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Short And Long-Term Debt Senior Secured Second Lien Notes (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-term Debt, Gross | $ 3,391 |
7.625% Senior Secured Second Lien Notes | Secured Debt |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Gross | $ 550 | $ 0
Interest Rate | 7.625% |
9.375% Senior Notes | Senior Notes |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Gross | $ 550 | $ 550
Interest Rate | 9.375% |

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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=120391452&loc=d3e13212-122682 + Details
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