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Investments (Narrative) (Details) - naviHealth [Member] - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2018	Aug. 01, 2018
Investment [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		44.00%
Partnership Indirect Ownership		100.00%
Equity Method Investments	$ 343	$ 358
Income (Loss) from Equity Method Investments	1
Proceeds from Equity Method Investment, Distribution, Return of Capital	$ 14

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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