XML 58 R36.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Earnings Per Share (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted earnings per share:
| Year ended December 31,
Share amounts in millions | 2019 |  | 2018 |  | 2017
Denominator for basic earnings per share: |  |  |  |  |
Weighted average common shares outstanding | 123 |  |  | 143 |  |  | 144 |
Effect of dilutive securities: |  |  |  |  |
Dilutive effect of employee stock plans | — |  |  | 1 |  |  | 2 |
Dilutive potential common shares | 123 |  |  | 144 |  |  | 146 |
Denominator for diluted earnings per share: |  |  |  |  |
Adjusted weighted average shares | 123 |  |  | 144 |  |  | 146 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EarningsPerShareBasicLineItems
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