Consolidated Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities
Net income	$ 733,305	$ 711,739
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	155,000	196,000
Depreciation and amortization of premises and equipment	63,344	60,220
Amortization of capitalized servicing rights	44,678	39,895
Amortization of core deposit and other intangible assets	46,766	44,455
Provision for deferred income taxes	108,699	14,530
Asset write-downs	46,505	64,153
Net gain on sales of assets	(5,070)	(183,861)
Net change in accrued interest receivable, payable	(10,712)	(6,206)
Net change in other accrued income and expense	(204,876)	(21,427)
Net change in loans originated for sale	(528,606)	316,623
Net change in trading account assets and liabilities	24,743	49,376
Net cash provided by operating activities	473,776	1,285,497
Cash flows from investing activities
Proceeds from sales of investment securities, Available for sale	49,430	1,909,427
Proceeds from sales of investment securities, Other	61,648	106,925
Proceeds from maturities of investment securities, Available for sale	1,155,603	1,007,612
Proceeds from maturities of investment securities, Held to maturity	237,933	180,475
Purchases of investment securities Available for sale	(26,115)	(2,569,168)
Purchases of investment securities, Held to maturity	(282,704)	(19,386)
Purchases of investment securities, Other	(13,563)	(30,438)
Net increase in loans and leases	(3,572,339)	(522,571)
Net (increase) decrease in interest-bearing deposits at banks	(257,034)	480,708
Net decrease in agreements to resell securities		15,000
Other investments, net	(7,447)	(9,856)
Capital expenditures, net	(65,947)	(38,030)
Acquisitions, net of cash acquired Banks and bank holding companies		178,940
Purchase of Wilmington Trust Corporation preferred stock		(330,000)
Proceeds from sales of real estate acquired in settlement of loans	80,762	181,310
Other, net	(86,649)	73,739
Net cash (used) provided by investing activities	(2,726,422)	614,687
Cash flows from financing activities
Net increase in deposits	4,624,134	825,434
Net decrease in short-term borrowings	(189,906)	(400,752)
Payments on long-term borrowings	(1,727,313)	(1,750,195)
Proceeds from issuance of preferred stock		495,000
Redemption of preferred stock		(370,000)
Dividends paid - common	(267,481)	(261,589)
Dividends paid - preferred	(31,494)	(24,815)
Other, net	15,237	7,035
Net cash provided (used) by financing activities	2,423,177	(1,479,882)
Net increase in cash and cash equivalents	170,531	420,302
Cash and cash equivalents at beginning of period	1,452,397	933,755
Cash and cash equivalents at end of period	1,622,928	1,354,057
Supplemental disclosure of cash flow information
Interest received during the period	2,187,027	2,087,083
Interest paid during the period	280,983	320,758
Income taxes paid during the period	272,502	308,057
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	36,881	51,046
Acquisitions: Fair value of:
Assets acquired (noncash)		10,666,102
Liabilities assumed		10,044,555
Common stock issued		405,557
Retirement of Wilmington Trust Corporation preferred stock		$ 330,000