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Reserve for Unpaid Losses and Loss Adjustment Expenses Level 1 (Notes) | 6 Months Ended
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Jun. 30, 2017
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract] |
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] | Property and Casualty Insurance Products Roll-forward of Liabilities for Unpaid Losses and Loss Adjustment Expenses
| For the six months ended June 30,
| 2017 | 2016
Beginning liabilities for unpaid losses and loss adjustment expenses, gross | $ | 21,833 |  | $ | 21,825 |
Reinsurance and other recoverables | 2,776 |  | 2,882 |
Beginning liabilities for unpaid losses and loss adjustment expenses, net | 19,057 |  | 18,943 |
Provision for unpaid losses and loss adjustment expenses |  |  |  |
Current accident year | 3,563 |  | 3,447 |
Prior accident year development | 2 |  | 384 |
Total provision for unpaid losses and loss adjustment expenses | 3,565 |  | 3,831 |
Less: payments |  |  |  |
Current accident year | 1,009 |  | 1,066 |
Prior accident years | 2,292 |  | 2,550 |
Total payments | 3,301 |  | 3,616 |
Ending liabilities for unpaid losses and loss adjustment expenses, net | 19,321 |  | 19,158 |
Reinsurance and other recoverables [1] | 2,809 |  | 2,746 |
Ending liabilities for unpaid losses and loss adjustment expenses, gross | $ | 22,130 |  | $ | 21,904 |
[1] | Includes reinsurance recoverables of $2,350 and $2,461 for the six months ended June 30, 2017 and 2016, respectively.
(Favorable) Unfavorable Prior Accident Year Development
| For the six months ended June 30,
| 2017 | 2016
Workers’ compensation | $ | (20 | ) | $ | (83 | )
Workers’ compensation discount accretion | 16 |  | 14 |
General liability | 10 |  | 66 |
Package business | — |  | 52 |
Commercial property | (6 | ) | (3 | )
Professional liability | — |  | (33 | )
Bond | (10 | ) | (6 | )
Automobile liability - Commercial Lines | 20 |  | 1 |
Automobile liability - Personal Lines | — |  | 140 |
Homeowners | — |  | (5 | )
Net asbestos reserves | — |  | 197 |
Net environmental reserves | — |  | 71 |
Catastrophes | (13 | ) | (5 | )
Uncollectible reinsurance | — |  | (30 | )
Other reserve re-estimates, net | 5 |  | 8 |
Total prior accident year development | $ | 2 |  | $ | 384 |
Property and Casualty Insurance Products Roll-forward of Liabilities for Unpaid Losses and Loss Adjustment Expenses
| For the six months ended June 30,
| 2017 | 2016
Beginning liabilities for unpaid losses and loss adjustment expenses, gross | $ | 21,833 |  | $ | 21,825 |
Reinsurance and other recoverables | 2,776 |  | 2,882 |
Beginning liabilities for unpaid losses and loss adjustment expenses, net | 19,057 |  | 18,943 |
Provision for unpaid losses and loss adjustment expenses |  |  |  |
Current accident year | 3,563 |  | 3,447 |
Prior accident year development | 2 |  | 384 |
Total provision for unpaid losses and loss adjustment expenses | 3,565 |  | 3,831 |
Less: payments |  |  |  |
Current accident year | 1,009 |  | 1,066 |
Prior accident years | 2,292 |  | 2,550 |
Total payments | 3,301 |  | 3,616 |
Ending liabilities for unpaid losses and loss adjustment expenses, net | 19,321 |  | 19,158 |
Reinsurance and other recoverables [1] | 2,809 |  | 2,746 |
Ending liabilities for unpaid losses and loss adjustment expenses, gross | $ | 22,130 |  | $ | 21,904 |
[1] | Includes reinsurance recoverables of $2,350 and $2,461 for the six months ended June 30, 2017 and 2016, respectively.
