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Basis of Presentation, Uses of Estimates and Significant Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accounts Receivable, after Allowance for Credit Loss, Current | $ 17,681 | $ 14,216 |
Revenue, Remaining Performance Obligation, Amount | 12,500 |  |
Other current receivables | 12,769 | 13,866 |
Inventory, Net | $ 3,500 | 2,900 |
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Other Liabilities |  |
Accounts payable and accrued liabilities | $ 27,715 | 24,643 |
Other Liabilities, Current | $ 26,281 | 22,975 |
Number Of Days Notice Required To Cancel Health Insurance Contract | 30 days |  |
Goodwill, Impairment Loss | $ 0 | 0 | $ 0
Impairment of Intangible Assets (Excluding Goodwill) | $ 0 | 0 | $ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 |  |  |
Revenue, Remaining Performance Obligation, Percentage | 50.00% |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 3 years |  |
Other Current Liabilities [Member] |  |  |
Health savings account deposits | $ 13,500 | 11,400 |
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Employee Stock Purchase Plan (ESPP) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date | 10.00% |  |
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Share-based Compensation Arrangement by Share-based Payment Plan Award, Options, Award Exercisable Period | 10 years |  |
Health Insurance Product Line [Member] |  |  |
Short-duration Insurance Contracts, Historical Claims Duration, First 90 Days | 0.90 |  |
Products and services [Member] |  |  |
Accounts Receivable, after Allowance for Credit Loss, Current | $ 7,100 | 5,400 |
Pharmaceutical Manufacturer Rebates Receivable [Member] |  |  |
Other current receivables | 8,200 | 7,200 |
Medicare Part D Receivables [Member] |  |  |
Other current receivables | $ 1,300 | $ 3,400 |

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