Revenues - Customer Concentration, Product Sales (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) customer	Dec. 31, 2020 USD ($) customer	Dec. 31, 2019 USD ($) customer
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 25,979	$ 25,424	$ 23,362
Number of major customers (as defined) accounting for more than 10% of total revenue | customer	3	3	3
Major customers (as defined) accounting for more than 10% of gross trade receivables | customer	3	3
Product [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 24,297	$ 24,240	$ 22,204
Product [Member] | AmerisourceBergen Corporation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 14,783	$ 14,743	$ 12,301
Gross product sales to major customer (as defined) as a percentage of total gross revenues	32.00%	34.00%	33.00%
Product [Member] | McKesson Corporation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 15,187	$ 13,779	$ 11,795
Gross product sales to major customer (as defined) as a percentage of total gross revenues	33.00%	32.00%	31.00%
Product [Member] | Cardinal Health, Inc. [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 7,681	$ 7,332	$ 6,538
Gross product sales to major customer (as defined) as a percentage of total gross revenues	17.00%	17.00%	17.00%