EMPLOYEE STOCK BENEFIT PLANS Share-based Payment Arrangement, Nonvested Award, Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 29
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 1 month 6 days
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 1,079
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years 10 months 24 days
Market share units [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 87
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	3 years 4 months 24 days
Performance Shares [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 144
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years 2 months 12 days