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Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2019
Related Party Transactions [Abstract]  
Related Party Transactions
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(In millions)
2019
 
2018
 
2019
 
2018
Transactions with Horseshoe Baltimore
 
 
 
 
 
 
 
Management fees
$
2

 
$
2

 
$
5

 
$
5

Allocated expenses
2

 
2

 
3

 
3