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v3.21.1

Segment Reporting (Schedule of Significant Components of the Company's Revenues and Expenses) (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Segment Reporting Information [Line Items] |  |
Gross premiums written | $ 2,652,442,000 | $ 2,025,721,000
Net premiums written | 1,824,083,000 | 1,269,808,000
Net premiums earned | 1,153,836,000 | 913,098,000
Net claims and claim expenses incurred | 867,051,000 | 570,954,000
Acquisition expenses | 267,234,000 | 210,604,000
Operational expenses | 55,311,000 | 67,461,000
Underwriting (loss) income | (35,760,000) | 64,079,000
Net investment income | 79,804,000 | 99,473,000
Net foreign exchange losses | (22,788,000) | (5,728,000)
Equity in (losses) earnings of other ventures | (5,558,000) | 4,564,000
Other income (loss) | 2,171,000 | (4,436,000)
Net realized and unrealized losses on investments | (345,563,000) | (110,707,000)
Corporate expenses | (10,405,000) | (15,991,000)
Interest expense | (11,912,000) | (14,927,000)
(Loss) income before taxes | (350,011,000) | 16,327,000
Income tax benefit | 19,516,000 | 8,846,000
Net loss (income) attributable to redeemable noncontrolling interests | 46,850,000 | (98,091,000)
Dividends on preference shares | (7,289,000) | (9,056,000)
Net (loss) income attributable to RenaissanceRe common shareholders | (290,934,000) | (81,974,000)
Net claims and claim expenses incurred – current accident year | 876,083,000 | 557,054,000
Net claims and claim expenses incurred – prior accident years | (9,032,000) | 13,900,000
Total net incurred | $ 867,051,000 | $ 570,954,000
Net claims and claim expense ratio – current accident year | 75.90% | 61.00%
Net claims and claim expense ratio – prior accident years | (0.80%) | 1.50%
Net claims and claim expense ratio – calendar year | 75.10% | 62.50%
Underwriting expense ratio | 28.00% | 30.50%
Combined ratio | 103.10% | 93.00%
Other |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | $ 0 | $ 0
Net premiums written | 0 | 0
Net premiums earned | 0 | 0
Net claims and claim expenses incurred | 0 | 0
Acquisition expenses | 0 | 0
Operational expenses | 0 | 0
Underwriting (loss) income | 0 | 0
Net investment income | 79,804,000 | 99,473,000
Net foreign exchange losses | (22,788,000) | (5,728,000)
Equity in (losses) earnings of other ventures | (5,558,000) | 4,564,000
Other income (loss) | 2,171,000 | (4,436,000)
Net realized and unrealized losses on investments | (345,563,000) | (110,707,000)
Corporate expenses | (10,405,000) | (15,991,000)
Interest expense | (11,912,000) | (14,927,000)
Income tax benefit | 19,516,000 | 8,846,000
Net loss (income) attributable to redeemable noncontrolling interests | 46,850,000 | (98,091,000)
Dividends on preference shares | (7,289,000) | (9,056,000)
Net claims and claim expenses incurred – current accident year | 0 | 0
Net claims and claim expenses incurred – prior accident years | 0 | 0
Total net incurred | 0 | 0
Property |  |
Segment Reporting Information [Line Items] |  |
Net claims and claim expenses incurred – prior accident years | (5,162,000) | 13,901,000
Property | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | 1,616,819,000 | 1,220,526,000
Net premiums written | 1,008,460,000 | 674,581,000
Net premiums earned | 605,166,000 | 421,335,000
Net claims and claim expenses incurred | 498,832,000 | 144,745,000
Acquisition expenses | 112,754,000 | 85,351,000
Operational expenses | 35,375,000 | 44,007,000
Underwriting (loss) income | (41,795,000) | 147,232,000
Net claims and claim expenses incurred – current accident year | 503,994,000 | 130,844,000
Net claims and claim expenses incurred – prior accident years | (5,162,000) | 13,901,000
Total net incurred | $ 498,832,000 | $ 144,745,000
Net claims and claim expense ratio – current accident year | 83.30% | 31.10%
Net claims and claim expense ratio – prior accident years | (0.90%) | 3.30%
Net claims and claim expense ratio – calendar year | 82.40% | 34.40%
Underwriting expense ratio | 24.50% | 30.70%
Combined ratio | 106.90% | 65.10%
Casualty and Specialty |  |
Segment Reporting Information [Line Items] |  |
Net claims and claim expenses incurred – prior accident years | $ (3,870,000) | $ (1,000.0)
Casualty and Specialty | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | 1,035,623,000 | 805,195,000
Net premiums written | 815,623,000 | 595,227,000
Net premiums earned | 548,670,000 | 491,763,000
Net claims and claim expenses incurred | 368,219,000 | 426,209,000
Acquisition expenses | 154,480,000 | 125,253,000
Operational expenses | 19,936,000 | 23,454,000
Underwriting (loss) income | 6,035,000 | (83,153,000)
Net claims and claim expenses incurred – current accident year | 372,089,000 | 426,210,000
Net claims and claim expenses incurred – prior accident years | (3,870,000) | (1,000)
Total net incurred | $ 368,219,000 | $ 426,209,000
Net claims and claim expense ratio – current accident year | 67.80% | 86.70%
Net claims and claim expense ratio – prior accident years | (0.70%) | 0.00%
Net claims and claim expense ratio – calendar year | 67.10% | 86.70%
Underwriting expense ratio | 31.80% | 30.20%
Combined ratio | 98.90% | 116.90%

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