XML 85 R38.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Common Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Equity [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table calculates basic and diluted earnings per share for the Company.
(In millions except per share data) | 2019 | 2018 | 2017
Net income | $ | 433.6 |  | $ | 425.5 |  | $ | 619.0 |
Average common shares outstanding: |  |  |
Basic average common shares outstanding | 200.1 |  | 199.7 |  | 199.7 |
Effect of dilutive securities: |  |  |
Contingently issuable shares (performance and restricted stock units) | 0.6 |  | 0.8 |  | 0.3 |
Diluted average common shares outstanding | 200.7 |  | 200.5 |  | 200.0 |
Basic earnings per average common share | $ | 2.17 |  | $ | 2.13 |  | $ | 3.10 |
Diluted earnings per average common share | $ | 2.16 |  | $ | 2.12 |  | $ | 3.10 |
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://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