XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.20.2

Employee Benefit Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Share-based Payment Arrangement, Cost by Plan [Table Text Block] | We measure the cost of all share-based payments, including stock options, at fair value on the grant date and recognize this cost in the Consolidated Statement of Operations, net of expected forfeitures, as follows:
(dollars in millions) | 2019 |  | 2018 |  | 2017
Total compensation cost recognized | $ | 268 |  |  | $ | 169 |  |  | $ | 129 |
Schedule of Stock Options Roll Forward [Table Text Block] | A summary of the transactions under all long-term incentive plans for the year ended December 31, 2019 follows. The amounts in the tables and paragraphs below have not been recast for discontinued operations.
| Stock Options |  |  |  | Stock Appreciation Rights |  |  |  | Performance Share Units |  |  |  | Other Incentive Shares/Units
(shares and units in thousands) | Shares |  | Average Price (1) |  | Shares |  | Average Price (1) |  | Units |  | Average Price (1) |  |
Outstanding at: |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 | 1,603 |  |  | $ | 99.89 |  |  | 32,066 |  |  | $ | 99.95 |  |  | 1,806 |  |  | $ | 110.41 |  |  | 3,047 |
Granted | 339 |  |  | 124.72 |  |  | 8,081 |  |  | 123.54 |  |  | 839 |  |  | 121.22 |  |  | 1,223 |
Ancillary (2) | — |  |  | — |  |  | — |  |  | — |  |  | 101 |  |  | 95.28 |  |  | — |
Exercised / earned | (317) |  |  | 88.61 |  |  | (6,843) |  |  | 84.44 |  |  | (758) |  |  | 95.28 |  |  | (816) |
Cancelled | (57) |  |  | 121.69 |  |  | (591) |  |  | 122.76 |  |  | (69) |  |  | 118.21 |  |  | (135) |
December 31, 2019 | 1,568 |  |  | $ | 106.75 |  |  | 32,713 |  |  | $ | 108.61 |  |  | 1,919 |  |  | $ | 120.04 |  |  | 3,319 |
(1) Weighted-average grant / exercise price. (2) Ancillary shares earned based on actual performance achieved on the 2016 award.
Disclosure Of Share Based Compensation Arrangements By Share Based Payment Award Text Block | The following table summarizes information about equity awards outstanding that are vested and expected to vest as well as equity awards outstanding that are exercisable at December 31, 2019:
|  | Equity Awards Vested and Expected to Vest |  |  |  |  |  |  |  | Equity Awards That Are Exercisable |  |  |  |  |  |
(shares in thousands; aggregate intrinsic value in millions) |  | Awards |  | Average Price (1) |  | Aggregate Intrinsic Value |  | Remaining Term (2) |  | Awards |  | Average Price (1) |  | Aggregate Intrinsic Value |  | Remaining Term (2)
Stock Options/Stock Appreciation Rights |  | 33,769 |  |  | $ | 107.58 |  |  | $ | 1,424 |  |  | 5.9 years |  | 19,285 |  |  | $ | 96.56 |  |  | $ | 1,026 |  |  | 4.0 years
Performance Share Units/Restricted Stock |  | 5,514 |  |  | — |  |  | 826 |  |  | 2.1 years |  |  |  |  |  |  |  |
(1) Weighted-average exercise price per share. (2) Weighted-average contractual remaining term in years.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following table indicates the assumptions used in estimating fair value for the years ended December 31, 2019, 2018 and 2017. Lattice-based option models incorporate ranges of assumptions for inputs; those ranges are as follows:
|  | 2019 |  | 2018 |  | 2017
Expected volatility |  | 18.8% - 19.7% |  | 17.5% - 21.1% |  | 19 | %
Weighted-average volatility |  | 20 | % |  | 18 | % |  | 19 | %
Expected term (in years) |  | 6.5 - 6.6 |  | 6.5 - 6.6 |  | 6.5
Expected dividend yield |  | 2.4 | % |  | 2.2 | % |  | 2.4 | %
Risk-free rate |  | 2.3% - 2.7% |  | 1.3% - 2.7% |  | 0.5% - 2.5%
Pension Plan [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Defined Benefit Plans Disclosures [Text Block] |
