December 31, 2013 | December 31, 2012 | |||||||||||||
Amortized | Fair | Amortized | Fair | |||||||||||
Cost | Value | Cost | Value | |||||||||||
(in millions) | ||||||||||||||
Short-term investments and cash equivalents | $ | 697 | $ | 697 | $ | 938 | $ | 938 | ||||||
Fixed maturities: | ||||||||||||||
Corporate securities | 12,109 | 12,616 | 11,076 | 12,107 | ||||||||||
Commercial mortgage-backed securities | 2,417 | 2,441 | 2,096 | 2,229 | ||||||||||
Residential mortgage-backed securities(1) | 1,857 | 1,830 | 1,965 | 2,026 | ||||||||||
Asset-backed securities(2) | 1,096 | 1,107 | 1,179 | 1,116 | ||||||||||
Foreign government bonds | 579 | 596 | 683 | 708 | ||||||||||
U.S. government authorities and agencies and obligations of U.S. states | 303 | 341 | 369 | 426 | ||||||||||
Total fixed maturities | 18,361 | 18,931 | 17,368 | 18,612 | ||||||||||
Equity securities | 913 | 1,199 | 943 | 1,040 | ||||||||||
Total trading account assets supporting insurance liabilities | $ | 19,971 | $ | 20,827 | $ | 19,249 | $ | 20,590 |