Note 11 - Pension and Postretirement Benefit Plans - Reconciliation of Level 3 Pension Plan Assets (Details) - Pension Plan [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023
Fair value at beginning of period		$ 599
Fair value at end of period		554		$ 599
UNITED STATES
Fair value at beginning of period		530		537
Fair value at end of period		493		530
Foreign Plan [Member]
Fair value at beginning of period		69		59
Fair value at end of period		61		69
Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Fair value at beginning of period		6
Fair value at end of period		5		6
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member]
Fair value at beginning of period		48
Fair value at end of period		45		48
Insurance Contracts [Member]
Fair value at beginning of period	[1]	54
Fair value at end of period	[1]	50		54
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Fair value at beginning of period		6	[1]	6
Purchases, sales and settlements		(1)
Fair value at end of period	[1]	5		6
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member]
Fair value at beginning of period		48	[1]	43
Actual gains relating to assets still held at the reporting date		2		5
Purchases, sales and settlements		(2)		(1)
Currency impact		(3)		1
Fair value at end of period	[1]	$ 45		$ 48

[1] This category comprises contracts placed with insurance companies where the underlying assets are invested in fixed interest securities.