Earnings Per Share And Shareholder's Equity (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of earnings per share

A reconciliation of the numerators and denominators used in our basic and diluted earnings per share ("EPS") calculation is as follows (in millions): 

	Year Ended
	December 31, 2020		December 31, 2019		December 31, 2018
Numerator:
Net income (loss)	$	(162.6)	$	146.1	$	131.0
Denominator:
Weighted average shares outstanding for basic EPS	136.1		136.0		137.8
Dilutive effect of share-based awards*	—		0.5		0.5
Weighted average shares outstanding for diluted EPS	136.1		136.5		138.3
Anti-dilutive share-based awards excluded from computation of diluted EPS*	—		1.5		1.4

* In the period of a net loss, diluted shares equal basic shares.

Schedule of dividends payable

We paid dividends as follows:

	Year Ended
	December 31, 2020		December 31, 2019		December 31, 2018
Dividends paid (in millions)	$	123.9	$	112.4	$	104.9
Dividends paid (per share)	$	0.90	$	0.82	$	0.76