(dollars in millions) | 2019 |  | 2018
Change in Benefit Obligation: |  |  |
Beginning balance | $ | 34,344 |  |  | $ | 33,283 |
Service cost attributable to continuing operations | 261 |  |  | 265 |
Service cost attributable to discontinued operations | 34 |  |  | 40 |
Interest cost | 1,245 |  |  | 1,058 |
Actuarial loss (gain) | 4,247 |  |  | (1,938) |
Total benefits paid | (2,016) |  |  | (1,783) |
Net settlement, curtailment and special termination benefits | (206) |  |  | (14) |
Plan amendments | — |  |  | 56 |
Business combinations | (6) |  |  | 3,694 |
Other | 124 |  |  | (317) |
Ending balance | $ | 38,027 |  |  | $ | 34,344 |
Change in Plan Assets: |  |  |
Beginning balance | $ | 32,150 |  |  | $ | 32,205 |
Actual return on plan assets | 5,873 |  |  | (1,516) |
Employer contributions | 137 |  |  | 156 |
Benefits paid | (2,016) |  |  | (1,783) |
Settlements | (17) |  |  | (16) |
Business combinations | (10) |  |  | 3,355 |
Other | 108 |  |  | (251) |
Ending balance | $ | 36,225 |  |  | $ | 32,150 |
Funded Status: |  |  |
Fair value of plan assets | $ | 36,225 |  |  | $ | 32,150 |
Benefit obligations | (38,027) |  |  | (34,344) |
Funded status of plan | $ | (1,802) |  |  | $ | (2,194) |
Amounts Recognized in the Consolidated Balance Sheet Consist of: |  |  |
Noncurrent assets | $ | 19 |  |  | $ | 157 |
Current liability | (51) |  |  | (56) |
Noncurrent liability | (1,770) |  |  | (2,295) |
Net amount recognized | $ | (1,802) |  |  | $ | (2,194) |
Amounts Recognized in Accumulated Other Comprehensive Loss Consist of: |  |  |
Net actuarial loss | $ | 8,160 |  |  | $ | 7,948 |
Prior service cost | 190 |  |  | 130 |
Net actuarial loss and prior service cost related to discontinued operations | 763 |  |  | 667 |
Net amount recognized | $ | 9,113 |  |  | $ | 8,745 |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block] | Information for pension plans with accumulated benefit obligations in excess of plan assets:
(dollars in millions) | 2019 |  | 2018
Projected benefit obligation | $ | 37,941 |  |  | $ | 24,796 |
Accumulated benefit obligation | 37,599 |  |  | 24,471 |
Fair value of plan assets | 36,120 |  |  | 22,558 |
Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] | Information for pension plans with projected benefit obligations in excess of plan assets:
(dollars in millions) | 2019 |  | 2018
Projected benefit obligation | $ | 37,943 |  |  | $ | 27,225 |
Accumulated benefit obligation | 37,600 |  |  | 26,752 |
Fair value of plan assets | 36,122 |  |  | 24,873 |
Schedule of Net Benefit Costs [Table Text Block] | The components of the net periodic pension benefit are as follows:
(dollars in millions) | 2019 |  | 2018 |  | 2017
Pension Benefits: |  |  |  |  |
Service cost | $ | 261 |  |  | $ | 265 |  |  | $ | 268 |
Interest cost | 1,245 |  |  | 1,058 |  |  | 1,043 |
Expected return on plan assets | (2,252) |  |  | (2,061) |  |  | (2,033) |
Amortization of prior service cost (credit) | 16 |  |  | (42) |  |  | (37) |
Recognized actuarial net loss | 245 |  |  | 373 |  |  | 550 |
Net settlement, curtailment and special termination benefits (gain) loss | (59) |  |  | 3 |  |  | 3 |
Net periodic pension benefit - employer | $ | (544) |  |  | $ | (404) |  |  | $ | (206) |
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2019 are as follows:
(dollars in millions) | Continuing Operations |  | Discontinued Operations |  | Total
Current year actuarial loss | $ | 434 |  |  | $ | 119 |  |  | $ | 553 |
Amortization of actuarial loss | (245) |  |  | (20) |  |  | (265) |
Current year prior service cost | — |  |  | 6 |  |  | 6 |
Amortization of prior service cost | (16) |  |  | (1) |  |  | (17) |
Net settlement and curtailment | 62 |  |  | (5) |  |  | 57 |
