GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 23,745,340	$ 23,759,740
Other intangible assets:
Other intangible assets	15,189,894	15,184,846
Less accumulated amortization:
Less accumulated amortization	2,938,214	2,030,191
Other intangible assets, net	12,251,680	13,154,655
Customer-related intangible assets
Other intangible assets:
Other intangible assets	9,231,143	9,238,728
Less accumulated amortization:
Less accumulated amortization	1,729,192	1,225,785
Acquired technologies
Other intangible assets:
Other intangible assets	2,743,679	2,732,218
Less accumulated amortization:
Less accumulated amortization	852,219	576,928
Contract-based intangible assets
Other intangible assets:
Other intangible assets	1,976,577	1,974,429
Less accumulated amortization:
Less accumulated amortization	109,833	82,225
Trademarks and trade names
Other intangible assets:
Other intangible assets	1,238,495	1,239,471
Less accumulated amortization:
Less accumulated amortization	$ 246,970	$ 145,253