Schedule of Compensation Expense for Each Type of Incentive Award (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 112,432		$ 86,084		$ 53,085
Income Tax Expense (Benefit)	(211,775)		290,488		188,278
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	5,000		3,100		619
Restricted Stock Equity Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	56,165		48,876		32,861
Restricted Stock Liability Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	40,404		22,419		10,882
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	2,952	[1]	4,110	[1]	2,936	[1]
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	9,131		6,162		4,500
Pioneer Southwest Ltip [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	1,029		1,098		761
Sendero B Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	1,020		982		1,020
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	1,731		2,437		125
Compensation Expense For Incentive Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income Tax Expense (Benefit)	$ 36,298		$ 27,901		$ 22,084

[1] (a)Cash proceeds received from stock option exercises during 2013, 2012 and 2011 amounted to $5.0 million, $3.1 million and $619 thousand, respectively.