CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Common shares, par value	$ 1.25	$ 1.25
Common shares, authorized	1,360,000,000	1,360,000,000
Common shares, issued	536,425,400	535,975,518
Common shares, outstanding	536,425,000	535,976,000
Forest Products:
Receivables, allowances	$ 6	$ 8
Property and equipment, accumulated depreciation	6,550	6,784
Real Estate:
Receivables, discounts and allowances	$ 2	$ 3