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Leases Supplemental Balance Sheet Information (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Leases [Abstract]  
Operating Lease, Liability, Noncurrent $ 341
Operating Lease, Liability, Current 104
Operating Lease, Right-of-Use Asset 426
Total operating lease liabilities 445
Total finance lease liabilities 34
Finance Lease, Right-of-Use Asset, after Accumulated Amortization 33
Finance Lease, Liability, Current 9
Finance Lease, Liability, Noncurrent $ 25