v3.20.4

Debt - 2019 Cash Convertible Senior Notes (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 02, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |
Repayments of Convertible Debt |  | $ 0 | $ 1,150 | $ 0
Two Thousand Nineteen Cash Convertible Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayments of Convertible Debt | $ 1,150 |  |  |
Private Placement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 11,180 |  |
Exercise price of warrants (in dollars per share) |  | $ 133.32 |  |

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