Taxes on Income (Details Textuals) (USD $)	3 Months Ended			9 Months Ended		1 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2004 Internal Revenue Service [Member]	Sep. 30, 2011 Canada Revenue Agency [Member]
Operating Loss Carryforwards [Line Items]
Additional tax being proposed by Canada Revenue Agency							$ 330,000,000
Interest on additional tax being proposed by Canada Revenue Agency							370,000,000
Refund claim for tax payments made to IRS						194,000,000
Refund claim for interest paid to IRS						279,000,000
Taxes on Income (Textuals) [Abstract]
Effective tax rate	26.70%		25.30%	15.70%	37.10%
Net reduction of deferred tax liabilities on intangibles established in purchase accounting due to tax rate changes			380,000,000	230,000,000	380,000,000
Litigation losses			950,000,000	500,000,000	950,000,000
Statutory tax rate					35.00%
Tax provision charge for U.S. health care reform					147,000,000
Reasonably possible amount that unrecognized tax benefits could decline up to	1,300,000,000			1,300,000,000
Net payments made to taxing authority for settlement of income tax examination				465,000,000
Income tax provision benefit		$ 700,000,000