v3.26.3
Employee Benefits - Schedule of Components of Net Periodic (Benefit) Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
U.K.        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 37 38 110 114
Expected return on plan assets, net of administration expenses (48) (46) (144) (134)
Amortization of prior-service cost 0 1 2 2
Amortization of net actuarial loss 20 23 60 67
Net periodic cost 9 16 28 49
Other        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0 0 0 0
Interest cost 11 10 34 29
Expected return on plan assets, net of administration expenses (15) (13) (45) (39)
Amortization of prior-service cost 0 0 0 0
Amortization of net actuarial loss 4 4 11 11
Net periodic cost 0 1 0 1
U.S.        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0 0 0 0
Interest cost 23 26 70 77
Expected return on plan assets, net of administration expenses (30) (30) (89) (90)
Amortization of prior-service cost 0 0 0 0
Amortization of net actuarial loss 11 8 33 26
Net periodic cost $ 4 $ 4 $ 14 $ 13