XML 186 R166.htm IDEA: XBRL DOCUMENT v3.8.0.1
Condensed Financial Information (Parent Company) (Long-term and Short-term Debt Footnote) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 11, 2017
Nov. 01, 2017
Jun. 22, 2017
Condensed Financial Statements, Captions [Line Items]            
Long-term debt outstanding $ 3,612,000 $ 1,910,000        
Interest expense 153,000 175,000 $ 170,000      
Long-term debt maturities, year one 2,000          
Long-term debt maturities, year two 602,000          
Long-term debt maturities, year three 2,000          
Long-term debt maturities, year four 2,000          
Long-term debt maturities, year five 2,000          
Long-term debt maturities, after year five $ 3,000,000          
Senior Notes Due 2027            
Condensed Financial Statements, Captions [Line Items]            
Debt instrument, stated interest rate 3.70%         3.70%
Long-term debt outstanding $ 1,489,000 0        
Senior Notes Due 2047            
Condensed Financial Statements, Captions [Line Items]            
Debt instrument, stated interest rate 4.70%         4.70%
Long-term debt outstanding $ 1,477,000 0        
Term Loan Due 2019            
Condensed Financial Statements, Captions [Line Items]            
Long-term debt outstanding $ 600,000 0        
Debt instrument, basis spread on variable rate debt 1.50%          
Parent Company            
Condensed Financial Statements, Captions [Line Items]            
Long-term debt outstanding $ 3,566,000 0        
Short-term debt outstanding 136,000 0   $ 56,000 $ 80,000  
Long-term and short-term debt outstanding 3,702,071 0        
Debt instrument, unamortized debt issuance costs and debt discount 34,000          
Interest expense 75,000          
Long-term debt maturities, year one 136,000          
Long-term debt maturities, year two 600,000          
Long-term debt maturities, year three 0          
Long-term debt maturities, year four 0          
Long-term debt maturities, year five 0          
Long-term debt maturities, after year five $ 3,000,000          
Weighted average interest rate 0.73%          
Maximum borrowing and lending limit applied to the respective insurance subsidiary's statutory admitted assets 3.00%          
Parent Company | Senior Notes Due 2027            
Condensed Financial Statements, Captions [Line Items]            
Debt instrument, stated interest rate 3.70%          
Long-term debt outstanding $ 1,489,000 0        
Parent Company | Senior Notes Due 2047            
Condensed Financial Statements, Captions [Line Items]            
Debt instrument, stated interest rate 4.70%          
Long-term debt outstanding $ 1,477,000 0        
Parent Company | Term Loan Due 2019            
Condensed Financial Statements, Captions [Line Items]            
Long-term debt outstanding $ 600,000 $ 0        
Debt instrument, basis spread on variable rate debt 1.50%