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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Summary of restricted stock unit activity | The following is a summary of RSU activity under the 2011 Plan for the year ended December 31, 2020 (in millions except per share data):
|  | Shares |  | Weighted Average Grant Date Fair Value
Nonvested at beginning of year |  | 2.0 |  |  | $ | 18.59 |
Granted |  | 1.2 |  |  | 17.96 |
Vested |  | (0.9) |  |  | 18.99 |
Forfeited |  | (0.2) |  |  | 18.07 |
Nonvested at end of year |  | 2.1 |  |  | 18.08 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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