Schedule Of Unallocated Items and Eliminations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Share-based plans			$ (94)	$ (101)
Earnings from operations	$ 1,683	$ 1,787	3,702	3,329
Pension Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	(523)	(693)	(1,308)	(1,728)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	(69)	(72)	(161)	(143)
Unallocated items, eliminations and other [Member]
Segment Reporting Information [Line Items]
Share-based plans	(16)	(20)	(37)	(44)
Deferred compensation	10	(26)	(48)	(19)
Amortization of previously capitalized interest	(20)	(18)	(49)	(36)
Eliminations and other unallocated items	(24)	(110)	(164)	(304)
Sub-total	(50)	(174)	(298)	(403)
Pension and Postretirement Expense	(30)	(204)	(143)	(757)
Earnings from operations	(80)	(378)	(441)	(1,160)
Unallocated items, eliminations and other [Member] | Pension Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	(57)	(228)	(209)	(804)
Unallocated items, eliminations and other [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Segment Reporting Information [Line Items]
Pension and Postretirement Expense	$ 27	$ 24	$ 66	$ 47