Commercial Paper (Tables)

12 Months Ended

Dec. 31, 2012

Commercial Paper [Abstract]

Schedule of Commercial Paper

The following table shows the outstanding commercial paper balances.

	Commercial Paper
	(in millions)
December 31, 2012:
Balance	$	—
Highest aggregate month-end balance	4,660
Average borrowings	1,647
Weighted-average interest rate:
At year-end	—		%
Paid during year	.3
December 31, 2011:
Balance	$	4,026
Highest aggregate month-end balance	4,304
Average borrowings	3,815
Weighted-average interest rate:
At year-end	.3		%
Paid during year	.2
December 31, 2010:
Balance	$	3,157
Highest aggregate month-end balance	4,864
Average borrowings	3,732
Weighted-average interest rate:
At year-end	.3		%
Paid during year	.3