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Summary of Significant Accounting Policies - Schedule of Maturities of Lease Liabilities Related to Operating Leases (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Accounting Policies [Abstract]  
2019 (for the remainder of fiscal 2019) $ 185
2020 245
2021 201
2022 156
2023 98
After 2023 214
Total lease payments 1,099
Less: Interest 88
Present Value of lease liabilities $ 1,011