Fair Value (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value [Abstract]

Assets and liabilities measured at fair value on recurring basis

	Level 1		Level 2		Level 3		Total
	(In millions)
Cash and Cash Equivalents:
Prime money market funds	$	1,154	$	—	$	—	$	1,154
Total cash and cash equivalents	$	1,154	$	—	$	—	$	1,154
Derivative Asset:
Interest rate swaps — fixed to floating rate	$	—	$	30	$	—	$	30
Total derivative asset	$	—	$	30	$	—	$	30

     Assets and liabilities measured at fair value on a recurring basis at December 31, 2010 were as follows:

	Level 1		Level 2		Level 3		Total
	(In millions)
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