Collaborations and Other Arrangements (Milestones (Deferred) Capitalized) (Details) - Milestone Payments, Development and Regulatory, Capitalized (Deferred), Cumulative $ in Millions	Dec. 31, 2020 USD ($)
Trajenta®
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestones payments	$ 446.4
Jardiance
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestones payments	289.0
Basaglar®
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestones payments	$ (250.0)