Reportable Operating Segments and Geographic Operations (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]
Total revenues net of interest expense	$ 42,380	$ 36,087	$ 43,556
Pretax income (loss) from continuing operations	10,689	4,296	8,429
United States
Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]
Total revenues net of interest expense	33,103	28,263	32,629
Pretax income (loss) from continuing operations	9,512	4,418	7,302
EMEA
Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]
Total revenues net of interest expense	3,643	3,087	4,388
Pretax income (loss) from continuing operations	705	398	1,177
APAC Geographic Region
Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]
Total revenues net of interest expense	3,418	3,271	3,934
Pretax income (loss) from continuing operations	707	665	853
LACC Geographic Region
Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]
Total revenues net of interest expense	2,238	2,019	2,776
Pretax income (loss) from continuing operations	782	452	884
Other Unallocated
Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]
Total revenues net of interest expense	(22)	(553)	(171)
Pretax income (loss) from continuing operations	$ (1,017)	$ (1,638)	$ (1,787)