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Debt (Tables)
12 Months Ended
Dec. 31, 2022
Convertible Notes Payable [Abstract]  
Convertible Debt
The following table summarizes the carrying value of our outstanding debt (in millions), net of unamortized debt discount and issuance costs of $14 million and $18 million at December 31, 2022 and 2021, respectively:

December 31, 2022December 31, 2021
2030 Notes2022 Notes2030 Notes2022 Notes
Current, net$— $— $— $92 
Long-term, net1,486 — 1,484 — 
Total debt$1,486 $— $1,484 $92 
Convertible DateInitial Conversion Price per ShareInitial Conversion Rate per $1,000 Par ValueInitial Number of Shares
(in millions)
2022 NotesFebruary 1, 2022$134.75 7.42 shares
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments The estimated fair value of the 2030 Notes at December 31, 2022, and the 2022 Notes and 2030 Notes at December 31, 2021 is based on the closing trading price per $100 of the 2030 Notes and 2022 Notes as follows (in millions):
December 31, 2022December 31, 2021
2022 Notes$— $440 
2030 Notes$1,144 $1,400 
Schedule of Note Hedge Transactions
PurchaseInitial SharesShares as of
December 31, 2022
(in millions)
2022 Note Hedge$128 — 
Schedule of Warrants
ProceedsInitial SharesStrike PriceFirst Expiration DateShares as of
December 31, 2022
(in millions)(in millions)(in millions)
2022 Warrants$54 $203.40 September 1, 2022—