Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Consolidated Balance Sheet
Trade receivables, allowances (in dollars)	$ 312	$ 406
Preferred shares, par value (in dollars per share)	$ 1	$ 1
Preferred shares, Authorized shares	1,000,000	1,000,000
Preferred shares, issued shares	0	0
Common shares, Authorized shares	2,400,000,000	2,400,000,000
Common shares, Issued shares	1,685,827,096	1,675,930,484
Common shares held in treasury, shares	137,728,810	99,262,992