Off-Balance-Sheet Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Commitments and Letters of Credit

The following table shows the contractual amounts of commitments and letters of credit.

TABLE 123: COMMITMENTS AND LETTERS OF CREDIT

	DECEMBER 31,
(In Millions)	2017		2016
Legally Binding Commitments to Extend Credit(1)	$	26,822.6	$	32,768.1
Standby Letters of Credit(2)	2,970.0		3,846.1
Commercial Letters of Credit	37.7		24.0

(1)These amounts exclude $385.5 million and $377.2 million of commitments participated to others at December 31, 2017 and 2016, respectively.

(2)These amounts include $92.5 million and $134.2 million of standby letters of credit secured by cash deposits or participated to others as of December 31, 2017 and 2016, respectively. The weighted average maturity of standby letters of credit was 22 months at December 31, 2017 and 24 months at December 31, 2016.