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Business Combinations Acquired Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Business Combination, Separately Recognized Transactions [Line Items] |  |  |
Goodwill | $ 93,352 | $ 75,795 | $ 71,337
Change Healthcare Acquisition |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |
Cash and cash equivalents | 222 |  |
Accounts receivable and other current assets | 925 |  |
Assets held-for-sale | 2,310 |  |
Property, equipment and other long-term assets | 254 |  |
Other intangible assets | 4,050 |  |
Total identifiable assets acquired | 7,761 |  |
Medical costs payable | 0 |  |
Accounts payable and other current liabilities | (1,017) |  |
Liabilities held-for-sale | (101) |  |
Other long-term liabilities | (1,193) |  |
Total identifiable liabilities acquired | (2,311) |  |
Total net identifiable assets | 5,450 |  |
Goodwill | 8,496 |  |
Redeemable noncontrolling interests | 0 |  |
Nonredeemable noncontrolling interests | 0 |  |
Net assets acquired | 13,946 |  |
Other Acquisitions |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |
Cash and cash equivalents | 523 |  |
Accounts receivable and other current assets | 696 |  |
Assets held-for-sale | 0 |  |
Property, equipment and other long-term assets | 1,882 |  |
Other intangible assets | 1,764 |  |
Total identifiable assets acquired | 4,865 |  |
Medical costs payable | (308) |  |
Accounts payable and other current liabilities | (843) |  |
Liabilities held-for-sale | 0 |  |
Other long-term liabilities | (713) |  |
Total identifiable liabilities acquired | (1,864) |  |
Total net identifiable assets | 3,001 |  |
Goodwill | 9,214 |  |
Redeemable noncontrolling interests | 3,108 |  |
Nonredeemable noncontrolling interests | 370 |  |
Net assets acquired | 8,737 |  |
Acquisitions |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |
Cash and cash equivalents | 745 |  |
Accounts receivable and other current assets | 1,621 |  |
Assets held-for-sale | 2,310 |  |
Property, equipment and other long-term assets | 2,136 |  |
Other intangible assets | 5,814 |  |
Total identifiable assets acquired | 12,626 |  |
Medical costs payable | (308) |  |
Accounts payable and other current liabilities | (1,860) |  |
Liabilities held-for-sale | (101) |  |
Other long-term liabilities | (1,906) |  |
Total identifiable liabilities acquired | (4,175) |  |
Total net identifiable assets | 8,451 |  |
Goodwill | 17,710 |  |
Redeemable noncontrolling interests | 3,108 |  |
Nonredeemable noncontrolling interests | 370 |  |
Net assets acquired | $ 22,683 |  |

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