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Note 20 - Retirement Plans - Reconciliation of Beginning and Ending Balances of Assets Measured With Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Major US Plans [Member]      
Fair value of plan assets at beginning of period $ 4,105    
Fair value of plan assets at end of period 3,659 $ 4,105  
Major US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 0 5 $ 7
Net Realized and Unrealized Gains Relating to Assets Still Held 0 (5) (2)
Net Purchases, Sales and Settlements 3 0 0
Fair value of plan assets at end of period 3 0 5
Major US Plans [Member] | Private Equity Funds [Member]      
Fair value of plan assets at beginning of period 1,082    
Fair value of plan assets at end of period 1,095 1,082  
Major US Plans [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 0 5 7
Net Realized and Unrealized Gains Relating to Assets Still Held 0 (5) (2)
Net Purchases, Sales and Settlements 3 0 0
Fair value of plan assets at end of period 3 0 5
Major Non-US Plans [Member]      
Fair value of plan assets at beginning of period 626    
Fair value of plan assets at end of period 526 626  
Major Non-US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 342 291 273
Net Realized and Unrealized Gains Relating to Assets Still Held (53) (37) 18
Net Purchases, Sales and Settlements 0 88 0
Fair value of plan assets at end of period 289 342 291
Major Non-US Plans [Member] | Private Equity Funds [Member]      
Fair value of plan assets at beginning of period 42    
Fair value of plan assets at end of period 43 42  
Major Non-US Plans [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 0    
Fair value of plan assets at end of period 0 0  
Major Non-US Plans [Member] | Insurance Contracts [Member]      
Fair value of plan assets at beginning of period 382    
Fair value of plan assets at end of period 318 382  
Major Non-US Plans [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 342 291 273
Net Realized and Unrealized Gains Relating to Assets Still Held (53) (37) 18
Net Purchases, Sales and Settlements 0 88 0
Fair value of plan assets at end of period $ 289 $ 342 $ 291