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Investments Narrative (Details) - naviHealth [Member] - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Aug. 01, 2018
Investment [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		44.00%
Partnership Indirect Ownership		100.00%
Equity Method Investments	$ 344	$ 358
Proceeds from Equity Method Investment, Distribution, Return of Capital	$ 14

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Partnership Indirect Ownership

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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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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 280
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-Section 50
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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21D
-URI http://asc.fasb.org/extlink&oid=109223946&loc=SL94080555-108585

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-Publisher FASB
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