Debt (Short term debt) (Details) (USD $) In Millions, unless otherwise specified					12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2011 Accounts Receivable Securitization Facility [Member] days	Dec. 31, 2011 Original Terms [Member] Accounts Receivable Securitization Facility [Member]	Dec. 31, 2011 Amended Terms [Member] Accounts Receivable Securitization Facility [Member]	Dec. 31, 2011 Subsidiaries [Member] Accounts Receivable Securitization Facility [Member]		Dec. 31, 2010 Subsidiaries [Member] Accounts Receivable Securitization Facility [Member]		Dec. 31, 2011 Parent Company [Member] Convertible Subordinated Notes Four Percent [Member]	Dec. 31, 2010 Parent Company [Member] Convertible Subordinated Notes Four Percent [Member]
Short-term Debt [Line Items]
Secured Debt								$ 255	[1]	$ 221	[1]
Convertible Senior Notes												129	124
Long Term Debt And Capital Lease Obligations Current And Noncurrent	2,987	[2]	2,805	[2]
Short-term Debt, Average Outstanding Amount					230
Debt, Weighted Average Interest Rate					1.40%
Short-term Debt, Maximum Month-end Outstanding Amount					276
Short Term Debt Extension Period					364
Short Term Debt Maximum Borrowing Capacity						325	300
Debt Instrument Collateral Amount					$ 372

[1] $929 and $7 were available under our ABL facility and accounts receivable securitization facility, respectively, at December 31, 2011. The ABL facility availability is reflected net of $50 of letters of credit. At December 31, 2011, the interest rates applicable to our ABL facility and accounts receivable securitization facility were 2.4 percent and 0.9 percent, respectively.

[2] In August 1998, a subsidiary trust of Holdings (the “Trust”) issued and sold $300 of 6 1/2 percent Convertible Quarterly Income Preferred Securities (“QUIPS”) in a private offering. The Trust used the proceeds from the offering to purchase 6 1/2 percent subordinated convertible debentures due 2028 (the “Debentures”), which resulted in Holdings receiving all of the net proceeds of the offering. The QUIPS are non-voting securities, carry a liquidation value of $50 (fifty dollars) per security and are convertible into Holdings’ common stock. Total long-term debt at December 31, 2011 and 2010 excludes $55 and $124 of these Debentures, respectively, which are separately classified in our consolidated balance sheets and referred to as “subordinated convertible debentures.” The subordinated convertible debentures reflect the obligation to our subsidiary that has issued the QUIPS. This subsidiary is not consolidated in our financial statements because we are not the primary beneficiary of the Trust. See note 13 (“Subordinated Convertible Debentures”) for additional detail. S