Employee Benefits - Reconciliation of the Changes in the Benefit Obligations and Fair Value of Assets and a Statement of the Funded Status (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
U.K.
Change in projected benefit obligation
Balance at the beginning of the Period	$ 2,813	$ 3,233
Service cost	0	0	$ 0
Interest cost	152	145	147
Plan amendment	4	7
Settlements	0	0
Transfers	4	0
Actuarial (gain) loss	(56)	(353)
Benefit payments	(205)	(176)
Foreign currency impact	216	(43)
Balance at the end of the period	2,928	2,813	3,233
Accumulated benefit obligation at end of year	2,928	2,813
Change in fair value of plan assets
Balance at the beginning of the period	3,291	3,775
Actual return on plan assets	139	(261)
Employer Contributions	(43)	4
Settlements	0	0
Transfers	3	0
Benefit payments	(205)	(176)
Foreign currency impact	252	(51)
Balance at the end of the period	3,437	3,291	3,775
Market related value at end of year	3,437	3,291
Funded status	509	478
Unrecognized prior-service cost	48	43
Unrecognized loss	1,893	1,854
Net amount recognized	2,450	2,375
Transfer from defined benefit pension plan to defined contribution plan	47
Other
Change in projected benefit obligation
Balance at the beginning of the Period	1,087	1,129
Service cost	0	0	0
Interest cost	39	39	41
Plan amendment	0	0
Settlements	0	0
Transfers	0	0
Actuarial (gain) loss	8	36
Benefit payments	(47)	(44)
Foreign currency impact	119	(73)
Balance at the end of the period	1,206	1,087	1,129
Accumulated benefit obligation at end of year	1,197	1,077
Change in fair value of plan assets
Balance at the beginning of the period	1,032	1,069
Actual return on plan assets	39	65
Employer Contributions	12	11
Settlements	0	0
Transfers	0	0
Benefit payments	(47)	(44)
Foreign currency impact	116	(69)
Balance at the end of the period	1,152	1,032	1,069
Market related value at end of year	1,152	1,032
Funded status	(54)	(55)
Unrecognized prior-service cost	(6)	(5)
Unrecognized loss	473	419
Net amount recognized	413	359
U.S.
Change in projected benefit obligation
Balance at the beginning of the Period	2,040	2,199
Service cost	0	0	0
Interest cost	102	100	103
Plan amendment	0	0
Settlements	(3)	0
Transfers	0	0
Actuarial (gain) loss	95	(116)
Benefit payments	(151)	(143)
Foreign currency impact	0	0
Balance at the end of the period	2,083	2,040	2,199
Accumulated benefit obligation at end of year	2,083	2,040
Change in fair value of plan assets
Balance at the beginning of the period	1,425	1,499
Actual return on plan assets	150	26
Employer Contributions	83	43
Settlements	(3)	0
Transfers	0	0
Benefit payments	(151)	(143)
Foreign currency impact	0	0
Balance at the end of the period	1,504	1,425	$ 1,499
Market related value at end of year	1,661	1,731
Funded status	(579)	(615)
Unrecognized prior-service cost	0	0
Unrecognized loss	1,304	1,276
Net amount recognized	$ 725	$ 661