Other | 36 |  |  | (2) |  |  | 34 |
Total recognized in other comprehensive loss | $ | 271 |  |  | 97 |  |  | $ | 368 |
Net recognized in net periodic pension benefit and other comprehensive loss | $ | (232) |  |  | 97 |  |  | $ | (135) |
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] | The estimated amount that will be amortized from accumulated other comprehensive loss into net periodic pension (benefit) cost in 2020 is as follows:
(dollars in millions) |
Net actuarial loss | $ | 336 |
Prior service cost | 49 |
| $ | 385 |
Defined Benefit Plan, Assumptions [Table Text Block] | Major assumptions used in determining the benefit obligation and net cost for pension plans are presented in the following table as weighted-averages:
|  | Benefit Obligation |  |  |  | Net Cost |  |  |  |
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2017
Discount rate |  |  |  |  |  |  |  |  |  |
PBO |  | 3.1 | % |  | 4.0 | % |  | 4.0 | % |  | 3.5 | % |  | 3.9 | %
Interest cost (1) |  | — |  |  | — |  |  | 3.7 | % |  | 3.1 | % |  | 3.3 | %
Service cost (1) |  | — |  |  | — |  |  | 3.7 | % |  | 3.4 | % |  | 3.8 | %
Salary scale |  | 4.3 | % |  | 4.3 | % |  | 4.3 | % |  | 4.3 | % |  | 4.3 | %
Expected return on plan assets |  | — |  |  | — |  |  | 6.8 | % |  | 6.9 | % |  | 7.4 | %
(1) The discount rates used to measure the service cost and interest cost applies to our significant plans. The PBO discount rate is used for the service cost and interest cost measurements for non-significant plans.
Schedule of Allocation of Plan Assets [Table Text Block] | The fair values of pension plan assets at December 31, 2019 and 2018 by asset category are as follows:
(dollars in millions) | Quoted Prices in Active Markets For Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Not Subject to Leveling |  | Total
Asset Category: |  |  |  |  |  |  |  |  |
Public Equities |  |  |  |  |  |  |  |  |
Global Equities | $ | 3,588 |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,593 |
Global Equity Commingled Funds (1) | — |  |  | 1,496 |  |  | — |  |  | — |  |  | 1,496 |
Enhanced Global Equities (2) | 322 |  |  | 393 |  |  | — |  |  | — |  |  | 715 |
Global Equity Funds at net asset value (8) | — |  |  | — |  |  | — |  |  | 5,332 |  |  | 5,332 |
Private Equities (3),(8) | — |  |  | — |  |  | 202 |  |  | 1,230 |  |  | 1,432 |
Fixed Income Securities |  |  |  |  |  |  |  |  |
Governments | 969 |  |  | 116 |  |  | — |  |  | — |  |  | 1,085 |
Corporate Bonds | 1 |  |  | 13,059 |  |  | 5 |  |  | — |  |  | 13,065 |
Structured Products | — |  |  | 17 |  |  | — |  |  | — |  |  | 17 |
Fixed Income Securities (8) | — |  |  | — |  |  | — |  |  | 4,755 |  |  | 4,755 |
Real Estate (4),(8) | — |  |  | 13 |  |  | 1,464 |  |  | 366 |  |  | 1,843 |
Other (5),(8) | — |  |  | 343 |  |  | — |  |  | 2,834 |  |  | 3,177 |
Cash & Cash Equivalents (6),(8) | — |  |  | 47 |  |  | — |  |  | 36 |  |  | 83 |
Subtotal | $ | 4,880 |  |  | $ | 15,489 |  |  | $ | 1,671 |  |  | $ | 14,553 |  |  | 36,593 |
Other Assets & Liabilities (7) |  |  |  |  |  |  |  |  | (368) |
Total at December 31, 2019 |  |  |  |  |  |  |  |  | $ | 36,225 |
Public Equities |  |  |  |  |  |  |  |  |
Global Equities | $ | 2,917 |  |  | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,921 |
Global Equity Commingled Funds (1) | 185 |  |  | 219 |  |  | — |  |  | — |  |  | 404 |
Enhanced Global Equities (2) | 79 |  |  | 605 |  |  | — |  |  | — |  |  | 684 |
Global Equity Funds at net asset value (8) | — |  |  | — |  |  | — |  |  | 6,539 |  |  | 6,539 |
Private Equities (3),(8) | — |  |  | — |  |  | 133 |  |  | 1,194 |  |  | 1,327 |
Fixed Income Securities |  |  |  |  |  |  |  |  |
