Available-For-Sale Securities (Tables)

9 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale securities

	September 30, 2013						December 31, 2012
(Millions of dollars)	Cost Basis		Unrealized Pretax Net Gains (Losses)		Fair Value		Cost Basis		Unrealized Pretax Net Gains (Losses)			Fair Value
Government debt
U.S. treasury bonds	$	11	$	—	$	11	$	10	$	—		$	10
Other U.S. and non-U.S. government bonds	125		1		126		144		2			146
Corporate bonds
Corporate bonds	648		24		672		626		38			664
Asset-backed securities	75		—		75		96		—			96
Mortgage-backed debt securities
U.S. governmental agency	336		1		337		291		8			299
Residential	21		—		21		26		(1		)	25
Commercial	87		6		93		117		10			127
Equity securities
Large capitalization value	158		73		231		147		38			185
Smaller company growth	22		23		45		22		12			34
Total	$	1,483	$	128	$	1,611	$	1,479	$	107		$	1,586

Investments in an unrealized loss position that are not other-than-temporarily impaired:

Investments in an unrealized loss position that are not other-than-temporarily impaired:
	September 30, 2013
	Less than 12 months1				12 months or more1				Total
(Millions of dollars)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Corporate bonds
Corporate bonds	$	174	$	2	$	—	$	—	$	174	$	2
Asset-backed securities	4		—		20		2		24		2
Mortgage-backed debt securities
U.S. governmental agency	145		4		56		1		201		5
Equity securities
Large capitalization value	15		1		2		—		17		1
Total	$	338	$	7	$	78	$	3	$	416	$	10

	December 31, 2012
	Less than 12 months1				12 months or more1				Total
(Millions of dollars)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Corporate bonds
Asset-backed securities	$	—	$	—	$	20	$	3	$	20	$	3
Mortgage-backed debt securities
U.S. governmental agency	84		1		15		—		99		1
Residential	—		—		14		1		14		1
Equity securities
Large capitalization value	25		2		10		1		35		3
Total	$	109	$	3	$	59	$	5	$	168	$	8

¹  Indicates length of time that individual securities have been in a continuous unrealized loss position.

Cost basis and fair value of the available-for-sale debt securities by contractual maturity

	September 30, 2013
(Millions of dollars)	Cost Basis		Fair Value
Due in one year or less	$	211	$	214
Due after one year through five years	589		611
Due after five years through ten years	28		29
Due after ten years	31		30
U.S. governmental agency mortgage-backed securities	336		337
Residential mortgage-backed securities	21		21
Commercial mortgage-backed securities	87		93
Total debt securities – available-for-sale	$	1,303	$	1,335

Schedule of proceeds and gross gain and losses from the sale of available-for-sale securities

Sales of Securities:
	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions of dollars)	2013		2012		2013		2012
Proceeds from the sale of available-for-sale securities	$	90	$	66	$	297	$	243
Gross gains from the sale of available-for-sale securities	$	2	$	1	$	4	$	4
Gross losses from the sale of available-for-sale securities	$	1	$	—	$	2	$	—