XML 53 R40.htm IDEA: XBRL DOCUMENT v3.7.0.1
Investments - Fixed Maturities and Equity Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Fixed maturities    
Available-for-sale securities disclosures    
Amortized cost $ 54,986.6 $ 53,184.2
Gross unrealized gains 2,482.4 2,310.7
Gross unrealized losses 479.9 648.8
Fair value 56,989.1 54,846.1
Other-than-temporary impairments in AOCI 144.9 146.4
Net unrealized gains (losses) on impaired fixed maturities, available-for-sale related to changes in fair value subsequent to the impairment date 126.3 120.9
U.S. government and agencies    
Available-for-sale securities disclosures    
Amortized cost 1,430.3 1,426.7
Gross unrealized gains 19.1 17.2
Gross unrealized losses 11.2 10.9
Fair value 1,438.2 1,433.0
Non-U.S. governments    
Available-for-sale securities disclosures    
Amortized cost 881.9 781.7
Gross unrealized gains 126.3 119.3
Gross unrealized losses 3.4 7.4
Fair value 1,004.8 893.6
States and political subdivisions    
Available-for-sale securities disclosures    
Amortized cost 5,854.1 5,463.9
Gross unrealized gains 215.4 192.4
Gross unrealized losses 70.0 87.1
Fair value 5,999.5 5,569.2
Other-than-temporary impairments in AOCI 1.1 1.1
Corporate debt securities    
Available-for-sale securities disclosures    
Amortized cost 33,806.8 32,699.7
Gross unrealized gains 1,988.2 1,843.5
Gross unrealized losses 229.5 350.8
Fair value 35,565.5 34,192.4
Other-than-temporary impairments in AOCI 20.0 17.2
Residential mortgage-backed pass-through securities    
Available-for-sale securities disclosures    
Amortized cost 2,807.4 2,798.0
Gross unrealized gains 63.2 67.3
Gross unrealized losses 30.7 30.6
Fair value 2,839.9 2,834.7
Commercial mortgage-backed securities    
Available-for-sale securities disclosures    
Amortized cost 3,903.8 4,153.2
Gross unrealized gains 29.3 31.2
Gross unrealized losses 70.2 87.9
Fair value 3,862.9 4,096.5
Other-than-temporary impairments in AOCI 74.8 77.5
Collateralized debt obligations    
Available-for-sale securities disclosures    
Amortized cost 1,006.9 780.1
Gross unrealized gains 2.5 2.8
Gross unrealized losses 21.5 24.3
Fair value 987.9 758.6
Other-than-temporary impairments in AOCI 0.3 0.3
Other debt obligations    
Available-for-sale securities disclosures    
Amortized cost 5,295.4 5,080.9
Gross unrealized gains 38.4 37.0
Gross unrealized losses 43.4 49.8
Fair value 5,290.4 5,068.1
Other-than-temporary impairments in AOCI 48.7 50.3
Equity securities    
Available-for-sale securities disclosures    
Amortized cost 116.4 104.9
Gross unrealized gains 6.3 4.9
Gross unrealized losses 8.7 10.9
Fair value $ 114.0 $ 98.9