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Condensed Consolidated Statements of Changes in Equity (Parenthetical) (Unaudited) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Common stock per share $ 0.48 $ 0.45
Sale of interests in investments, net of tax $ 16  
Class H Depositary Share    
Common stock per share $ 0.8625 0.8625
Class I Depositary Share    
Common stock per share 0.7500 0.7500
Class J Depositary Share    
Common stock per share 0.6875 0.6875
Class K Depositary Share    
Common stock per share $ 0.7032 $ 0.7032