REVENUE RECOGNITION - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jan. 01, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales return provisions			$ 4,062,000,000	$ 3,697,000,000
Cooperative advertising credits included in rebates	$ 1,951,000,000	$ 1,902,000,000	1,951,000,000	1,902,000,000		$ 1,813,000,000		$ 2,050,000,000
Price appreciation credits	2,111,000,000	2,138,000,000	6,238,000,000	5,814,000,000
Price Appreciation Credit
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Price appreciation credits			1,000,000	4,000,000
Returns
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales return provisions			94,000,000	71,000,000
Reduction in variable consideration provision, adjustment	28,000,000	38,000,000
Cooperative advertising credits included in rebates	502,000,000	577,000,000	502,000,000	577,000,000		$ 575,000,000		$ 691,000,000
Rebates, Advertising Credits Portion
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cooperative advertising credits included in rebates	$ 38,000,000	$ 33,000,000	$ 38,000,000	$ 33,000,000	$ 32,000,000		$ 29,000,000