Share-Based Compensation	3 Months Ended
Mar. 31, 2025
Equity [Abstract]
Share-Based Compensation	Share-Based Compensation We currently have employee and non-employee director incentive plans under which we have the ability to grant restricted stock units, or RSUs, and stock options, among other types of awards. These awards have various service, performance, and/or market conditions and are used as an incentive to attract and retain qualified employees and to align our and our stockholders' interests by linking actual performance to both short and long-term stockholder return. Stock options and RSUs are granted at the discretion of the Compensation Committee of our Board of Directors, or Board, based on the estimated fair value on the date of grant. The fair value of the stock options and RSUs on the date of grant is recognized as expense over the vesting period, net of estimated forfeitures. We also have an employee stock purchase plan, or ESPP, available to our employees. The non-cash compensation expenses recognized in our consolidated statements of income for stock options, RSUs and under our employee stock purchase plan, net of amounts classified as capitalized software, were $57 million for both the three months ended March 31, 2025 and 2024. For the three months ended March 31, 2025, $5 million and $6 million, respectively, of the total non-cash compensation expense was recorded within acquisition-related transaction and integration costs in the consolidated statement of income. Stock Options We have historically used the Black-Scholes option pricing model to value our stock option awards. During the three months ended March 31, 2025, we did not grant any stock option awards. Refer to Note 11 to the consolidated financial statements included in Part II, Item of our 2024 Form 10-K for information on the assumptions to value the stock option awards issued during the three months ended March 31, 2024. Restricted Stock Units Activity Service condition only RSUs During the three months ended March 31, 2025, we granted 0.8 million of time-based RSUs. The grant date fair value of each award is based on the closing stock price of our stock at the date of grant. These RSUs generally vest in equal installments on each anniversary of the grant date, subject to continued employment. The grant date fair value of time-based RSUs is recognized as expense ratably over the vesting period, which is three or four years, net of estimated forfeitures. Performance condition RSUs During the three months ended March 31, 2025, we granted 0.3 million of one-year performance based RSUs, or PSUs, to certain of our employees. The number of shares that will ultimately vest under these PSUs is based on our actual current year EBITDA relative to a pre-established goal set by our Board and the Compensation Committee. The PSUs will then vest in three equal installments on each anniversary of the grant date, subject to continued employment. The grant date fair value of these awards was based on the closing stock price of our stock at the date of grant. For these PSUs, we recognize expense on an accelerated basis over the three-year vesting period based on our quarterly assessment of the probable 2025 actual financial performance as compared to the 2025 financial performance targets, net of estimated forfeitures. As of March 31, 2025, our best estimate is that the financial performance level will be at target for 2025. During the three months ended March 31, 2025, we also granted 0.1 million of three-year PSUs to certain of our employees. The number of shares that will ultimately vest under these PSUs is based on our 2027 EBITDA relative to a pre-established goal set by our Board and the Compensation Committee. These PSUs will cliff-vest on the third anniversary of the grant date, subject to continued employment. The grant date fair value of these awards was based on the closing stock price of our stock at the date of grant. For these PSUs, we recognize expense ratably over the vesting period based on our quarterly assessment of the probable actual financial performance as compared to the financial performance targets, net of estimated forfeitures. As of March 31, 2025, our best estimate is that the financial performance level will be at target for the performance period. Market condition RSUs During the three months ended March 31, 2025, we granted 0.1 million of three-year total stockholder return, or TSR, performance based RSUs, or TSR-based PSUs. The number of shares that will ultimately vest under these TSR-based PSUs will be based on our cumulative TSR performance over the three-year period relative to that of the S&P 500. These TSR-based PSUs will cliff-vest on the third anniversary of the grant date, subject to continued employment. The fair value of these awards was estimated based on a simulation of various outcomes and included inputs such as our stock price at the beginning of the period subject to the market condition, the risk-free interest rate, the time period of the market condition, and the expected volatility of our stock and the underlying equity securities of the S&P 500 benchmark index subject to the market condition. For these TSR-based PSUs, we recognize expense ratably over the vesting period, net of estimated forfeitures. Employee Stock Purchase Plan We offer our employees the ability to participate in our ESPP, under which we have reserved and may sell up to 25 million shares of our common stock to employees. Under our ESPP, participating employees have the right to acquire shares of our common stock in increments of 1% of eligible pay, with a maximum contribution of 25% of eligible pay, subject to applicable annual Internal Revenue Service, or IRS, limitations. Participating employees are limited to acquiring up to $25,000 of our common stock annually, and a maximum of 1,250 shares of common stock during each offering period. There are two offering periods each year, from January 1st (or the first trading day thereafter) through June 30th (or the last trading day prior to such date) and from July 1st (or the first trading day thereafter) through December 31st (or the last trading day prior to such date). The purchase price per share of common stock is 85% of the lesser of the fair market value of the stock on the first or the last trading day of each offering period.

