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Note 19 - Summary of Total Fair Value, Unfunded Commitments and Redemption Provisions for U.S. Defined Benefit Pension Plan's Investments (Details) - U.S. [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair Value | $ 3,447 | $ 3,058
Unfunded Commitments | 288 | 268
Global Equity Securities Fund [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair Value | $ 201 | $ 254
Redemption Frequency | Monthly, Quarterly | Monthly, Quarterly
Global Equity Securities Fund [Member] | Minimum [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Redemption Notice Period | 6 days | 6 days
Global Equity Securities Fund [Member] | Maximum [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Redemption Notice Period | 90 days | 90 days
Real Estate [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair Value | $ 36 | $ 37
Redemption Frequency | N/A | N/A
Global Balanced Asset Allocation Funds [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair Value | $ 327 | $ 514
Redemption Frequency | Monthly | Monthly
Global Balanced Asset Allocation Funds [Member] | Minimum [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Redemption Notice Period | 6 days | 6 days
Global Balanced Asset Allocation Funds [Member] | Maximum [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Redemption Notice Period | 15 days | 15 days
Private Equity [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair Value | $ 1,082 | $ 768
Unfunded Commitments | $ 262 | $ 268
Redemption Frequency | N/A | N/A
Hedge Funds [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair Value | $ 1,801 | $ 1,485
Unfunded Commitments | $ 26 |
Redemption Frequency | Bi-Monthly, Monthly, Quarterly, Semi-Annual, and Annual | Bi-Monthly, Monthly, Quarterly, Semi-Annual, and Annual
Hedge Funds [Member] | Minimum [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Redemption Notice Period | 5 days | 5 days
Hedge Funds [Member] | Maximum [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Redemption Notice Period | 365 days | 365 days

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- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI http://asc.fasb.org/extlink&oid=122636397&loc=SL7495116-110257 + Details
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- Definition States the frequency (for example, annually, semi-annually, quarterly) with which the entity can redeem its investment, or portion thereof, for each of those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments), by major category. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258 + Details
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- Definition Notice period the entity is required to deliver before it can redeem an investment calculated using net asset value per share, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, investments calculated by per unit, per membership interest, other equity or ownership interest and alternative investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258 + Details
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- 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
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- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258 + Details
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