Supplemental Disclosures of Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2011

Supplemental Disclosures Of Cash Flow Information (Tables) [Abstract]

Supplemental disclosures regarding cash flow information and non-cash flow investing and financing activities

	Six months ended
	June 30,
	2011			2010
	(millions)
Supplemental disclosures of cash flow information:
Cash (receipts) payments for income taxes, net of cash received	$	(24	)	$	56
Cash payments for interest		62			82
Supplemental disclosures of non-cash flow investing and financing activities:
Write-off of unamortized debt issuance costs	$	(13	)	$	—
Acquisitions:
Fair value of assets acquired	$	2		$	1
Less: Liabilities assumed		—			—
Net assets acquired, net of cash acquired	$	2		$	1