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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2019
Share-based Payment Arrangement [Abstract] |
Share based compensation expense | The following table summarizes share-based compensation expense, net of capitalized amounts, for the periods shown.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2019 |  | 2018 |  | 2019 |  | 2018
Cost of sales | $ | 2.2 |  |  | $ | 2.5 |  |  | $ | 6.9 |  |  | $ | 7.1 |
Research and development | 8.1 |  |  | 8.1 |  |  | 25.8 |  |  | 24.8 |
Selling, general and administrative | 14.1 |  |  | 16.5 |  |  | 46.4 |  |  | 45.4 |
Total share-based compensation expense included in net income | $ | 24.4 |  |  | $ | 27.1 |  |  | $ | 79.1 |  |  | $ | 77.3 |
Restricted Stock Units | A summary of our RSU and PSU activity for the nine months ended September 30, 2019 is as follows:
|  |  | Weighted |  |
|  |  | Average |  | Aggregate
|  |  | Grant Date |  | Intrinsic
(In millions, except weighted average grant date fair values) | Shares |  | Fair Value |  | Value
Nonvested at December 31, 2018 | 2.7 |  |  | $ | 69.19 |  |  | $ | 319.0 |
Granted | 0.7 |  |  | 142.87 |  |  |
Vested | (1.4 | ) |  | 68.89 |  |  |
Forfeited | (0.2 | ) |  | 83.09 |  |  |
Nonvested at September 30, 2019 | 1.8 |  |  | $ | 95.06 |  |  | $ | 276.0 |

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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=116856206&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=115993241&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=116856206&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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