | Minimum	'
Share-based Compensation Arrangement by Share-based Payment Award	'
Employee, vesting period	'3 years
Employee, restriction period	'3 years
Non-employee directors, award vesting period	'13 months
Non-employee directors, award recognition period	'13 months
Restricted Stock | Maximum	'
Share-based Compensation Arrangement by Share-based Payment Award	'
Employee, vesting period	'4 years
Employee, restriction period	'4 years

ShareBased_Compensation_Summar

Share-Based Compensation - Summary of Stock Option Activity (Details) (Stock Options, USD $)	9 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Stock Options	'	'
Number of Options:	'	'
Outstanding at October 1, 2013 (shares)	989	'
Granted (shares)	0	'
Exercised (shares)	-120	'
Forfeited (shares)	-30	'
Outstanding at June 30, 2014 (shares)	839	989
Exercisable at June 30, 2014 (shares)	666	'
Wtd. Avg. Exercise Price (in dollars per share):	'	'
Outstanding at October 1, 2013 (dollars per share)	$33.21	'
Granted (dollars per share)	$0	'
Exercised (dollars per share)	$29.39	'
Forfeited (dollars per share)	$40.24	'
Outstanding at June 30, 2014 (dollars per share)	$33.53	$33.21
Exercisable at June 30, 2014 (dollars per share)	$31.79	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'
Wtd. Avg. Remaining Contractual Life (Years)	'5 years 2 months 25 days	'5 years 10 months 24 days
Wtd. Avg. Remaining Contractual Life (Years), Exercisable at June 30, 2014	'4 years 9 months	'
Aggregate Intrinsic Value	$15,803	$21,592
Aggregate Intrinsic Value, Exercised	2,564	'
Aggregate Intrinsic Value, Exercisable at June 30, 2014	$13,787	'

ShareBased_Compensation_Summar1

Share-Based Compensation - Summary of Restricted Stock Activity (Details) (Restricted Stock, USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Restricted Stock	'
Number of Shares:	'
Unvested at October 1, 2013 (shares)	849
Granted (shares)	321
Vested (shares)	-161
Forfeited (shares)	-106
Unvested at June 30, 2014 (shares)	903
Wtd. Avg. Fair Value (in dollars per share):	'
Unvested at October 1, 2013 (dollars per share)	$42.42
Granted (dollars per share)	$54.01
Vested (dollars per share)	$38.94
Forfeited (dollars per share)	$45.44
Unvested at June 30, 2014 (dollars per share)	$52.48

Property_and_Equipment_Summary

Property and Equipment - Summary of Property and Equipment by Classification (Details) (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment	'	'
Cost	$4,151,294	$3,746,005
Less: Accumulated depreciation	-565,245	-581,281
Drilling and other property and equipment, net	3,586,049	3,164,724
Drilling vessels and equipment	'	'
Property, Plant and Equipment	'	'
Cost	3,552,698	2,979,503
Construction work in progress	'	'
Property, Plant and Equipment	'	'
Cost	535,372	715,320
Drill pipe	'	'
Property, Plant and Equipment	'	'
Cost	27,477	26,743
Office equipment and other	'	'
Property, Plant and Equipment	'	'
Cost	$35,747	$24,439

Property_and_Equipment_Narrati

Property and Equipment - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jan. 31, 2014	Apr. 30, 2014	Mar. 31, 2014	Jun. 30, 2014
					Construction in Progress, Newbuild Drilling Units	Standard Jackup Drilling Unit	Semisubmersible Tender Assist Drilling Rig	Semisubmersible Tender Assist Drilling Rig	Capital Addition Purchase Commitments
					drilling_unit				Construction in Progress, Newbuild Drilling Units
Property, Plant and Equipment	'	'	'	'	'	'	'	'	'
Interest capitalized	$6,700,000	$8,200,000	$22,900,000	$23,700,000	'	'	'	'	'
Expenditure towards construction of drilling units currently under construction	'	'	'	'	555,000,000	'	'	'	'
Number of drilling units	'	'	'	'	3	'	'	'	'
Commitments on drilling units under construction	'	'	'	'	'	'	'	'	1,200,000,000
Sales price	'	'	'	'	'	55,400,000	4,000,000	'	'
Carrying value of equipment and related inventory	'	'	'	'	'	$20,500,000	'	$2,000,000	'

LongTerm_Debt_Summary_of_LongT

Long-Term Debt - Summary of Long-Term Debt (Details) (USD $)	Jun. 30, 2014		Sep. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument	'		'
Long-term debt	$1,467,406		$1,263,232
Senior Notes | 6.5% Senior Notes	'		'
Debt Instrument	'		'
Long-term debt	657,406		658,232
Stated interest rate	6.50%		6.50%
Revolving Credit Facility | 2011 Revolving Credit Facility	'		'
Debt Instrument	'		'
Long-term debt	$810,000		$605,000
Market adjustable interest rate (per annum)	2.40%	[1]	3.00%	[1]
[1]	After the impact of our interest rate swaps.

