XML 18 R16.htm IDEA: XBRL DOCUMENT
v3.20.1

Earnings Per Share (Notes) | 3 Months Ended
--- | ---
Mar. 31, 2020
Earnings Per Share [Abstract] |
Earnings per share | 10. Earnings per Share The following is a reconciliation of the shares used to compute basic and diluted earnings per share (in millions):
| Three Months Ended
| March 31,
| 2020 |  | 2019
Weighted average number of common shares outstanding used to compute basic earnings per share | 52.8 |  |  | 52.6 |
Dilutive effect of stock-based awards | 0.5 |  |  | 0.6 |
Number of shares used to compute diluted earnings per share | 53.3 |  |  | 53.2 |
There were 0.3 million share equivalents outstanding during the three months ended March 31, 2020 and 2019 that were anti-dilutive when applying the treasury stock method and thus were excluded from the number of shares used to compute diluted earnings per share.

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