Fair Value (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value [Abstract]

Assets and liabilities measured at fair value on recurring basis

(In millions)	Level 1		Level 2		Level 3		Total
Cash and Cash Equivalents:
Prime money market funds	$	1,634	$	—	$	—	$	1,634
Total cash and cash equivalents	$	1,634	$	—	$	—	$	1,634
Derivative Asset:
Interest rate swaps — fixed to floating rate	$	—	$	95	$	—	$	95
Total derivative asset	$	—	$	95	$	—	$	95

(In millions)	Level 1		Level 2		Level 3		Total
Cash and Cash Equivalents:
Prime money market funds	$	2,063	$	—	$	—	$	2,063
Total cash and cash equivalents	$	2,063	$	—	$	—	$	2,063
Derivative Asset:
Interest rate swaps — fixed to floating rate	$	—	$	19	$	—	$	19
Total derivative asset	$	—	$	19	$	—	$	19