Exhibit 12

Ratio of Earnings to Fixed Charges

(in millions)	Twelve Months Ended December 31,
	2002		2003		2004
Earnings:
Earnings before income taxes and accounting changes	$	5,009	$	4,370	$	4,922
Add: Interest expense		173		121		149
Add: One-third of rental expense (a)		228		226		231
Total earnings	$	5,410	$	4,717	$	5,302
Fixed Charges:
Interest expense	$	173	$	121	$	149
Interest capitalized		25		25		25
One-third of rental expense (a)		228		226		231
Total fixed charges	$	426	$	372	$	405
Ratio of Earnings to Fixed Charges		12.7		12.7		13.1

(a) Considered to be representative of interest factor in rental expense.