Related Party Agreements and Transactions - Allocation of Services (Details) - Lilly - Transitional Services Agreement $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Related Party Transaction [Line Items]
Allocation of services	$ 105.2
Cost of sales
Related Party Transaction [Line Items]
Allocation of services	21.8
Research and development
Related Party Transaction [Line Items]
Allocation of services	2.2
Marketing, selling and administrative
Related Party Transaction [Line Items]
Allocation of services	$ 81.2

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration