Unaudited Consolidated Statements of Cash Flows - Supplemental Information - USD ($) $ in Millions	Mar. 31, 2020		Dec. 31, 2019	Mar. 31, 2019		Dec. 31, 2018
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 579		$ 329	$ 181
Restricted cash	266		283	339
Total cash, cash equivalents, and restricted cash	$ 845	[1]	$ 612	$ 520	[1]	$ 561

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amount reported within the consolidated balance sheets. Cash and cash equivalents of $579 and $181, Restricted cash of $266 and $339 and Total cash, cash equivalents, and restricted cash of $845 and $520 as of March 31, 2020, and March 31, 2019, respectively