Employee Benefit Plans - Plan Amendments (Details) £ in Millions, $ in Millions	1 Months Ended			12 Months Ended
	Apr. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 GBP (£)	Nov. 30, 2020 USD ($)	Nov. 30, 2020 GBP (£)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 GBP (£)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, pension award payment, percentage	7.50%
Plan amendment	$ 73
United States of America, Dollars
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reduction of accounted for as an actuarial gain				$ 24
United Kingdom, Pounds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reduction of accounted for as an actuarial gain | £					£ 20
Pension Plan | United States of America, Dollars
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cost of equalization								$ 4		$ 42
Cost before equalization				19
Pension Plan | United Kingdom, Pounds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cost of equalization | £									£ 3		£ 33
Cost before equalization | £							£ 16
Pension Plan | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reduction of accounted for as an actuarial gain				643		$ 86
Plan amendment				0		0
Pension Plan | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reduction of accounted for as an actuarial gain				1,697		233
Plan amendment				72		0
Retiree Health
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reduction of accounted for as an actuarial gain				59		1
Plan amendment				(26)		$ (50)
Retiree Health | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated benefit obligation, increase (decrease) for plan amendment		$ 50	$ 11	$ 30