Employee Benefits - Schedule of Components of Net Periodic (Benefit) Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
U.K.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	39	36	76	71
Expected return on plan assets, net of administration expenses	(45)	(47)	(88)	(94)
Amortization of prior-service cost	0	0	1	1
Amortization of net actuarial loss	22	21	44	41
Net periodic cost (benefit)	16	10	33	19
Other
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	10	10	19	19
Expected return on plan assets, net of administration expenses	(14)	(14)	(26)	(27)
Amortization of prior-service cost	0	0	0	0
Amortization of net actuarial loss	4	3	7	6
Net periodic cost (benefit)	0	(1)	0	(2)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	25	23	51	46
Expected return on plan assets, net of administration expenses	(30)	(35)	(60)	(68)
Amortization of prior-service cost	0	0	0	0
Amortization of net actuarial loss	9	8	18	15
Net periodic cost (benefit)	$ 4	$ (4)	$ 9	$ (7)