CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 158	$ 145
Preferred stock- non-redeemable, par value (in dollars per share)	$ 25.00	$ 25.00
Preferred stock- non-redeemable, authorized shares	2,000	2,000
Preferred stock- non-redeemable, issued shares	7	9
Preferred stock- non-redeemable, outstanding shares	7	9
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized shares	1,600,000	800,000
Common stock, issued shares	625,658	618,514
Common stock, outstanding shares	625,658	618,514