Segment And Geographic Information (Geographic Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 16,445	$ 16,565	$ 17,186	$ 17,506	$ 20,894	$ 18,117	$ 21,494	$ 20,696	$ 67,702	$ 81,201	$ 89,804
Long-Lived Assets	9,853				9,851				9,853	9,851
UNITED STATES
Segment Reporting Information [Line Items]
Revenues									31,828	39,609	41,427
Long-Lived Assets	6,877				6,601				6,877	6,601
Switzerland [Member]
Segment Reporting Information [Line Items]
Revenues									11,681	10,118	10,467
GERMANY
Segment Reporting Information [Line Items]
Revenues									3,436	7,174	10,029
Other Foreign [Member]
Segment Reporting Information [Line Items]
Revenues									20,757	24,300	$ 27,881
Long-Lived Assets	$ 2,976				$ 3,250				$ 2,976	$ 3,250