LOANS AND LEASES (Narrative) (Details) (USD $)	9 Months Ended			9 Months Ended					9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Retail branches	Sep. 30, 2014 Residential Mortgages	Dec. 31, 2013 Residential Mortgages	Sep. 30, 2014 Residential Mortgages	Dec. 31, 2013 Residential Mortgages	Sep. 30, 2014 Residential, including originated home equity products	Sep. 30, 2014 Consumer Loans Auto Financing Receivable	Sep. 30, 2014 Consumer Student Loans Receivable	Sep. 30, 2014 Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale		$ 205,000,000	$ 176,000,000				$ 205,000,000	$ 176,000,000
Other loans held for sale		3,000,000	1,078,000,000
Loans pledged as collateral for FHLB borrowed funds					19,500,000,000	19,000,000,000
Loans pledged as collateral to support the contingent ability to borrow at the FRB discount window					13,400,000,000	13,900,000,000
Loans purchased during period									1,500,000,000	1,300,000,000	59,000,000
Loans sold during period	$ 0			$ 1,000,000,000					$ 126,000,000		$ 357,000,000	$ 165,000,000