Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Common stock par value (in dollars per share)	$ 0.0001
Investment securities	$ 1,532	$ 283
Related party amount, due to related party \| GE
Assets held on behalf of GE	45	273
Cash and cash equivalents held on behalf of GE	44	162
Investment securities	$ 1	$ 111
Class A
Common stock par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock authorized (in shares)	2,000,000,000	2,000,000,000
Common stock issued (in shares)	724,000,000	650,000,000
Common stock outstanding (in shares)	724,000,000	650,000,000
Class B
Common stock par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock authorized (in shares)	1,250,000,000	1,250,000,000
Common stock issued (in shares)	311,000,000	377,000,000
Common stock outstanding (in shares)	311,000,000	377,000,000

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