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OTHER - Equity Method Investee Impairment (Narrative) (Details) - Advanced Military Maintenance, Repair and Overhaul Center - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 26, 2017	Sep. 30, 2018
Schedule of Equity Method Investments [Line Items]
Charge included in equity earnings	$ 64
Equity method investee impairment, after tax	$ 40
Equity method investee impairment (in dollars per share)	$ 0.14
Equity method investments		$ 560

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Equity method investment other than temporary impairment earnings per share.

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-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 35
-Paragraph 32
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