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Debt
 12 Months Ended
Dec. 31, 2022
Convertible Notes Payable [Abstract]  
Debt 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 

We consider the fair value of the 2030 Notes at December 31, 2022, and the 2022 Notes and 2030 Notes at December 31, 2021 to be a Level 2 measurement. 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 

2030 Notes

In August 2020, we issued 1.40% fixed rate ten-year notes with an aggregate principal amount of $1.5 billion due on September 1, 2030 (the “2030 Notes”). The 2030 Notes were issued at 99.63% of principal and we incurred approximately $13 million for debt issuance costs. The effective interest rate for the 2030 Notes was 1.53%, including coupon interest, amortization of debt issuance costs and amortization of the debt discount. Interest is payable semi-annually in arrears on March 1 and September 1 of each year, beginning on March 1, 2021, and the entire outstanding principal amount is due at maturity on September 1, 2030. The 2030 Notes are unsecured obligations and the indentures governing the 2030 Notes contain customary events of default and covenants that, among others and subject to exceptions, restrict the Company’s ability to incur or guarantee debt secured by liens on specified assets or enter into sale and lease-back transactions with respect to specified properties.
2022 Notes

In May and June 2017, we issued an aggregate of $782.5 million of 0% convertible senior notes (the “2022 Notes”), which were due June 1, 2022 unless earlier converted or repurchased in accordance with their terms. The 2022 Notes did not bear interest, and we could not redeem the 2022 Notes prior to maturity. The 2022 Notes were unsecured obligations and did not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by us or any of our subsidiaries.

As described in Note 2, we adopted the new accounting standard for debt with conversion options effective January 1, 2022 using a modified retrospective method, under which financial results reported in prior periods were not adjusted. Prior to the adoption of the new standard, in accounting for the issuance of the 2022 Notes and the related transaction costs, we valued and bifurcated the conversion option from the host debt instrument, referred to as debt discount, and recorded the conversion option of $160 million in equity at issuance. The resulting debt discount and transaction costs allocated to the liability component were amortized to interest expense using the effective interest method over the term of the 2022 Notes. Upon adoption of the new accounting standard on January 1, 2022, we recombined the liability and equity components of the 2022 Notes, including the related issuance costs, assuming the instrument was accounted for as a single liability from inception to the date of adoption. Issuance costs were presented as a deduction from the outstanding principal balance of the 2022 Notes and amortized to interest expense using the effective interest method over the term of the 2022 Notes.
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 shares6 

Conversion of the 2022 Notes. On or after February 1, 2022 (the “Convertible Date”), a holder was able to convert all or any portion of its 2022 Notes at any time prior to the close of business on the second scheduled trading day immediately preceding maturity, and such conversions were settled on the maturity date.

Prior to the Convertible Date, holders of the 2022 Notes could convert their 2022 Notes at their option if, during any calendar quarter the last reported sale price of our common stock for at least 20 trading days during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day (in each case, the “Conversion Condition”).

The Conversion Condition for the 2022 Notes was met for all the quarters ended June 30, 2018 through December 31, 2021, except for the quarter ended December 31, 2018. Therefore, our 2022 Notes became convertible at the holders’ option beginning on July 1, 2018 through January 31, 2022, except for the quarter ended March 31, 2019 because the Conversion Condition for the 2022 Notes was not met for the quarter ended December 31, 2018.

