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Stock-Based Compensation - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Mar. 23, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation cost | $ 205,000,000 | $ 210,000,000 | $ 187,000,000 |
Tax benefit of stock-based compensation cost | $ 16,000,000 |  |  |
Weighted average remaining contractual term for options outstanding | 4 years 4 months 24 days |  |  |
Weighted average remaining contractual term for options exercisable | 4 years 1 month 6 days |  |  |
Options vested (in shares) | 850,000 | 1,553,000 | 867,000 |
Fair value of options vested | $ 7,000,000 | $ 14,000,000 | $ 10,000,000 |
Total intrinsic value of stock options exercised | 1,000,000 |  |  |
Total intrinsic value of stock options outstanding | 2,000,000 |  |  |
Total intrinsic value of stock options exercisable | $ 2,000,000 |  |  |
Share price (in dollars per share) | $ 24.06 |  |  | $ 9.33
RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award of common stock, right to receive (in shares) | 1 |  |  |
Stock-based compensation, service period | 3 years |  |  |
Vested intrinsic value | $ 141,000,000 |  |  |
Intrinsic value, outstanding | 386,000,000 |  |  |
Fair value options vested in period | 162,000,000 |  |  |
Unrecognized compensation cost, unvested | $ 185,000,000 |  |  |
Weighted average period of recognition for unrecognized compensation cost | 1 year 10 months 9 days |  |  |
RSUs | Non-employee director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation, service period | 1 year |  |  |
PSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation, service period | 3 years |  |  |
Vested intrinsic value | $ 15,000,000 |  |  |
Fair value options vested in period | 22,000,000 |  |  |
Unrecognized compensation cost, unvested | $ 35,000,000 |  |  |
Weighted average period of recognition for unrecognized compensation cost | 1 year 11 months 12 days |  |  |
Unvested intrinsic value | $ 89,000,000 |  |  |
Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Expected life (years) |  |  | 6 years |
Risk free interest rate |  |  | 2.60% |
Volatility percentage |  |  | 36.50% |
Dividend yield |  |  | 3.10% |
Weighted average fair value per share at grant date (in dollars per share) |  |  | $ 6.37 |
Maximum contractual term | 7 years 1 month 6 days |  |  |
Employee Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Employee purchase, maximum per quarter | $ 3,000 |  |  |
Employee purchase, maximum | $ 12,000 |  |  |
Class A Common Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock authorized (in shares) | 2,000,000,000 | 2,000,000,000 |  |
Class A Common Stock | Employee Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Discount of the fair market value | 15.00% |  |  |
Common stock authorized (in shares) | 21,500,000 |  |  |
Common stock reserved for future issuance (in shares) | 12,500,000 |  |  |
Class A Common Stock | Employee Stock | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
After-tax basis | 1.00% |  |  |
Class A Common Stock | Employee Stock | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
After-tax basis | 20.00% |  |  |
LTI Plan | Class A Common Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized (in shares) | 29,500,000 |  |  |
Number of shares available for issuance (in shares) | 31,700,000 |  |  |
Number of shares from initial reserve (in shares) | 2,500,000 |  |  |
LTI Plan, initial reserve | Class A Common Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares available for issuance (in shares) | 29,200,000 |  |  |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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