Acquisitions Purchase Price Allocation (Tables)

9 Months Ended

Jun. 30, 2019

Purchase Price Allocation [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

(in millions)	Fair Value
Cash and cash equivalents	$	1.1
Deposits with and receivables from broker-dealers, clearing organizations, and counterparties (1)	7.7
Financial instruments owned, at fair value (2)	7.1
Deferred income taxes	2.7
Property and equipment	0.7
Other assets	0.7
Total fair value of assets acquired	20.0
Accounts payable and other accrued liabilities	1.9
Payable to broker-dealers, clearing organizations, and counterparties	0.1
Financial instruments sold, not yet purchased, at fair value (2)	4.4
Total fair value of liabilities assumed	6.4
Fair value of net assets acquired	13.6
Purchase price	8.2
Bargain purchase gain	$	5.4