Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Funded Status of Pension and Other Postretirement Benefit Plans

The funded status of the pension and other postretirement benefit plans at December 31, 2013 and 2012 was as follows:

	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
	(in millions)
Benefit obligation, beginning of year	$	2,894		$	2,494		$	470		$	454
Service cost		95			88			13			12
Interest cost		125			124			19			20
Actuarial loss (gain)		(261	)		256			(97	)		(4	)
Benefits paid		(75	)		(74	)		(11	)		(12	)
Foreign currency translation effect		(1	)		6			—			—
Benefit obligation, end of year		2,777			2,894			394			470
Plan assets at fair value		2,717			2,305			130			96
Funded status at end of year, included in other liabilities	$	60		$	589		$	264		$	374

Net Actuarial Loss (Gain) and Prior Service Cost Included in Accumulated Other Comprehensive Income

Net actuarial loss (gain) and prior service cost included in accumulated other comprehensive income that were not yet recognized as components of net benefit costs at December 31, 2013 and 2012 were as follows:

	Pension Benefits				Other Postretirement Benefits
	2013		2012		2013			2012
	(in millions)
Net actuarial loss (gain)	$	396	$	989	$	(13	)	$	108
Prior service cost		16		18		1			—
	$	412	$	1,007	$	(12	)	$	108

Weighted Average Assumptions Used to Determine Benefit Obligations

The weighted average assumptions used to determine the benefit obligations were as follows:

	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
Discount rate		5.2	%		4.4	%		5.2	%		4.4	%
Rate of compensation increase		4.5			4.5			—			—

Components of Net Pension and Other Postretirement Benefit Costs Reflected in Net Income

The components of net pension and other postretirement benefit costs reflected in net income and other changes in plan assets for the years ended December 31, 2013, 2012 and 2011 were as follows:

	Pension Benefits									Other Postretirement Benefits
	2013			2012			2011			2013			2012			2011
	(in millions)
Costs reflected in net income
Service cost	$	95		$	88		$	79		$	13		$	12		$	11
Interest cost		125			124			120			19			20			22
Expected return on plan assets		(165	)		(155	)		(140	)		(7	)		(6	)		(5	)
Amortization of net actuarial loss and prior service cost and other		90			80			68			3			3			3
	$	145		$	137		$	127		$	28		$	29		$	31

Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income

The components of net pension and other postretirement benefit obligations recognized in other comprehensive income for the years ended December 31, 2013, 2012 and 2011 were as follows:

	Pension Benefits									Other Postretirement Benefits
	2013			2012			2011			2013			2012			2011
	(in millions)
Costs reflected in net income
Service cost	$	95		$	88		$	79		$	13		$	12		$	11
Interest cost		125			124			120			19			20			22
Expected return on plan assets		(165	)		(155	)		(140	)		(7	)		(6	)		(5	)
Amortization of net actuarial loss and prior service cost and other		90			80			68			3			3			3
	$	145		$	137		$	127		$	28		$	29		$	31
Changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial loss (gain)	$	(505	)	$	139		$	355		$	(117	)	$	(11	)	$	45
Amortization of net actuarial loss and prior service cost and other		(90	)		(80	)		(68	)		(3	)		(3	)		(3	)
	$	(595	)	$	59		$	287		$	(120	)	$	(14	)	$	42

Weighted Average Assumptions Used to Determine Net Pension and Other Postretirement Benefit Costs

The weighted average assumptions used to determine net pension and other postretirement benefit costs were as follows:

	Pension Benefits						Other Postretirement Benefits
	2013		2012		2011		2013		2012		2011
Discount rate		4.4%		5.0%		5.75%		4.4%		5.0%		5.75%
Rate of compensation increase		4.5		4.5		4.5		—		—		—
Expected long term rate of return on plan assets		7.5		7.75		7.75		7.5		7.75		7.75

Weighted Average Health Care Cost Trend Rate Assumptions

The weighted average health care cost trend rate assumptions used to measure the expected cost of medical benefits were as follows:

	December 31
	2013			2012
Health care cost trend rate for next year		7.6	%		7.9	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.5			4.5
Year that the rate reaches the ultimate trend rate		2028			2028

Fair Values of Pension Plan Assets

The fair values of the pension plan assets were as follows:

	December 31
	2013		2012
	(in millions)
Short term investments	$	37	$	33
Fixed maturities
U.S. government and government agency and authority obligations		224		239
Corporate bonds		371		321
Foreign government and government agency obligations		104		80
Mortgage-backed securities		217		174
Total fixed maturities		916		814
Equity securities		1,718		1,404
Other assets		46		54
	$	2,717	$	2,305

Estimated Benefits Expected to be Paid

The estimated benefits expected to be paid in each of the next five years and in the aggregate for the following five years are as follows:

Years Ending December 31	Pension Benefits		Other Postretirement Benefits
	(in millions)
2014	$	99	$	12
2015		104		13
2016		114		15
2017		149		16
2018		130		18
2019-2023		803		114