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v2.4.0.6

Long-Term Debt And Notes Payable (Components Of Debt) (Parenthetical) (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
5.50% Notes Due 2013 |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 5.50% | 5.50%
Debt instrument maturity year | 2013 | 2013
6.55% Notes Due 2036 |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 6.55% | 6.55%
Debt instrument maturity year | 2036 | 2036

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- Definition Maturity Year of Debt Instrument + References No definition available. + Details
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- Definition Interest rate stated in the contractual 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
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- Details
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