Consolidated Statements of Cash Flows (Supplemental Disclosure) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Cash and cash equivalents	$ 2,016	$ 1,734	$ 370
Restricted cash and restricted cash equivalents included in Other current assets	184	208	288
Restricted cash equivalents included in Other long-term assets	53	52	42
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 2,253	$ 1,995	$ 700	$ 607