ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 19,242
Other comprehensive income (loss) before reclassifications	131	$ 221
Amounts reclassified from accumulated other comprehensive income	(23)	(28)
Net current period other comprehensive income (loss)	108	193
Balance at end of period	19,051	18,252
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(2,895)	(3,377)
Balance at end of period	(2,787)	(3,184)
Foreign Exchange Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(2,478)	(2,780)
Other comprehensive income (loss) before reclassifications	129	216
Amounts reclassified from accumulated other comprehensive income	(3)	(3)
Net current period other comprehensive income (loss)	126	213
Balance at end of period	(2,352)	(2,567)
Pension and Other Postretirement Benefits Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(415)	(601)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	(17)	(22)
Net current period other comprehensive income (loss)	(17)	(22)
Balance at end of period	(432)	(623)
Changes in Fair Value of Available for Sale Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	1	4
Other comprehensive income (loss) before reclassifications	(6)	(3)
Amounts reclassified from accumulated other comprehensive income	0	0
Net current period other comprehensive income (loss)	(6)	(3)
Balance at end of period	(5)	1
Changes in Fair Value of Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(3)	0
Other comprehensive income (loss) before reclassifications	8	8
Amounts reclassified from accumulated other comprehensive income	(3)	(3)
Net current period other comprehensive income (loss)	5	5
Balance at end of period	$ 2	$ 5