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Guarantee Of Registered Securities (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Guarantor Obligations [Line Items] |  |
Senior notes aggregate outstanding principal balance | $ 422.9 |
6.875% Senior notes due 2020(2) |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 6.875% | 6.875%
Senior note, maturity year | 2020 |
7.875% Senior notes due 2040 |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 7.875% | 7.875%
Senior note, maturity year | 2040 |
7.20% Debentures Due 2027 |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 7.20% |
Senior note, maturity year | 2027 |
Senior notes aggregate outstanding principal balance | $ 150.0 |
Pride International Inc and Ensco International Inc [Member] |  |
Guarantor Obligations [Line Items] |  |
Subsidiary, ownership percentage by parent | 100.00% |

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- Definition Contractual interest rate for funds borrowed, under the debt 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -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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