(in millions) | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value | ||||||||||||
December 31, 2013 | ||||||||||||||||
Debt securities - available-for-sale: | ||||||||||||||||
U.S. government and agency obligations | $ | 2,211 | $ | 5 | $ | (21 | ) | $ | 2,195 | |||||||
State and municipal obligations | 6,902 | 147 | (72 | ) | 6,977 | |||||||||||
Corporate obligations | 7,265 | 130 | (60 | ) | 7,335 | |||||||||||
U.S. agency mortgage-backed securities | 2,256 | 23 | (61 | ) | 2,218 | |||||||||||
Non-U.S. agency mortgage-backed securities | 697 | 12 | (7 | ) | 702 | |||||||||||
Total debt securities - available-for-sale | 19,331 | 317 | (221 | ) | 19,427 | |||||||||||
Equity securities - available-for-sale | 1,576 | 9 | (13 | ) | 1,572 | |||||||||||
Debt securities - held-to-maturity: | ||||||||||||||||
U.S. government and agency obligations | 181 | 1 | — | 182 | ||||||||||||
State and municipal obligations | 28 | — | — | 28 | ||||||||||||
Corporate obligations | 334 | — | — | 334 | ||||||||||||
Total debt securities - held-to-maturity | 543 | 1 | — | 544 | ||||||||||||
Total investments | $ | 21,450 | $ | 327 | $ | (234 | ) | $ | 21,543 | |||||||
December 31, 2012 | ||||||||||||||||
Debt securities - available-for-sale: | ||||||||||||||||
U.S. government and agency obligations | $ | 2,501 | $ | 38 | $ | (1 | ) | $ | 2,538 | |||||||
State and municipal obligations | 6,282 | 388 | (3 | ) | 6,667 | |||||||||||
Corporate obligations | 6,930 | 283 | (4 | ) | 7,209 | |||||||||||
U.S. agency mortgage-backed securities | 2,168 | 70 | — | 2,238 | ||||||||||||
Non-U.S. agency mortgage-backed securities | 538 | 36 | — | 574 | ||||||||||||
Total debt securities - available-for-sale | 18,419 | 815 | (8 | ) | 19,226 | |||||||||||
Equity securities - available-for-sale | 668 | 10 | (1 | ) | 677 | |||||||||||
Debt securities - held-to-maturity: | ||||||||||||||||
U.S. government and agency obligations | 168 | 6 | — | 174 | ||||||||||||
State and municipal obligations | 30 | — | — | 30 | ||||||||||||
Corporate obligations | 641 | 2 | — | 643 | ||||||||||||
Total debt securities - held-to-maturity | 839 | 8 | — | 847 | ||||||||||||
Total investments | $ | 19,926 | $ | 833 | $ | (9 | ) | $ | 20,750 |