Restructuring Costs - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Transaction and transformation	$ 386	$ 181	$ (806)
Transformation Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, description	In the fourth quarter of 2021, the Company initiated a three-year ‘Transformation program’ designed to enhance operations, optimize technology and align its real estate footprint to its new ways of working.
Restructuring, Expected future effects	$ 1,125
Transaction and transformation	347	$ 136	$ 0
Transformation Program [Member] | Projected Annual Cost Savings by End of 2024 [Member]
Restructuring Cost and Reserve [Line Items]
Annual cost savings of program	425
Transformation Program [Member] | Cumulative Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, Expected future effects	995
Transformation Program [Member] | Capital Expenditures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, Expected future effects	$ 130