Note 12 - Pension and Postretirement Benefit Plans - Fair Value of Pension Plan Assets (Details) - Pension Plan [Member] - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Fair value of plan assets		$ 798		$ 850
UNITED STATES
Fair value of plan assets		733		781		$ 724
UNITED STATES | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		31		40
UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	437		488
UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		259		247
UNITED STATES | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		6		6
Foreign Plan [Member]
Fair value of plan assets		65		69		78
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		14		17
Foreign Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		51		52
Defined Benefit Plan, Equity Securities, US [Member]
Fair value of plan assets	[1],[2],[3]	31		40
Defined Benefit Plan, Equity Securities, US [Member] | UNITED STATES | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[2]	31		40
Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Fair value of plan assets		30		36
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]	30		36
Defined Benefit Plan, Equity Securities, Non-US [Member]
Fair value of plan assets		17		23
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]	17		23
Defined Benefit Plan, Equity Securities, Emerging Markets [Member]
Fair value of plan assets		10		16
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		16
Corporate Debt Securities [Member]
Fair value of plan assets		556		572
Corporate Debt Securities [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	356		383
Corporate Debt Securities [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		200		189
US Treasury Securities [Member]
Fair value of plan assets		24		22
US Treasury Securities [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		24		22
Debt Security, Government, Non-US [Member]
Fair value of plan assets		15		16
Debt Security, Government, Non-US [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		2		1
Debt Security, Government, Non-US [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		13		15
Defined Benefit Plan, Fixed Income Securities, Emerging Markets [Member]
Fair value of plan assets		10		12
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]	10		12
Insurance Contracts [Member]
Fair value of plan assets	[3]	57		58
Insurance Contracts [Member] | UNITED STATES | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		6	[3]	6	[3]	4
Insurance Contracts [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		51	[3]	52	[3]	$ 46
Defined Benefit Plan, Real Estate [Member]
Fair value of plan assets		14		18
Defined Benefit Plan, Real Estate [Member] | UNITED STATES | Fair Value Measured at Net Asset Value Per Share [Member]
Fair value of plan assets	[1]	14		18
Other Securities [Member]
Fair value of plan assets		1		2
Other Securities [Member] | Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		1		2
Defined Benefit Plan, Cash and Cash Equivalents [Member]
Fair value of plan assets		33		35
Defined Benefit Plan, Cash and Cash Equivalents [Member] | UNITED STATES | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		$ 33		$ 35

[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.