XML 1268 R241.htm IDEA: XBRL DOCUMENT v3.8.0.1
Condensed Financial Information (Parent Company) (Long-term Debt - Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Apr. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2015
Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]              
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net         $ 95   $ 103
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months         1,100    
Long-term Debt, Maturities, Repayments of Principal in Year Two         1,000    
Long-term Debt, Maturities, Repayments of Principal in Year Three         540    
Long-term Debt, Maturities, Repayments of Principal in Year Four         999    
Long-term Debt, Maturities, Repayments of Principal in Year Five         846    
Long-term Debt, Maturities, Repayments of Principal after Year Five         11,200    
Parent Company              
Condensed Financial Statements, Captions [Line Items]              
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months         1,000    
Long-term Debt, Maturities, Repayments of Principal in Year Two         1,800    
Long-term Debt, Maturities, Repayments of Principal in Year Three         789    
Long-term Debt, Maturities, Repayments of Principal in Year Four         2,000    
Long-term Debt, Maturities, Repayments of Principal in Year Five         500    
Long-term Debt, Maturities, Repayments of Principal after Year Five         10,500    
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,300          
Debt Instrument, Interest Rate Terms     six-month LIBOR plus 1.00%        
Senior Notes         14,599   15,505
Parent Company | Senior Notes Unaffiliated [Member]              
Condensed Financial Statements, Captions [Line Items]              
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net         86   92
Senior Notes         $ 14,599   $ 15,505
Parent Company | Senior Notes, Affiliated [Member]              
Condensed Financial Statements, Captions [Line Items]              
Senior Notes $ 250            
Debt Instrument, Maturity Date Sep. 30, 2020            
Debt Instrument, Interest Rate, Effective Percentage 3.03%            
MetLife Exchange Trust I [Member] | Parent Company              
Condensed Financial Statements, Captions [Line Items]              
Repayments of affiliated debt   $ 204   $ 10   $ 286  
Debt Instrument, Interest Rate Terms         three-month LIBOR plus 0.7%