Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2011

Long-Term Debt [Abstract]

Summary of debt

	September 30,						December 31,
	2011						2010
	(In millions, except percentage data)
				Effective						Effective
	Amount			Rate			Amount			Rate
1.500% fixed-rate notes, due 2013	$	300			1.605	%	$	300			1.605	%
2.375% fixed-rate notes, due 2015		400			2.494	%		400			2.494	%
		700						700
Unaccreted discount		(2	)					(3	)
	$	698					$	697