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Note 7 - Leases (Tables) | 3 Months Ended
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Mar. 31, 2021
Leases [Abstract] |
Summary of Income Recognized on Lease Arrangements | Income recognized on operating lease arrangements for the three months ended March 31, 2021 and 2020 is presented below. Income recognized for sales-type lease arrangements is $1 million and $0 million for three months ended March 31, 2021 and 2020, respectively:
|  | Three Months Ended |
|  | March 31, |
(in millions) |  | 2021 |  |  | 2020 |
Lease income - operating leases: |  |  |  |  |  |  |  |
Lease income |  | $ | 2 |  |  | $ | 2 |
Sublease income |  |  | — |  |  |  | 2 |
Variable lease income |  |  | 1 |  |  |  | 1 |
Total lease income |  | $ | 3 |  |  | $ | 5 |

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- Definition Tabular disclosure of components of income from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306 + Details
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