Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Detail)

v2.4.0.8
Long-Term Debt (Detail) (USD $)
0 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 0 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended
Sep. 18, 2014
Sep. 30, 2014
Sep. 18, 2014
Dec. 31, 2013
Oct. 16, 2014
Subsequent event
Sep. 30, 2014
Midstream Credit Facility Member
Mar. 31, 2014
Bank credit facility
Sep. 30, 2014
Bank credit facility
Dec. 31, 2013
Bank credit facility
Sep. 30, 2014
Bank credit facility
Minimum
Sep. 30, 2014
Bank credit facility
Maximum
May 23, 2014
7.25% senior notes due 2019
May 23, 2014
7.25% senior notes due 2019
Dec. 31, 2013
7.25% senior notes due 2019
Feb. 04, 2013
6.00% senior notes due 2020
Sep. 30, 2014
6.00% senior notes due 2020
Dec. 31, 2013
6.00% senior notes due 2020
Feb. 04, 2013
6.00% senior notes due 2020
Nov. 19, 2012
6.00% senior notes due 2020
Sep. 30, 2014
6.00% senior notes due 2020
On or after December 1, 2018
Sep. 30, 2014
6.00% senior notes due 2020
On or before December 1, 2015
Sep. 30, 2014
6.00% senior notes due 2020
Prior to December 1, 2015
Sep. 30, 2014
5.375% senior notes due 2021
Dec. 31, 2013
5.375% senior notes due 2021
Nov. 05, 2013
5.375% senior notes due 2021
Sep. 30, 2014
5.375% senior notes due 2021
On or after November 1, 2016
Sep. 30, 2014
5.375% senior notes due 2021
On or after November 1, 2019
Sep. 30, 2014
5.375% senior notes due 2021
Prior to November 1, 2016
Sep. 30, 2014
5.375% senior notes due 2021
On or before November 1, 2016
Sep. 30, 2014
5.375% senior notes due 2021
Prior to May 1, 2015
Sep. 30, 2014
5.375% senior notes due 2021
Maximum
On or before November 1, 2016
Sep. 30, 2014
Net premium
Dec. 31, 2013
Net premium
Mar. 31, 2014
Stand-alone revolving note
Sep. 30, 2014
Stand-alone revolving note
Dec. 31, 2013
Stand-alone revolving note
Sep. 30, 2014
5.125 senior notes due 2022
Sep. 30, 2014
5.125 senior notes due 2022
On or after June 1, 2017
Sep. 30, 2014
5.125 senior notes due 2022
On or before June 1, 2017
Sep. 30, 2014
5.125 senior notes due 2022
Prior to June 1, 2017
Sep. 30, 2014
5.125 senior notes due 2022
On or after June 1, 2020
Sep. 30, 2014
5.125 senior notes due 2022
Prior to December 1, 2015
Long- term Debt                                                                                    
Long-term debt   $ 4,137,866,000   $ 2,078,999,000       $ 1,505,000,000 $ 288,000,000         $ 260,000,000   $ 525,000,000 $ 525,000,000           $ 1,000,000,000 $ 1,000,000,000               $ 7,866,000 $ 5,999,000       $ 1,100,000,000          
Notes Payable, Noncurrent   4,137,866,000   2,078,999,000                                                                            
Interest rate (as a percent)                         7.25%     6.00% 6.00%           5.375% 5.375% 5.375%                       5.125%          
Maximum amount of the Credit Facility         4,000,000,000     3,500,000,000                                                     25,000,000              
Maximum amount of the Credit Facility before amendment         3,500,000,000                                                                          
Current borrowing base         4,000,000,000     3,000,000,000                                                                    
Current borrowing base before amendment         3,000,000,000     2,500,000,000                                                                    
Lender commitments         3,000,000,000 500,000,000                                                                        
Lender commitments before amendment         2,500,000,000                                                                          
Outstanding balance               1,505,000,000 288,000,000                                                   0 0            
Weighted average interest rate (as a percent)               2.44% 1.61%                                                                  
Outstanding letters of credit               332,000,000 32,000,000                                                                  
Commitment fees on the unused portion (as a percent)                   0.375% 0.50%                                                              
Senior notes issued     500,000,000                             225,000,000 300,000,000           1                       600          
Issue price as percentage of par value 100.50%                           103.00%                                                      
Redemption price of the debt instrument in the event of change of control (as a percent)                                           100.00%               110.00%                       110.00%
Percentage of the principal amount of the debt instrument redeemed                                       100.00% 104.50%         104.031% 100.00% 100.00%                   103.844%   100.00% 100.00%  
Percentage of the principal amount of the 2021 notes, plus accrued interest of the debt instrument redeemed                       100.00%                                                            
Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings                                         35.00%                   35.00%               35.00%      
Redemption price of the debt instrument if redeemed with the proceeds of certain equity offerings (as a percent)                                         106.00%               105.375%                   105.125%      
Percentage of principal amount at which notes may be required to be repurchased in event of change of control                               101.00%                           101.00%                       101.00%
Description of variable rate basis             LIBOR or lender's prime rate                                                     lender's prime rate                
Basis spread on variable rate (as a percent)                                                                     1.00%              
Loss on Early Extinguishment of Debt   20,386,000                   17,400,000,000                                                            
Deferred financing costs charged to Loss on Early Extinguishment of Debt                       3,000,000                                                            
Senior notes redeemed                         $ 260,000,000