(Favorable) Unfavorable Prior Accident Year Development
| For the six months ended June 30,
| 2017 | 2016
Workers’ compensation | $ | (20 | ) | $ | (83 | )
Workers’ compensation discount accretion | 16 |  | 14 |
General liability | 10 |  | 66 |
Package business | — |  | 52 |
Commercial property | (6 | ) | (3 | )
Professional liability | — |  | (33 | )
Bond | (10 | ) | (6 | )
Automobile liability - Commercial Lines | 20 |  | 1 |
Automobile liability - Personal Lines | — |  | 140 |
Homeowners | — |  | (5 | )
Net asbestos reserves | — |  | 197 |
Net environmental reserves | — |  | 71 |
Catastrophes | (13 | ) | (5 | )
Uncollectible reinsurance | — |  | (30 | )
Other reserve re-estimates, net | 5 |  | 8 |
Total prior accident year development | $ | 2 |  | $ | 384 |
Re-estimates of prior accident year reserves for the six months ended June 30, 2017 Workers’ compensation reserves in Small Commercial were reduced given the continued emergence of favorable frequency for accident years 2013 to 2015. Management has placed additional weight on this favorable experience as it becomes more credible. General liability reserves were increased for the 2013 to 2016 accident years on a class of business that insures service and maintenance contractors. This increase was partially offset by a decrease in recent accident year reserves for other Middle Market general liability reserves. Bond business reserves related to recent accident years were reduced as reported losses for commercial and contract surety have emerged favorably. Automobile liability reserves within Commercial Lines were increased in Small Commercial and large national accounts for the 2013 to 2016 accident years, driven by higher frequency of more severe accidents, including litigated claims. Catastrophes reserves were reduced primarily due to lower estimates of 2016 wind and hail event losses and a decrease in losses on a 2015 wildfire. Re-estimates of prior accident year reserves for the six months ended June 30, 2016 Workers' compensation reserves decreased for accident years 2013 through 2015 due to favorable frequency and, to a lesser extent, lower medical severity trends. Loss costs for these accident years continued to emerge favorably and management has been placing additional weight on this favorable experience as it becomes more credible. General liability reserves increased for accident years 2012 through 2015 primarily due to higher severity losses incurred on a class of business that insures service and maintenance contractors. Small Commercial package business reserves increased due to higher than expected severity on liability claims, principally for accident years 2013 through 2015. Severity for these accident years has developed unfavorably and management has placed more weight on emerged experience. Professional liability reserves decreased for claims made years 2008 through 2013, primarily for large accounts, including on non-securities class action cases. Claim costs have emerged favorably as these years have matured and management has placed more weight on the emerged experience. Automobile liability reserves increased in personal lines primarily due to increased bodily injury frequency and severity for the 2015 accident year and increased bodily injury severity for the 2014 accident year. Increases in auto liability loss costs were across both the direct and agency distribution channels. Asbestos and environmental reserves increased during the period as a result of the 2016 comprehensive annual review. For a discussion of the Company's 2016 review of asbestos and environmental reserves, see Part II, Item 7 MD&A, Critical Accounting Estimates, Property & Casualty Other Operations section in the Company’s 2016 Form 10-K Annual Report. Uncollectible reinsurance reserves decreased as a result of giving greater weight to favorable collectability experience in recent calendar periods in estimating future collections. Group Life, Disability and Accident Products Roll-forward of Liabilities for Unpaid Losses and Loss Adjustment Expenses
| For the six months ended June 30,
| 2017 | 2016 [1]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross | $ | 5,772 |  | $ | 5,889 |
Reinsurance recoverables | 208 |  | 218 |
Beginning liabilities for unpaid losses and loss adjustment expenses, net | 5,564 |  | 5,671 |
Provision for unpaid losses and loss adjustment expenses |  |  |  |
Current incurral year | 1,319 |  | 1,287 |
Prior year's discount accretion | 101 |  | 105 |
Prior incurral year development [2] | (112 | ) | (98 | )
Total provision for unpaid losses and loss adjustment expenses [3] | 1,308 |  | 1,294 |
Less: payments |  |  |  |
Current incurral year | 542 |  | 523 |
Prior incurral years | 833 |  | 836 |
Total payments | 1,375 |  | 1,359 |
Ending liabilities for unpaid losses and loss adjustment expenses, net | 5,497 |  | 5,606 |
Reinsurance recoverables | 212 |  | 216 |
Ending liabilities for unpaid losses and loss adjustment expenses, gross | $ | 5,709 |  | $ | 5,822 |
[1] | Certain prior year amounts have been reclassified to conform to the current year presentation for unpaid losses and loss adjustment expenses.
