Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Accounts and notes receivable allowance	$ 109	$ 119
Common stock, par value	$ 1	$ 1
Common stock, shares	447,200,000	439,900,000
Common stock held in treasury, shares	10,868,000	13,000