Segment and Geographic Area Information - Reconciliation of Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Assets	$ 74,438	$ 75,196
Operating Segments
Segment Reporting Information [Line Items]
Total Assets	22,337	21,174	$ 20,955
Segment Reconciling Items
Segment Reporting Information [Line Items]
Cash and investments	10,936	11,065
Goodwill and intangible assets	33,253	35,970
All other	7,912	6,987
Segment Reconciling Items | Defined Benefit Plans
Segment Reporting Information [Line Items]
All other	$ 3,200	$ 2,270