XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.20.2

Incentive Plans (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Share-based Payment Arrangement [Abstract] |
Share-Based Plans, Amounts Recognized | Amounts recognized in the financial statements with respect to share-based plans are shown in the following table:
| Nine Months Ended September 30,
(Thousands of dollars) | 2020 |  | 2019
Compensation charged against income before tax benefit | $ | 17,542 |  |  | 39,884 |
Related income tax benefit recognized in income | 2,278 |  |  | 6,204 |

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 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