XML 45 R35.htm IDEA: XBRL DOCUMENT
v3.20.2

Note 12 - Equity Compensation Plans (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Notes Tables |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Option |  |  | Restricted Stock |  |  | PSU |
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |  |  | Number of Shares |  |  |  | Weighted Average Grant Date Fair Value Per Share |
|  |  |  |  |  |  |  |  |  | (in millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2019 |  |  | 6,432,814 |  |  | $ | 79.51 |  |  | $ | 449.2 |  |  |  | 428,729 |  |  | $ | 107.96 |  |  |  | 93,960 |  |  |  | $ | 158.50 |
Granted |  |  | 924,810 |  |  | $ | 158.94 |  |  |  |  |  |  |  | 159,328 |  |  | $ | 159.30 |  |  |  | 50,736 |  |  |  | $ | 192.93 |
Dividend reinvestment |  |  | — |  |  | $ | — |  |  |  |  |  |  |  | — |  |  | $ | — |  |  |  | 713 |  |  |  |  | N/A |
Exercised or lapsed |  |  | (1,308,469 | ) |  | $ | 54.86 |  |  | $ | 148.4 |  |  |  | (169,101 | ) |  | $ | 99.91 |  |  |  | — |  |  |  |  |  |
Canceled, expired or forfeited |  |  | (114,597 | ) |  | $ | 123.00 |  |  |  |  |  |  |  | (20,341 | ) |  | $ | 121.60 |  |  |  | — |  |  |  |  |  |
Outstanding at September 30, 2020 |  |  | 5,934,558 |  |  | $ | 96.48 |  |  | $ | 527.2 |  |  |  | 398,615 |  |  | $ | 130.77 |  |  |  | 145,409 |  |  |  | $ | 170.75 |
Exercisable at September 30, 2020 |  |  | 3,799,648 |  |  | $ | 75.69 |  |  | $ | 416.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercisable at December 31, 2019 |  |  | 4,175,855 |  |  | $ | 65.05 |  |  | $ | 352.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested at September 30, 2020 |  |  | 2,134,910 |  |  |  |  |  |  |  |  |  |  |  | 398,615 |  |  |  |  |  |  |  | 145,409 |  |  |  |  |  |
Expected to vest at September 30, 2020 |  |  | 1,880,444 |  |  |  |  |  |  |  |  |  |  |  | 351,554 |  |  |  |  |  |  |  | 269,001 |  | (1) |  |  |  |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2020 |  |  | 2019 |
Option pricing model |  | Black-Scholes |  |  | Black-Scholes |
Expected volatility |  | 18.41 | % |  | 18.76 | %
Risk-free interest rate |  | 1.53 | % |  | 2.27 | %
Expected term in years |  | 4.3 |  |  | 4.4 |
Dividend yield |  | 0.71 | % |  | 0.80 | %
Weighted average grant date fair value per stock option |  | $25.77 |  |  | $24.09 |

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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&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://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=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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