Note 13 - Employee Retirement Plans - Changes in Fair Value of Level 3 Assets for Defined Benefit Plan (Details) - Pension Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
UNITED STATES
Balance	$ 3,575	$ 3,153
Balance	3,598	3,575
Foreign Plan [Member]
Balance	598	518
Balance	584	598
Foreign Plan [Member] | Collateralized Mortgage Backed Securities [Member]
Balance	20
Balance	22	20
Foreign Plan [Member] | Insurance Contracts [Member]
Balance	3
Balance	2	3
Fair Value, Inputs, Level 3 [Member] | UNITED STATES | Private Equity Funds [Member]
Balance	51	64
Actual return on plan assets relating to assets still held at the reporting date	21	4
Asset (sales) purchases	(31)	(17)
Balance	41	51
Fair Value, Inputs, Level 3 [Member] | UNITED STATES | Defined Benefit Plan, Real Estate [Member]
Balance	140	145
Actual return on plan assets relating to assets still held at the reporting date	1
Asset (sales) purchases	(135)	(5)
Actual return on plan assets relating to assets sold during the reporting period	4
Balance	10	140
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member]
Balance	23
Balance	24	23
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member] | Collateralized Mortgage Backed Securities [Member]
Balance	20	21
Actual return on plan assets relating to assets still held at the reporting date	2
Asset (sales) purchases		(1)
Balance	22	20
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member] | Insurance Contracts [Member]
Balance	3	2
Asset (sales) purchases	(1)	1
Balance	$ 2	$ 3