Floating Rate Capital Debt (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018 and 2017.

TABLE 77: SUBORDINATED DEBENTURES

	DECEMBER 31,
(In Millions)	2018		2017
NTC Capital I Subordinated Debentures due January 15, 2027	$	154.2	$	154.2
NTC Capital II Subordinated Debentures due April 15, 2027	123.4		123.3
Total Subordinated Debentures	$	277.6	$	277.5