v3.3.1.900
Consolidated Balance Sheet (Parenthetical) - $ / shares
shares in Millions
Dec. 31, 2015
Dec. 31, 2014
Consolidated Balance Sheet [Abstract]    
Common stock, without par value
Common stock, shares authorized 9,000 9,000
Common stock, shares issued 8,019 8,019
Common stock held in treasury, shares 3,863 3,818