Note 12 - Employee Retirement Plans - Domestic Defined Benefit Plan Assets (Details) - UNITED STATES - Pension Plan and Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Fair value of plan assets		$ 2,688	$ 3,607
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		491	584
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		2,166	2,972
Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		31	51
Defined Benefit Plan, Equity Securities, US [Member]
Fair value of plan assets		1,168	977
Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		63	20
Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		1,105	957
Defined Benefit Plan, Equity Securities, Non-US [Member]
Fair value of plan assets			234
Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets			234
US Treasury Securities [Member]
Fair value of plan assets		400	256
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		400	256
Debt Security, Corporate, US [Member]
Fair value of plan assets		1,060	1,770
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		1,060	1,770
Preferred Stock [Member]
Fair value of plan assets		1	11
Preferred Stock [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		1	11
Private Equity Funds [Member]
Fair value of plan assets	[1]	24	41
Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	[1]	24	41
Defined Benefit Plan, Real Estate [Member]
Fair value of plan assets	[2]	7	10
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	[2]	7	10
Defined Benefit Plan, Cash and Cash Equivalents [Member]
Fair value of plan assets		28	308
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		$ 28	$ 308

[1] This category includes venture capital, leverage buyouts and distressed debt limited partnerships invested primarily in U.S. companies. The inputs are valuedby discounted cash flow analysis and comparable sale analysis.

[2] This category includes industrial, office, apartments, hotels, infrastructure and retail investments which are limited partnerships predominately in the U.S. The inputs are valued by discounted cash flow analysis; comparable sale analysis and periodic external appraisals.