Acquisitions and Divestitures (Acquisitions Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Acquisitions and Divestitures [Line Items]
Acquisition and integration expenses related to prospective and closed acquisitions		$ 1
Maximum [Member]
Acquisitions and Divestitures [Line Items]
Acquisition and integration expenses related to prospective and closed acquisitions	$ 1
Physician Practices Clinics and Other Ancillary Businesses [Member] \| Maximum [Member]
Acquisitions and Divestitures [Line Items]
Business acquisition, cost of acquired entity, purchase price	$ 1

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

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Balance Type:	credit
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