Collaborations and Other Arrangements - Net Product Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue	$ 11,439.1	$ 9,498.6	$ 31,509.9	$ 24,770.7
Jardiance
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue	686.4	700.8	2,142.5	1,946.6
Basaglar
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue	161.6	179.6	500.0	543.1
Trajenta
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue	91.7	95.2	257.3	284.7
Olumiant
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue	250.8	231.4	695.9	679.2
Tyvyt
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue	$ 150.2	$ 115.1	$ 389.9	$ 279.7