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Revenues - Customer Concentration, Product Sales (Details) $ in Millions | 12 Months Ended
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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%

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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