v2.4.0.8
Debt Senior Notes (Details) (USD $)
0 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended
May 17, 2011
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Notes Payable, Other Payables [Member]
Senior Notes, 5.875% Due 2019 [Member]
Dec. 31, 2013
Notes Payable, Other Payables [Member]
Senior Notes, 5.875% Due 2019 [Member]
May 17, 2011
Notes Payable, Other Payables [Member]
Senior Notes, 5.875% Due 2019 [Member]
Jun. 30, 2014
Notes Payable, Other Payables [Member]
Senior Notes, 6.125% Due 2021 [Member]
Dec. 31, 2013
Notes Payable, Other Payables [Member]
Senior Notes, 6.125% Due 2021 [Member]
May 17, 2011
Notes Payable, Other Payables [Member]
Senior Notes, 6.125% Due 2021 [Member]
Feb. 14, 2013
Notes Payable, Other Payables [Member]
Senior Notes, 5.000% Due 2023 [Member]
Jun. 30, 2014
Notes Payable, Other Payables [Member]
Senior Notes, 5.000% Due 2023 [Member]
Dec. 31, 2013
Notes Payable, Other Payables [Member]
Senior Notes, 5.000% Due 2023 [Member]
Jun. 30, 2014
Notes Payable, Other Payables [Member]
Senior Notes, 4.150% Due 2024 [Member]
Mar. 03, 2014
Notes Payable, Other Payables [Member]
Senior Notes, 4.150% Due 2024 [Member]
Debt Instrument [Line Items]                                
Senior notes issued               $ 500,000,000       $ 800,000,000       $ 700,000,000
Senior Notes Interest Rate at Period End             5.875% 5.875% 6.125% 6.125% 6.125% 5.00% 5.00% 5.00% 4.15% 4.15%
Debt Instrument, Maturity Date           May 15, 2019 May 15, 2019   May 15, 2021 May 15, 2021     Feb. 15, 2023 Feb. 15, 2023 Mar. 15, 2024  
Loss on extinguishment of debt   0 0 (34,000,000) (39,000,000) (33,000,000)                    
Payments of Debt Issuance Costs 23,000,000                     12,000,000     6,000,000  
Senior Notes Net Proceeds $ 1,000,000,000                              
Debt Instrument, Price                               99.649%
Debt Instrument, Interest Rate, Effective Percentage                               4.193%