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Reinsurance (Tables) | 9 Months Ended
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Sep. 30, 2018
Reinsurance Disclosures [Abstract] |
Schedule of reductions to premiums and contract charges due to reinsurance premium ceded amounts |
Effects of reinsurance ceded on property and casualty premiums earned and life premiums and contract charges
($ in millions) |  | Three months ended September 30, |  | Nine months ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Property and casualty insurance premiums earned |  | $ | (260 | ) |  | $ | (245 | ) |  | $ | (756 | ) |  | $ | (745 | )
Life premiums and contract charges |  | (76 | ) |  | (75 | ) |  | (221 | ) |  | (225 | )
Schedule of reductions to costs and expenses due to reinsurance ceded amounts |
Effects of reinsurance ceded on property and casualty insurance claims and claims expense, life contract benefits and interest credited to contractholder funds
($ in millions) |  | Three months ended September 30, |  | Nine months ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Property and casualty insurance claims and claims expense (1) |  | $ | (247 | ) |  | $ | (1,268 | ) |  | $ | (572 | ) |  | $ | (1,523 | )
Life contract benefits |  | (35 | ) |  | (47 | ) |  | (150 | ) |  | (164 | )
Interest credited to contractholder funds |  | (5 | ) |  | (6 | ) |  | (16 | ) |  | (17 | )
(1) | Includes expected reinsurance recoveries on catastrophe losses related to homeowners flood claims covered by the National Flood Insurance Program.

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