XML 125 R115.htm IDEA: XBRL DOCUMENT v3.24.3
Employee Benefit Plans (Components of Provision for Net Periodic Benefit Cost (Credit)) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 19 $ 24 $ 63 $ 72
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]   Other Nonoperating Income (Expense)   Other Nonoperating Income (Expense)
Interest cost 107 $ 111 324 $ 332
Expected return on plan assets (200) (216) (611) (648)
Amortization of prior service cost (credit) 1   1  
Amortization of net actuarial (gain) loss 3   16  
Settlements and curtailments     4  
Plan amendment     22  
Net periodic benefit (credit) cost (70) (81) (181) (244)
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 2 $ 3 8 $ 10
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]   Other Nonoperating Income (Expense)   Other Nonoperating Income (Expense)
Interest cost 15 $ 15 43 $ 46
Expected return on plan assets (43) (37) (128) (113)
Amortization of prior service cost (credit) (9) (10) (27) (28)
Amortization of net actuarial (gain) loss (1) (1) (5) (4)
Settlements and curtailments (1)   (1)  
Net periodic benefit (credit) cost $ (37) $ (30) $ (110) $ (89)