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

3 Months Ended

Mar. 31, 2019

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

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

	Three Months Ended
	March 31,
(Millions)	2019	2018
Common shares:
Shares issued and outstanding, beginning of period	115,151,251	120,000,000
Issuance of shares to directors and employees	111,052	—
Shares issued and outstanding, end of period	115,262,303	120,000,000

Schedule of change in non-controlling interest

(Millions)	Total
Non-controlling interests as of December 31, 2018	$	1.7
Net income attributable to non-controlling interests		0.4
Other, net		0.1
Non-controlling interests as of March 31, 2019	$	2.2

(Millions)	Total
Non-controlling interests as of December 31, 2017	$	0.2
Net income attributable to non-controlling interests		0.2
Other, net		0.1
Non-controlling interests as of March 31, 2018	$	0.5