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, 2021		Dec. 31, 2020
Fair value at beginning of period		$ 850
Fair value at end of period		798		$ 850
UNITED STATES
Fair value at beginning of period		781		724
Fair value at end of period		733		781
Foreign Plan [Member]
Fair value at beginning of period		69		78
Fair value at end of period		65		69
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		52
Fair value at end of period		51		52
Insurance Contracts [Member]
Fair value at beginning of period	[1]	58
Fair value at end of period	[1]	57		58
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Fair value at beginning of period		6	[1]	4
Actual gains relating to assets still held at the reporting date				2
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		52	[1]	46
Actual gains relating to assets still held at the reporting date		2		4
Purchases, sales and settlements				(2)
Currency impact		(3)		4
Fair value at end of period	[1]	$ 51		$ 52

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