XML 79 R56.htm IDEA: XBRL DOCUMENT v3.22.4
Note 5 - Pension and Other Postretirement Benefits - Changes in PBO and Plan Assets (Details) - Pension Plan [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Projected benefit obligation at beginning of year $ 5,296 $ 5,658  
Service cost 93 110 $ 91
Interest cost 123 104 137
Actuarial (gain)/loss (1,557) (346)  
Gross benefits paid (230) (230)  
Projected benefit obligation at end of year 3,725 5,296 5,658
Fair value of plan assets at beginning of year 5,554 5,016  
Actual (loss)/return on plan assets (992) 737  
Non-qualified plan benefit contributions 31 31  
Fair value of plan assets at end of year 4,363 5,554 $ 5,016
Funded status at end of year $ 638 $ 258