Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure

Significant actuarial assumptions used to determine net periodic pension costs

	December 31,
	2013		2012		2011
Weighted average assumed discount rate	4.25	%	4.82	%	5.52	%
Weighted average expected long-term rate of return on plan assets	8.00		8.00		8.00
Assumed long-term rate of annual compensation increases	4.50		4.50		4.50

Summary of the components of net periodic benefit cost recognized for pension plans

					Years Ended December 31,
					2013		2012		2011
					(Dollars in millions)
Net Periodic Pension Cost:
	Service cost				$	150	$	120	$	105
	Interest cost					120		110		103
	Estimated return on plan assets					(257)		(200)		(197)
	Net amortization and other					91		76		34
		Net periodic benefit cost				104		106		45
Pre-Tax Amounts Recognized in Total Comprehensive Income:
	Net actuarial loss (gain)					(535)		270		388
	Net amortization					(91)		(76)		(34)
		Net amount recognized in OCI				(626)		194		354
			Total net periodic pension costs (income) recognized in
				total comprehensive income, pre-tax	$	(522)	$	300	$	399

Significant actuarial assumptions used to determine benefit obligations

	December 31,
	2013		2012
Weighted average assumed discount rate	5.10	%	4.25	%
Assumed rate of annual compensation increases	5.00		4.50

Changes in projected benefit obligation

		Qualified Pension Plan				Nonqualified Pension Plans
		Years Ended December 31,				Years Ended December 31,
		2013		2012		2013		2012
		(Dollars in millions)
Projected benefit obligation, beginning of year		$	2,548	$	2,055	$	287	$	207
	Service cost		139		113		11		7
	Interest cost		107		100		12		10
	Actuarial (gain) loss		(294)		296		2		70
	Benefits paid		(63)		(57)		(8)		(7)
	Acquisitions		―		41		―		―
Projected benefit obligation, end of year		$	2,437	$	2,548	$	304	$	287
Accumulated benefit obligation, end of year		$	2,062	$	2,166	$	215	$	213

Changes in fair value of plan assets

		Qualified Pension Plan				Nonqualified Pension Plans
		Years Ended December 31,				Years Ended December 31,
		2013		2012		2013		2012
		(Dollars in millions)
Fair value of plan assets, beginning of year		$	2,952	$	2,478	$	—	$	—
	Actual return on plan assets		499		295		—		—
	Employer contributions		345		202		8		7
	Benefits paid		(63)		(57)		(8)		(7)
	Acquisitions		—		34		—		—
Fair value of plan assets, end of year		$	3,733	$	2,952	$	—	$	—
Funded status at end of year		$	1,296	$	404	$	(304)	$	(287)

Schedule of pre-tax amounts recognized in AOCI

		Qualified Pension Plan				Nonqualified Pension Plans
		Years Ended December 31,				Years Ended December 31,
		2013		2012		2013		2012
		(Dollars in millions)
Prior service credit (cost)		$	-	$	1	$	(2)	$	(1)
Net actuarial loss			(377)		(993)		(117)		(128)
	Net amount recognized	$	(377)	$	(992)	$	(119)	$	(129)

Schedule of prior period amounts expected to be amortized from AOCI into net periodic pension cost during next fiscal year

		Qualified		Nonqualified
		Pension Plan		Pension Plans
		(Dollars in millions)
Net actuarial gain (loss)		$	(1)	$	(11)
	Net amount expected to be amortized in 2014	$	(1)	$	(11)

Schedule of estimated future benefit payments

	Qualified		Nonqualified
	Pension Plan		Pension Plans
	(Dollars in millions)
2014	$	70	$	11
2015		78		11
2016		86		12
2017		95		13
2018		104		14
2019-2023		673		95

Schedule of fair value of pension plan assets by three level fair value hierarchy

		December 31, 2013								December 31, 2012
		Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
		(Dollars in millions)
Cash and cash-equivalents		$	74	$	74	$	—	$	—	$	89	$	89	$	—	$	—
U.S. equity securities			1,701		1,701		—		—		1,226		1,226		—		—
International equity securities			741		626		115		—		570		462		108		—
Fixed income securities			1,090		94		996		—		951		126		825		—
Alternative investments			101		—		—		101		98		—		—		98
	Total plan assets	$	3,707	$	2,495	$	1,111	$	101	$	2,934	$	1,903	$	933	$	98

Activity of plan assets with significant unobservable fair value inputs

		Years Ended December 31,
		2013		2012		2011
		(Dollars in millions)
Balance at beginning of year		$	98	$	99	$	124
	Actual return on plan assets		11		7		9
	Purchases, sales and settlements		(8)		(8)		(34)
Balance at end of year		$	101	$	98	$	99