Quarterly report pursuant to Section 13 or 15(d)

Leases - Narrative (Details)

v3.21.2
Leases - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Lessee, Lease, Description [Line Items]        
Operating lease expense $ 68 $ 72 $ 134 $ 134
Lease liabilities reduced by cash paid 71   138  
ROU assets from new operating leases in exchange for lease liability     12  
Operating lease liability, leases commenced $ 108   108  
Operating leases not yet commenced     $ 57  
Weighted average remaining lease term 9 years 4 months 24 days   9 years 4 months 24 days  
Weighted-average discount rate for operating leases 3.30%   3.30%  
Minimum        
Lessee, Lease, Description [Line Items]        
Operating leases, not yet commenced, lease term 5 years   5 years  
Maximum        
Lessee, Lease, Description [Line Items]        
Operating leases, not yet commenced, lease term 9 years   9 years