CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 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	577,873,544	542,392,642
Common shares, outstanding	577,873,544	542,392,642
Forest Products:
Receivables, allowances	$ 4	$ 3
Property and equipment, accumulated depreciation	6,219	6,350
Real Estate:
Receivables, discounts and allowances	$ 3	$ 4
Preference shares
Preference shares, par value	$ 1.00	$ 1.00
Preference shares, authorized	40,000,000	40,000,000
Preference shares, issued	13,800,000	0
Preference shares, outstanding	13,800,000	0