Fair Value (Details) $ in Millions | 9 Months Ended | 12 Months Ended |
Sep. 30, 2015USD ($)fund | Sep. 30, 2014USD ($) | Dec. 31, 2014USD ($)fund |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | $ 10,720 | | $ 10,446 |
Other investments: | | | |
Contributions made to the funds | 101 | $ 82 | |
Distributions received from the funds | 176 | $ 100 | |
Fair value measurements on a recurring basis | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Total | $ 13,754 | | $ 13,748 |
% of total assets at fair value | 100.00% | | 100.00% |
Fair value measurements on a recurring basis | Level 1 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Total | $ 3,388 | | $ 3,691 |
% of total assets at fair value | 24.60% | | 26.90% |
Fair value measurements on a recurring basis | Level 2 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Total | $ 10,165 | | $ 9,863 |
% of total assets at fair value | 73.90% | | 71.70% |
Fair value measurements on a recurring basis | Level 3 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Total | $ 201 | | $ 194 |
% of total assets at fair value | 1.50% | | 1.40% |
Fair value measurements on a recurring basis | Level 3 | Real estate | | | |
Other investments: | | | |
Number of real estate funds reported under fair value option | fund | 4 | | 4 |
Indemnity | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | $ 608 | | $ 589 |
Indemnity | Fair value measurements on a recurring basis | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 608 | | 589 |
Total | 613 | | 597 |
Indemnity | Fair value measurements on a recurring basis | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 588 | | 564 |
Indemnity | Fair value measurements on a recurring basis | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 237 | | 231 |
Indemnity | Fair value measurements on a recurring basis | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 245 | | 234 |
Indemnity | Fair value measurements on a recurring basis | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 11 | | 8 |
Indemnity | Fair value measurements on a recurring basis | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 44 | | 51 |
Indemnity | Fair value measurements on a recurring basis | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 46 | | 33 |
Indemnity | Fair value measurements on a recurring basis | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 5 | | 7 |
Indemnity | Fair value measurements on a recurring basis | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 8 | | 12 |
Indemnity | Fair value measurements on a recurring basis | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 12 | | 13 |
Indemnity | Fair value measurements on a recurring basis | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 5 | | 8 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 13 | | 15 |
Total | 13 | | 15 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 1 | | 2 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 12 | | 13 |
Indemnity | Fair value measurements on a recurring basis | Level 1 | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 590 | | 574 |
Total | 590 | | 574 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 583 | | 564 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 237 | | 231 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 245 | | 234 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 11 | | 8 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 44 | | 51 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 41 | | 33 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 5 | | 7 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 7 | | 10 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 2 | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 5 | | 0 |
Total | 10 | | 8 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 5 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 5 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Indemnity | Fair value measurements on a recurring basis | Level 3 | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 5 | | 8 |
Other investments: | | | |
Contributions made to the funds | 0 | | 0 |
Distributions received from the funds | 3.1 | | 12.9 |
Unfunded commitments | 0.6 | | 0.6 |
Exchange | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 10,112 | | 9,857 |
Exchange | Fair value measurements on a recurring basis | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 10,112 | | 9,857 |
Trading securities | 2,981 | | 3,223 |
Total | 13,141 | | 13,151 |
Exchange | Fair value measurements on a recurring basis | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 9,392 | | 9,007 |
Exchange | Fair value measurements on a recurring basis | U.S. treasury | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 8 | | 6 |
Exchange | Fair value measurements on a recurring basis | Government sponsored enterprises | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 4 | | 4 |
Exchange | Fair value measurements on a recurring basis | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 1,476 | | 1,477 |
Exchange | Fair value measurements on a recurring basis | Foreign government securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 86 | | 10 |
Exchange | Fair value measurements on a recurring basis | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 7,657 | | 7,289 |
Exchange | Fair value measurements on a recurring basis | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 30 | | 111 |
Exchange | Fair value measurements on a recurring basis | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 29 | | 30 |
Exchange | Fair value measurements on a recurring basis | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 11 | | 11 |
Exchange | Fair value measurements on a recurring basis | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 91 | | 69 |
Exchange | Fair value measurements on a recurring basis | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 623 | | 710 |
Exchange | Fair value measurements on a recurring basis | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 97 | | 140 |
Trading securities | 2,981 | | 3,223 |
Exchange | Fair value measurements on a recurring basis | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 48 | | 71 |
Exchange | Fair value measurements on a recurring basis | Level 1 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 407 | | 468 |
Trading securities | 2,968 | | 3,208 |
Total | 3,375 | | 3,676 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | U.S. treasury | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Government sponsored enterprises | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Foreign government securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 310 | | 328 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 97 | | 140 |
Trading securities | 2,968 | | 3,208 |
Exchange | Fair value measurements on a recurring basis | Level 1 | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 2 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 9,575 | | 9,289 |
Trading securities | 0 | | 0 |
Total | 9,575 | | 9,289 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 9,268 | | 8,908 |
Exchange | Fair value measurements on a recurring basis | Level 2 | U.S. treasury | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 8 | | 6 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Government sponsored enterprises | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 4 | | 4 |
Exchange | Fair value measurements on a recurring basis | Level 2 | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 1,476 | | 1,477 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Foreign government securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 86 | | 10 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 7,544 | | 7,202 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 30 | | 111 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 29 | | 30 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 11 | | 11 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 80 | | 57 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 307 | | 381 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Trading securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 2 | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 130 | | 100 |
Trading securities | 13 | | 15 |
Total | 191 | | 186 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Fixed maturities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 124 | | 99 |
Exchange | Fair value measurements on a recurring basis | Level 3 | U.S. treasury | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Government sponsored enterprises | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | States & political subdivisions | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Foreign government securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Corporate debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 113 | | 87 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Residential mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Commercial mortgage-backed securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Collateralized debt obligations | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Other debt securities | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 11 | | 12 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Nonredeemable preferred stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 6 | | 1 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Common stock | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Available-for-sale securities | 0 | | 0 |
Trading securities | 13 | | 15 |
Exchange | Fair value measurements on a recurring basis | Level 3 | Real estate | | | |
Fair value measurements on a recurring basis by asset class and level of input | | | |
Other investments | 48 | | 71 |
Other investments: | | | |
Contributions made to the funds | 0 | | 0 |
Distributions received from the funds | 28.4 | | 41.5 |
Unfunded commitments | $ 1.7 | | $ 1.7 |
Minimum | Fair value measurements on a recurring basis | Level 3 | Real estate | | | |
Other investments: | | | |
Underlying assets, liquidation period from inception of fund (in years) | 5 years | | 5 years |
Maximum | Fair value measurements on a recurring basis | Level 3 | Real estate | | | |
Other investments: | | | |
Underlying assets, liquidation period from inception of fund (in years) | 10 years | | 10 years |