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Note 13 - Guarantees (Tables) | 12 Months Ended
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Dec. 31, 2020
Guarantees [Abstract] |
Deferred Revenue, by Arrangement |
(in millions) |  |  |  |
Deferred revenue on extended warranties as of December 31, 2018 |  | $ | 22 |
New extended warranty and maintenance arrangements |  |  | 98 |
Recognition of extended warranty and maintenance arrangement revenue |  |  | (99 | )
Deferred revenue on extended warranties as of December 31, 2019 |  |  | 21 |
New extended warranty and maintenance arrangements |  |  | 91 |
Recognition of extended warranty and maintenance arrangement revenue |  |  | (93 | )
Deferred revenue on extended warranties as of December 31, 2020 |  | $ | 19 |

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- Definition Tabular disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6935-107765 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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