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Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
(In millions)June 30, 2015December 31, 2014
Original cost$87,209$84,071
Less accumulated depreciation and amortization(36,170)(35,735)
Property, plant and equipment – net$51,039$48,336