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Fair Value Disclosures (Narrative Details)	Mar. 31, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Percentage Of Fixed Maturity Securities Classified As Level 3	10.40%	10.00%

X

- Definition

Percentage of fixed maturity securities classified as Level 3

+ References

No definition available.

+ Details

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Namespace Prefix:	rga_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration