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v3.8.0.1

Long-Term Debt - Outstanding Long-Term Debt- Supplemental Information (Detail) | 3 Months Ended
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Mar. 31, 2018
9.08% bond, due June 1, 2022 [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 9.08%
Debt instrument, maturity date | Jun. 01, 2022
5.50% note, due October 12, 2020 [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 5.50%
Debt instrument, maturity date | Oct. 12, 2020
5.93% note, due October 31, 2023 [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 5.93%
Debt instrument, maturity date | Oct. 31, 2023
5.68% note, due June 30, 2026 [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 5.68%
Debt instrument, maturity date | Jun. 30, 2026
Uncollateralized Senior Notes Due On May Two Thousand Twenty Eight [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 6.43%
Debt instrument, maturity date | May 02, 2028
Uncollateralized Senior Note Two Due on December Two Thousand Twenty Eight [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 3.73%
Debt instrument, maturity date | Dec. 16, 2028
Uncollateralized Senior Notes Due On Two Thousand Twenty Nine [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 3.88%
Debt instrument, maturity date | May 15, 2029
Uncollateralized Senior Note Due on Two Thousand Thirty Two [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 3.25%
Debt instrument, maturity date | Apr. 30, 2032
Revolving Credit Facility [Member] |
Debt Instrument [Line Items] |
Long-term debt, interest percentage | 2.88%
Debt instrument, maturity date | Oct. 08, 2020

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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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + 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)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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