Annual report pursuant to Section 13 and 15(d)

GENERAL - U.S. TAX REFORM ACT (Details)

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GENERAL - U.S. TAX REFORM ACT (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
U.S. Tax Reform Act      
U.S. income tax statutory rate (as a percent)     35.00%
Income tax benefit from remeasurement of deferred assets and liabilities $ 52   $ 137
Provisional tax expense due to the transition tax on deemed repatriation of deferred foreign income     85
Provisional transition tax liability, if second offering and tax-related restructuring transactions absent $ 12   $ 12
Forecast      
U.S. Tax Reform Act      
U.S. income tax statutory rate (as a percent)   21.00%