Employee Benefits - Amounts recognized in the Consolidated Statements of Financial Position (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prepaid pension	$ 652	$ 1,366
Pension Plan | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prepaid pension	0	0
Accrued benefit liability - current	(42)	(52)
Accrued benefit liability - non-current	(657)	(734)
Accumulated other comprehensive loss	1,305	1,551
Net amount recognized	606	765
Pension Plan | U.K.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prepaid pension	612	1,344
Accrued benefit liability - current	(1)	(1)
Accrued benefit liability - non-current	(20)	(16)
Accumulated other comprehensive loss	1,761	1,255
Net amount recognized	2,352	2,582
Pension Plan | Other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prepaid pension	0	0
Accrued benefit liability - current	(5)	(5)
Accrued benefit liability - non-current	(57)	(96)
Accumulated other comprehensive loss	437	483
Net amount recognized	$ 375	$ 382