Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt [Abstract]

Components of Notes Payable [Table Text Block]

(millions)		2011				2010
		Principal amount	Effective interest rate			Principal amount	Effective interest rate
U.S. commercial paper	$	216	0.24	%	$	-	-	%
Bank borrowings		18				44
Total	$	234			$	44

Long-term debt schedule [Table Text Block]

(millions)			2011		2010
(a)	7.45% U.S. Dollar Debentures due 2031	$	1,090	$	1,090
(b)	4.0% U.S. Dollar Notes due 2020		992		991
(c)	4.25% U.S. Dollar Notes due 2013		772		800
(d)	4.45% U.S. Dollar Notes due 2016		763		748
(e)	5.125% U.S. Dollar Notes due 2012		760		768
(f)	1.875% U.S. Dollar Notes due 2016		499		-
(g)	4.15% U.S. Dollar Notes due 2019		499		498
(h)	3.25% U.S. Dollar Notes due 2018		409		-
(a)	6.6% U.S. Dollar Notes due 2011		-		951
	Other		14		14
			5,798		5,860
Less current maturities			(761)		(952)
Balance at year end		$	5,037	$	4,908