Face (par) amount of debt instrument in which a tender offer is made.

No definition available.

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Namespace Prefix:	rdc_
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 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: 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=64930785&loc=d3e28551-108399

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- 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

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
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- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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Balance Type:
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Other Financial Statement Disclosures - Long Term Debt, Narrative (Details) - USD ($)			1 Months Ended			3 Months Ended			6 Months Ended
	Feb. 08, 2017	Jan. 03, 2017	Jul. 31, 2017	Dec. 31, 2016	Apr. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jan. 09, 2017
Debt Instrument [Line Items]
Letters of credit issued						$ 15,100,000			$ 15,100,000
Gain on extinguishment of debt						$ 2,400,000	$ 1,800,000		$ 2,200,000	$ 2,400,000
Subject Notes [Member]
Debt Instrument [Line Items]
Early repayment of debt		$ 32,800,000
Aggregate amount of debt paid		34,600,000		$ 463,900,000
Debt instrument, face amount of tender offer				$ 750,000,000
Subject Notes [Member] \| 5% Senior Notes due September 2017 and 7.875% Senior Notes due August 2019 [Member]
Debt Instrument [Line Items]
Early repayment of debt					$ 20,100,000			$ 15,800,000
Gain on extinguishment of debt							1,200,000	600,000
Subject Notes [Member] \| 5% Senior Notes due September 2017 and 7.875% Senior Notes due August 2019, First Extinguishment [Member]
Debt Instrument [Line Items]
Aggregate amount of debt paid								16,500,000
Subject Notes [Member] \| 5% Senior Notes due September 2017 and 7.875% Senior Notes due August 2019, Second Extinguishment [Member]
Debt Instrument [Line Items]
Aggregate amount of debt paid								$ 21,400,000
Subject Notes [Member] \| 5% Senior Notes, due September 2017 [Member]
Debt Instrument [Line Items]
Early repayment of debt	$ 94,000,000
Aggregate amount of debt paid		100,000
Stated interest rate percentage				5.00%		5.00%		5.00%	5.00%
Principal amount				$ 92,200,000.0							$ 92,100,000.0
Subject Notes [Member] \| 7.875% Senior Notes, due August 2019 [Member]
Debt Instrument [Line Items]
Early repayment of debt					9,400,000
Aggregate amount of debt paid		900,000			$ 10,000,000
Stated interest rate percentage				7.875%		7.875%		7.875%	7.875%
Gain on extinguishment of debt							$ 600,000
Principal amount				$ 209,800,000.0		$ 207,900,000.0			$ 207,900,000.0
Subject Notes [Member] \| 7.875% Senior Notes, due August 2019 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Early repayment of debt			$ 7,000,000
Aggregate amount of debt paid			$ 6,500,000
Subject Notes [Member] \| 4.875% Senior Notes, due June 2022 [Member]
Debt Instrument [Line Items]
Early repayment of debt						33,500,000
Aggregate amount of debt paid		$ 33,600,000				$ 35,800,000
Stated interest rate percentage				4.875%		4.875%			4.875%
Gain on extinguishment of debt						$ 2,400,000
Principal amount				$ 690,200,000.0		620,800,000.0			$ 620,800,000.0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Amounts outstanding under credit facility						0			0
Letters of credit issued						5,100,000			5,100,000
Remaining availability under credit facility						1,495,000,000			1,495,000,000
Period 1 [Member]
Debt Instrument [Line Items]
Availability under Revolving Credit Facility						1,500,000,000			1,500,000,000
Period 2 [Member]
Debt Instrument [Line Items]
Availability under Revolving Credit Facility						1,440,000,000.00			1,440,000,000.00
Period 3 [Member]
Debt Instrument [Line Items]
Availability under Revolving Credit Facility						$ 1,290,000,000.00			$ 1,290,000,000.00