Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Schedule of Operating Leases) (Details)

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Commitments and Contingencies (Schedule of Operating Leases) (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 6
2020 4
2021 3
2022 2
Total $ 15