Employee Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	May 31, 2023	Nov. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement expense		$ (170)
Pension Plan | U.K.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost			$ 0	$ 0	$ 1
Interest cost			145	147	83
Expected return on plan assets, net of administration expenses			(188)	(190)	(134)
Amortization of prior-service cost			2	2	2
Amortization of net actuarial loss			82	75	29
Net periodic benefit (income) cost			41	34	(19)
Settlement expense			0	0	0
Total net periodic benefit cost (income)			41	34	(19)
Pension Plan | Other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost			0	0	0
Interest cost			39	41	19
Expected return on plan assets, net of administration expenses			(54)	(48)	(33)
Amortization of prior-service cost			0	0	0
Amortization of net actuarial loss			13	13	13
Net periodic benefit (income) cost			(2)	6	(1)
Settlement expense	$ 27		0	27	0
Total net periodic benefit cost (income)			(2)	33	(1)
Pension Plan | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost			0	0	0
Interest cost			100	103	73
Expected return on plan assets, net of administration expenses			(135)	(119)	(108)
Amortization of prior-service cost			0	0	0
Amortization of net actuarial loss			36	34	61
Net periodic benefit (income) cost			1	18	26
Settlement expense			0	0	170
Total net periodic benefit cost (income)			$ 1	$ 18	$ 196