Segment Reporting (Narrative) (Details) - Operating Segments [Member] - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Long-lived assets	$ 6,829	$ 6,220	$ 6,620
Switzerland [Member]
Segment Reporting Information [Line Items]
Long-lived assets	900	900	1,000
Indonesia [Member]
Segment Reporting Information [Line Items]
Long-lived assets	800	700	700
Italy [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 700	$ 400	$ 300