Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional (Details)

v3.19.1
Leases - Additional (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Operating lease, right-of-use asset $ 624    
Lease liability 739    
Straight-line lease liabilities $ (2,007)   $ (1,259)
Lease terms 12 months    
Operating lease expense $ 50    
Lease liabilities reduced by cash paid 64    
Right-of-use assets obtained in exchange for operating lease obligations 32    
Operating leases not yet commenced $ 13    
Weighted average remaining lease term 6 years 1 month 15 days    
Weighted-average discount rate for operating leases 4.60%    
Minimum      
Lessee, Lease, Description [Line Items]      
Lease terms 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Lease terms 5 years    
ASU 2016-02      
Lessee, Lease, Description [Line Items]      
Operating lease, right-of-use asset   $ 661  
Lease liability   774  
ASU 2016-02 | Restatement Adjustment      
Lessee, Lease, Description [Line Items]      
Straight-line lease liabilities   $ 113