Consolidated Condensed Balance Sheets (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 165	$ 154
Accumulated depreciation	5,964	5,959
Accumulated amortization	$ 309	$ 267
Common stock, par value (USD per share)	$ 1	$ 1
Common stock, shares authorized (shares)	250,000,000	250,000,000
Common stock, shares issued (shares)	110,000,000	110,000,000
Common stock, shares outstanding (shares)	78,000,000	78,000,000
Treasury stock (shares)	32,000,000	32,000,000