Guarantees (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Guarantees [Abstract]
Related liability	$ 1,000,000	$ 1,000,000
Guarantees, maximum potential amount of future payments	52,000,000	55,000,000
SPC's assets in Consolidated Statements of Financial Position	1,180,000,000	1,010,000,000
SPC's liabilities in Consolidated Statements of Financial Position	$ 1,180,000,000	$ 1,010,000,000