XML 81 R63.htm IDEA: XBRL DOCUMENT v3.24.0.1
Employee Postretirement Benefits (Components of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Pension Plans      
Service cost $ 13 $ 16 $ 21
Interest cost 121 89 80
Expected return on plan assets [1] (128) (123) (132)
Recognized net actuarial (gain) loss 39 34 37
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment (35) (52) (89)
Other 0 1 (5)
Net periodic benefit cost 80 69 90
Other Postretirement Benefit Plans      
Service cost 4 7 8
Interest cost 30 21 19
Expected return on plan assets [1] 0 0 0
Recognized net actuarial (gain) loss (3) 1 1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 0 0
Other 1 (1) (2)
Net periodic benefit cost $ 32 $ 28 $ 26
[1] The expected return on plan assets is determined by multiplying the fair value of plan assets at the remeasurement date, typically the prior year-end adjusted for estimated current year cash benefit payments and contributions, by the expected long-term rate of return.