Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 63	$ 61
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	6,274	6,146
Finite-Lived Intangible Assets, Accumulated Amortization	$ 187	$ 177
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	250	250
Common Stock, Shares, Issued	107	106
Common Stock, Shares, Outstanding	77	76
Treasury Stock, Shares	30	30