XML 51 R94.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Leases - Lease Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]      
Operating lease cost $ 125    
Short-term lease cost 35    
Total lease cost 160    
Lease expense   $ 199 $ 207
Maximum      
Lessee, Lease, Description [Line Items]      
Other $ 1