Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic EPS
Net earnings attributable to AbbVie Inc.	$ 4,044	$ 11,542	$ 4,616	$ 7,882
Earnings allocated to participating securities		74	60	40
Earnings available to common shareholders		$ 11,468	$ 4,556	$ 7,842
Weighted-average basic shares outstanding (in shares)		1,770	1,667	1,481
Basic earnings per share (in dollars per share)	$ 2.27	$ 6.48	$ 2.73	$ 5.30
Diluted EPS
Net earnings attributable to AbbVie Inc.	$ 4,044	$ 11,542	$ 4,616	$ 7,882
Earnings allocated to participating securities		74	60	40
Earnings available to common shareholders		$ 11,468	$ 4,556	$ 7,842
Weighted-average basic shares outstanding (in shares)		1,770	1,667	1,481
Effect of dilutive securities (in shares)		7	6	3
Weighted-average diluted shares outstanding (in shares)		1,777	1,673	1,484
Diluted earnings per share (in dollars per share)	$ 2.26	$ 6.45	$ 2.72	$ 5.28