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Goodwill and Other Intangibles - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill impairment		$ 0	$ 0	$ 431
Goodwill		91,272	78,150	79,121
Cumulative goodwill impairments		6,600	6,600
Amortization of intangible assets		$ 1,905	$ 1,785	2,233
Long-Term Care Reporting Unit
Goodwill [Line Items]
Goodwill impairment	$ 431
Goodwill				$ 0

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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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