Pension Plans, Retirement Benefits and Savings Plans (tables)

12 Months Ended

Dec. 31, 2012

Pension Plans, Retirement Benefits and Savings Plans disclosure

Summary of the funded status, obligations and amounts recognized in the consolidated balance sheet for the Company's benefit plans [Table Text Block]

	Qualified Domestic Pension Plan						Nonqualified and Foreign Pension Plans						Total
(at and for the year ended December 31, in millions)	2012			2011			2012			2011			2012			2011
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	2,706		$	2,399		$	183		$	173		$	2,889		$	2,572
Benefits earned		107			93			6			5			113			98
Interest cost on benefit obligation		129			125			9			10			138			135
Actuarial loss		225			207			17			7			242			214
Benefits paid		(112	)		(118	)		(13	)		(12	)		(125	)		(130	)
Foreign currency exchange rate change		—			—			4			—			4			—
Benefit obligation at end of year	$	3,055		$	2,706		$	206		$	183		$	3,261		$	2,889
Change in plan assets:
Fair value of plan assets at beginning of year	$	2,414		$	2,342		$	86		$	83		$	2,500		$	2,425
Actual return on plan assets		242			5			10			3			252			8
Company contributions		217			185			11			12			228			197
Benefits paid		(112	)		(118	)		(13	)		(12	)		(125	)		(130	)
Foreign currency exchange rate change		—			—			4			—			4			—
Fair value of plan assets at end of year		2,761			2,414			98			86			2,859			2,500
Funded status of plan at end of year	$	(294	)	$	(292	)	$	(108	)	$	(97	)	$	(402	)	$	(389	)
Amounts recognized in the statement of financial position consist of:
Accrued under-funded benefit plan liabilities	$	(294	)	$	(292	)	$	(108	)	$	(97	)	$	(402	)	$	(389	)
Amounts recognized in accumulated other comprehensive income consist of:
Prior service benefit	$	—		$	—		$	—		$	—		$	—		$	—
Net actuarial loss		1,300			1,220			63			55			1,363			1,275
Total	$	1,300		$	1,220		$	63		$	55		$	1,363		$	1,275

	Postretirement Benefit Plans
(at and for the year ended December 31, in millions)	2012			2011
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	246		$	254
Benefits earned		—			—
Plan amendments		(31	)		—
Interest cost on benefit obligation		11			13
Actuarial loss (gain)		12			(4	)
Benefits paid		(16	)		(17	)
Benefit obligation at end of year	$	222		$	246
Change in plan assets:
Fair value of plan assets at beginning of year	$	19		$	20
Actual return on plan assets		1			1
Company contributions		14			15
Benefits paid		(16	)		(17	)
Fair value of plan assets at end of year		18			19
Funded status of plan at end of year	$	(204	)	$	(227	)
Amounts recognized in the statement of financial position consist of:
Accrued under-funded benefit plan liability	$	(204	)	$	(227	)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial gain	$	(50	)	$	(31	)

Summary of the components of net periodic benefit cost and other amounts recognized in other comprehensive income related to the benefit plans [Table Text Block]

	Pension Plans									Postretirement Benefit Plans
(in millions)	2012			2011			2010			2012			2011			2010
Net Periodic Benefit Cost:
Service cost	$	113		$	98		$	96		$	—		$	—		$	1
Interest cost on benefit obligation		138			135			128			12			13			14
Expected return on plan assets		(187	)		(182	)		(185	)		(1	)		(1	)		(1	)
Amortization of unrecognized:
Prior service benefit		—			—			(3	)		—			—			—
Net actuarial loss (gain)		89			76			60			(1	)		—			—
Net benefit expense	$	153		$	127		$	96		$	10		$	12		$	14
Other Changes in Benefit Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income:
Prior service benefit	$	—		$	—		$	—		$	—		$	—		$	—
Net actuarial loss (gain)		176			388			27			11			(5	)		(8	)
Plan amendments		—			—			—			(31	)		—			—
Amortization of prior service benefit		—			—			3			—			—			—
Amortization of net actuarial gain (loss)		(89	)		(76	)		(60	)		1			—			—
Total other changes recognized in other comprehensive income		87			312			(30	)		(19	)		(5	)		(8	)
Total other changes recognized in net benefit expense and other comprehensive income	$	240		$	439		$	66		$	(9	)	$	7		$	6

