Quarterly report pursuant to Section 13 or 15(d)

Leases - Narrative (Details)

v3.21.2
Leases - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2021
Lessee, Lease, Description [Line Items]            
Operating lease expense   $ 123 $ 68 $ 257 $ 202  
Lease liabilities reduced by cash paid   136   274    
ROU assets from new operating leases in exchange for lease liability   2,396   2,504    
Increase in operating lease liabilities   $ 2,396   2,504    
Operating leases not yet commenced       $ 43    
Weighted average remaining lease term   21 years 4 months 24 days   21 years 4 months 24 days   9 years 2 months 12 days
Weighted-average discount rate for operating leases   5.70%   5.70%    
Minimum            
Lessee, Lease, Description [Line Items]            
Operating leases, not yet commenced, lease term   2 years   2 years    
Maximum            
Lessee, Lease, Description [Line Items]            
Operating leases, not yet commenced, lease term   9 years   9 years    
Circle Health            
Lessee, Lease, Description [Line Items]            
Acquisition, interests acquired 60.00%          
ROU assets from new operating leases in exchange for lease liability $ 2,351          
Increase in operating lease liabilities $ 2,351          
Weighted average remaining lease term   28 years 10 months 24 days   28 years 10 months 24 days