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Business Segments | 3 Months Ended
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Mar. 31, 2021
Segment Reporting [Abstract] |
Business Segments | Note O – Business Segments Information about business segments and geographic operations is reported in the following table. For geographic purposes, revenues are attributed to the country in which the sale occurs. Corporate, including interest income, other gains and losses (including foreign exchange gains/losses and realized and unrealized gains/losses on crude oil contracts), interest expense and unallocated overhead, is shown in the tables to reconcile the business segments to consolidated totals.
|  | Total Assets at March 31, 2021 |  | Three Months Ended March 31, 2021 |  | Three Months Ended March 31, 2020
(Millions of dollars) |  |  | External Revenues |  | Income (Loss) |  | External Revenues |  | Income (Loss)
Exploration and production ¹ |  |  |  |  |  |  |  |  |  |
United States |  | $ | 6,737.8 |  |  | 490.3 |  |  | 119.0 |  |  | 511.5 |  |  | (696.0) |
Canada |  | 2,364.0 |  |  | 104.0 |  |  | (124.3) |  |  | 89.7 |  |  | (6.9) |
Other |  | 264.3 |  |  | — |  |  | (6.9) |  |  | 1.8 |  |  | (52.3) |
Total exploration and production |  | 9,366.1 |  |  | 594.3 |  |  | (12.2) |  |  | 603.0 |  |  | (755.2) |
Corporate |  | 917.4 |  |  | (214.3) |  |  | (254.8) |  |  | 400.7 |  |  | 251.4 |
Assets/revenue/income (loss) from continuing operations |  | 10,283.5 |  |  | 380.0 |  |  | (267.0) |  |  | 1,003.7 |  |  | (503.8) |
Discontinued operations, net of tax |  | 0.8 |  |  | — |  |  | 0.2 |  |  | — |  |  | (4.9) |
Total |  | $ | 10,284.3 |  |  | 380.0 |  |  | (266.8) |  |  | 1,003.7 |  |  | (508.7) |
1 Additional details about results of oil and gas operations are presented in the table on pages 25.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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