XML 118 R41.htm IDEA: XBRL DOCUMENT
v3.20.4

SHARE-BASED PAYMENTS SHARE-BASED PAYMENTS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Restricted Stock Units Activity |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Activity | The following tables set forth activity and various statistics for our restricted stock unit awards:
|  | Number of Units |  | Weighted Average Price
Nonvested December 31, 2019 |  | 698,990 |  |  | $ | 54.05 |
Granted |  | 216,392 |  |  | $ | 76.49 |
Released to participants |  | (240,576) |  |  | $ | 46.58 |
Forfeited |  | (28,519) |  |  | $ | 65.20 |
Nonvested December 31, 2020 |  | 646,287 |  |  | $ | 63.85 |
|  | 2020 |  | 2019 |  | 2018
Weighted-average grant date fair value (per share) |  | $ | 76.49 |  |  | $ | 58.07 |  |  | $ | 46.94 |
Fair value of units granted (thousands of dollars) |  | $ | 16,552 |  |  | $ | 15,238 |  |  | $ | 13,907 |
Grant date fair value of units vested (thousands of dollars) |  | $ | 11,204 |  |  | $ | 10,691 |  |  | $ | 9,552 |
Performance-Unit Activity |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Activity | The following tables set forth activity and various statistics related to the performance unit awards and the assumptions used in the valuations at the respective grant dates:
|  | Number of Units |  | Weighted Average Price
Nonvested December 31, 2019 |  | 937,821 |  |  | $ | 66.67 |
Granted |  | 283,029 |  |  | $ | 88.43 |
Released to participants |  | (300,423) |  |  | $ | 58.99 |
Forfeited |  | (86,181) |  |  | $ | 74.83 |
Nonvested December 31, 2020 |  | 834,246 |  |  | $ | 75.96 |
|  | 2020 |  | 2019 |  | 2018
Volatility (a) |  | 21.70% |  | 27.10% |  | 39.20%
Dividend yield |  | 4.87% |  | 5.05% |  | 5.49%
Risk-free interest rate |  | 1.39% |  | 2.47% |  | 2.44%
(a) - Volatility was based on historical volatility over three years using daily stock price observations.
|  | 2020 |  | 2019 |  | 2018
Weighted-average grant date fair value (per share) |  | $ | 88.43 |  |  | $ | 68.02 |  |  | $ | 59.57 |
Fair value of units granted (thousands of dollars) |  | $ | 25,028 |  |  | $ | 23,020 |  |  | $ | 22,081 |
Grant date fair value of units vested (thousands of dollars) |  | $ | 17,722 |  |  | $ | 15,018 |  |  | $ | 12,545 |

X
- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -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 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&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 (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |