Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies [Abstract]

Accumulated Other Comprehensive Loss

(In millions)	2011			2010
Postretirement benefit plan adjustments	$	(11,186	)	$	(8,994	)
Other, net		(71	)		(16	)
Accumulated other comprehensive loss	$	(11,257	)	$	(9,010	)