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Employee Benefit Plans Level 3 (Tables)
 12 Months Ended
Dec. 31, 2016
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,
 
2016
2015
2016
2015
Discount rate
4.22
%
4.25
%
3.97
%
4.00
%
Weighted average assumptions used in calculating the net periodic benefit cost for the company pension plans
 
For the years ended December 31,
 
2016
2015
2014
Discount rate
4.25
%
4.00
%
4.75
%
Expected long-term rate of return on plan assets
6.70
%
6.90
%
7.10
%
Weighted average assumptions used in calculating the net periodic benefit cost for the company other postretirement plans
 
For the years ended December 31,
 
2016
2015
2014
Discount rate
4.00
%
3.75
%
4.25
%
Expected long-term rate of return on plan assets
6.60
%
6.90
%
7.10
%
Assumed health care cost trend rates
 
For the years ended December 31,
 
2016
2015
2014
Pre-65 health care cost trend rate
6.90
%
7.30
%
7.70
%
Post-65 health care cost trend rate
N/A

5.50
%
5.60
%
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
2024

2023

2023
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,
 
2016
2015
2016
2015
Amortization of actuarial loss
$
56

$
60

$
5

$
5

Amortization of prior service credit
—

—

(6
)
(7
)
Net loss arising during the year
(66
)
(185
)
(4
)
(3
)
Total
$
(10
)
$
(125
)
$
(5
)
$
(5
)
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
 
Pension Benefits
Other Postretirement Benefits
 
For the years ended December 31,
 
2016
2015
2014
2016
2015
2014
Service cost
$
2

$
2

$
2

$
—

$
—

$
—

Interest cost
237

235

258

11

12

14

Expected return on plan assets
(311
)
(311
)
(325
)
(10
)
(12
)
(14
)
Amortization of prior service credit
—

—

—

(6
)
(7
)
(7
)
Amortization of actuarial loss
56

60

45

5

5

5

Settlements
—

—

128

—

—

—

Net periodic (benefit) cost
$
(16
)
$
(14
)
$
108

$
—

$
(2
)
$
(2
)
Change in plan assets
 
Pension Benefits
Other Postretirement Benefits
 
For the years ended December 31,
 
2016
2015
2016
2015
Fair value of plan assets — beginning of year
$
4,430

$
4,707

$
162

$
196

Actual return on plan assets
250

(72
)
9

2

Employer contributions
301

101

—

—

Benefits paid [1]
(279
)
(282
)
(33
)
(36
)
Expenses paid
(24
)
(21
)
—

—

Foreign exchange adjustment
—

(3
)
—

—

Fair value of plan assets — end of year
$
4,678

$
4,430

$
138

$
162

Funded status — end of year
$
(972
)
$
(1,304
)
$
(134
)
$
(139
)
Change in benefit obligation
 
Pension Benefits
Other Postretirement Benefits
 
For the years ended December 31,
 
2016
2015
2016
2015
Benefit obligation — beginning of year
$
5,734

$
6,025

$
301

$
338

Service cost
2

2

—

—

Interest cost
237

235

11

12

Plan participants’ contributions
—

—

25

25

Actuarial loss (gain)
9

18

4

—

Plan Amendment
—

—

(1
)
—

Changes in assumptions
(30
)
(236
)
—

(8
)
Benefits and expenses paid
(303
)
(307
)
(68
)
(68
)
Retiree drug subsidy
—

—

—

2

Foreign exchange adjustment
1

(3
)
—

—

Benefit obligation — end of year
$
5,650

$
5,734

$
272

$
301
Amounts recognized in consolidated balance sheet
 
Pension Benefits
Other Postretirement Benefits
 
As of December 31,
 
2016
2015
2016
2015
Other liabilities
$
972

$
1,304

$
134

$
139
Defined benefit pension plans with accumulated benefit obligation in excess of plan assets
 
As of December 31,
 
2016
2015
Projected benefit obligation
$
5,650

$
5,734

Accumulated benefit obligation
5,650

5,732

Fair value of plan assets
4,678

4,430
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,
 
2016
2015
2016
2015
Net loss
$
(2,563
)
$
(2,553
)
$
(122
)
$
(123
)
Prior service credit
—

—

85

91

Total
$
(2,563
)
$
(2,553
)
$
(37
)
$
(32
)
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, 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

[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, 2016
Asset Category
Level 1
Level 2
Level 3
Total
Short-term investments
$
4

$
—

$
—

$
4

Fixed Income Securities:
 
 
 
 
Corporate
—

35

1

36

RMBS
—

24

1

25

U.S. Treasuries
5

14

—

19

Foreign government
—

2

—

2

CMBS
—

9

—

9

Other fixed income
—

4

1

5

Equity Securities:
 
