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Long-Term Debt - Outstanding Long-Term Debt- Supplemental Information (Detail) | 9 Months Ended
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Sep. 30, 2020
9.08% bond, due June 1, 2022 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Jun. 01, 2022
Debt Instrument, Interest Rate, Stated Percentage | 9.08%
5.50% note, due October 12, 2020 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Oct. 12, 2020
Debt Instrument, Interest Rate, Stated Percentage | 5.50%
5.93% note, due October 31, 2023 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Oct. 31, 2023
Debt Instrument, Interest Rate, Stated Percentage | 5.93%
5.68% note, due June 30, 2026 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Jun. 30, 2026
Debt Instrument, Interest Rate, Stated Percentage | 5.68%
6.43% note, due May 2, 2028 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | May 02, 2028
Debt Instrument, Interest Rate, Stated Percentage | 6.43%
3.73% note, due December 16, 2028 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Dec. 16, 2028
Debt Instrument, Interest Rate, Stated Percentage | 3.73%
3.88% note, due May 15, 2029 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | May 15, 2029
Debt Instrument, Interest Rate, Stated Percentage | 3.88%
3.25% due April 30, 2032 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Apr. 30, 2032
Debt Instrument, Interest Rate, Stated Percentage | 3.25%
3.48% note, due May 31, 2038 [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | May 31, 2038
Debt Instrument, Interest Rate, Stated Percentage | 3.48%
Uncollateralized Senior Note Due November Two Thousand Thirty Eight [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Nov. 30, 2038
Debt Instrument, Interest Rate, Stated Percentage | 3.58%
Uncollateralized Senior Note Due August Two Thousand Thirty Nine [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Aug. 20, 2039
Debt Instrument, Interest Rate, Stated Percentage | 3.98%
Uncollateralized Senior Note Due December Two Thousand Thirty Four [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Dec. 20, 2034
Debt Instrument, Interest Rate, Stated Percentage | 2.98%
Uncollateralized Senior Note Due July Two Thousand Thirty Five |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Jul. 15, 2035
Debt Instrument, Interest Rate, Stated Percentage | 3.00%
Uncollateralized Senior Note Due August Two Thousand Thirty Five |
Debt Instrument [Line Items] |
Debt instrument, maturity date | Aug. 15, 2035
Debt Instrument, Interest Rate, Stated Percentage | 2.96%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 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/disclosureRef -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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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