v3.3.1.900
Debt Senior Unsecured Notes (Details)
€ in Millions
3 Months Ended 12 Months Ended
Nov. 19, 2015
USD ($)
Mar. 10, 2015
USD ($)
Mar. 03, 2014
USD ($)
Feb. 14, 2013
USD ($)
May. 17, 2011
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Mar. 10, 2015
EUR (€)
Debt Instrument [Line Items]                    
Debt Issuance Costs         $ 23,000,000          
Senior Notes Net Proceeds         1,000,000,000          
Loss on extinguishment of debt           $ (34,000,000) $ (58,000,000) $ (34,000,000) $ (39,000,000)  
Notes Payable, Other Payables | Senior Notes, 5.875% Due 2019                    
Debt Instrument [Line Items]                    
Senior notes issued         $ 500,000,000          
Debt Instrument, Interest Rate, Stated Percentage         5.875%          
Debt Instrument, Maturity Date             May 15, 2019      
Loss on extinguishment of debt               $ (33,000,000)    
Notes Payable, Other Payables | Senior Notes, 6.125% Due 2021                    
Debt Instrument [Line Items]                    
Senior notes issued         $ 500,000,000          
Debt Instrument, Interest Rate, Stated Percentage         6.125%   6.125%      
Debt Instrument, Maturity Date             May 15, 2021      
Loss on extinguishment of debt             $ (52,000,000)      
Notes Payable, Other Payables | Senior Notes, 5.00% Due 2023                    
Debt Instrument [Line Items]                    
Senior notes issued       $ 800,000,000            
Debt Instrument, Interest Rate, Stated Percentage       5.00%     5.00%      
Debt Instrument, Maturity Date       Feb. 15, 2023     Feb. 15, 2023      
Debt Issuance Costs       $ 12,000,000            
Notes Payable, Other Payables | Senior Notes, 4.150% Due 2024                    
Debt Instrument [Line Items]                    
Senior notes issued     $ 700,000,000              
Debt Instrument, Interest Rate, Stated Percentage     4.15%       4.15%      
Debt Instrument, Maturity Date     Mar. 15, 2024       Mar. 15, 2024      
Debt Issuance Costs     $ 6,000,000              
Debt Instrument, Price     99.649%              
Debt Instrument, Interest Rate, Effective Percentage     4.193%              
Notes Payable, Other Payables | Euro-Denominated Senior Notes, 1.50% Due 2025                    
Debt Instrument [Line Items]                    
Debt Instrument, Interest Rate, Stated Percentage             1.50%     1.50%
Debt Instrument, Maturity Date   Mar. 10, 2025         Mar. 10, 2025      
Debt Issuance Costs   $ 5,000,000                
Debt Instrument, Price                   99.54%
Debt Instrument, Interest Rate, Effective Percentage                   1.55%
Notes Payable, Other Payables | 2015 Senior Notes                    
Debt Instrument [Line Items]                    
Senior notes issued $ 1,300,000,000                  
Debt Issuance Costs 8,000,000                  
Notes Payable, Other Payables | Senior Notes, 3.15% Due 2020                    
Debt Instrument [Line Items]                    
Senior notes issued $ 650,000,000                  
Debt Instrument, Interest Rate, Stated Percentage 3.15%           3.15%      
Debt Instrument, Maturity Date Nov. 19, 2020           Nov. 19, 2020      
Debt Instrument, Price 99.784%                  
Debt Instrument, Interest Rate, Effective Percentage 3.197%                  
Notes Payable, Other Payables | Senior Notes, 4.25% Due 2026                    
Debt Instrument [Line Items]                    
Senior notes issued $ 650,000,000                  
Debt Instrument, Interest Rate, Stated Percentage 4.25%           4.25%      
Debt Instrument, Maturity Date Jan. 15, 2026           Jan. 15, 2026      
Debt Instrument, Price 99.942%                  
Debt Instrument, Interest Rate, Effective Percentage 4.256%                  
Designated as Hedging Instrument | Net Investment Hedging | Notes Payable, Other Payables | Euro-Denominated Senior Notes, 1.50% Due 2025                    
Debt Instrument [Line Items]                    
Senior notes issued | €                   € 700