Derivatives 2 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended									3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Mar. 31, 2011	Jun. 30, 2011 Other Current Assets [Member]	Mar. 31, 2011 Other Current Assets [Member]	Jun. 30, 2011 Other Noncurrent Assets, Net [Member]	Mar. 31, 2011 Other Noncurrent Assets, Net [Member]	Jun. 30, 2011 Accrued expenses and other current liabilities [Member]	Mar. 31, 2011 Accrued expenses and other current liabilities [Member]	Jun. 30, 2010 Interest Rate Swap [Member]	Jun. 30, 2011 Interest Rate Swap [Member]	Mar. 31, 2009 Interest Rate Swap [Member]	Jun. 30, 2011 6.125% Notes due December 2014 [Member]
Derivatives (Textuals) [Abstract]
Notional amount of fair value hedge instruments											$ 500
Notional amount of fair value hedge instruments entered into during the period										200
Fair value of interest rate derivative assets	23		15	11	11	12	4
Notional amount of cash flow hedge instruments												250
Fair value of foreign currency contracts included in "Other current assets"				10	7
Fair value of foreign currency contracts included in "Accrued expenses and other current liabilities"								8	1
Debt Instrument [Line Items]
Long-term debt, interest rate													6.125%
Derivative Instrument (Textuals) [Abstract]
Total value of senior notes subject to fair value interest rate swaps	500
Accumulated other comprehensive income loss reclassified into interest expense		2
Purchase and sale of notional value of foreign currency contracts outstanding	635
Tenure of foreign currency contracts outstanding	less than nine months
Net fair value of foreign currency contracts	$ 2		$ 6