Summary Of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013	Dec. 31, 2013 Termination Of A - 12 Program [Member]	Jun. 29, 2014 Axle Business [Member]
Loss Contingencies [Line Items]
Asset Impairment Charges						$ 106
Loss Contingency, Settlement Agreement, Consideration					198
Length of fiscal quarters, weeks			0 years 0 months 91 days
Net increase in operating earnings from the quarterly impact of revisions in contract	$ 62	$ 83	$ 100	$ 191
Net increase in operating earnings per share from the quarterly impact of revisions in contract	$ 0.12	$ 0.15	$ 0.19	$ 0.35