Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		28 Months Ended
	Mar. 31, 2012	May 31, 2011	Mar. 31, 2010	Dec. 31, 2011	Nov. 19, 2007
Loss Contingencies (Textuals) [Abstract]
Accrual for legal matters that are probable and estimable	$ 318			$ 299
Settlement for lost profits related to the Jang patent litigation		18.5
Settlement for royalties related to Jang patent		1
Total damages awarded to BSC related to Jang patent	41
Maximum payment pursuant to MDL settlement					240
Payment Made In Multi-District Litigation Settlement			$ 234