XML 104 R32.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Earnings Per Share (Tables) | 3 Months Ended
--- | ---
Dec. 31, 2019
Earnings Per Share |
Reconciliation of the denominators for basic and diluted EPS | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​
​ | ​ | December 31, | ​ | December 31, |
​ |  | 2019 |  | 2018 |
​ | ​ | (in millions)
Denominator for basic earnings per share |  | 157.3 |  | 156.4 |
Potential common shares |  | 3.4 |  | 3.2 |
Denominator for diluted earnings per share |  | 160.7 |  | 159.6 |

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 the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration