Annual report [Section 13 and 15(d), not S-K Item 405]

PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 2) - Components of Net Periodic Pension Cost

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PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 2) - Components of Net Periodic Pension Cost - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
UNITED STATES      
Pension and other postretirement benefits      
Defined Benefit Plan, Accumulated Benefit Obligation $ 3,264 $ 3,132  
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation 444 1,007  
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets 6 510  
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation 480 1,042  
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets 6 510  
Components of Net Periodic Benefit Cost      
Service cost 133 142 $ 117
Interest cost 173 167 168
Expected return on plan assets (268) (290) (277)
Amortization of prior service cost 2 2 2
Recognized net actuarial loss (gain) 9 13 8
Defined Benefit Plan and OPEB, Net Periodic Benefit Cost (Credit), Total 49 34 18
Changes in benefit obligations and plan assets recognized in other comprehensive income      
Foreign currency translation adjustments 0 0  
UNITED KINGDOM      
Pension and other postretirement benefits      
Defined Benefit Plan, Accumulated Benefit Obligation 1,431 1,334  
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation 0 0  
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets 0 0  
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation 0 0  
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets 0 0  
Components of Net Periodic Benefit Cost      
Service cost 15 18 17
Interest cost 77 71 70
Expected return on plan assets (91) (102) (105)
Amortization of prior service cost 1 1 1
Recognized net actuarial loss (gain) 27 12  
Defined Benefit Plan and OPEB, Net Periodic Benefit Cost (Credit), Total 29 0 (17)
Changes in benefit obligations and plan assets recognized in other comprehensive income      
Foreign currency translation adjustments 110 (25)  
Pension Plan      
Changes in benefit obligations and plan assets recognized in other comprehensive income      
Amortization of prior service cost (3) (3) (3)
Recognized actuarial (loss) gain (36) (25) (8)
Incurred prior service cost 0 0 1
Incurred actuarial loss (gain) 119 46 432
Total recognized in other comprehensive loss 80 18 422
Total recognized in net periodic pension cost and other comprehensive loss 158 52 423
Other Postretirement Benefit Plan      
Components of Net Periodic Benefit Cost      
Interest cost 6 7 9
Recognized net actuarial loss (gain) (5) (3) (2)
Defined Benefit Plan and OPEB, Net Periodic Benefit Cost (Credit), Total 1 4 7
Changes in benefit obligations and plan assets recognized in other comprehensive income      
Recognized actuarial (loss) gain 5 3 2
Incurred actuarial loss (gain) (13) (19) (2)
Total recognized in other comprehensive loss (8) (16)  
Total recognized in net periodic pension cost and other comprehensive loss $ (7) $ (12) $ 7