Note 10 - Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
UNITED STATES | Pension Plan [Member]
Interest cost	$ 3	$ 6	$ 10	$ 16
Expected return on plan assets	(7)	(9)	(20)	(26)
Amortization of net actuarial loss	3	2	7	8
Net periodic benefit cost (credit)	(1)	(1)	(3)	(2)
Foreign Plan [Member] | Pension Plan [Member]
Interest cost	1	1	3	4
Expected return on plan assets	(1)	(1)	(2)	(3)
Service cost	15	2	19	6
Amortization of net actuarial loss	2	3	7	7
Net periodic benefit cost (credit)	17	5	27	14
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Interest cost	1	1	2	2
Net periodic benefit cost (credit)	$ 1	$ 1	$ 2	$ 2