XML 22 R33.htm IDEA: XBRL DOCUMENT

Reorganization under Chapter 11 of the United States Bankruptcy Code - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	Mar. 23, 2012	Sep. 25, 2008
Emergence From Chapter Eleven [Line Items]
Assets sold of WMB in exchange for payment		$ 1.88
Amount of cash and other assets distributed by trust under plan	$ 6.5

Amount of reorganization value related to estimated net realizable value of asset dispositions. Reorganization value is the amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

+ References+ Details