U.K. Pension Plan Major Categories of Plan Assets (Details) - Mar. 25, 2015 - Freightliner U.K. Pension Plan [Member] £ in Thousands, $ in Thousands	GBP (£)	USD ($)
Defined Benefit Plan Disclosure [Line Items]
U.K. Pension Plan assets by major category	£ 184,470	$ 274,787
Growth pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
U.K. Pension Plan assets by major category	122,016	181,755
Defensive pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
U.K. Pension Plan assets by major category	24,034	35,801
Private equity pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
U.K. Pension Plan assets by major category	20,725	30,872
Government bond pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
U.K. Pension Plan assets by major category	10,222	15,227
Infrastructure pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
U.K. Pension Plan assets by major category	£ 7,473	$ 11,132