CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 155	$ 158
Preferred stock- non-redeemable, par value (in dollars per share)	$ 25.00	$ 25.00
Preferred stock- non-redeemable, authorized shares (shares)	2,000	2,000
Preferred stock- non-redeemable, issued shares (shares)	7	7
Preferred stock- non-redeemable, outstanding shares (shares)	7	7
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized shares (shares)	1,600,000	1,600,000
Common stock, issued shares (shares)	583,637	625,658
Common stock, outstanding shares (shares)	583,637	625,658