U.K. Pension Plan Assumptions (Details) - Freightliner U.K. Pension Plan [Member] $ in Millions	9 Months Ended
	Dec. 31, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.20%
Price inflation (RPI measure)	3.00%
Pension increases (CPI measure)	1.70%
Salary increases	3.40%
Expected return on plan assets	5.90%
Defined Benefit Plan, Effect of One Percentage Point Increase on Discount Rate Component	$ 69.3
Defined Benefit Plan, Effect of One Percentage Point Decrease on Discount Rate Component	69.3
Defined Benefit Plan, Effect of One Percentage Point Increase on Retail Price Index Component	69.3
Defined Benefit Plan, Effect of One Percentage Point Decrease on Retail Price Index Component	$ 69.3