XML 109 R88.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Cash and Noncash Information of Leases (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Cash paid for amounts included in the measurement of lease liabilities $ 177 $ 148
ROU assets obtained in exchange for lease obligations $ 101 $ 163