Schedule Of Unallocated Items and Eliminations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Share-based plans			$ (141)	$ (152)
Earnings from operations	$ 2,580	$ 2,119	6,282	5,448
Pension Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	(529)	(715)	(1,837)	(2,443)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	(65)	(71)	(226)	(214)
Unallocated items, eliminations and other [Member]
Segment Reporting Information [Line Items]
Share-based plans	(20)	(22)	(57)	(66)
Deferred compensation	38	(3)	(10)	(22)
Amortization of previously capitalized interest	(21)	(19)	(70)	(55)
Total Other and Eliminations	(160)	(168)	(324)	(472)
Sub-total	(163)	(212)	(461)	(615)
Pension and Postretirement Expense	(57)	(311)	(200)	(1,068)
Earnings from operations	(220)	(523)	(661)	(1,683)
Unallocated items, eliminations and other [Member] | Pension Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	(84)	(331)	(293)	(1,135)
Unallocated items, eliminations and other [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	$ 27	$ 20	$ 93	$ 67