Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAggregateFixedIncomeSecuritiesRangeMaximum
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Target allocation minimum percentage of investments in aggregate fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAggregateFixedIncomeSecuritiesRangeMinimum
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Target allocation maximum percentage of investments in cash and equivalents to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

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Target allocation minimum percentage of investments in cash and equivalents to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsCashAndEquivalentsRangeMinimum
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Data Type:	num:percentItemType
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Target allocation maximum percentage of investments in core plus fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsCorePlusFixedIncomeSecuritiesRangeMaximum
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Target allocation minimum percentage of investments in core plus fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsCorePlusFixedIncomeSecuritiesRangeMinimum
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Target allocation maximum percentage of investments in fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsFixedIncomeSecuritiesRangeMaximum
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Data Type:	num:percentItemType
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Target allocation minimum percentage of investments in fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsFixedIncomeSecuritiesRangeMinimum
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Data Type:	num:percentItemType
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Target allocation minimum percentage of investments in Non US small cap to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsNonUsSmallCapRangeMinimum
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Target allocation maximum percentage of investments in Non US small cap securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsNon-UsSmallCapSecuritiesRangeMaximum
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Data Type:	num:percentItemType
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Target allocation maximum percentage of investments in real estate fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsRealEstateFixedIncomeSecuritiesRangeMaximum
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Target allocation minimum percentage of investments in real estate fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsRealEstateFixedIncomeSecuritiesRangeMinimum
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Target allocation maximum percentage of investments in S and P 500 Stock Index equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

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Target allocation minimum percentage of investments in S and P 500 Stock Index equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsSAndP500StockIndexEquitySecuritiesRangeMinimum
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Target allocation maximum percentage of investments in small cap equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

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Target allocation minimum percentage of investments in small cap equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	rdc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsSmallCapEquitySecuritiesRangeMinimum
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Target allocation maximum percentage of investments in other assets to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

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Target allocation minimum percentage of investments in other assets to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis of non US.

No definition available.

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis of non US.

No definition available.

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Data Type:	num:percentItemType
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This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value.

No definition available.

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Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

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-Publisher FASB

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The amount of the cost recognized during the period for defined contribution plans.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

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Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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