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Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations
12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract]  
Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations
SCHEDULE VI. SUPPLEMENTAL INFORMATION CONCERNING PROPERTY AND CASUALTY INSURANCE OPERATIONS
As of and for the years ended December 31Consolidated Property and Casualty Operations
(In millions)202020192018
Balance Sheet Data
Deferred acquisition costs$708 $662 
Reserves for unpaid claim and claim adjustment expenses22,706 21,720 
Discount deducted from claim and claim adjustment expense reserves above (based on interest rates ranging from 3.5% to 6.5%)
1,209 1,321 
Unearned premiums5,119 4,583 
Statement of Operations Data
Net written premiums$8,059 $7,656 $7,345 
Net earned premiums7,649 7,428 7,312 
Net investment income1,896 2,063 1,751 
Incurred claim and claim adjustment expenses related to current year5,793 5,356 5,358 
Incurred claim and claim adjustment expenses related to prior years(119)(127)(179)
Amortization of deferred acquisition costs1,410 1,383 1,335 
Paid claim and claim adjustment expenses5,164 5,576 5,331