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Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 09, 2020 | Mar. 18, 2019 | Feb. 14, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Feb. 01, 2019
Debt |  |  |  |  |  |  |  |  |  |
Finance leases |  |  |  |  | $ 1,000,000 |  | $ 1,000,000 |  | $ 2,000,000 |
Total debt |  |  |  |  | 7,857,000,000 |  | 7,857,000,000 |  | 7,853,000,000 |
Less: total current maturities |  |  |  |  | 2,000,000 |  | 2,000,000 |  | 2,000,000 |
Less: total deferred financing costs for Notes |  |  |  |  | 10,000,000 |  | 10,000,000 |  | 9,000,000 |
Total long-term debt |  |  |  |  | 7,845,000,000 |  | 7,845,000,000 |  | 7,842,000,000 |
Loss on extinguishment of debt |  |  |  |  | 40,000,000 | $ 56,000,000 | 40,000,000 | $ 57,000,000 |  |
Proceeds from sale of capped call security |  |  |  | $ 3,000,000 |  |  | 0 | $ 3,000,000 |  |
Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | 0 |  | 0 |  |  |
Carrying value |  |  |  |  | $ 0 |  | $ 0 |  | $ 0 |
Credit facility, unused capacity, commitment fee percentage |  |  |  |  |  |  | 0.25% |  |  |
Senior Notes | 1.75% Senior Notes Due 2020 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 1.75% |  | 1.75% |  | 1.75% |
Principal amount |  |  |  |  | $ 1,000,000 |  | $ 1,000,000 |  |  |
Carrying value |  |  |  |  | $ 1,000,000 |  | 1,000,000 |  | $ 1,000,000 |
Loss on extinguishment of debt |  |  |  |  |  |  | $ 1,000,000 |  |  |
Senior Notes | 3.875% Senior Notes Due 2022 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 3.875% |  | 3.875% |  |  |
Principal amount |  |  |  |  | $ 1,000,000,000 |  | $ 1,000,000,000 |  |  |
Carrying value |  |  |  |  | $ 997,000,000 |  | $ 997,000,000 |  | 995,000,000 |
Senior Notes | 4.625% Senior Notes Due 2023 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.625% |  |  |  | 4.625% |  | 4.625% |  |  |
Principal amount | $ 500,000,000 |  |  |  | $ 0 |  | $ 0 |  |  |
Carrying value |  |  |  |  | $ 0 |  | $ 0 |  | $ 498,000,000 |
Extinguishment of debt | $ 507,000,000 |  |  |  |  |  |  |  |  |
Senior Notes | 1.75% Senior Notes Due 2023 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 1.75% |  | 1.75% |  | 1.75% |
Principal amount |  |  |  |  | $ 193,000,000 |  | $ 193,000,000 |  |  |
Carrying value |  |  |  |  | $ 168,000,000 |  | $ 168,000,000 |  | $ 163,000,000 |
Senior Notes | 4.625% Senior Notes Due 2024 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 4.625% |  | 4.625% |  |  |
Principal amount |  |  |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |  |
Carrying value |  |  |  |  | $ 1,487,000,000 |  | $ 1,487,000,000 |  | 1,485,000,000 |
Senior Notes | 5.375% Senior Notes Due 2025 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 5.375% |  |  |  | 5.375% |  | 5.375% |  |  |
Principal amount | $ 1,000,000,000 |  |  |  | $ 0 |  | $ 0 |  |  |
Carrying value |  |  |  |  | $ 0 |  | $ 0 |  | 993,000,000 |
Extinguishment of debt | $ 1,039,000,000 |  |  |  |  |  |  |  |  |
Senior Notes | 5.375% Senior Notes Due 2026 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 5.375% |  | 5.375% |  |  |
Principal amount |  |  |  |  | $ 1,000,000,000 |  | $ 1,000,000,000 |  |  |
Carrying value |  |  |  |  | $ 993,000,000 |  | $ 993,000,000 |  | 992,000,000 |
Senior Notes | 5.00% Senior Notes Due 2027 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 5.00% |  | 5.00% |  |  |
Principal amount |  |  |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |  |
Carrying value |  |  |  |  | $ 1,489,000,000 |  | $ 1,489,000,000 |  | 1,488,000,000 |
Senior Notes | 5.500% Senior Notes Due 2029 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 5.50% |  | 5.50% |  |  |
Principal amount |  |  |  |  | $ 1,250,000,000 |  | $ 1,250,000,000 |  |  |
Carrying value |  |  |  |  | $ 1,237,000,000 |  | $ 1,237,000,000 |  | 1,236,000,000 |
Senior Notes | 4.125% Senior Notes Due 2030 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.125% |  |  |  | 4.125% |  | 4.125% |  |  |
Principal amount |  |  |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |  |
Carrying value |  |  |  |  | 1,484,000,000 |  | 1,484,000,000 |  | $ 0 |
Loss on extinguishment of debt |  |  |  |  | 40,000,000 |  | 40,000,000 |  |  |
Line of Credit | Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Line of credit facility |  |  |  |  | $ 1,750,000,000 |  | $ 1,750,000,000 |  |  |
Pandora | Senior Notes | 1.75% Senior Notes Due 2020 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  | 1.75% |  | 1.75% |  | 1.75% |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  | $ 152,000,000
Debt instrument redemption price (as a percent of aggregate principal) |  |  | 100.00% |  |  |  |  |  |  |
Pandora | Senior Notes | 1.75% Senior Notes Due 2023 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  | $ 193,000,000
Pandora | Senior Notes | 1.75% Senior Notes Due 2020 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Extinguishment of debt |  | $ 151,000,000 |  |  |  |  |  |  |  |
Pandora |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  | $ 1,000,000 |  | $ 1,000,000 |  |  |

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