INCOME TAXES - Items Excluded from Effective Income Tax Rates (Detail) (USD $) In Millions	3 Months Ended
	Mar. 31, 2011 Income taxes on a non-strategic timberlands gain discussed in Note 8	Jun. 30, 2011 Tax benefit on early extinguishment of debt discussed in Note 11	Sep. 30, 2011 Tax benefit related to foreign tax credits	Jun. 30, 2010 Medicare Part D subsidy charge	Jun. 30, 2010 State tax law and rate changes charge	Sep. 30, 2010 REIT conversion benefit	Sep. 30, 2010 Unrecognized tax benefits and other adjustments	Sep. 30, 2010 Medicare Part D subsidy plan change due to plan amendment
Income Taxes [Line Items]
Income tax credit (charge) that is excluded from the companys effective income tax rate	$ (56)	$ 10	$ 83	$ (28)	$ (3)	$ 1,043	$ (4)	$ (4)