SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 3,213	[1]	$ 4,849	[1]	$ 3,537	[1]	$ 2,928	[1]	$ 2,803	[1]	$ 4,434	[1]	$ 3,025	[1]	$ 2,419	[1]	$ 14,527	$ 12,681		$ 10,743
Gross profit									2,763	[1]	4,380	[1]	2,957	[1]	2,339	[1]		12,439		10,328
Net income	$ 646	[2]	$ 1,768		$ 977		$ 607		$ (555)	[2]	$ 1,720		$ 720		$ 456		$ 3,998	$ 2,341	[3]	$ 2,135	[3]
Net income applicable to common stockholders per basic common share	$ 14.00		$ 37.39		$ 20.34		$ 12.56		$ (11.41)	[2]	$ 35.12		$ 14.66		$ 9.26		$ 84.26	$ 47.78		$ 43.14
Net income applicable to common stockholders per diluted common share	$ 13.86		$ 37.02		$ 20.13		$ 12.34		$ (11.41)	[2]	$ 34.43		$ 14.39		$ 9.11		$ 83.26	$ 46.86		$ 42.65
Income tax benefit to adjust provisional tax expense	$ (46)																$ (46)	$ 1,563		$ 0
Transition tax for accumulated foreign earnings, provisional income tax expense (benefit)									$ 1,600
Change In tax rate, deferred tax, provisional income tax expense (benefit)									$ 217

[1] For periods beginning after December 31, 2017, the Company reports revenues in accordance with the current revenue standard and no longer presents "Cost of revenues" or "Gross profit" in its Consolidated Statement of Operations. For all periods prior to January 1, 2018, the Company reported under the previous revenue standard. See Note 2 for further information.

[2] Includes, for the fourth quarter of 2018, an income tax benefit of $46 million to adjust the 2017 provisional tax expense related to a one-time transitional tax on mandatory deemed repatriation of accumulated unremitted international earnings as a result of the Tax Act. The income tax provision for the fourth quarter of 2017 includes a provisional tax expense of approximately $1.6 billion related to the transition tax mentioned above and a provisional tax benefit of $217 million related to the remeasurement of the Company’s U.S. deferred tax assets and liabilities as a result of the Tax Act.

[3] The Company realized net gains of $1 million related to investments in debt securities sold for both years ended December 31, 2017 and 2016.