Summary of significant accounting policies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) operating_segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of business segment | operating_segment	1
Sales return provisions as a percentage of gross product sales (less than)	1.00%
Advertising cost | $	$ 647	$ 841	$ 843
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue payment term	30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue payment term	120 days