CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Common shares, par value	$ 1.25	$ 1.25
Common shares, authorized	1,360,000,000	1,360,000,000
Common shares, issued	546,572,906	542,392,642
Common shares, outstanding	546,572,906	542,392,642
Forest Products:
Receivables, allowances	$ 4	$ 3
Property and equipment, accumulated depreciation	6,350	6,350
Real Estate:
Receivables, discounts and allowances	$ 4	$ 4