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INCOME TAX - (Details) - USD ($) $ in Millions	6 Months Ended
INCOME TAX - (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Major components of tax expense (income) [abstract]
Income tax expense	$ 149	$ 184
Deferred tax benefit resulting from higher projected future taxable income due to lending activities to subsidiaries	387
Deferred tax expense resulting from tax rate reduction	$ 340
Deferred tax benefit resulting from tax integration		$ 603

- Definition

The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

+ References + Details