Stockholders' Equity, Dividend distributions (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2015
Summary of dividend payments [Abstract]
Dividend per ordinary share (per share)	$ 0.78	$ 0.78	$ 0.7	$ 2.26
Aggregate dividends paid	$ 361	$ 368	$ 334	$ 1,063
Date of record	Aug. 25, 2015	Jun. 01, 2015	Mar. 02, 2015