LongTerm_Debt_Narrative_Detail

Long-Term Debt - Narrative (Details) (USD $)

9 Months Ended

1 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Apr. 09, 2014

Sep. 30, 2013

Jul. 31, 2014

Apr. 09, 2014

Apr. 09, 2014

Apr. 09, 2014

Apr. 10, 2014

Apr. 10, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

2011 Revolving Credit Facility

2011 Revolving Credit Facility

2011 Revolving Credit Facility

2011 Revolving Credit Facility

2011 Revolving Credit Facility

2011 Revolving Credit Facility

2011 Revolving Credit Facility

Restatement Agreement

Restatement Agreement

Restatement Agreement

Restatement Agreement

Restatement Agreement

Subsequent Event [Member]

Eurodollar

Eurodollar

Eurodollar

drilling_unit

Eurodollar

Eurodollar

Eurodollar

Minimum

Maximum

Minimum

Maximum

Line of Credit Facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding credit facility

'

'

$810,000,000

'

'

'

'

'

'

'

'

'

'

'

Outstanding letters of credit

'

'

8,200,000

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

'

1,100,000,000

'

'

'

'

'

'

1,550,000,000

'

'

'

Credit facility variable rate

'

'

'

'

'

'

'Eurodollar

'

'

'

'

'Eurodollar

'

'

Credit facility basis spread on variable rate

'

'

'

'

'

'

'

2.00%

2.50%

'

'

'

1.75%

2.00%

Commitment fee percentage

'

'

'

'

'

'

'

0.50%

1.00%

'

'

'

0.30%

0.40%

Market adjustable interest rate (per annum)

'

'

2.40%

[1]

'

3.00%

[1]

'

'

'

'

'

'

'

'

'

Proceeds from credit facility

$370,000,000

$400,000,000

'

'

'

$0

'

'

'

'

'

'

'

'

Debt Instrument, Collateral Pledged, Number Of Drilling Units

'

'

'

'

'

'

'

'

'

9

'

'

'

'

[1]

After the impact of our interest rate swaps.

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Narrative (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
	USD ($)	USD ($)	USD ($)	USD ($)	Cash Flow Hedging	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility
					Foreign currency forward exchange contracts	Cash Flow Hedging	Cash Flow Hedging	Restatement Agreement
					EUR (€)	Interest rate swap one	Interest rate swap two	Cash Flow Hedging
						USD ($)	USD ($)	Interest rate swap one
Derivative	'	'	'	'	'	'	'	'
Amount of hedged item	'	'	'	'	'	$250,000,000	$250,000,000	'
Interest rate fixed as result of interest rate swap hedges	'	'	'	'	'	3.40%	2.60%	2.90%
Exchange rate	'	'	'	'	1.3659	'	'	'
Notional amount	'	'	'	'	60,000,000	'	'	'
Gain (loss) on cash flow hedge ineffectiveness	0	0	0	0	'	'	'	'
Gain (loss) recognized in income as a result of excluding amounts from the assessment of hedge effectiveness or as a result of reclassifications to earnings following the discontinuance of any cash flow hedges	0	0	0	0	'	'	'	'
Interest rate derivative contracts that will be reclassified to earnings during the next twelve months	1,100,000	'	1,100,000	'	'	'	'	'
Foreign exchange forward currency contracts that will be reclassified to earnings during the next twelve months	$200,000	'	$200,000	'	'	'	'	'

Derivative_Financial_Instrumen3

Derivative Financial Instruments - Fair Value of Cash Flow Hedge Derivative Contracts Included in the Consolidated Balance Sheets (Details) (USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value	'	'
Asset Derivatives	$12	$0
Liability Derivatives	1,428	1,586
Designated as Hedging Instrument | Cash Flow Hedging	'	'
Derivatives, Fair Value	'	'
Asset Derivatives	12	0
Liability Derivatives	1,428	1,586
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swaps | Prepaid expenses and deferred costs	'	'
Derivatives, Fair Value	'	'
Asset Derivatives	0	0
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swaps | Deferred costs and other assets	'	'
Derivatives, Fair Value	'	'
Asset Derivatives	12	0
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swaps | Accrued liabilities	'	'
Derivatives, Fair Value	'	'
Liability Derivatives	1,126	1,586
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swaps | Other long-term liabilities	'	'
Derivatives, Fair Value	'	'
Liability Derivatives	0	0
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency forward exchange contracts | Prepaid expenses and deferred costs	'	'
Derivatives, Fair Value	'	'
Asset Derivatives	0	0
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency forward exchange contracts | Deferred costs and other assets	'	'
Derivatives, Fair Value	'	'
Asset Derivatives	0	0
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency forward exchange contracts | Accrued liabilities	'	'
Derivatives, Fair Value	'	'
Liability Derivatives	173	0
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency forward exchange contracts | Other long-term liabilities	'	'
Derivatives, Fair Value	'	'
Liability Derivatives	$129	$0

