CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Common shares, par value	$ 1.25	$ 1.25
Common shares, authorized	1,360,000,000	1,360,000,000
Common shares, issued	542,392,642	536,425,400
Common shares, outstanding	542,392,642	536,425,400
Forest Products:
Receivables, allowances	$ 3	$ 6
Property and equipment, accumulated depreciation	6,350	6,550
Real Estate:
Receivables, discounts and allowances	$ 4	$ 2