Loans Loans - Schedule of Additional Information on Nonaccrual Loans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Receivables [Abstract]
Residential Mortgage Loan Nonaccrual Carried At Lower Of Amortized Cost Or Fair Value Less Cost To Sell	$ 827		$ 827		$ 841
Interest income that would have been recorded if the nonaccrual receivable had been current in accordance with contractual terms during the period	23	25	77	86
Interest income that was recorded on nonaccrual loans and included in interest income during the period	$ 6	$ 8	$ 20	$ 18