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Investments Narrative (Details) - naviHealth [Member] - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Aug. 31, 2018	Sep. 30, 2018	Sep. 30, 2019	Jun. 30, 2019	Aug. 01, 2018
Investment [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent					98.00%
Proceeds from Divestiture of Businesses	$ 737
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					44.00%
Partnership Indirect Ownership					100.00%
Pre-Tax Gain on Divestiture		$ 508
Equity Method Investments			$ 329	$ 334

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Partnership Indirect Ownership

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Pre-Tax Gain on Divestiture

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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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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