Rendering
| Component: (Network and Table) |
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| Network | 2304301 - Disclosure - Stock-based compensation (Tables) (http://www.amgen.com/role/StockBasedCompensationTables) |
| Table | (Implied) |
Slicers (applies to each fact value in each table cell)
| Reporting Entity [Axis] | 0000318154 (http://www.sec.gov/CIK) |
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | Period [Axis] |
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2016-01-01 - 2016-12-31 |
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
Components of stock-based compensation expense recognized in the Consolidated Statements of Income | The following table reflects the components of stock-based compensation expense recognized in our Consolidated Statements of Income (in millions): | | | | | | | | | | | | | | Years ended December 31, | | 2016 | | 2015 | | 2014 | RSUs | $ | 177 |
| | $ | 190 |
| | $ | 219 |
| Performance units | 123 |
| | 132 |
| | 171 |
| Stock options | 11 |
| | — |
| | 18 |
| Total stock-based compensation expense, pretax | 311 |
| | 322 |
| | 408 |
| Tax benefit from stock-based compensation expense | (112 | ) | | (120 | ) | | (152 | ) | Total stock-based compensation expense, net of tax | $ | 199 |
| | $ | 202 |
| | $ | 256 |
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Summary of RSUs | The following summarizes select information regarding our RSUs: | | | | | | | | | During the year ended December 31, 2016 | | Units (in millions) | | Weighted-average grant date fair value | Balance nonvested at December 31, 2015 | 5.0 |
| | $ | 118.89 |
| Granted | 1.3 |
| | $ | 156.76 |
| Vested | (2.0 | ) | | $ | 96.91 |
| Forfeited | (0.4 | ) | | $ | 131.43 |
| Balance nonvested at December 31, 2016 | 3.9 |
| | $ | 141.07 |
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Summary of stock options | The following summarizes select information regarding our stock options: | | | | | | | | | | | | | | | During the year ended December 31, 2016 | | Options (in millions) | | Weighted- average exercise price | | Weighted- average remaining contractual life (years) | | Aggregate intrinsic value (in millions) | Balance unexercised at December 31, 2015 | 2.8 |
| | $ | 56.19 |
| | | | | Granted | 1.4 |
| | $ | 156.35 |
| | | | | Exercised | (1.0 | ) | | $ | 52.98 |
| | | | | Expired/forfeited | (0.1 | ) | | $ | 150.70 |
| | | | | Balance unexercised at December 31, 2016 | 3.1 |
| | $ | 100.21 |
| | 6.1 | | $ | 158 |
| Vested or expected to vest at December 31, 2016 | 3.0 |
| | $ | 96.92 |
| | 6.0 | | $ | 158 |
| Exercisable at December 31, 2016 | 1.8 |
| | $ | 57.95 |
| | 3.7 | | $ | 158 |
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Weighted average assumptions used and the resulting weighted average grant date fair value of performance units | The weighted-average assumptions used in the option valuation model and the resulting weighted-average estimated grant date fair value of stock options granted during the year ended December 31, 2016, were as follows: | | | | Closing price of our common stock on grant date | $156.35 | Expected volatility (average of implied and historical volatility) | 24.3 | % | Expected life (in years) | 5.8 |
| Risk-free interest rate | 1.5 | % | Expected dividend yield | 2.6 | % | Fair value of stock options granted | $27.55 |
The weighted-average assumptions used in these models and the resulting weighted-average grant date fair values of our performance units were as follows: | | | | | | | | | | | | | | Years ended December 31, | | 2016 | | 2015 | | 2014 | Closing price of our common stock on grant date | $ | 156.35 |
| | $ | 164.26 |
| | $ | 112.43 |
| Volatility | 25.8 | % | | 24.3 | % | | 23.8 | % | Risk-free interest rate | 0.9 | % | | 0.8 | % | | 0.8 | % | Fair value of unit | $ | 170.56 |
| | $ | 182.55 |
| | $ | 104.47 |
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