Pension Benefits Pension Benefits Tables (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension expense	$ 11	$ 11
United States Pension Plan of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	0	1
Interest cost on projected benefit obligation	5	5
Expected return on assets	(5)	(5)
Amortization of unrecognized actuarial loss, prior service costs and net transitional obligation	4	9
Net periodic pension expense	4	10
Foreign Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	4	1
Interest cost on projected benefit obligation	9	1
Expected return on assets	(7)	(2)
Amortization of unrecognized actuarial loss, prior service costs and net transitional obligation	1	1
Net periodic pension expense	$ 7	$ 1