Earnings or loss per share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per share

The following table presents the reconciliation of basic and diluted earnings per share for the three months ended March 31, 2021:

(in millions, except per share data)	Three months ended March 31, 2021
	Earnings /(loss) (numerator)		Weighted average shares outstanding (denominator)	Earnings / (loss) per share
Basic	$	147.9	581.1	$	0.25
Dilutive effect of stock-based awards	—		8.0
Diluted	$	147.9	589.1	$	0.25

The following table presents the reconciliation of basic and diluted earnings per share for the three months ended March 31, 2020:

(in millions, except per share data)	Three months ended March 31, 2020
	Earnings /(loss) (numerator)		Weighted average shares outstanding (denominator)	Earnings / (loss) per share
Basic	$	30.9	573.7	$	0.05
Dilutive effect of stock-based awards	—		7.6
Diluted	$	30.9	581.3	$	0.05