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Stock Transactions Stock Transactions (Tables) | 9 Months Ended
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Sep. 30, 2015
Equity [Abstract] |
Class of Treasury Stock [Table Text Block] | The following table provides quarterly information relating to share repurchases made by RGA during 2015, by quarter (dollars in thousands, except share data):
Period of Repurchase |  | Shares |  | Amount |  | Cost per Share
First quarter |  | 2,538,718 |  |  | $ | 230,124 |  |  | $ | 90.65 |
Second quarter |  | 252,642 |  |  | 23,480 |  |  | 92.94 |
Third quarter |  | 782,437 |  |  | 70,702 |  |  | 90.36 |
Total |  | 3,573,797 |  |  | $ | 324,306 |  |  | $ | 90.75 |

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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