Income Taxes (Schedule Of Income Tax (Provision) Benefit Allocation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income tax benefit (provision)	$ 211,775	$ (290,488)	$ (188,278)
Income tax from discontinued operations	250,882	182,437	(267,314)
Changes in goodwill - tax benefits related to stock-based compensation	0	0	40
Net deferred hedge gains	0	(1,725)	8,407
Tax benefits related to stock-based compensation	17,639	58,486	31,087
Income Tax Effects Allocated Directly to Equity, Equity Transactions	38,415	0	0
Deferred tax benefit associated with the Pioneer Southwest merger	200,091
Decrease in noncontrolling interest, tax impact		0	0
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests, Tax Impact	0		0
Deferred tax provision attributable to 2008 Pioneer Southwest initial public offering		(49,072)
Tax attributable to issuance of common units	0	0	(23,711)
Tax on Pioneer Southwest common units sold by the Company on December 12, 2011	$ 0	$ 0	$ (15,381)