Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Statutory Basis [Abstract]
Number Of Preceeding Months To Accumulate Dividend Paid For Approval	12 months
Future Dividend Payment Restricted To Such Percent Of Surplus To Policy Holders	10.00%
RGA Reinsurance Max Dividend Payments Without Approval	$ 653.9