Acquisition of Tokio Millennium RE	12 Months Ended
Dec. 31, 2018
Business Combinations [Abstract]
Acquisition of Tokio Millennium RE	ACQUISITION OF TOKIO MILLENNIUM RE Pursuant to the TMR Stock Purchase Agreement, the aggregate consideration for the TMR Stock Purchase consists of: (i) an amount in cash equal to the product of (x) the closing tangible book value of the TMR Group Entities (calculated as set forth in the TMR Stock Purchase Agreement) prior to taking into account the pre-closing dividend (if any) (as described in the paragraph below) and the amounts payable to Tokio at the closing under the Reserve Development Agreement and Third Party Capital Agreement (as defined in the TMR Stock Purchase Agreement) (the “ADC/TPC Amount”) and (y) 1.02, less an amount equal to the sum of (1) the amount of the pre-closing dividend (if any), and (2) the ADC/TPC Amount, plus solely in the event the 30 trading day volume-weighted average closing RenaissanceRe share price (the “Closing RenaissanceRe Share Price”) is less than or equal to $128.37 (the “Signing RenaissanceRe Share Price”), the amount by which (A) $250.0 million exceeds (B) the product of (I) the RenaissanceRe Share Amount (as defined below) and (II) the Closing RenaissanceRe Share Price; and (ii) a number of common shares of the Company equal to (a) if the Closing RenaissanceRe Share Price is less than or equal to the Signing RenaissanceRe Share Price, an amount equal to the quotient obtained by dividing (1) $250.0 million by (2) the Signing RenaissanceRe Share Price, or (b) if the Signing RenaissanceRe Share Price is less than the Closing RenaissanceRe Share Price, an amount equal to the quotient obtained by dividing (1) $250.0 million by (2) the Closing RenaissanceRe Share Price, in either case of clause (a) or (b), rounded down to the nearest whole number (the “RenaissanceRe Share Amount”). Under the terms of the TMR Stock Purchase Agreement, Tokio will use its reasonable best efforts to cause TMR AG and/or TMR UK to, subject to regulatory approvals, pay to Tokio, prior to closing, one or more dividends in an aggregate amount equal to $275.0 million (or a lesser amount as mutually agreed by the Company and Tokio), provided that Tokio shall use its reasonable best efforts to maximize the amount of such dividend in an amount up to $500.0 million (or a lesser amount as mutually agreed by the Company and Tokio). In connection with the TMR Stock Purchase Agreement, Tokio, TMR AG and TMR UK have agreed to enter into a Reserve Development Agreement at the closing whereby TMR AG and TMR UK will agree to cede to Tokio, and Tokio will agree to indemnify and reimburse TMR AG and TMR UK for, substantially all of TMR AG and TMR UK’s adverse development on stated reserves at time of Closing including unearned premium reserves, subject to the terms and conditions of the Reserve Development Agreement. The TMR Stock Purchase is expected to close in the first half of 2019, subject to the closing conditions described above and contained in the TMR Stock Purchase Agreement.

ACQUISITION OF TOKIO MILLENNIUM RE

Pursuant to the TMR Stock Purchase Agreement, the aggregate consideration for the TMR Stock Purchase consists of: (i) an amount in cash equal to the product of (x) the closing tangible book value of the TMR Group Entities (calculated as set forth in the TMR Stock Purchase Agreement) prior to taking into account the pre-closing dividend (if any) (as described in the paragraph below) and the amounts payable to Tokio at the closing under the Reserve Development Agreement and Third Party Capital Agreement (as defined in the TMR Stock Purchase Agreement) (the “ADC/TPC Amount”) and (y) 1.02, less an amount equal to the sum of (1) the amount of the pre-closing dividend (if any), and (2) the ADC/TPC Amount, plus solely in the event the 30 trading day volume-weighted average closing RenaissanceRe share price (the “Closing RenaissanceRe Share Price”) is less than or equal to $128.37 (the “Signing RenaissanceRe Share Price”), the amount by which (A) $250.0 million exceeds (B) the product of (I) the RenaissanceRe Share Amount (as defined below) and (II) the Closing RenaissanceRe Share Price; and (ii) a number of common shares of the Company equal to (a) if the Closing RenaissanceRe Share Price is less than or equal to the Signing RenaissanceRe Share Price, an amount equal to the quotient obtained by dividing (1) $250.0 million by (2) the Signing RenaissanceRe Share Price, or (b) if the Signing RenaissanceRe Share Price is less than the Closing RenaissanceRe Share Price, an amount equal to the quotient obtained by dividing (1) $250.0 million by (2) the Closing RenaissanceRe Share Price, in either case of clause (a) or (b), rounded down to the nearest whole number (the “RenaissanceRe Share Amount”).

Under the terms of the TMR Stock Purchase Agreement, Tokio will use its reasonable best efforts to cause TMR AG and/or TMR UK to, subject to regulatory approvals, pay to Tokio, prior to closing, one or more dividends in an aggregate amount equal to $275.0 million (or a lesser amount as mutually agreed by the Company and Tokio), provided that Tokio shall use its reasonable best efforts to maximize the amount of such dividend in an amount up to $500.0 million (or a lesser amount as mutually agreed by the Company and Tokio).

In connection with the TMR Stock Purchase Agreement, Tokio, TMR AG and TMR UK have agreed to enter into a Reserve Development Agreement at the closing whereby TMR AG and TMR UK will agree to cede to Tokio, and Tokio will agree to indemnify and reimburse TMR AG and TMR UK for, substantially all of TMR AG and TMR UK’s adverse development on stated reserves at time of Closing including unearned premium reserves, subject to the terms and conditions of the Reserve Development Agreement.

The TMR Stock Purchase is expected to close in the first half of 2019, subject to the closing conditions described above and contained in the TMR Stock Purchase Agreement.