XML 56 R34.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Common Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Equity [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | Basic and diluted earnings per share for the Company were calculated as follows:
(In millions except per share data) | 2016 | 2015 | 2014
Net income | $ | 338.2 |  | $ | 271.3 |  | $ | 395.8 |
Average Common Shares Outstanding |  |  |
Basic average common shares outstanding | 199.7 |  | 199.6 |  | 199.2 |
Effect of dilutive securities: |  |  |
Contingently issuable shares (performance and restricted stock units) | 0.2 |  | — |  | 0.7 |
Diluted average common shares outstanding | 199.9 |  | 199.6 |  | 199.9 |
Basic Earnings Per Average Common Share | $ | 1.69 |  | $ | 1.36 |  | $ | 1.99 |
Diluted Earnings Per Average Common Share | $ | 1.69 |  | $ | 1.36 |  | $ | 1.98 |
Anti-dilutive shares excluded from earnings per share calculation | — |  | — |  | — |

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
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://www.xbrl.org/2003/role/presentationRef -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