Stock-based Compensation	6 Months Ended
Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation	Note 5 – Stock-based Compensation We granted restricted stock units (“RSUs”) in July 2019 to certain members of management, pursuant to retention agreements entered into with these employees (the “IPO Grants”). These RSUs vest upon satisfaction of both a performance-based vesting condition (the “IPO Condition”) and a service-based vesting condition (the “Service Condition”). The IPO Condition was satisfied when we completed our IPO on February 4, 2020. The Service Condition will be satisfied with respect to one-third of an employee’s RSUs on each anniversary from the date of our IPO for three consecutive years, subject to the employee’s continued employment through the applicable vesting date. In addition, in conjunction with our Corporate Reorganization and IPO, we established an equity incentive plan for purposes of granting stock-based compensation awards to certain of our senior management, our non-executive directors and to certain employees, to incentivize their performance and align their interests with ours. We have granted RSUs to certain employees and non-employee directors that have a service-based vesting condition. In addition, we granted performance stock units (“PSUs”) to certain members of management that have a performance-based vesting condition. We account for forfeitures of outstanding but unvested grants in the period they occur. A maximum of 10.5 million shares of common stock were initially available for issuance under equity incentive awards granted pursuant to the plan. In the three and six months ended June 30, 2021, zero and 0.2 million RSUs and zero and 0.2 million PSUs were granted, respectively. As of June 30, 2021, there were stock-based compensation awards representing approximately 0.7 million shares outstanding compared to 0.4 million shares outstanding as of December 31, 2020. Stock-based compensation expense was $2 million and $3 million for the three and six months ended June 30, 2021, respectively, and $2 million and $3 million in the comparable prior year periods.

Stock-based Compensation

6 Months Ended

Jun. 30, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Note 5 – Stock-based Compensation

We granted restricted stock units (“RSUs”) in July 2019 to certain members of management, pursuant to retention agreements entered into with these employees (the “IPO Grants”). These RSUs vest upon satisfaction of both a performance-based vesting condition (the “IPO Condition”) and a service-based vesting condition (the “Service Condition”). The IPO Condition was satisfied when we completed our IPO on February 4, 2020. The Service Condition will be satisfied with respect to one-third of an employee’s RSUs on each anniversary from the date of our IPO for three consecutive years, subject to the employee’s continued employment through the applicable vesting date.

In addition, in conjunction with our Corporate Reorganization and IPO, we established an equity incentive plan for purposes of granting stock-based compensation awards to certain of our senior management, our non-executive directors and to certain employees, to incentivize their performance and align their interests with ours. We have granted RSUs to certain employees and non-employee directors that have a service-based vesting condition. In addition, we granted performance stock units (“PSUs”) to certain members of management that have a performance-based vesting condition. We account for forfeitures of outstanding but unvested grants in the period they occur. A maximum of 10.5 million shares of common stock were initially available for issuance under equity incentive awards granted pursuant to the plan. In the three and six months ended June 30, 2021, zero and 0.2 million RSUs and zero and 0.2 million PSUs were granted, respectively.

As of June 30, 2021, there were stock-based compensation awards representing approximately 0.7 million shares outstanding compared to 0.4 million shares outstanding as of December 31, 2020. Stock-based compensation expense was $2 million and $3 million for the three and six months ended June 30, 2021, respectively, and $2 million and $3 million in the comparable prior year periods.