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, 2022		Dec. 31, 2021
Fair value at beginning of period		$ 798
Fair value at end of period		596		$ 798
UNITED STATES
Fair value at beginning of period		733		781
Fair value at end of period		537		733
Foreign Plan [Member]
Fair value at beginning of period		65		69
Fair value at end of period		59		65
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		51
Fair value at end of period		43		51
Insurance Contracts [Member]
Fair value at beginning of period	[1]	57
Fair value at end of period	[1]	49		57
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Fair value at beginning of period		6	[1]	6
Actual gains (losses) relating to assets still held at the reporting date
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		51	[1]	52
Actual gains (losses) relating to assets still held at the reporting date		(5)		2
Currency impact		(3)		(3)
Fair value at end of period	[1]	$ 43		$ 51

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