Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2012

Retirement Plans [Abstract]

Components of net periodic benefit cost

	Pension Benefits						Postretirement Benefits Other  Than Pensions
(In millions)	March 31, 2012			April 2, 2011			March 31, 2012			April 2, 2011
Three Months Ended
Service cost	$	30		$	32		$	2		$	2
Interest cost		76			82			6			8
Expected return on plan assets		(101	)		(98	)		—			—
Amortization of prior service cost (credit)		4			4			(3	)		(1	)
Amortization of net loss		29			19			2			3
Net periodic benefit cost	$	38		$	39		$	7		$	12