XML 40 R25.htm IDEA: XBRL DOCUMENT
v3.19.1

Earnings Per Share (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2019
Earnings Per Share [Abstract] |
Computation of basic and diluted net income per common share | The following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):
| Three Months Ended March 31
| 2019 |  | 2018
Numerator: |  |  |
Net income | $ | 41.5 |  |  | $ | 76.3 |
Denominator: |  |  |
Weighted-average shares outstanding - basic | 36.5 |  |  | 37.9 |
Effect of dilutive securities: |  |  |
Equity compensation plans | 0.6 |  |  | 0.6 |
Weighted-average shares outstanding - diluted | 37.1 |  |  | 38.5 |
Basic earnings per share | $ | 1.14 |  |  | $ | 2.02 |
Diluted earnings per share | $ | 1.12 |  |  | $ | 1.98 |

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 Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration