v3.19.3.a.u2
Leases - Operating Leases as Lessee (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Lessee, Lease, Description  
Options to extend the lease term true
Operating lease renewal term 10 years
Options to terminate the lease early true
Lease, Cost  
Operating lease cost $ 314
Cash paid for amounts included in the measurement of operating lease liabilities 253
ROU assets arising from entering into new operating lease obligations $ 310
Weighted average remaining lease term - operating leases 8 years
Weighted average discount rate - operating leases 3.90%
Minimum  
Lessee, Lease, Description  
Operating lease contract term 1 year
Maximum  
Lessee, Lease, Description  
Operating lease contract term 10 years