Pension Benefits Tables (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
United states pension plan of US entity, defined benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	$ 0	$ 0
Interest cost on projected benefit obligation	5	5
Expected return on assets	(5)	(5)
Amortization of unrecognized actuarial loss and prior service costs	9	4
Net periodic pension expense	9	4
Foreign pension plan, defined benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	5	4
Interest cost on projected benefit obligation	6	9
Expected return on assets	(8)	(7)
Amortization of unrecognized actuarial loss and prior service costs	1	1
Net periodic pension expense	$ 4	$ 7