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BRW Term Loan (Details) - USD ($) shares in Millions, $ in Millions | Jun. 30, 2019 | Nov. 30, 2018
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying amount of loan receivable | $ 489 |
BRW |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loan amount |  | $ 456
Number of shares pledged as collateral (in shares) |  | 516.0
Implied value equivalent of shares pledged as collateral (in ADRs) |  | 64.5

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