Derivative_Financial_Instrumen4

Derivative Financial Instruments - Gains and Losses on Cash Flow Hedge Derivative Contracts Included in the Consolidated Statement of Operations and the Statement of Comprehensive Income (Details) (Designated as Hedging Instrument, Cash Flow Hedging, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss)	'	'	'	'
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	$96	$51	($1,228)	$3
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	-363	-441	-1,284	-1,316
Interest expense, net of capitalized interest	'	'	'	'
Derivative Instruments, Gain (Loss)	'	'	'	'
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	-488	-441	-1,293	-1,316
Contract drilling revenues & costs	'	'	'	'
Derivative Instruments, Gain (Loss)	'	'	'	'
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	125	0	9	0
Interest rate swaps	'	'	'	'
Derivative Instruments, Gain (Loss)	'	'	'	'
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	-490	51	-926	3
Foreign currency forward exchange contracts	'	'	'	'
Derivative Instruments, Gain (Loss)	'	'	'	'
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	$586	$0	($302)	$0

Derivative_Financial_Instrumen5

Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) (USD $)	Jun. 30, 2014		Sep. 30, 2013
In Thousands, unless otherwise specified
Offsetting Derivative Assets	'		'
Derivative assets, Gross Amount Presented on the Consolidated Balance Sheets	$12		$0
Derivative assets, Netting Adjustments	-12	[1]	0	[1]
Derivative assets, Net Amount	0		0
Offsetting Derivative Liabilities	'		'
Derivative liabilities, Gross Amount Presented on the Consolidated Balance Sheets Fair Value, Gross Liability	-1,428		-1,586
Derivative liabilities, Netting Adjustments	12	[1]	0	[1]
Derivative liabilities, Net Amount	($1,416)		($1,586)
[1]	We have agreements in place with some of our financial trading counterparties that allow for the financial right of offset for derivative assets and derivative liabilities under the agreements.

Fair_Value_Narrative_Details

Fair Value - Narrative (Details) (USD $)	Jun. 30, 2014	Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Long-term debt, carrying value	$1,467,406,000	$1,263,232,000
Senior Notes | 6.5% Senior Notes	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Stated interest rate	6.50%	6.50%
Long-term debt, carrying value	657,406,000	658,232,000
Principal amount	650,000,000	'
Long-term debt, fair value	$697,100,000	'
Maximum	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Credit valuation adjustment to total fair value percentage (less than 1%)	1.00%	'

Fair_Value_Estimated_Fair_Valu

Fair Value - Estimated Fair Value of Financial Instruments (Details) (Fair Value, Measurements, Recurring, USD $)	Jun. 30, 2014	Sep. 30, 2013
In Thousands, unless otherwise specified
Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	$0	$0
Level 1 | Accrued liabilities | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	0
Level 1 | Accrued liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	'
Level 1 | Deferred costs and other assets | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	'
Level 1 | Other long-term liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	'
Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-1,416	-1,586
Level 2 | Accrued liabilities | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-1,126	-1,586
Level 2 | Accrued liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-173	'
Level 2 | Deferred costs and other assets | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	12	'
Level 2 | Other long-term liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-129	'
Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	0
Level 3 | Accrued liabilities | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	0
Level 3 | Accrued liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	'
Level 3 | Deferred costs and other assets | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	'
Level 3 | Other long-term liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	0	'
Estimated Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-1,416	-1,586
Estimated Fair Value | Accrued liabilities | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-1,126	-1,586
Estimated Fair Value | Accrued liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-173	'
Estimated Fair Value | Deferred costs and other assets | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	12	'
Estimated Fair Value | Other long-term liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-129	'
Carrying Amount	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-1,416	-1,586
Carrying Amount | Accrued liabilities | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-1,126	-1,586
Carrying Amount | Accrued liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	-173	'
Carrying Amount | Deferred costs and other assets | Interest rate swaps	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	12	'
Carrying Amount | Other long-term liabilities | Foreign currency forward exchange contracts	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	'	'
Derivative assets (liabilities), at fair value	($129)	'

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Contingency [Line Items]	'	'	'	'
Effective income tax rate	9.00%	14.00%	16.00%	13.00%
Statutory income tax rate	'	'	35.00%	'
Unrecognized tax benefits	$12	'	$12	'
Unrecognized tax benefits that would impact the effective tax rate	12	'	12	'
Other long-term liabilities	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Estimated accrued interest and penalties	$3.20	'	$3.20	'

Capital_Stock_Details

Capital Stock (Details) (USD $)	Jun. 30, 2014	Feb. 19, 2014	Feb. 18, 2014	Sep. 30, 2013
Equity [Abstract]	'	'	'	'
Common stock, shares authorized	180,000,000	180,000,000	90,000,000	90,000,000
Shares authorized	181,000,000	'	'	'
Common stock, par value (in dollars per share)	$1	'	'	$1
Preferred stock, shares authorized	1,000,000	'	'	1,000,000

Commitments_And_Contingencies_

Commitments And Contingencies - Narrative (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Loss Contingencies	'
Long-term other receivable related to service taxes	$11.80
Indian Tax Authority	'
Loss Contingencies	'
Service taxes paid	10.5
Accrued additional service tax	1.3
Total service taxes	$11.80