XML 22 R11.htm IDEA: XBRL DOCUMENT
v3.20.2

Earnings Per Share | 6 Months Ended
--- | ---
Jun. 30, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Our basic earnings per share calculations are based on the weighted average number of common shares outstanding during the period. Potentially dilutive securities include outstanding stock options, restricted share units, deferred stock units and performance-based restricted share units. The effect of potentially dilutive securities is reflected in diluted earnings per common share by application of the treasury method. Diluted earnings per share gives effect to all potentially dilutive common shares outstanding during the period.
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
(in millions, except per share data) | 2020 |  | 2019 |  | 2020 |  | 2019
Net income attributable to common shareholders | $ | 14.8 |  |  | $ | 91.0 |  |  | $ | 77.6 |  |  | $ | 173.4 |
Average basic shares outstanding | 58.0 |  |  | 59.9 |  |  | 58.5 |  |  | 59.8 |
Effect of dilutive share-based awards | 0.5 |  |  | 0.9 |  |  | 0.6 |  |  | 1.0 |
Average diluted shares outstanding | 58.5 |  |  | 60.8 |  |  | 59.1 |  |  | 60.8 |
Earnings per basic share | $ | 0.26 |  |  | $ | 1.52 |  |  | $ | 1.33 |  |  | $ | 2.90 |
Earnings per diluted share | $ | 0.25 |  |  | $ | 1.50 |  |  | $ | 1.31 |  |  | $ | 2.85 |
The computation of diluted earnings per share excludes the effect of the potential exercise of stock options when the average market price of the common stock is lower than the exercise price of the related stock options. For the three-month periods ended June 30, 2020 and 2019, the number of stock options excluded from the computation was 2.2 million and 1.3 million, respectively. For the six-month periods ended June 30, 2020 and 2019, the number of stock options excluded from the computation was 1.8 million and 1.2 million, respectively.

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
Name: | us-gaap_EarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration