CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 157	$ 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	9	9
Preferred stock-non-redeemable, outstanding shares	9	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	623,144	618,514
Common stock, outstanding shares	623,144	618,514