XML 16 R33.htm IDEA: XBRL DOCUMENT

Property, Plant And Equipment (Details) (USD $) In Billions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Property, Plant And Equipment [Abstract]
Accumulated depreciation	$ 5.85	$ 5.73

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details