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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of cash, cash equivalents and restricted cash and cash equivalents at end of period:
Cash and cash equivalents	$ 553	$ 3,561	$ 61
Restricted cash and cash equivalents included in other current assets	28	15	49
Restricted cash and cash equivalents included in restricted trust and escrow accounts	67	71	73
Cash, cash equivalents and restricted cash and cash equivalents at end of period	$ 648	$ 3,647	$ 183

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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