Note 12 - Employee Retirement Plans - Net Periodic Benefit Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member] | UNITED STATES
Service cost	$ 105	$ 102	$ 92
Interest cost	98	78	110
Expected return on plan assets	(210)	(209)	(186)
Amortization of prior service cost (credit)	6	4	6
Recognition of actuarial loss	29	10	12
Total net periodic benefit expense (income)	28	(15)	34
Special termination benefit charge	2		8
Total expense (income)	30	(15)	42
Current year actuarial loss (gain)	16	(105)	94
Recognition of actuarial (loss) gain	(29)	(10)	(12)
Current year prior service cost	28		1
Amortization of prior service (cost) credit	(6)	(4)	(6)
Total recognized in other comprehensive (loss) income	9	(119)	77
Pension Plan [Member] | Foreign Plan [Member]
Service cost	22	25	26
Interest cost	11	10	12
Expected return on plan assets	(9)	(7)	(9)
Amortization of prior service cost (credit)	(1)	(1)	(1)
Recognition of actuarial loss	8	1	10
Total net periodic benefit expense (income)	31	28	38
Settlement charge	2
Total expense (income)	33	28	38
Curtailment effects			(4)
Settlements	11
Current year actuarial loss (gain)	(27)	(7)	(11)
Recognition of actuarial (loss) gain	20	(1)	(10)
Amortization of prior service (cost) credit	1	1	1
Total recognized in other comprehensive (loss) income	5	(7)	(24)
Other Postretirement Benefits Plan [Member]
Service cost	9	10	9
Interest cost	15	15	20
Amortization of prior service cost (credit)	(5)	(6)	(5)
Amortization of actuarial (gain) loss	(5)	2	1
Total net periodic benefit expense (income)	14	21	25
Special termination benefit charge			1
Total expense (income)	14	21	26
Current year actuarial loss (gain)	(209)	(105)	58
Amortization of actuarial gain (loss)	5	(2)	(1)
Amortization of prior service (cost) credit	5	6	5
Total recognized in other comprehensive (loss) income	$ (199)	$ (101)	$ 62