XML 128 R43.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Share-Based Compensation (Stock Options and Restricted Stock Units) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of recognized share-based compensation expense | The tables below provide information on our share-based compensation.
Recognized Share-Based Compensation Expense |  |  |  |  |  |  |  |
Year ended December 31 (in millions) | 2019 |  |  | 2018 |  |  | 2017 |
Restricted share units | $ | 564 |  |  | $ | 402 |  |  | $ | 349 |
Stock options | 231 |  |  | 205 |  |  | 205 |
Employee stock purchase plans | 30 |  |  | 32 |  |  | 32 |
Total | $ | 825 |  |  | $ | 639 |  |  | $ | 586 |
Schedule of stock option and restricted share units activity |
Stock Options and Restricted Share Units |  |  |
As of December 31, 2019, unless otherwise stated (in millions, except per share data) | Stock Options |  |  | RSUs |
Awards granted during 2019 | 42 |  |  | 17 |
Weighted-average exercise price of awards granted during 2019 | $ | 40.50 |  |  |
Stock options outstanding and nonvested RSUs | 192 |  |  | 51 |
Weighted-average exercise price of stock options outstanding | $ | 31.84 |  |  |
Weighted-average fair value at grant date of nonvested RSUs |  |  | $ | 36.54 |
Schedule of stock option and restricted share units fair value and significant assumptions | The table below presents the weighted-average fair value on the date of grant of RSUs and stock options awarded under our various plans and the related weighted-average valuation assumptions.
Year ended December 31 | 2019 |  |  | 2018 |  |  | 2017 |
RSUs fair value | $ | 40.42 |  |  | $ | 35.56 |  |  | $ | 37.77 |
Stock options fair value | $ | 7.91 |  |  | $ | 7.14 |  |  | $ | 7.01 |
Stock Option Valuation Assumptions: |  |  |  |  |
Dividend yield | 2.1 | % |  | 2.1 | % |  | 1.7 | %
Expected volatility | 22.0 | % |  | 22.0 | % |  | 20.1 | %
Risk-free interest rate | 2.5 | % |  | 2.7 | % |  | 2.2 | %
Expected option life (in years) | 6.0 |  |  | 6.0 |  |  | 6.1 |

X
- Definition Stock option fair value and significant assumptions + References No definition available. + Details
Name: | cmcsa_StockOptionFairValueAndSignificantAssumptionsTextBlock
Namespace Prefix: | cmcsa_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of 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 1 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration