Employee Benefits - Schedule of Components of Net Periodic (Benefit) Cost (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
U.K.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0		$ 0	$ 0
Interest cost	37	38		108	110
Expected return on plan assets, net of administration expenses	(48)	(49)		(142)	(143)
Amortization of prior-service cost	1	1		2	2
Amortization of net actuarial loss	21	19		62	56
Net periodic (benefit) cost	11	9		30	25
Loss on pension settlement	0	0		0	0
Total net periodic (benefit) cost	11	9		30	25
Other
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0		0	0
Interest cost	10	10		29	30
Expected return on plan assets, net of administration expenses	(14)	(12)		(41)	(36)
Amortization of prior-service cost	0	0		0	0
Amortization of net actuarial loss	4	3		10	10
Net periodic (benefit) cost	0	1		(2)	4
Loss on pension settlement	0	0	$ 27	0	27
Total net periodic (benefit) cost	0	1		(2)	31
U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0		0	0
Interest cost	23	26		69	78
Expected return on plan assets, net of administration expenses	(33)	(29)		(101)	(89)
Amortization of prior-service cost	0	0		0	0
Amortization of net actuarial loss	7	8		22	25
Net periodic (benefit) cost	(3)	5		(10)	14
Loss on pension settlement	0	0		0	0
Total net periodic (benefit) cost	$ (3)	$ 5		$ (10)	$ 14