XML 47 R33.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Goodwill and Intangible Assets (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill by reportable segment were as follows:
($ in millions) | Proprietary Products |  | Contract-Manufactured Products |  | Total
Balance, December 31, 2015 | $ | 75.1 |  |  | $ | 29.5 |  |  | $ | 104.6 |
Foreign currency translation | (1.4 | ) |  | (0.2 | ) |  | (1.6 | )
Balance, December 31, 2016 | 73.7 |  |  | 29.3 |  |  | 103.0 |
Foreign currency translation | 3.9 |  |  | 0.8 |  |  | 4.7 |
Balance, December 31, 2017 | $ | 77.6 |  |  | $ | 30.1 |  |  | $ | 107.7 |
Schedule of Intangible Assets by Major Class | Intangible assets and accumulated amortization as of December 31 were as follows:
| 2017 |  | 2016
($ in millions) | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Patents and licensing | $ | 18.2 |  |  | $ | (14.1 | ) |  | $ | 4.1 |  |  | $ | 17.8 |  |  | $ | (13.4 | ) |  | $ | 4.4 |
Technology | 3.3 |  |  | (1.0 | ) |  | 2.3 |  |  | 3.3 |  |  | (0.7 | ) |  | 2.6 |
Trademarks | 2.0 |  |  | (1.7 | ) |  | 0.3 |  |  | 2.0 |  |  | (1.6 | ) |  | 0.4 |
Customer relationships | 29.3 |  |  | (19.1 | ) |  | 10.2 |  |  | 29.3 |  |  | (18.3 | ) |  | 11.0 |
Customer contracts | 11.1 |  |  | (6.3 | ) |  | 4.8 |  |  | 10.7 |  |  | (5.8 | ) |  | 4.9 |
| $ | 63.9 |  |  | $ | (42.2 | ) |  | $ | 21.7 |  |  | $ | 63.1 |  |  | $ | (39.8 | ) |  | $ | 23.3 |

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Intangible Assets by Major Class [Table Text Block] + References No definition available. + Details
Name: | wst_ScheduleOfIntangibleAssetsByMajorClassTableTextBlock
Namespace Prefix: | wst_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration