Adjusted Operating Income (Loss)

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- Definition

Former Gain Contingency, Recognized in Current Period, Before Tax

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Number of Under Performing Stores, Planned Closure

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- Definition

Store Rationalization Charges

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- Definition

Amount of increase in allowance for credit loss on accounts receivable, from recovery.

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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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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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Face (par) amount of debt instrument at time of issuance.

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The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

The net amount of operating interest income (expense).

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The net result for the period of deducting operating expenses from operating revenues.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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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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- Definition

The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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Segment Reporting - Reconciliation of Operating Earnings to Net Income (Details)			3 Months Ended		12 Months Ended
	Jul. 31, 2020 USD ($)	Jan. 02, 2018 USD ($)	Sep. 30, 2019 USD ($) store	Mar. 31, 2019 USD ($) store	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Aug. 31, 2019 USD ($)	Mar. 09, 2018 USD ($)
Segment Reporting Information [Line Items]
Operating income (GAAP measure)					$ 13,911,000,000	$ 11,987,000,000	$ 4,021,000,000
Amortization of intangible assets					2,341,000,000	2,436,000,000	1,006,000,000
Acquisition-related transaction and integration costs					332,000,000	480,000,000	492,000,000
(Gain) loss on divestiture of subsidiary					(269,000,000)	205,000,000	86,000,000
Receipt of fully reserved ACA risk corridor receivable					(307,000,000)	0	0
Store rationalization charges					0	231,000,000	0
Impairments					0	0	6,149,000,000
Impairment of long-lived assets					0	0	43,000,000
Interest income on financing for the Aetna Acquisition					0	0	(536,000,000)
Adjusted operating income					16,008,000,000	$ 15,339,000,000	11,261,000,000
U.S. Department of Health and Human Services, ACA Risk Corridor Receivables [Member] \| Settled Litigation
Segment Reporting Information [Line Items]
Gain contingency, unrecorded amount								$ 313,000,000
Former gain contingency, recognized in current period, before tax					307,000,000
Retail/ LTC
Segment Reporting Information [Line Items]
Store rationalization charges			$ 96,000,000	$ 135,000,000
Impairments							6,149,000,000
Number of under performing stores, planned closure \| store			22	46
RX Crossroads
Segment Reporting Information [Line Items]
(Gain) loss on divestiture of subsidiary							(725,000,000)
RX Crossroads \| Retail/ LTC \| Discontinued Operations, Disposed of by Sale
Segment Reporting Information [Line Items]
(Gain) loss on divestiture of subsidiary							$ 86,000,000
Proceeds from sale of subsidiary		$ 725,000,000
Coventry Health Care Workers Compensation Business \| Health Care Benefits \| Discontinued Operations, Disposed of by Sale
Segment Reporting Information [Line Items]
(Gain) loss on divestiture of subsidiary					$ 269,000,000
Proceeds from sale of subsidiary	$ 850,000,000
2018 Senior Notes
Segment Reporting Information [Line Items]
Debt issued in acquisition									$ 40,000,000,000