Collaborations and Other Arrangements (Milestones (Deferred) Capitalized) (Details) - Milestone Payments, Development and Regulatory, Capitalized (Deferred), Cumulative $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Trajenta®
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative arrangement, rights and obligations, terms	$ 446.4
Jardiance
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative arrangement, rights and obligations, terms	289.0
Basaglar®
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative arrangement, rights and obligations, terms	$ (250.0)