XML 1194 R167.htm IDEA: XBRL DOCUMENT v3.8.0.1
Long-term and Short-term Debt (Long-term and Short-term Outstanding) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net $ (95) $ (103)
Capital lease obligations 5 8
Long Term Debt Excluding Consolidated Securitization Entities Face Value 15,775 16,532
Long-term debt 15,680 16,429
Short-term debt 477 242
Debt And Capital Lease Obligations Face Value 16,252 16,774
Total $ 16,157 16,671
Senior notes    
Debt Instrument [Line Items]    
Weighted Average Interest Rate 4.84%  
Debt Instrument, Maturity Date Range, Start Aug. 15, 2018  
Debt Instrument, Maturity Date Range, End May 13, 2046  
Long-term Debt, Gross $ 14,685 15,597
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net (86) (92)
Long-term Debt $ 14,599 15,505
Surplus notes    
Debt Instrument [Line Items]    
Weighted Average Interest Rate 7.79%  
Debt Instrument, Maturity Date Range, Start Jan. 15, 2024  
Debt Instrument, Maturity Date Range, End Nov. 01, 2025  
Long-term Debt, Gross $ 507 507
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net (5) (6)
Long-term Debt $ 502 501
Other notes (2)    
Debt Instrument [Line Items]    
Weighted Average Interest Rate 4.56%  
Debt Instrument, Maturity Date Range, Start Jul. 07, 2018  
Debt Instrument, Maturity Date Range, End Jan. 28, 2058  
Long-term Debt, Gross $ 578 420
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net (4) (5)
Long-term Debt 574 415
Capital Lease Obligations [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net 0 0
Short-term Debt [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net $ 0 $ 0
Minimum | Senior notes    
Debt Instrument [Line Items]    
Interest Rate Range Minimum 3.00%  
Minimum | Surplus notes    
Debt Instrument [Line Items]    
Interest Rate Range Minimum 7.63%  
Minimum | Other notes (2)    
Debt Instrument [Line Items]    
Interest Rate Range Minimum 2.20%  
Maximum | Senior notes    
Debt Instrument [Line Items]    
Interest Rate Range Minimum 7.72%  
Maximum | Surplus notes    
Debt Instrument [Line Items]    
Interest Rate Range Minimum 7.88%  
Maximum | Other notes (2)    
Debt Instrument [Line Items]    
Interest Rate Range Minimum 7.29%