Other Expense (Schedule Of Components Of Other Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Other Expense [Abstract]
Transportation commitment charges	$ 11	[1]	$ 10	[1]
Other	2		4
Contingency and environmental accrual adjustments	2		1
Above market and idle drilling and well services equipment charges	0	[2]	4	[2]
Terminated drilling rig contract charges	0	[3]	1	[3]
Total other expense	$ 15		$ 20

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

[2] (b)Primarily represents expenses attributable to the portion of the Company's contracted rig rates that were above market rates and idle rig fees, neither of which were chargeable to joint operations.

[3] (c)Primarily represents charges to terminate rig contracts that were not required to meet planned activities.