XML 61 R85.htm IDEA: XBRL DOCUMENT v3.20.1
Supplemental Disclosures (Schedule of Cash, Cash Equivalents, and Restricted Cash) (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Cash, cash equivalents, and restricted cash:        
Cash and cash equivalents $ 1,453 $ 1,552    
Restricted cash - other current assets 81 0    
Total cash, cash equivalents, and restricted cash $ 1,534 $ 1,552 $ 745 $ 986