Note 20 - Retirement Plans - Summary of Total Fair Value, Unfunded Commitments and Redemption Provisions for U.S. Defined Benefit Pension (Details) - UNITED STATES - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Fair Value	$ 2,649	$ 3,447
Unfunded Commitments	255	288
Real Estate [Member]
Fair Value	29	36
Unfunded Commitments	0	0
Global Equity Securities Funds [Member]
Fair Value		201
Unfunded Commitments		$ 0
Global Equity Securities Funds [Member] \| Minimum [Member]
Redemption Notice Period (Day)		6 days
Global Equity Securities Funds [Member] \| Maximum [Member]
Redemption Notice Period (Day)		90 days
Private Equity Funds [Member]
Fair Value	1,092	$ 1,082
Unfunded Commitments	229	262
Hedge Funds [Member]
Fair Value	1,528	1,801
Unfunded Commitments	$ 26	$ 26
Hedge Funds [Member] \| Minimum [Member]
Redemption Notice Period (Day)	5 days	5 days
Hedge Funds [Member] \| Maximum [Member]
Redemption Notice Period (Day)	365 days	365 days
Global Balanced Asset Allocation Funds [Member]
Fair Value		$ 327
Unfunded Commitments		$ 0
Global Balanced Asset Allocation Funds [Member] \| Minimum [Member]
Redemption Notice Period (Day)		6 days
Global Balanced Asset Allocation Funds [Member] \| Maximum [Member]
Redemption Notice Period (Day)		15 days

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.

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 https://asc.fasb.org/extlink&oid=126976982&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 https://asc.fasb.org/extlink&oid=126972413&loc=SL7495116-110257

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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 https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258

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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

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-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258

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