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Long-term Debt - Senior Notes Redemption Prices (Details) - Senior Notes | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2019
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  |  | 101.00%
5.125% Senior Notes due 2023 | Redemption Period Two |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  | 102.563% |
5.125% Senior Notes due 2023 | Redemption Period Three |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  | 101.281% |
5.125% Senior Notes due 2023 | Redemption Period Four |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  | 100.00% |
5.75% Senior Notes due 2024 |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) | 100.958% |  | 101.917% |  |  |
5.75% Senior Notes due 2024 | Redemption Period Three |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  |  | 100.958%
5.75% Senior Notes due 2024 | Redemption Period Four |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  |  | 100.00%
5.75% Senior Notes due 2025 | Redemption Period One |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  | 102.875% |  |
5.75% Senior Notes due 2025 | Redemption Period Two |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  | 101.917% |  |
5.75% Senior Notes due 2025 | Redemption Period Three |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  | 100.958% |  |
5.75% Senior Notes due 2025 | Redemption Period Four |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  |  |  | 100.00% |  |
4.50% Senior Notes due 2028 |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 4.70% |  |  |  |
4.50% Senior Notes due 2028 | Redemption Period One |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 102.25% |  |  |  |
4.50% Senior Notes due 2028 | Redemption Period Two |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 101.125% |  |  |  |
4.50% Senior Notes due 2028 | Redemption Period Three |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 100.00% |  |  |  |
4.75% Senior Notes due 2030 |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 5.00% |  |  |  |
4.75% Senior Notes due 2030 | Redemption Period One |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 102.375% |  |  |  |
4.75% Senior Notes due 2030 | Redemption Period Two |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 101.583% |  |  |  |
4.75% Senior Notes due 2030 | Redemption Period Three |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 100.792% |  |  |  |
4.75% Senior Notes due 2030 | Redemption Period Four |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |
Redemption price, (percent) |  | 100.00% |  |  |  |

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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