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Derivative Instruments and Hedging Activities - Commitment of Cross Currency Swaps (Parenthetical) (Detail) (NOK) In Millions, unless otherwise specified | Jun. 30, 2013 | Jan. 31, 2013
--- | --- | ---
Derivative [Line Items] |  |
Repurchase of bond |  | 388.5
Bond issue, original value | 600 |
Fixed Rate Payable [Member] | Cross Currency Swap One [Member] |  |
Derivative [Line Items] |  |
LIBOR fixed | 1.10% |
LIBOR rate receivable cap | 3.50% |

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- 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=6584090&loc=d3e28878-108400 + Details
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Balance Type: | credit
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- Definition Fair value amount of debt instrument that was repurchased. + References No definition available. + Details
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Balance Type: | debit
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- Definition Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Details
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