During the year ended December 31, 2022, we paid cash to settle $94 million in principal of the 2022 Notes, which was comprised of early conversions of $6 million and the remaining principal of $88 million for the final settlement on June 1, 2022, the maturity date of our 2022 Notes. As a result of the settlements, we also recorded a net reduction to additional paid-in capital of $212 million offset by $212 million benefit from the 2022 Note Hedge (as defined below).
Repurchase of 2022 Notes

On August 11, 2020, we repurchased $497 million in aggregate principal amount of the 2022 Notes (the “2022 Notes Repurchase”) funded in part by the $1.1 billion proceeds received from the partial unwind of the 2022 Note Hedge (as defined below). The 2022 Notes Repurchase was accounted for as a debt extinguishment in which $493 million and $1.1 billion were allocated to the liability and equity components of the 2022 Notes, respectively. The cash consideration allocated to the liability component was based on the estimated fair value of the liability component utilizing a discount rate assuming a similar liability per the Company’s credit rating with the same maturity, but without the conversion option, as of the repurchase date. The cash consideration allocated to the equity component was based on the aggregate cash consideration less the estimated fair value of the liability component. The loss on extinguishment of $39 million recorded as other income (expense), net, represents the difference between the allocated cash consideration and the carrying value of the liability component, which includes the proportionate amounts of unamortized debt discount and unamortized debt issuance costs in the amount of $43 million.

Note Hedge

To minimize the impact of potential economic dilution upon conversion of the 2022 Notes, we entered into convertible note hedge transactions (the “2022 Note Hedge”) with certain investment banks, with respect to our common stock concurrently with the issuance of the 2022 Notes.
PurchaseInitial SharesShares as of
December 31, 2022
(in millions)
2022 Note Hedge$128 6 — 

The 2022 Note Hedge covered shares of our common stock at a strike price per share that corresponded to the initial conversion price of the 2022 Notes, subject to adjustment, and were exercisable upon conversion of the 2022 Notes. The 2022 Note Hedge expired upon the maturity of the 2022 Notes and since the quarter ended June 30, 2022, the 2022 Note Hedge is no longer outstanding. The 2022 Note Hedge was intended to reduce the potential economic dilution upon conversion of the 2022 Notes in the event that the fair value per share of our common stock at the time of exercise is greater than the conversion price of the 2022 Notes. The 2022 Note Hedge was a separate transaction and was not part of the terms of the 2022 Notes. Holders of the 2022 Notes did not have any rights with respect to the 2022 Note Hedge. The 2022 Note Hedge did not impact earnings per share, as it was entered into to offset any dilution from the 2022 Notes.

On August 11, 2020, in connection with the 2022 Notes Repurchase, we entered into partial unwind agreements (the “Note Hedge Unwind”) to reduce the number of options corresponding to the principal amount of the 2022 Notes Repurchase. We received $1.1 billion for the Note Hedge Unwind and the aggregate number of shares underlying the call options under the 2022 Note Hedge was reduced by 3.7 million shares. Consistent with early conversions of the 2022 Notes, proceeds received by the Company from the Note Hedge Unwind were used to settle a portion of the 2022 Notes Repurchase.

Warrants
ProceedsInitial SharesStrike PriceFirst Expiration DateShares as of
December 31, 2022
(in millions)(in millions)(in millions)
2022 Warrants$54 6 $203.40 September 1, 2022— 

Separately, we entered into warrant transactions with certain investment banks, whereby we sold warrants to acquire, subject to adjustment, the number of shares of our common stock shown in the table above (the “2022 Warrants”). If the average market value per share of our common stock for the reporting period, as measured under the 2022 Warrants, exceeded the strike price of the respective 2022 Warrants, such 2022 Warrants would have a dilutive effect on our earnings per share to the extent we report net income. The 2022 Warrants were separate transactions and were not remeasured through earnings each reporting period. The 2022 Warrants were not part of the 2022 Notes or 2022 Note Hedge.

In connection with the 2022 Notes Repurchase and early note conversions, we entered into partial unwind agreements to reduce the number of warrants outstanding under the 2022 Warrants by delivering an aggregate of 0.5 million shares of our common stock during the year ended December 31, 2021.
During the quarter ended June 30, 2022. we entered into unwind agreements to settle the remaining portion of the 2022 Warrants by delivering an aggregate of 0.6 million shares of our common stock. Accordingly, the 2022 Warrants were no longer outstanding as of June 30, 2022.