Note 12 - Pension and Postretirement Benefit Plans - Fair Value of Pension Plan Assets (Details) - Pension Plan [Member] - USD ($) $ in Millions		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Fair value of plan assets		$ 599		$ 596
UNITED STATES
Fair value of plan assets		530		537		$ 733
UNITED STATES | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		25		20
UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		241		202
UNITED STATES | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		6		6
UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	258		309
Foreign Plan [Member]
Fair value of plan assets		69		59		65
Foreign Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets				0
Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		21		16
Foreign Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		48		43
Defined Benefit Plan, Equity Securities, US [Member]
Fair value of plan assets	[2]	25		20
Defined Benefit Plan, Equity Securities, US [Member] | UNITED STATES | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[2]	25		20
Defined Benefit Plan, Equity Securities, US [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[2]	0		0
Defined Benefit Plan, Equity Securities, US [Member] | UNITED STATES | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	[2]	0		0
Defined Benefit Plan, Equity Securities, US [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1],[2]	0		0
Defined Benefit Plan, Equity Securities, US [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[2]	0		0
Defined Benefit Plan, Equity Securities, US [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[2]	0		0
Defined Benefit Plan, Equity Securities, US [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	[2]	0		0
Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Fair value of plan assets		26		19
Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	26		19
Defined Benefit Plan, Equity Securities, Non-US [Member]
Fair value of plan assets		14		11
Defined Benefit Plan, Equity Securities, Non-US [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	14		11
Defined Benefit Plan, Equity Securities, Emerging Markets [Member]
Fair value of plan assets		10		9
Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	10		9
Corporate Debt Securities [Member]
Fair value of plan assets		379		414
Corporate Debt Securities [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		190		165
Corporate Debt Securities [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	189		249
US Treasury Securities [Member]
Fair value of plan assets		7		8
US Treasury Securities [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		7		8
Debt Security, Government, Non-US [Member]
Fair value of plan assets		19		16
Debt Security, Government, Non-US [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		2		2
Debt Security, Government, Non-US [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		17		14
Defined Benefit Plan, Fixed Income Securities, Emerging Markets [Member]
Fair value of plan assets		8		7
Defined Benefit Plan, Fixed Income Securities, Emerging Markets [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	8		7
Insurance Contracts [Member]
Fair value of plan assets	[3]	54		49
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets				6
Insurance Contracts [Member] | UNITED STATES | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		6	[3]	6	[3]	6
Insurance Contracts [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		48	[3]	43	[3]	$ 51
Defined Benefit Plan, Real Estate [Member]
Fair value of plan assets		11		14
Defined Benefit Plan, Real Estate [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	11		14
Other Securities [Member]
Fair value of plan assets		4		2
Other Securities [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		4		2
Defined Benefit Plan, Cash and Cash Equivalents [Member]
Fair value of plan assets		42		27
Defined Benefit Plan, Cash and Cash Equivalents [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		$ 42		$ 27

[1] Certain assets are measured at fair value using the net asset value (NAV) per share (or its equivalent) practical expedient and have not been classified in the fair value hierarchy.

[2] This category comprises a combination of small-, mid- and large-cap equity stocks that are allocated at the investment manager's discretion. Investments include common and preferred securities as well as equity funds that invest in these instruments.

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