XML 47 R29.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Earnings Per Share (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of Weighted Average Shares Outstanding Used to Compute Earnings Per Common Share | The weighted average number of shares outstanding used to compute earnings per common share were as follows (in millions):
|  | 2017 |  |  | 2016 |  |  | 2015 |
Weighted average common shares outstanding for basic computations |  | 287.8 |  |  | 299.3 |  |  | 310.3 |
Weighted average dilutive effect of equity awards |  | 2.8 |  |  | 3.8 |  |  | 4.4 |
Weighted average common shares outstanding for diluted computations |  | 290.6 |  |  | 303.1 |  |  | 314.7 |

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://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_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration