Debt Instrument, Consolidated Debt to Total Capitalization Ratio

No definition available.

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Period Type:	duration

- Definition

Represents debt instrument issue amount as a percentage of principal during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	rdc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to debt instrument redemption amount as a percentage of principal.

+ References

No definition available.

+ Details

Name:	rdc_DebtInstrumentRedemptionAmountAsPercentageOfPrincipal
Namespace Prefix:	rdc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Restrictive provisions in the entities debt agreements require the entity to maintain a minimum level of shareholders' equity equal to no less than the book value of outstanding debt.

+ References

No definition available.

+ Details

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- Definition

Subsidiary, Ownership Percentage by Parent

+ References

No definition available.

+ Details

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiaryIssuerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
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Period Type:

LONG-TERM DEBT (Details) (USD $)	12 Months Ended	0 Months Ended
LONG-TERM DEBT (Details) (USD $)	Dec. 31, 2014	Jan. 15, 2014	Jan. 23, 2014	Sep. 26, 2010	Dec. 31, 2013
Debt Instrument [Line Items]
Borrowing capacity under the revolving credit facility			$ 1,000,000,000.0	$ 750,000,000
Minimum percentage of shareholders equity	60.00%
Consolidated debt to total capitalization ratio	37.00%
RCI [Member]
Debt Instrument [Line Items]
Subsidiary ownership percentage by parent		100.00%
Net proceeds from issuance of debt		792,000,000
RCI [Member] \| 4.75% Senior Notes, due January 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate		4.75%
Aggregate principal amount		400,000,000
Issue amount as percentage of principal		99.898%
RCI [Member] \| 5.85% Senior Notes, due January 2044 [Member]
Debt Instrument [Line Items]
Stated interest rate		5.85%
Aggregate principal amount		400,000,000
Issue amount as percentage of principal		99.972%
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	2,807,324,000				2,008,700,000
Redemption amount as percentage of principal	100.00%
Unsecured Debt [Member] \| 5% Senior Notes, due September 2017 [Member]
Debt Instrument [Line Items]
Total long-term debt	399,244,000				398,961,000
Effective interest rate	5.10%
Stated interest rate	5.00%
Aggregate principal amount	400,000,000
Unsecured Debt [Member] \| 7.875 % Senior Notes, due August 2019 [Member]
Debt Instrument [Line Items]
Total long-term debt	498,500,000				498,171,000
Effective interest rate	8.00%
Stated interest rate	7.875%
Aggregate principal amount	500,000,000
Unsecured Debt [Member] \| 4.875% Senior Notes, due June 2022 [Member]
Debt Instrument [Line Items]
Total long-term debt	711,640,000				713,208,000
Effective interest rate	4.60%
Stated interest rate	4.875%
Aggregate principal amount	700,000,000
Unsecured Debt [Member] \| 4.75% Senior Notes, due January 2024 [Member]
Debt Instrument [Line Items]
Total long-term debt	399,631,000				0
Effective interest rate	4.80%
Aggregate principal amount	400,000,000
Unsecured Debt [Member] \| 5.4% Senior Notes, due December 2042 [Member]
Debt Instrument [Line Items]
Total long-term debt	398,417,000				398,360,000
Effective interest rate	5.40%
Stated interest rate	5.40%
Aggregate principal amount	400,000,000
Unsecured Debt [Member] \| 5.85% Senior Notes, due January 2044 [Member]
Debt Instrument [Line Items]
Total long-term debt	399,892,000				0
Effective interest rate	5.90%
Aggregate principal amount	400,000,000