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Liability for Unpaid Claims (Tables)
12 Months Ended
Dec. 31, 2012
Insurance [Abstract]  
Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]
Changes in the liability for unpaid claims and claim adjustment expenses are as follows:
 
2012
 
2011
 
2010
 
(in millions of dollars)
Balance at January 1
$
24,586.5

 
$
24,339.4

 
$
24,585.7

   Less Reinsurance Recoverable
2,042.6

 
2,028.2

 
2,179.3

Net Balance at January 1
22,543.9

 
22,311.2

 
22,406.4

 
 
 
 
 
 
Incurred Related to
 
 
 
 
 
   Current Year
4,946.2

 
4,684.4

 
4,517.9

   Prior Years
 
 
 
 
 
      Interest
1,247.6

 
1,262.9

 
1,268.9

      All Other Incurred
(175.7
)
 
209.1

 
(61.3
)
      Foreign Currency
101.1

 
(10.9
)
 
(73.9
)
Total Incurred
6,119.2

 
6,145.5

 
5,651.6

 
 
 
 
 
 
Paid Related to
 
 
 
 
 
   Current Year
(1,715.4
)
 
(1,588.6
)
 
(1,514.8
)
   Prior Years
(4,386.6
)
 
(4,324.2
)
 
(4,232.0
)
Total Paid
(6,102.0
)
 
(5,912.8
)
 
(5,746.8
)
 
 
 
 
 
 
Net Balance at December 31
22,561.1

 
22,543.9

 
22,311.2

   Plus Reinsurance Recoverable
2,006.0

 
2,042.6

 
2,028.2

Balance at December 31
$
24,567.1

 
$
24,586.5

 
$
24,339.4

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]
A reconciliation of policy and contract benefits and reserves for future policy and contract benefits as reported in our consolidated balance sheets to the liability for unpaid claims and claim adjustment expenses is as follows:
 
December 31
 
2012
 
2011
 
2010
 
(in millions of dollars)
Policy and Contract Benefits
$
1,484.6

 
$
1,494.0

 
$
1,565.0

Reserves for Future Policy and Contract Benefits
44,694.4

 
43,051.9

 
39,715.0

Total
46,179.0

 
44,545.9

 
41,280.0

Less:
 
 
 
 
 
   Life Reserves for Future Policy and Contract Benefits
7,571.1

 
7,454.2

 
7,380.7

   Accident and Health Active Life Reserves
7,763.3

 
7,259.6

 
6,451.6

   Unrealized Adjustment to Reserves for Future Policy and Contract Benefits
6,277.5

 
5,245.6

 
3,108.3

Liability for Unpaid Claims and Claim Adjustment Expenses
$
24,567.1

 
$
24,586.5

 
$
24,339.4