Note 12 - Pension and Postretirement Benefit Plans - Reconciliation of Level 3 Pension Plan Assets (Details) - Pension Plan [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Fair value at beginning of period		$ 596
Fair value at end of period		599		$ 596
UNITED STATES
Fair value at beginning of period		537		733
Fair value at end of period		530		537
Foreign Plan [Member]
Fair value at beginning of period		59		65
Fair value at end of period		69		59
Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Fair value at beginning of period		6
Fair value at end of period		6		6
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member]
Fair value at beginning of period		43
Fair value at end of period		48		43
Insurance Contracts [Member]
Fair value at beginning of period	[1]	49
Fair value at end of period	[1]	54		49
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value at beginning of period		6
Fair value at end of period				6
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Fair value at beginning of period		6	[1]	6
Fair value at end of period	[1]	6		6
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member]
Fair value at beginning of period		43	[1]	51
Actual gains (losses) relating to assets still held at the reporting date		5		(5)
Purchases, sales and settlements		(1)
Currency impact		1		(3)
Fair value at end of period	[1]	$ 48		$ 43

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