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Basis of Presentation (Unaudited) (Details 4) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Prior Service Cost (Credit), after Tax	$ 75		$ 75		$ 98
Cumulative translation adjustment	(145)		(145)		(144)
Other, net	(5)		(5)		(6)
Total accumulated other comprehensive loss	(75)		(75)		(52)
Unamortized prior service credit, tax expense	24		24		$ 32
Unamortized prior service credit, reclassified from accumulated other comprehensive loss to net earnings	$ 12	$ 15	$ 23	$ 30

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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