REVENUE RECOGNITION - Deferred Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Deferred Contract Costs
Deferred costs	$ 2,387		$ 2,185
Deferred costs, current	1,143		920
Deferred costs, noncurrent	1,244		1,265
Total deferred costs amortized	455
Amortization of deferred costs	136	$ 160
Deferred transition costs
Deferred Contract Costs
Deferred costs	961		1,012
Total deferred costs amortized	112
Prepaid software costs
Deferred Contract Costs
Deferred costs	806		658
Total deferred costs amortized	207
Capitalized costs to fulfill contracts
Deferred Contract Costs
Deferred costs	302		235
Capitalized costs to obtain contracts
Deferred Contract Costs
Deferred costs	$ 318		$ 282
Minimum
Deferred Contract Costs
Term of contract with customer	3 years
Maximum
Deferred Contract Costs
Term of contract with customer	6 years