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Leases - Narrative (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Lessee, Lease, Description [Line Items]  
Operating lease, lease not yet commenced $ 568
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Property and equipment, net
Finance lease, lease not yet commenced $ 15
Minimum  
Lessee, Lease, Description [Line Items]  
Operating lease, lease not yet commenced, term (in years) 1 year
Finance lease, lease not yet commenced, term (in years) 1 year
Maximum  
Lessee, Lease, Description [Line Items]  
Operating lease, lease not yet commenced, term (in years) 11 years
Finance lease, lease not yet commenced, term (in years) 11 years