Claims, Lawsuits And Other Contingencies (Details) (GBP £) In Millions, unless otherwise specified	Mar. 31, 2014 lawsuit
Governmental Inquiries and Related Claims [Member]
Loss Contingencies [Line Items]
Number of actions instituted by policyholders	2
Other Contingencies-Guarantees [Member]
Loss Contingencies [Line Items]
Amount reinsured by third party	£ 40