Employee Benefit Plans Level 3 (Tables)

12 Months Ended

Dec. 31, 2015

Defined Benefit Plan, Assumptions Used in Calculations [Abstract]

Weighted average assumptions used in calculating net periodic benefit cost other postretirement pension plans

	Pension Benefits				Other Postretirement Benefits
	For the years ended December 31,
	2015		2014		2015		2014
Discount rate	4.25	%	4.00	%	4.00	%	3.75	%

Weighted average assumptions used in calculating the net periodic benefit cost for the company pension plans

	For the years ended December 31,
	2015		2014		2013
Discount rate	4.00	%	4.75	%	4.00	%
Expected long-term rate of return on plan assets	6.90	%	7.10	%	7.10	%
Rate of increase in compensation levels	—	%	—	%	3.75	%

Weighted average assumptions used in calculating the net periodic benefit cost for the company other postretirement plans

	For the years ended December 31,
	2015		2014		2013
Discount rate	3.75	%	4.25	%	3.50	%
Expected long-term rate of return on plan assets	6.90	%	7.10	%	7.10	%

Assumed health care cost trend rates

	For the years ended December 31,
	2015		2014		2013
Pre-65 health care cost trend rate	7.30	%	7.70	%	8.05	%
Post-65 health care cost trend rate	5.50	%	5.60	%	5.70	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	5.00	%	5.00	%	5.00	%
Year that the rate reaches the ultimate trend rate	2023		2023		2021

Defined Benefit Plan, Funded Status of Plan [Abstract]

Amounts recognized in other comprehensive income (loss)

	Pension Benefits						Other Postretirement Benefits
	For the years ended December 31,
	2015			2014			2015			2014
Amortization of actuarial loss	$	60		$	45		$	5		$	5
Settlement loss	—			128			—			—
Amortization of prior service credit	—			—			(7		)	(7		)
Net loss arising during the year	(185		)	(622		)	(3		)	(51		)
Total	$	(125	)	$	(449	)	$	(5	)	$	(53	)

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Benefits									Other Postretirement Benefits
	For the years ended December 31,
	2015			2014			2013			2015			2014			2013
Service cost	$	2		$	2		$	1		$	—		$	—		$	—
Interest cost	235			258			238			12			14			11
Expected return on plan assets	(311		)	(325		)	(315		)	(12		)	(14		)	(14		)
Amortization of prior service credit	—			—			—			(7		)	(7		)	(7		)
Amortization of actuarial loss	60			45			59			5			5			2
Settlements	—			128			—			—			—			—
Net periodic benefit cost (benefit)	$	(14	)	$	108		$	(17	)	$	(2	)	$	(2	)	$	(8	)

Change in plan assets

	Pension Benefits						Other Postretirement Benefits
	For the years ended December 31,
Change in Plan Assets	2015			2014			2015			2014
Fair value of plan assets — beginning of year	$	4,707		$	4,630		$	196		$	213
Actual return on plan assets	(72		)	565			2			16
Employer contributions	101			101			—			—
Benefits paid [1]	(282		)	(245		)	(36		)	(33		)
Expenses paid	(21		)	(24		)	—			—
Settlements	—			(319		)	—			—
Foreign exchange adjustment	(3		)	(1		)	—			—
Fair value of plan assets — end of year	$	4,430		$	4,707		$	162		$	196
Funded status — end of year	$	(1,304	)	$	(1,318	)	$	(139	)	$	(142	)

Change in benefit obligation

	Pension Benefits						Other Postretirement Benefits
	For the years ended December 31,
Change in Benefit Obligation	2015			2014			2015			2014
Benefit obligation — beginning of year	$	6,025		$	5,516		$	338		$	312
Service cost	2			2			—			—
Interest cost	235			258			12			14
Plan participants’ contributions	—			—			25			26
Actuarial loss (gain)	18			(8		)	—			38
Settlements	—			(319		)	—			—
Changes in assumptions	(236		)	846			(8		)	16
Benefits paid	(307		)	(268		)	(68		)	(70		)
Retiree drug subsidy	—			—			2			2
Foreign exchange adjustment	(3		)	(2		)	—			—
Benefit obligation — end of year	$	5,734		$	6,025		$	301		$	338

