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Employee Benefit Plans Employee Benefit Plans | 3 Months Ended
--- | ---
Mar. 31, 2018
Retirement Benefits [Abstract] |
Employee Benefit Plans | The Company’s employee benefit plans are described in Note 18 - Employee Benefit Plans of Notes to Consolidated Financial Statements included in The Hartford’s 2017 Annual Report on Form 10-K.
Net Periodic Benefit
| Pension Benefits | Other Postretirement Benefits
| Three Months Ended March 31, | Three Months Ended March 31,
| 2018 | 2017 | 2018 | 2017
Service cost | $ | 1 |  | $ | 1 |  | $ | — |  | $ | — |
Interest cost | 35 |  | 49 |  | 2 |  | 2 |
Expected return on plan assets | (56 | ) | (79 | ) | (2 | ) | (2 | )
Amortization of prior service credit | — |  | — |  | (1 | ) | (1 | )
Amortization of actuarial loss | 12 |  | 15 |  | 1 |  | 1 |
Net periodic benefit | $ | (8 | ) | $ | (14 | ) | $ | — |  | $ | — |

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -URI http://asc.fasb.org/topic&trid=2127225 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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