ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in Amounts Included in Our Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 8,177
Translation adjustments	(42)	$ 14
Total other comprehensive income	3	358
Balance at end of period	8,082	8,801
Pension
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(1,128)	(1,343)
Other comprehensive income (loss) before reclassifications	20	(24)
Amounts reclassified from accumulated other comprehensive loss to earnings	24	367
Total other comprehensive income	44	343
Balance at end of period	(1,084)	(1,000)
Other Postretirement Benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(12)	(19)
Amounts reclassified from accumulated other comprehensive loss to earnings	1	1
Total other comprehensive income	1	1
Balance at end of period	(11)	(18)
Translation Adjustment And Other
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	236	210
Translation adjustments	(42)	14
Total other comprehensive income	(42)	14
Balance at end of period	194	224
Accumulated other comprehensive loss:
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(904)	(1,152)
Balance at end of period	$ (901)	$ (794)