Amounts recognized in consolidated balance sheet

	Pension Benefits				Other Postretirement Benefits
	As of December 31,
	2015		2014		2015		2014
Other liabilities	$	1,304	$	1,318	$	139	$	142

Defined benefit pension plans with accumulated benefit obligation in excess of plan assets

	As of December 31,
	2015		2014
Projected benefit obligation	$	5,734	$	6,025
Accumulated benefit obligation	5,732		6,024
Fair value of plan assets	4,430		4,707

Amounts in accumulated other comprehensive income (loss) on a before tax basis that have not yet been recognized as components of net periodic benefit cost

	Pension Benefits						Other Postretirement Benefits
	As of December 31,
	2015			2014			2015			2014
Net loss	$	(2,553	)	$	(2,428	)	$	(123	)	$	(124	)
Prior service credit	—			—			91			97
Total	$	(2,553	)	$	(2,428	)	$	(32	)	$	(27	)

Defined Benefit Plan, Assets, Target Allocations [Abstract]

Fair value of other postretirement plan assets

	Other Postretirement Plan Assets at Fair Value as of December 31, 2014
Asset Category	Level 1		Level 2		Level 3		Total
Short-term investments	$	8	$	5	$	—	$	13
Fixed Income Securities:
Corporate	—		41		3		44
RMBS	—		22		3		25
U.S. Treasuries	1		44		—		45
Foreign government	—		2		—		2
CMBS	—		15		—		15
Other fixed income	—		7		—		7
Equity Securities:
Large-cap	49		—		—		49
Total other postretirement plan assets at fair value [1]	$	58	$	136	$	6	$	200

[1] Excludes approximately $5 of investment payables net of investment receivables that are not carried at fair value and approximately $1 of interest receivable carried at fair value.

	Other Postretirement Plan Assets at Fair Value as of December 31, 2015
Asset Category	Level 1		Level 2		Level 3		Total
Short-term investments	$	—	$	16	$	—	$	16
Fixed Income Securities:
Corporate	—		36		2		38
RMBS	—		27		3		30
U.S. Treasuries	—		23		—		23
Foreign government	—		2		—		2
CMBS	—		14		—		14
Other fixed income	—		7		—		7
Equity Securities:
Large-cap	41		—		—		41
Total other postretirement plan assets at fair value [1]	$	41	$	125	$	5	$	171

Target allocation by asset category

	Target Asset Allocation
	Pension Plans				Other Postretirement Plans
	(minimum)		(maximum)		(minimum)		(maximum)
Equity securities	5	%	20	%	15	%	45	%
Fixed income securities	50	%	70	%	55	%	85	%
Alternative assets	10	%	45	%	—	%	—	%

Weighted average asset allocation

	Pension Plans				Other Postretirement Plans
	Percentage of Assets				Percentage of Assets
	at Fair Value				at Fair Value
	As of December 31,
	2015		2014		2015		2014
Equity securities	20	%	21	%	25	%	25	%
Fixed income securities	66	%	62	%	75	%	75	%
Alternative assets	14	%	17	%	—	%	—	%
Total	100	%	100	%	100	%	100	%

Pension plan asset fair value measurements using significant unobservable inputs

Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Assets	Corporate			RMBS			Foreign government			Mortgage loans		Other [1]			Hedge funds			Private Market Alternatives		Totals
Fair Value as of January 1, 2015	$	34		$	28		$	5		$	—	$	9		$	181		$	—	$	257
Realized gains (losses), net	—			—			—			—		—			—			—		—
Changes in unrealized gains (losses), net	(2		)	—			(1		)	—		(1		)	—			3		(1		)
Purchases	12			14			1			54		3			2			17		103
Settlements	—			(14		)	—			—		(3		)	—			—		(17		)
Sales	(11		)	(2		)	—			—		(1		)	(24		)	—		(38		)
Transfers into Level 3	—			4			—			—		1			—			—		5
Transfers out of Level 3	(14		)	(6		)	—			—		(3		)	(105		)	—		(128		)
Fair Value as of December 31, 2015	$	19		$	24		$	5		$	54	$	5		$	54		$	20	$	181

Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Assets	Corporate			RMBS			Foreign government			Other fixed income			Hedge funds			Totals
Fair Value as of January 1, 2014	$	12		$	2		$	4		$	12		$	361		$	391
Realized gains (losses), net	—			—			—			—			4			4
Changes in unrealized gains (losses), net	—			7			1			(5		)	4			7
Purchases	12			3			2			6			219			242
Sales	(5		)	(1		)	(2		)	(2		)	(183		)	(193		)
Transfers into Level 3	20			17			—			7			—			44
Transfers out of Level 3	(5		)	—			—			(9		)	(224		)	(238		)
Fair Value as of December 31, 2014	$	34		$	28		$	5		$	9		$	181		$	257

Fair values of company pension plan assets

	Pension Plan Assets at Fair Value as of December 31, 2015
Asset Category	Level 1		Level 2		Level 3		Total
Short-term investments:	$	7	$	274	$	—	$	281
Fixed Income Securities:
Corporate	—		922		19		941
RMBS	—		242		24		266
U.S. Treasuries	16		1,029		3		1,048
Foreign government	—		49		5		54
CMBS	—		183		—		183
Other fixed income [1]	—		105		1		106
Mortgage Loans	—		—		54		54
Equity Securities:
Large-cap domestic	500		11		1		512
International	298		87		—		385
Other investments:
Hedge funds	—		566		54		620
Private Market Alternatives	—		—		20		20
Total pension plan assets at fair value [2]	$	821	$	3,468	$	181	$	4,470

[1] Includes ABS, municipal bonds, and foreign bonds.

[2] Excludes approximately $67 of investment payables net of investment receivables that are excluded from this disclosure requirement because they are trade receivables in the ordinary course of business where the carrying amount approximates fair value. Also excludes approximately $27 of interest receivable.

	Pension Plan Assets at Fair Value as of December 31, 2014
Asset Category	Level 1		Level 2		Level 3		Total
Short-term investments:	$	56	$	252	$	—	$	308
Fixed Income Securities:
Corporate	—		919		34		953
RMBS	—		181		28		209
U.S. Treasuries	24		1,198		5		1,227
Foreign government	—		65		5		70
CMBS	—		156		—		156
Other fixed income [1]	—		93		4		97
Equity Securities:
Large-cap domestic	526		—		—		526
Mid-cap domestic	—		—		—		—
Small-cap domestic	—		—		—		—
International	435		3		—		438
Other investments:
Hedge funds	—		562		181		743
Total pension plan assets at fair value [2]	$	1,041	$	3,429	$	257	$	4,727

[1] Includes ABS and municipal bonds.

[2] Excludes approximately $42 of investment payables net of investment receivables that are excluded from this disclosure requirement because they are trade receivables in the ordinary course of business where the carrying amount approximates fair value. Also excludes approximately $22 of interest receivable.

Defined Benefit Plan Prior Contributions [Table Text Block]

Employer Contributions	Pension Benefits		Other Postretirement Benefits
2015	$	101	$	—
2014	$	101	$	—

Defined Benefit Plan, Expected Future Benefit Payments, Rolling Maturity [Abstract]

Schedule of Expected Benefit Payments [Table Text Block]

	Pension Benefits		Other Postretirement Benefits
2016	$	327	$	40
2017	332		38
2018	338		35
2019	345		32
2020	346		29
2021 - 2025	1,738		113
Total	$	3,426	$	287

Prescription Drug Subsidy Receipts [Table Text Block]

2016	$	3
2017	3
2018	3
2019	3
2020	3
2021 - 2025	18
Total	$	33