Employee Benefits - Components of Net Periodic Benefit Cost (Details) - Pension Plan - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
U.K.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		$ 0	$ 0	$ 0
Interest cost		152	145	147
Expected return on plan assets, net of administration expenses		(180)	(188)	(190)
Amortization of prior-service cost		3	2	2
Amortization of net actuarial loss		90	82	75
Net periodic benefit (income) cost		64	41	34
Settlement expense		0	0	0
Total net periodic benefit cost (income)		64	41	34
Other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		0	0	0
Interest cost		39	39	41
Expected return on plan assets, net of administration expenses		(53)	(54)	(48)
Amortization of prior-service cost		0	0	0
Amortization of net actuarial loss		14	13	13
Net periodic benefit (income) cost		1	(2)	6
Settlement expense	$ 27	0	0	27
Total net periodic benefit cost (income)		1	(2)	33
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		0	0	0
Interest cost		102	100	103
Expected return on plan assets, net of administration expenses		(120)	(135)	(119)
Amortization of prior-service cost		0	0	0
Amortization of net actuarial loss		35	36	34
Net periodic benefit (income) cost		18	1	18
Settlement expense		0	0	0
Total net periodic benefit cost (income)		$ 18	$ 1	$ 18