[2] | Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis.
[3] | Includes unallocated loss adjustment expenses of $48, and $51 for for the six months ended June 30, 2017 and 2016, respectively, that are recorded in insurance operating costs and other expenses in the Condensed Consolidated Statements of Operations.
Re-estimates of prior incurral years reserves for the six months ended June 30, 2017 Group Disability- Prior period reserve estimates decreased by approximately $65 largely driven by group long-term disability claim recoveries higher than prior reserve assumptions. This favorability was partially reduced by lower expectation of future benefit offsets, particularly lower Social Security Disability Income approval rates and longer decision turnaround times in the Social Security Administration. Group Life and Accident (including Group Life Premium Waiver)- Prior period reserve estimates decreased by approximately $45 largely driven by lower than previously expected claim incidence in Group Life and Group Life Premium Waiver and lower than expected severity on Group Accidental Death & Dismemberment. Re-estimates of prior incurral years reserves for the six months ended June 30, 2016 Group Disability- Prior period reserve estimates decreased by approximately $65 largely driven by group long-term disability claim recoveries higher than prior reserve assumptions. This favorability was partially offset by lower Social Security Disability Income approvals driven by lower approval rates and ongoing backlogs in the Social Security Administration. Group Life and Accident (including Group Life Premium Waiver)- Prior period reserve estimates decreased by approximately $30 largely driven by lower than previously expected incidence on Group Life Premium Waiver. Group Life, Disability and Accident Products Roll-forward of Liabilities for Unpaid Losses and Loss Adjustment Expenses
| For the six months ended June 30,
| 2017 | 2016 [1]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross | $ | 5,772 |  | $ | 5,889 |
Reinsurance recoverables | 208 |  | 218 |
Beginning liabilities for unpaid losses and loss adjustment expenses, net | 5,564 |  | 5,671 |
Provision for unpaid losses and loss adjustment expenses |  |  |  |
Current incurral year | 1,319 |  | 1,287 |
Prior year's discount accretion | 101 |  | 105 |
Prior incurral year development [2] | (112 | ) | (98 | )
Total provision for unpaid losses and loss adjustment expenses [3] | 1,308 |  | 1,294 |
Less: payments |  |  |  |
Current incurral year | 542 |  | 523 |
Prior incurral years | 833 |  | 836 |
Total payments | 1,375 |  | 1,359 |
Ending liabilities for unpaid losses and loss adjustment expenses, net | 5,497 |  | 5,606 |
Reinsurance recoverables | 212 |  | 216 |
Ending liabilities for unpaid losses and loss adjustment expenses, gross | $ | 5,709 |  | $ | 5,822 |
[1] | Certain prior year amounts have been reclassified to conform to the current year presentation for unpaid losses and loss adjustment expenses.
[2] | Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis.
[3] | Includes unallocated loss adjustment expenses of $48, and $51 for for the six months ended June 30, 2017 and 2016, respectively, that are recorded in insurance operating costs and other expenses in the Condensed Consolidated Statements of Operations.

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- Definition Tabular disclosure of the activity in the reserve for settling insured claims and expenses incurred in the claims settlement process for the period. The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claim adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 + Details
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