RELATED PARTY TRANSACTIONS - SCHEDULE OF INVESTMENT MANAGEMENT AND SERVICE FEES (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transactions [Abstract]
Investment management and services fees	$ 1,148	$ 999	$ 1,056
Distribution revenues	398	372	415
Other revenues - shareholder servicing fees	73	76	85
Other revenues - other	$ 7	$ 6	$ 5

Amount of fees from providing distribution and shareholder services. Distribution services include, but are not limited to, marketing and selling fund shares, advertising, printing and mailing of prospectuses and sales literature to investors. Shareholder services include, but are not limited to, answering shareholder inquiries and providing shareholders with investment information.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration