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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of stock-based compensation expense and tax benefits | The following table reflects activity related to our stock-based compensation arrangements (in millions):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Stock-based compensation expense: |  |  |  |  |
Restricted stock | $ | 65 |  |  | $ | 63 |  |  | $ | 64 |
Performance awards | 21 |  |  | 15 |  |  | 23 |
Stock options and other awards | 2 |  |  | 2 |  |  | 2 |
Total stock-based compensation expense | $ | 88 |  |  | $ | 80 |  |  | $ | 89 |
Tax benefit recognized on stock-based compensation expense | $ | 13 |  |  | $ | 13 |  |  | $ | 19 |
Tax benefit realized for tax deductions resulting from exercises and vestings | 1 |  |  | 1 |  |  | 17 |
Summary of restricted stock awards | A summary of the status of our restricted stock awards is presented in the following table:
| Number of Shares |  | Weighted- Average Grant-Date Fair Value Per Share
Nonvested shares as of January 1, 2021 | 1,437,912 |  |  | $ | 69.47 |
Granted | 831,337 |  |  | 77.71 |
Vested | (797,751) |  |  | 75.36 |
Forfeited | (13,307) |  |  | 70.64 |
Nonvested shares as of December 31, 2021 | 1,458,191 |  |  | 70.93 |
The following table reflects activity related to our restricted stock:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Weighted-average grant-date fair value per share of restricted stock granted | $ | 77.71 |  |  | $ | 55.62 |  |  | $ | 98.75 |
Fair value of restricted stock vested (in millions) | 59 |  |  | 35 |  |  | 74 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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