Loans and Leases (Loans that Continue to Accrue Interest Under Terms of Restructuring) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Commercial and industrial	$ 36,938		$ 36,415
Commercial real estate-other	10,457		10,689
Commercial real estate-residential ADC	1,590	[1]	2,061	[1]
Direct retail lending	15,155		14,467
Sales finance	7,794		7,401
Revolving credit	2,206		2,212
Residential mortgage	23,117		20,581
Other lending subsidiaries	9,835		8,737
Total performing restructurings	1,052	[2],[3]	1,109	[2],[3]
Nonperforming restructurings	219	[4]	280	[4]
Total restructurings	1,271	[2],[3],[4],[5]	1,389	[2],[3],[4],[5]
Restructured mortgage loans held for sale that are government guaranteed	2		4
Restructured mortgage loans held for investment that are government guaranteed	264		232
Allowance for loan and lease losses attributable to restructured loans	220		266
Performing Restructurings [Member]
Commercial and industrial	62		74
Commercial real estate-other	78		117
Commercial real estate-residential ADC	28		44
Direct retail lending	114		146
Sales finance	7		8
Revolving credit	58		62
Residential mortgage	636	[2],[3]	608	[2],[3]
Other lending subsidiaries	69		50
Total performing restructurings	$ 1,052	[2],[3]	$ 1,109	[2],[3]

[1] Commercial real estate - residential ADC represents residential acquisition, development and construction loans.

[2] Excludes restructured mortgage loans held for investment that are government guaranteed totaling $264 million and $232 million at June 30, 2012 and December 31, 2011, respectively.

[3] Excludes restructured mortgage loans held for sale that are government guaranteed totaling $2 million and $4 million at June 30, 2012 and December 31, 2011, respectively.

[4] Nonperforming restructurings are included in nonaccrual loan disclosures.

[5] All restructurings are considered impaired. The allowance for loan and lease losses attributable to these restructured loans totaled $220 million and $266 million at June 30, 2012 and December 31, 2011, respectively.