Asset Acquisition (Details) - USD ($) $ in Millions		12 Months Ended
Jul. 28, 2017	Dec. 31, 2017
Asset Acquisition
Payments made to acquire IPR&D, including patents and other rights	$ 40.0
Research and development
Asset Acquisition
Payments made to acquire IPR&D, including patents and other rights		$ 40.0

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration