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Supplemental Guarantor Condensed Consolidating Financial Statements Narrative (Details) | Sep. 30, 2017
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Debt Instrument [Line Items] |
Ownership in Subsidiary, Percentage | 100.00%
Unsecured Debt [Member] | 7.75% Notes [Member] |
Debt Instrument [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 7.75%
Unsecured Debt [Member] | 6.625% Notes [Member] |
Debt Instrument [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 6.625%
Unsecured Debt [Member] | 6.50% Notes due 2027 [Member] |
Debt Instrument [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 6.50%
Unsecured Debt [Member] | 6.25% Notes due 2025 [Member] |
Debt Instrument [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 6.25%
Unsecured Debt [Member] | 6.25% Notes Due 2021 [Member] |
Debt Instrument [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 6.25%
Unsecured Debt [Member] | 5.125% Notes [Member] |
Debt Instrument [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 5.125%

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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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