Consolidated Statements of Condition - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 484.2	$ 665.7
Short-term investments	316.8	266.3
Total cash and cash equivalents (note 3)	801.0	932.0
Securities (note 4):
Trading debt securities, at fair value	7.1	8.4
Equity securities, at fair value	8.2	8.1
Debt securities available-for-sale, at fair value	3,564.3	3,121.0
Debt securities held-to-maturity, at amortized cost (fair value of $4.02 billion and $3.78 billion)	3,869.2	3,792.3
Federal Home Loan Bank and Federal Reserve Bank stock, at cost	341.1	303.4
Total securities	7,789.9	7,233.2
Loans held-for-sale (note 5)	511.3	19.5
Loans (notes 5 and 6):
Financing Receivable	43,596.1	35,241.4
Less allowance for loan losses	(246.6)	(240.4)
Total loans, net	43,349.5	35,001.0
Goodwill (notes 2 and 7)	3,065.5	2,685.7
Bank-owned life insurance	705.0	467.0
Premises and equipment, net (note 8)	305.5	267.3
Other acquisition-related intangible assets (notes 2 and 7)	209.1	180.0
Other assets (notes 6, 9 and 22)	1,853.0	1,091.6
Total assets	58,589.8	47,877.3
Deposits (note 10):
Non-interest-bearing	9,803.7	8,543.0
Savings	4,987.7	4,116.5
Interest-bearing checking and money market	19,592.6	16,583.3
Time	9,205.5	6,916.2
Total deposits	43,589.5	36,159.0
Borrowings (note 11):
Federal Home Loan Bank advances	3,125.4	2,404.5
Federal funds purchased	1,620.0	845.0
Customer repurchase agreements	409.1	332.9
Other borrowings	0.0	11.0
Total borrowings	5,154.5	3,593.4
Notes and debentures (note 12)	993.1	895.8
Other liabilities (notes 6, 9 and 22)	905.5	695.2
Total liabilities	50,642.6	41,343.4
Commitments and contingencies (notes 6, 21 and 22)
Stockholders’ Equity (notes 2, 14, 17, 18 and 19)
Preferred stock ($0.01 par value; 50.0 million shares authorized; 10.0 million shares issued and outstanding at both dates)	244.1	244.1
Common stock ($0.01 par value; 1.95 billion shares authorized; 532.8 million shares and 466.3 million shares issued)	5.3	4.7
Additional paid-in capital	7,639.4	6,549.3
Retained earnings	1,512.8	1,284.8
Unallocated common stock of Employee Stock Ownership Plan, at cost (5.9 million shares and 6.3 million shares)	(122.9)	(130.1)
Accumulated other comprehensive loss	(166.9)	(256.8)
Treasury stock, at cost (89.2 million shares and 89.0 million shares)	(1,164.6)	(1,162.1)
Total stockholders’ equity	7,947.2	6,533.9
Total liabilities and stockholders’ equity	58,589.8	47,877.3
Commercial [Member]
Loans (notes 5 and 6):
Financing Receivable	30,714.3	25,077.7
Less allowance for loan losses	(217.9)	(209.5)
Retail Loans [Member]
Loans (notes 5 and 6):
Financing Receivable	12,881.8	10,163.7
Less allowance for loan losses	(28.7)	(30.9)
Commercial Real Estate Loan [Member] | Commercial [Member]
Loans (notes 5 and 6):
Financing Receivable	14,762.3	11,649.6
Commercial and Industrial [Member]
Securities (note 4):
Loans held-for-sale (note 5)	157.9
Commercial and Industrial [Member] | Commercial [Member]
Loans (notes 5 and 6):
Financing Receivable	11,041.6	9,088.9
Equipment Financing [Member] | Commercial [Member]
Loans (notes 5 and 6):
Financing Receivable	4,910.4	4,339.2
Residential Mortgage Loan [Member] | Retail Loans [Member]
Loans (notes 5 and 6):
Financing Receivable	10,318.1	8,154.2
Home Equity and Other Consumer [Member] | Retail Loans [Member]
Loans (notes 5 and 6):
Financing Receivable	$ 2,563.7	$ 2,009.5