Consolidated Statements of Equity Consolidated Statement of Equity Parenthetical - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Issuance costs	$ 12		$ 3
Common Stock, Dividends, Per Share, Declared	$ 1.180	$ 1.115	$ 1.095