CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred Stock, Par or Stated Value Per Share	$ 1
Preferred Stock, Shares Authorized	10,000,000
Preferred Stock, Shares Issued	4,070	4,129
Preferred Stock, Shares Outstanding	4,070	4,129
Preferred Stock, Liquidation Preference Per Share	$ 50
Common Stock, Par or Stated Value Per Share	$ 0.1
Common Stock, Shares Authorized	4,500,000,000
Common Stock, Shares Issued	2,200,000,000	2,200,000,000
Treasury Stock, Shares	575,000,000	536,000,000