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Leases Lease Balance Sheet (Details 2) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Assets and Liabilities, Lessee [Abstract]    
Operating lease right-of-use assets $ 1,511 $ 0
Operating Lease, Liability, Current 261  
Operating Lease, Liability, Noncurrent 1,308 $ 0
Total operating lease liabilities $ 1,569