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Condensed Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Receivables, allowance for doubtful accounts	$ 73	$ 74
Property, accumulated depreciation	$ 4,696	$ 4,805

- 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.

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