v3.19.3

Long-Term Debt and Revolving Credit Arrangements - Components of Debt (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018 | Jun. 13, 2018 | Dec. 31, 2015
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 5,797 | $ 7,491 |  |
Less: unamortized discount and issuance costs | (59) | (595) |  |
Less: current portion of long-term debt | (27) | (27) |  |
Long-term debt, net of current portion | 5,711 | 6,869 |  |
Secured Loans | 2016 Senior Secured Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 1,116 | 1,124 |  |
Effective Interest Rate | 6.10% |  | 6.10% |
Secured Loans | 2018 Senior Secured Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 1,481 | 1,493 |  |
Effective Interest Rate | 6.20% |  |  |
Convertible Notes | 2021 Convertible Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 0 | 1,844 |  |
Effective Interest Rate | 23.50% |  |  | 23.50%
Convertible Notes | 2022 Convertible Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 0 | 1,030 |  |
Effective Interest Rate | 13.70% |  |  |
Senior Note | 2023 Senior Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 500 | 500 |  |
Effective Interest Rate | 7.70% |  |  |
Senior Note | 2026 Senior Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 1,500 | 1,500 |  |
Effective Interest Rate | 8.10% |  |  |
Senior Note | 2027 Senior Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 1,200 | $ 0 |  |
Effective Interest Rate | 7.70% |  |  |

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