Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt [Abstract]

Carrying Value Of Long-Term Debt Outstanding

	2011		2010
	(in millions)
Long-term debt:
Senior notes:
$500 million, 6.45% due June 1, 2016	$	530	$	535
$500 million, 7.20% due June 15, 2018		507		508
$300 million, 6.30% due August 1, 2018		319		322
$250 million, 8.15% due June 15, 2038		267		267
Total senior notes		1,623		1,632
Other long-term borrowings		36		37
Total long-term debt	$	1,659	$	1,669