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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Compensation And Retirement Disclosure [Abstract] |
Schedule of Fair Value of TSR Performance RSUs | We estimated the fair value of the TSR Performance RSUs referred to above on the date of the grant using a Monte Carlo simulation with the following assumptions:
|  | Year Ended December 31, |
|  |  | 2019 |  |  |  | 2018 |  |  |  | 2017 |
Volatility of common stock |  |  | 25.96 | % |  |  | 25.02 | % |  |  | 27.85 | %
Expected dividend yield |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Risk-free interest rate |  |  | 2.12 | % |  |  | 2.73 | % |  |  | 2.33 | %
Schedule of Non-Vested Stock Awards | A summary of the status of our non-vested stock awards is presented in the table below:
|  | Shares/Units |  |  | Weighted Average Market Value Per Share |
Balance at December 31, 2016 |  |  | 4,843,273 |  |  | $ | 31.66 |
Granted |  |  | 5,152,082 |  |  |  | 40.11 |
Performance award achievement adjustments |  |  | 489,219 |  |  |  | 30.93 |
Vested |  |  | (2,510,031 | ) |  |  | 29.98 |
Forfeited |  |  | (297,441 | ) |  |  | 32.85 |
Balance at December 31, 2017 |  |  | 7,677,102 |  |  |  | 37.76 |
Granted |  |  | 2,023,266 |  |  |  | 45.70 |
Performance award achievement adjustments |  |  | 282,953 |  |  |  | 38.09 |
Vested |  |  | (2,177,800 | ) |  |  | 34.78 |
Forfeited |  |  | (623,161 | ) |  |  | 40.85 |
Balance at December 31, 2018 |  |  | 7,182,360 |  |  |  | 41.04 |
Granted |  |  | 2,000,977 |  |  |  | 50.07 |
Performance award achievement adjustments |  |  | 166,007 |  |  |  | 37.36 |
Vested |  |  | (1,323,351 | ) |  |  | 37.43 |
Forfeited |  |  | (316,294 | ) |  |  | 42.09 |
Balance at December 31, 2019 |  |  | 7,709,699 |  |  |  | 43.89 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + 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 (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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