Note 21 - Condensed Combined Debtor-In-Possession Financial Information (Detail) - Debtors’ Statement Of Financial Position (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, plant and equipment, accumulated depreciation (in Dollars)	$ 4,289	$ 4,412
Common stock, par value (in Dollars per share)	$ 2.50	$ 2.50
Condensed Statement of Financial Position [Member]
Property, plant and equipment, accumulated depreciation (in Dollars)	$ 3,275	$ 3,294
Common stock, par value (in Dollars per share)	$ 2.50