Segment And Geographic Information (Geographic Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Information
Revenues	$ 85,249	$ 64,355	$ 64,656
Long-Lived Assets	9,803	9,779
UNITED STATES
Segment Information
Revenues	35,396	25,986	27,509
Long-Lived Assets	6,098	6,157
Switzerland [Member]
Segment Information
Revenues	18,453	13,819	13,016
CAYMAN ISLANDS
Segment Information
Revenues	5,515	3,958	4,374
BRAZIL
Segment Information
Revenues	3,213	2,357	2,381
Long-Lived Assets	760	781
MEXICO
Segment Information
Revenues	2,934	2,244	2,068
UNITED KINGDOM
Segment Information
Revenues	1,848	1,519	1,563
Other Foreign [Member]
Segment Information
Revenues	17,890	14,472	$ 13,745
Long-Lived Assets	$ 2,945	$ 2,841