Note 10 - Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
UNITED STATES | Pension Plan [Member]
Interest cost	$ 4	$ 5	$ 7	$ 10
Expected return on plan assets	(6)	(8)	(13)	(17)
Amortization of net actuarial loss	2	3	4	6
Net periodic benefit cost (credit)	0	0	(2)	(1)
Foreign Plan [Member] | Pension Plan [Member]
Interest cost	1	2	2	3
Expected return on plan assets	(1)	(1)	(1)	(2)
Service cost	2	2	4	4
Amortization of net actuarial loss	3	2	5	4
Net periodic benefit cost (credit)	5	5	10	9
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Interest cost	0	0	1	1
Net periodic benefit cost (credit)	$ 0	$ 0	$ 1	$ 1