Other Expense (Schedule Of Components Of Other Expense) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Expense [Abstract]
Above market and idle drilling and well services equipment charges	[1]	$ 28	$ 0	$ 51	$ 0
Transportation commitment charges	[2]	13	12	27	22
Restructuring Charges		15	0	15	0
Inventory valuation charges	[3]	3	4	9	4
Other		3	5	8	10
Total other expense		$ 62	$ 21	$ 110	$ 36

[1] Primarily represents expenses attributable to idle drilling rig fees, which are not chargeable to joint operations.

[2] Primarily represents firm transportation payments on excess pipeline capacity commitments.

[3] Represents charges to reduce excess material and supplies inventories to their market values. See Note D for additional information on the fair value of materials and supplies inventory.