Benefit obligations assumptions, net periodic benefit cost assumptions and health care cost trend rate sensitivity [Table Text Block]

(at and for the year ended December 31,)	2012			2011
Assumptions used to determine benefit obligations
Discount rate		4.15	%		4.90	%
Future compensation increase rate		4.00	%		4.00	%
Assumptions used to determine net periodic benefit cost
Discount rate		4.90	%		5.37	%
Expected long-term rate of return on pension plans' assets		7.50	%		8.00	%
Expected long-term rate of return on postretirement benefit plans' assets		5.00	%		5.00	%
Assumed health care cost trend rates
Following year		7.50	%		8.00	%
Rate to which the cost trend rate is assumed to decline (ultimate trend rate)		5.00	%		5.00	%
Year that the rate reaches the ultimate trend rate		2018			2018

Level within the fair value hierarchy at which the financial assets of the Company's pension plans are measured [Table Text Block]

(at December 31, 2012, in millions)	Total		Level 1		Level 2		Level 3
Invested assets:
Fixed maturities
Obligations of states, municipalities and political subdivisions	$	7	$	—	$	7	$	—
Debt securities issued by foreign governments		14		—		14		—
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities		9		—		9		—
All other corporate bonds		383		—		383		—
Total fixed maturities		413		—		413		—
Mutual funds
Equity mutual funds		1,143		1,143		—		—
Bond mutual funds		406		406		—		—
Total mutual funds		1,549		1,549		—		—
Equity securities		450		450		—		—
Other investments(1)		6		—		—		6
Cash and short-term securities
U.S. Treasury securities		132		132		—		—
Money market mutual funds		22		22		—		—
Other		287		17		270		—
Total cash and short-term securities		441		171		270		—
Total	$	2,859	$	2,170	$	683	$	6

(1)

The fair value estimates of the two private equity funds comprising these investments are determined by an external fund manager based on recent filings, operating results, balance sheet stability, growth and other business and market sector fundamentals. Due to the significant unobservable inputs in these valuations, the total fair value estimates are disclosed in Level 3.

(at December 31, 2011, in millions)	Total		Level 1		Level 2		Level 3
Invested assets:
Fixed maturities
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	15	$	15	$	—	$	—
Debt securities issued by foreign governments		13		—		13		—
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities		14		—		12		2
All other corporate bonds		214		—		214		—
Total fixed maturities		256		15		239		2
Mutual funds
Equity mutual funds		932		932		—		—
Bond mutual funds		443		443		—		—
Total mutual funds		1,375		1,375		—		—
Equity securities		352		352		—		—
Other investments(1)		16		—		—		16
Cash and short-term securities
U.S. Treasury securities		141		141		—		—
Money market mutual funds		50		50		—		—
Other		310		12		298		—
Total cash and short-term securities		501		203		298		—
Total	$	2,500	$	1,945	$	537	$	18

(1)

The fair value estimates of the hedge fund and two private equity funds comprising these investments are determined by an external fund manager based on recent filings, operating results, balance sheet stability, growth and other business and market sector fundamentals. Due to the significant unobservable inputs in these valuations, the total fair value estimates are disclosed in Level 3.

Changes in the Level 3 fair value category for the pension plans [Table Text Block]

	Other Investments
(at and for the year ended December 31, in millions)	2012			2011
Balance at beginning of year	$	18		$	18
Actual return on plan assets:
Relating to assets still held		2			(1	)
Relating to assets sold during the year		—			—
Purchases, sales, settlements and maturities:
Purchases		—			2
Sales		(12	)		(1	)
Settlements/maturities		—			—
Gross transfers into Level 3		—			—
Gross transfers out of Level 3		(2	)		—
Balance at end of year	$	6		$	18

Estimated future benefit payments [Table Text Block]

	Benefits Expected to be Paid
(in millions)	Pension Plans		Postretirement Benefit Plans
2013	$	152	$	15
2014		165		15
2015		176		15
2016		187		15
2017		198		15
2018 through 2022		1,118		70