Floating Rate Capital Debt (Tables)

12 Months Ended

Dec. 31, 2016

Brokers and Dealers [Abstract]

Summary of Book Values of Outstanding Subordinated Debentures

The following table summarizes the book values of the outstanding subordinated debentures as of December 31, 2016 and 2015.

TABLE 76: SUBORDINATED DEBENTURES

	DECEMBER 31,
(In Millions)	2016		2015
NTC Capital I Subordinated Debentures due January 15, 2027	$	154.1	$	154.1
NTC Capital II Subordinated Debentures due April 15, 2027	123.3		123.2
Total Subordinated Debentures	$	277.4	$	277.3