INCOME TAXES: (Tables)

9 Months Ended

Sep. 30, 2013

INCOME TAXES:

Schedule of income tax provision and effective income tax rate

The income tax provision and the effective income tax rate for the nine months of 2013 and 2012 were as follows ($ in millions):

	2013			2012
Income tax provision	$	596.9		$	848.5
Effective income tax rate	33.2		%	38.2		%