Other (Income) Expense, Net Other (Income) Expense, Net - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Component of Other Income / Expense of Nonoperating [Line Items]
Interest paid	$ 605	$ 629
Healthcare Services Segment
Component of Other Income / Expense of Nonoperating [Line Items]
Goodwill, Impairment Loss		$ 162

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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