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Note 19 - Retirement Plans - Reconciliation of Beginning and Ending Balances of Assets Measured With Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair value of plan assets at beginning of period $ 3,546    
Fair value of plan assets at end of period 3,128 $ 3,546  
Major US Plans [Member]      
Fair value of plan assets at beginning of period 3,502    
Fair value of plan assets at end of period 3,012 3,502  
Major US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 3 3 $ 0
Net Realized and Unrealized Gains Relating to Assets Still Held 0 0 0
Net Purchases, Sales and Settlements (3) 0 3
Fair value of plan assets at end of period 0 3 3
Major US Plans [Member] | Private Equity Funds [Member]      
Fair value of plan assets at beginning of period 1,097    
Fair value of plan assets at end of period 167 1,097  
Major US Plans [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 3 3 0
Net Realized and Unrealized Gains Relating to Assets Still Held 0 0 0
Net Purchases, Sales and Settlements (3) 0 3
Fair value of plan assets at end of period 0 3 3
Major Non-US Plans [Member]      
Fair value of plan assets at beginning of period 528    
Fair value of plan assets at end of period 494 528  
Major Non-US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 287 289 342
Net Realized and Unrealized Gains Relating to Assets Still Held (15) (2) (53)
Net Purchases, Sales and Settlements 0 0 0
Fair value of plan assets at end of period 272 287 289
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 28 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 317    
Fair value of plan assets at end of period 298 317  
Major Non-US Plans [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of plan assets at beginning of period 287 289 342
Net Realized and Unrealized Gains Relating to Assets Still Held (15) (2) (53)
Net Purchases, Sales and Settlements 0 0 0
Fair value of plan assets at end of period $ 272 $ 287 $ 289