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Pension Benefits (Tables)
 9 Months Ended
Dec. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of net periodic expense for defined pension benefit plans
The net periodic expense for our defined pension benefit plans is as follows:
 
U.S. Plans
 
Non-U.S. Plans
 
U.S. Plans
 
Non-U.S. Plans
 
Quarter Ended December 31,
 
Quarter Ended December 31,
 
Nine Months Ended December 31,
 
Nine Months Ended December 31,
(In millions)
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Service cost - benefits earned during the year
$
1

 
$
—

 
$
4

 
$
4

 
$
3

 
$
1

 
$
14

 
$
13

Interest cost on projected benefit obligation
4

 
5

 
6

 
8

 
13

 
14

 
18

 
26

Expected return on assets
(5
)
 
(5
)
 
(7
)
 
(8
)
 
(14
)
 
(16
)
 
(23
)
 
(23
)
Amortization of unrecognized actuarial loss and prior service costs
11

 
5

 
1

 
1

 
32

 
15

 
3

 
3

Curtailment loss (gain)
—

 
—

 
—

 
5

 
—

—

—

 
—

 
5

Net periodic pension expense
$
11

 
$
5

 
$
4

 
$
10

 
$
34

 
$
14

 
$
12

 
$
24