We currently have employee and non-employee director incentive plans under which we have the ability to grant restricted stock units, or RSUs, and stock options, among other types of awards. These awards have various service, performance, and/or market conditions and are used as an incentive to attract and retain qualified employees and to align our and our stockholders' interests by linking actual performance to both short and long-term stockholder return. Stock options and RSUs are granted at the discretion of the Compensation Committee of our Board of Directors, or Board, based on the estimated fair value on the date of grant. The fair value of the stock options and RSUs on the date of grant is recognized as expense over the vesting period, net of estimated forfeitures. We also have an employee stock purchase plan, or ESPP, available to our employees.

The non-cash compensation expenses recognized in our consolidated statements of income for stock options, RSUs and under our employee stock purchase plan, net of amounts classified as capitalized software, were $57 million for both the three months ended March 31, 2025 and 2024. For the three months ended March 31, 2025, $5 million and $6 million, respectively, of the total non-cash compensation expense was recorded within acquisition-related transaction and integration costs in the consolidated statement of income.

We have historically used the Black-Scholes option pricing model to value our stock option awards. During the three months ended March 31, 2025, we did not grant any stock option awards. Refer to Note 11 to the consolidated financial statements included in Part II, Item of our 2024 Form 10-K for information on the assumptions to value the stock option awards issued during the three months ended March 31, 2024.

During the three months ended March 31, 2025, we granted 0.8 million of time-based RSUs. The grant date fair value of each award is based on the closing stock price of our stock at the date of grant. These RSUs generally vest in equal installments on each anniversary of the grant date, subject to continued employment. The grant date fair value of time-based RSUs is recognized as expense ratably over the vesting period, which is three or four years, net of estimated forfeitures.

During the three months ended March 31, 2025, we granted 0.3 million of one-year performance based RSUs, or PSUs, to certain of our employees. The number of shares that will ultimately vest under these PSUs is based on our actual current year EBITDA relative to a pre-established goal set by our Board and the Compensation Committee. The PSUs will then vest in three equal installments on each anniversary of the grant date, subject to continued employment. The grant date fair value of these awards was based on the closing stock price of our stock at the date of grant. For these PSUs, we recognize expense on an accelerated basis over the three-year vesting period based on our quarterly assessment of the probable 2025 actual financial performance as compared to the 2025 financial performance targets, net of estimated forfeitures. As of March 31, 2025, our best estimate is that the financial performance level will be at target for 2025.

During the three months ended March 31, 2025, we also granted 0.1 million of three-year PSUs to certain of our employees. The number of shares that will ultimately vest under these PSUs is based on our 2027 EBITDA relative to a pre-established goal set by our Board and the Compensation Committee. These PSUs will cliff-vest on the third anniversary of the grant date, subject to continued employment. The grant date fair value of these awards was based on the closing stock price of our stock at the date of grant. For these PSUs, we recognize expense ratably over the vesting period based on our quarterly assessment of the probable actual financial performance as compared to the financial performance targets, net of estimated forfeitures. As of March 31, 2025, our best estimate is that the financial performance level will be at target for the performance period.

During the three months ended March 31, 2025, we granted 0.1 million of three-year total stockholder return, or TSR, performance based RSUs, or TSR-based PSUs. The number of shares that will ultimately vest under these TSR-based PSUs will be based on our cumulative TSR performance over the three-year period relative to that of the S&P 500. These TSR-based PSUs will cliff-vest on the third anniversary of the grant date, subject to continued employment. The fair value of these awards was estimated based on a simulation of various outcomes and included inputs such as our stock price at the beginning of the period subject to the market condition, the risk-free interest rate, the time period of the market condition, and the expected volatility of our stock and the underlying equity securities of the S&P 500 benchmark index subject to the market condition. For these TSR-based PSUs, we recognize expense ratably over the vesting period, net of estimated forfeitures.

We offer our employees the ability to participate in our ESPP, under which we have reserved and may sell up to 25 million shares of our common stock to employees. Under our ESPP, participating employees have the right to acquire shares of our common stock in increments of 1% of eligible pay, with a maximum contribution of 25% of eligible pay, subject to applicable annual Internal Revenue Service, or IRS, limitations. Participating employees are limited to acquiring up to $25,000 of our common stock annually, and a maximum of 1,250 shares of common stock during each offering period. There are two offering periods each year, from January 1st (or the first trading day thereafter) through June 30th (or the last trading day prior to such date) and from July 1st (or the first trading day thereafter) through December 31st (or the last trading day prior to such date). The purchase price per share of common stock is 85% of the lesser of the fair market value of the stock on the first or the last trading day of each offering period.