Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for doubtful accounts	$ 61	$ 66
Accumulated depreciation	6,146	6,660
Other Intangibles, Accumulated Amortization	$ 177	$ 146
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	250	250
Common stock, shares issued	106	106
Common stock, shares outstanding	76	76
Treasury Stock	30	30