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Leases - Supplemental Cash Flows (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]      
Operating cash flows for operating leases $ 578 $ 556 $ 505
Operating cash flows for finance leases 6 4 2
Financing cash flows for finance leases 25 17 11
Operating leases 932 392 478
Finance leases 39 $ 38 $ 51
Kuehne + Nagel      
Lessee, Lease, Description [Line Items]      
Operating leases 281    
Finance leases $ 23