Common shareholder's equity, mezzanine equity, and non-controlling interests (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Schedule of changes in the company's issued and outstanding common shares

The following table presents changes in the Company's issued and outstanding Common shares as of March 31, 2020 and 2019, respectively:

	Three months ended March 31,
(Millions)	2020	2019
Common shares:
Shares issued and outstanding, beginning of period	115,299,341	115,151,251
Issuance of shares to directors and employees	—	111,052
Shares issued and outstanding, end of period	115,299,341	115,262,303

Schedule of change in non-controlling interest

The following tables show the change in non-controlling interest for the three months ended March 31, 2020 and 2019:

(Millions)	For the three months ended March 31, 2020		For the three months ended March 31, 2019
Non-controlling interests, beginning of the period	$	2.4	$	1.7
Net income attributable to non-controlling interests	0.2		0.4
Other, net	—		0.1
Non-controlling interests, end of the period	$	2.6	$	2.2