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Noncontrolling Interests (Tables)
 12 Months Ended
Mar. 31, 2019
Noncontrolling Interest [Abstract]  
Redeemable Noncontrolling Interests
The table below presents the reconciliation of changes in redeemable noncontrolling interests:

 
Year Ended
 
March 31,
 
2019
 
2018
 
2017
 
(Amounts in millions)
Beginning balance
$
101.8

 
$
93.8

 
$
90.5

Initial fair value of redeemable noncontrolling interests
15.8

 
—

 
—

Net income (loss) attributable to noncontrolling interests
(16.2
)
 
0.5

 
(0.3
)
Noncontrolling interest discount accretion
22.1

 
6.1

 
5.0

Adjustments to redemption value
6.5

 
9.3

 
5.5

Cash distributions
(2.4
)
 
(7.9
)
 
(6.9
)
Ending balance
$
127.6

 
$
101.8

 
$
93.8