GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 23,679,923	$ 23,759,740
Other intangible assets:
Other intangible assets	15,178,287	15,184,846
Less accumulated amortization:
Less accumulated amortization	2,639,666	2,030,191
Other intangible assets, net	12,538,621	13,154,655
Customer-related intangible assets
Other intangible assets:
Other intangible assets	9,204,915	9,238,728
Less accumulated amortization:
Less accumulated amortization	1,552,272	1,225,785
Acquired technologies
Other intangible assets:
Other intangible assets	2,763,538	2,732,218
Less accumulated amortization:
Less accumulated amortization	775,610	576,928
Contract-based intangible assets
Other intangible assets:
Other intangible assets	1,972,143	1,974,429
Less accumulated amortization:
Less accumulated amortization	98,826	82,225
Trademarks and trade names
Other intangible assets:
Other intangible assets	1,237,691	1,239,471
Less accumulated amortization:
Less accumulated amortization	$ 212,958	$ 145,253