XML 55 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stock-Based Awards and Other Equity Instruments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Stock Option Activity | The following table presents a summary of our stock option activity:
| Options |  | Weighted Average Exercise Price |  | Remaining Contractual Life |  | Aggregate Intrinsic Value
| (In thousands) |  |  |  | (In years) |  | (In thousands)
Balance as of January 1, 2015 | 14,435 |  |  | $ | 49.33 |  |  |  |  |
Granted | 7,572 |  |  | 94.13 |  |  |  |  |
Exercised | (4,201 | ) |  | 34.57 |  |  |  |  |
Cancelled | (751 | ) |  | 74.06 |  |  |  |  |
Balance as of December 31, 2015 | 17,055 |  |  | 71.77 |  |  |  |  |
Granted | 5,670 |  |  | 105.37 |  |  |  |  |
Exercised | (2,686 | ) |  | 47.57 |  |  |  |  |
Cancelled | (1,198 | ) |  | 91.62 |  |  |  |  |
Balance as of December 31, 2016 | 18,841 |  |  | 84.07 |  |  |  |  |
Granted | 3,618 |  |  | 124.08 |  |  |  |  |
Exercised | (3,422 | ) |  | 62.67 |  |  |  |  |
Cancelled | (3,384 | ) |  | 96.86 |  |  |  |  |
Balance as of December 31, 2017 | 15,653 |  |  | 95.23 |  |  | 4.4 |  | $ | 402,509 |
Exercisable as of December 31, 2017 | 5,903 |  |  | 74.64 |  |  | 3.1 |  | 266,849 |
Vested and expected to vest after December 31, 2017 | 15,653 |  |  | 95.23 |  |  | 4.4 |  | 402,509 |
Weighted Average Assumptions of Black-Scholes and Monte Carlo Option-Pricing Models | The fair value of stock options granted during the years ended December 31, 2017, 2016 and 2015 were estimated at the date of grant using appropriate valuation techniques, including the Black-Scholes and Monte Carlo option-pricing models, assuming the following weighted average assumptions:
| 2017 |  | 2016 |  | 2015
Risk-free interest rate | 1.58 | % |  | 0.97 | % |  | 1.19 | %
Expected volatility | 32.47 | % |  | 39.06 | % |  | 41.48 | %
Expected life (in years) | 3.65 |  |  | 3.59 |  |  | 4.06 |
Dividend yield | 0.92 | % |  | 0.91 | % |  | 0.78 | %
Weighted-average estimated fair value of options granted during the year | $ | 30.17 |  |  | $ | 29.48 |  |  | $ | 30.56 |
Summary of Restricted Stock Units Activity | The following table presents a summary of RSU activity:
| RSUs |  | Weighted Average Grant-Date Fair Value
| (In thousands) |  |
Balance as of January 1, 2015 | 337 |  |  | $ | 61.97 |
Granted | 1,643 |  |  | 123.42 |
Vested | (493 | ) |  | 103.73 |
Cancelled | (91 | ) |  | 67.11 |
Balance as of December 31, 2015 | 1,396 |  |  | 119.20 |
Granted | 691 |  |  | 109.38 |
Vested | (516 | ) |  | 118.71 |
Cancelled | (222 | ) |  | 117.84 |
Balance as of December 31, 2016 | 1,349 |  |  | 114.58 |
Granted | 1,350 |  |  | 123.24 |
Vested | (492 | ) |  | 115.29 |
Cancelled | (266 | ) |  | 116.26 |
Balance as of December 31, 2017 | 1,941 |  |  | 120.19 |

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 for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration