Fair Value Measurements (Details) (USD $) In Millions	3 Months Ended
	Sep. 30, 2011
Fair Value Measurements (Textual) [Abstract]
Maturity of auction rate securities	Dates Through 2050
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	$ 807
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents	807
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	0
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents	0
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	53
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents	0
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	53
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents	0
U.S. Government agency securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	53
U.S. Government agency securities [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents	0
U.S. Government agency securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	53
U.S. Government agency securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents	0
Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Auction-rate securities	15
Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Auction-rate securities	0
Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Auction-rate securities	0
Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Auction-rate securities	15
Foreign Exchange Contract [Member]
Liabilities:
Foreign exchange contracts	(33)
Foreign Exchange Contract [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Liabilities:
Foreign exchange contracts	0
Foreign Exchange Contract [Member] | Significant Other Observable Inputs (Level 2) [Member]
Liabilities:
Foreign exchange contracts	(33)
Foreign Exchange Contract [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities:
Foreign exchange contracts	0
Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	913
Total assets at fair value	928
Liabilities:
Total liabilities at fair value	(33)
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Total cash equivalents	807
Total assets at fair value	807
Liabilities:
Total liabilities at fair value	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total cash equivalents	106
Total assets at fair value	106
Liabilities:
Total liabilities at fair value	(33)
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total cash equivalents	0
Total assets at fair value	15
Liabilities:
Total liabilities at fair value	$ 0