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Leases - ROU Assets and Liabilities (Details) $ in Millions | Jun. 30, 2019 USD ($)
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Assets and Liabilities, Lessee [Abstract] |
Financing, ROU assets | $ 22
Financing, current lease liabilities | 9
Financing, long-term lease liabilities | 13
Present value of lease liabilities | 22
Operating, ROU assets | 25
Operating, current lease liabilities | 12
Operating, long-term lease liabilities | 15
Present value of lease liabilities | $ 27

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