 
 
 
Large-cap
37

—

—

37

Total other postretirement plan assets at fair value [1]
$
46

$
88

$
3

$
137
Target allocation by asset category
 
Pension Plans
Other Postretirement Plans
 
minimum
maximum
minimum
maximum
Equity securities
10
%
30
%
15
%
45
%
Fixed income securities
50
%
70
%
55
%
85
%
Alternative assets
—
%
40
%
—
%
—
%
Weighted average asset allocation
 
Pension Plans
Other Postretirement Plans
 
As of December 31,
 
2016
2015
2016
2015
Equity securities
24
%
23
%
27
%
25
%
Fixed income securities
76
%
77
%
73
%
75
%
Alternative assets
—
%
—
%
—
%
—
%
Total
100
%
100
%
100
%
100
%
Pension plan asset fair value measurements using significant unobservable inputs
2016 Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Assets
Corporate
RMBS
Foreign government
Mortgage loans
Other [1]
Totals
Fair Value as of January 1, 2016
$
19

$
24

$
5

$
54

$
5

$
107

Realized gains (losses), net
—

—

—

—

1

1

Changes in unrealized gains (losses), net
—

—

—

(3
)
—

(3
)
Purchases
15

—

—

70

24

109

Settlements
—

(14
)
—

—

(1
)
(15
)
Sales
(10
)
—

(4
)
—

(9
)
(23
)
Transfers into Level 3
—

2

—

—

3

5

Transfers out of Level 3
(11
)
(2
)
—

—

(1
)
(14
)
Fair Value as of December 31, 2016
$
13

$
10

$
1

$
121

$
22

$
167

2015 Pension Plan Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Assets
Corporate
RMBS
Foreign government
Mortgage loans
Other
Totals
Fair Value as of January 1, 2015
$
34

$
28

$
5

$
—

$
9

$
76

Realized gains (losses), net
—

—

—

—

—

—

Changes in unrealized gains (losses), net
(2
)
—

(1
)
—

(1
)
(4
)
Purchases
12

14

1

54

3

84

Settlements
—

(14
)
—

—

(3
)
(17
)
Sales
(11
)
(2
)
—

—

(1
)
(14
)
Transfers into Level 3
—

4

—

—

1

5

Transfers out of Level 3
(14
)
(6
)
—

—

(3
)
(23
)
Fair Value as of December 31, 2015
$
19

$
24

$
5

$
54

$
5

$
107
Fair values of company pension plan assets
Asset Category
Level 1
Level 2
Level 3
Total
Short-term investments:
$
12

$
299

$
—

$
311

Fixed Income Securities:
 
 
 
 
Corporate
—

1,469

13

1,482

RMBS
—

266

10

276

U.S. Treasuries
69

649

4

722

Foreign government
—

37

1

38

CMBS
—

131

—

131

Other fixed income [1]
—

96

18

114

  Mortgage Loans
—

—

121

121

Equity Securities:
 
 
 
 
Large-cap domestic
589

107

—

696

Mid-cap domestic
23

—

—

23

International
300

—

—

300

Total pension plan assets at fair value [2]
$
993

$
3,054

$
167

$
4,214

Other Investments [3]:
 
 
 
 
Private Market Alternatives
$
—

$
—

$
—

$
87

Hedge funds
$
—

$
—

$
—

$
340

Total pension plan assets
$
993

$
3,054

$
167

$
4,641

[1]
Includes ABS, municipal bonds, and CDOs.
[2]
Excludes approximately $2 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 $39 of interest receivable.
[3]
Represents investments that calculate net asset value per share or an equivalent measurement.
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

Total pension plan assets at fair value [2]
$
821

$
2,902

$
107

$
3,830

Other Investments [3]:
 
 
 
 
Private Market Alternatives
$
—

$
—

$
—

$
20

Hedge funds
$
—

$
—

$
—

$
620

Total pension plan assets
$
821

$
2,902

$
107

$
4,470

[1]
Includes ABS,municipal bonds, and CDOs.
[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.
[3]
Represents investments that calculate net asset value per share or an equivalent measurement.
Defined Benefit Plan Prior Contributions [Table Text Block]
Employer Contributions
Pension Benefits
Other Postretirement Benefits
2016
$
301

$
—

2015
$
101

$
—
Defined Benefit Plan, Expected Future Benefit Payments, Rolling Maturity [Abstract]  
Schedule of Expected Benefit Payments [Table Text Block]
 
Pension Benefits
Other Postretirement Benefits
2017
$
333

$
33

2018
339

30

2019
346

27

2020
353

24

2021
352

22

2022 - 2026
1,748

82

Total
$
3,471

$
218