Reconciliation of Benefit Obligations, Plan Assets, and Unfunded or Funded Status (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 29, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Accrued pension liabilities	$ 10,046	$ 9,361
Qualified defined benefit pension plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.25%	4.75%	4.00%
Expected return on plan assets	4.00%
Actual return on plan assets	6.70%
Accrued pension liabilities	10,046
Prepaid pension assets	$ 209
Qualified defined benefit pension plans | Annual
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	8.00%