Debt (Tables)

6 Months Ended

Jun. 30, 2011

Debt (Tables) [Abstract]

Short term debt and current portion of long-term debt

	June 30,		December 31,
	2011		2010
	(millions)
Current portion of 5-year term loan facility	$	110	$	110
6.000% loan notes due 2012		4		—
	$	114	$	110

Long-term debt

	June 30,		December 31,
	2011		2010
	(millions)
5-year term loan facility	$	246	$	301
Revolving $300 million credit facility		—		90
6.000% loan notes due 2012		—		4
5.625% senior notes due 2015		350		350
Fair value adjustment on 5.625% senior notes due 2015		16		12
12.875% senior notes due 2016		—		500
4.125% senior notes due 2016		299		—
6.200% senior notes due 2017		600		600
7.000% senior notes due 2019		300		300
5.750% senior notes due 2021		496		—
	$	2,307	$	2,157