SHAREHOLDERS' INTEREST - Changes in Amounts Included in Our Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of year	$ 8,731	$ 8,177
Translation adjustments	(11)	18	$ 26
Balance at end of year	10,767	8,731	8,177
Pension
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of year	(1,064)	(1,128)	(1,343)
Other comprehensive income (loss) before reclassifications	254	(223)	(216)
Amounts reclassified from accumulated other comprehensive income (loss) to earnings	90	287	431
Total other comprehensive income	344	64	215
Balance at end of year	(720)	(1,064)	(1,128)
Other Post-Employment Benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of year	(12)	(12)	(19)
Other comprehensive income (loss) before reclassifications	6	(3)	6
Amounts reclassified from accumulated other comprehensive income (loss) to earnings	4	3	1
Total other comprehensive income	10	0	7
Balance at end of year	(2)	(12)	(12)
Translation Adjustment And Other
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of year	254	236	210
Translation adjustments	(11)	18	26
Total other comprehensive income	(11)	18	26
Balance at end of year	243	254	236
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of year	(822)	(904)	(1,152)
Total other comprehensive income	343	82	248
Balance at end of year	$ (479)	$ (822)	$ (904)