Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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Acquisitions and Assets Held for Sale - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended	3 Months Ended			5 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Jun. 02, 2023	May 01, 2023	Feb. 21, 2023	Feb. 28, 2023	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	May 02, 2023	Mar. 29, 2023
Business Acquisition [Line Items]
Proceeds from debt	$ 4,900	$ 5,000	$ 6,000	$ 6,000
Amortization of intangible assets					$ 509		$ 458			$ 1,396	$ 1,380
Loss on assets held for sale					$ 0		$ 2,480			349	$ 2,521
Disposal Group, Held-for-sale, Not Discontinued Operations \| Omnicare Long-Term Care Business \| Pharmacy & Consumer Wellness
Business Acquisition [Line Items]
Loss on assets held for sale						$ 349						$ 2,500
Oak Street Health Inc.
Business Acquisition [Line Items]
Percentage of voting interests acquired													100.00%
Cash to be received by shareholders in proposed acquisition (in dollars per share)													$ 39.00
Deferred income taxes													$ 773
Revenues since acquisition date								$ 1,300
Operating losses since acquisition date								304
Amortization of intangible assets								121
Stock-based compensation								$ 51
Transaction costs										77
Signify Health, Inc.
Business Acquisition [Line Items]
Percentage of voting interests acquired														100.00%
Cash to be received by shareholders in proposed acquisition (in dollars per share)														$ 30.50
Deferred income taxes														$ 272
Revenues since acquisition date									$ 528
Transaction costs										$ 37
Goodwill deductible for income tax purposes														$ 1,700