Governments | 1,789 |  |  | 162 |  |  | — |  |  | — |  |  | 1,951 |
Corporate Bonds | — |  |  | 11,526 |  |  | 18 |  |  | 29 |  |  | 11,573 |
Fixed Income Securities (8) | — |  |  | — |  |  | — |  |  | 2,225 |  |  | 2,225 |
Real Estate (4),(8) | — |  |  | 13 |  |  | 1,387 |  |  | 409 |  |  | 1,809 |
Other (5),(8) | — |  |  | 262 |  |  | — |  |  | 2,368 |  |  | 2,630 |
Cash & Cash Equivalents (6),(8) | — |  |  | 220 |  |  | — |  |  | 100 |  |  | 320 |
Subtotal | $ | 4,970 |  |  | $ | 13,011 |  |  | $ | 1,538 |  |  | $ | 12,864 |  |  | 32,383 |
Other Assets & Liabilities (7) |  |  |  |  |  |  |  |  | (233) |
Total at December 31, 2018 |  |  |  |  |  |  |  |  | $ | 32,150 |
(1) Represents commingled funds that invest primarily in common stocks. (2) Represents enhanced equity separate account and commingled fund portfolios. A portion of the portfolio may include long-short market neutral and relative value strategies that invest in publicly traded, equity and fixed income securities, as well as derivatives of equity and fixed income securities and foreign currency. (3) Represents limited partner investments with general partners that primarily invest in debt and equity. (4) Represents investments in real estate including commingled funds and directly held properties. (5) Represents insurance contracts and global balanced risk commingled funds consisting mainly of equity, bonds and some commodities. (6) Represents short-term commercial paper, bonds and other cash or cash-like instruments. (7) Represents trust receivables and payables that are not leveled. (8) In accordance with ASU 2015-07, Fair Value Measurement (Topic 820), certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented for the total pension benefits plan assets.
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] | The fair value measurement of plan assets using significant unobservable inputs (Level 3) changed due to the following:
(dollars in millions) |  |  | Private Equities |  | Corporate Bonds |  | Real Estate |  | Total
Balance, December 31, 2017 |  |  | $ | 46 |  |  | $ | — |  |  | $ | 1,446 |  |  | $ | 1,492 |
Plan assets acquired |  |  | — |  |  | 33 |  |  | — |  |  | 33 |
Realized (losses) gains |  |  | — |  |  | (1) |  |  | 10 |  |  | 9 |
Unrealized gains relating to instruments still held in the reporting period |  |  | — |  |  | 2 |  |  | 38 |  |  | 40 |
Purchases, sales, and settlements, net |  |  | 87 |  |  | (16) |  |  | (107) |  |  | (36) |
Balance, December 31, 2018 |  |  | 133 |  |  | 18 |  |  | 1,387 |  |  | 1,538 |
Realized losses |  |  | — |  |  | — |  |  | (2) |  |  | (2) |
Unrealized gains relating to instruments still held in the reporting period |  |  | 32 |  |  | — |  |  | 27 |  |  | 59 |
Purchases, sales, and settlements, net |  |  | 37 |  |  | (13) |  |  | 52 |  |  | 76 |
Balance, December 31, 2019 |  |  | $ | 202 |  |  | $ | 5 |  |  | $ | 1,464 |  |  | $ | 1,671 |
Other Postretirement Benefits Plan [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Defined Benefit Plans Disclosures [Text Block] |
(dollars in millions) | 2019 |  | 2018
Change in Benefit Obligation: |  |  |
Beginning balance | $ | 810 |  |  | $ | 767 |
Service cost | 2 |  |  | 2 |
Interest cost | 31 |  |  | 26 |
Actuarial gain | (11) |  |  | (52) |
Total benefits paid | (69) |  |  | (70) |
Business combinations | — |  |  | 186 |
Plan amendments | — |  |  | (43) |
Other | 2 |  |  | (6) |
Ending balance | $ | 765 |  |  | $ | 810 |
Change in Plan Assets: |  |  |
Beginning balance | $ | 20 |  |  | $ | — |
Employer contributions | 69 |  |  | 69 |
Benefits paid | (69) |  |  | (70) |
Business combinations | — |  |  | 20 |
Other | — |  |  | 1 |
Ending balance | $ | 20 |  |  | $ | 20 |
Funded Status: |  |  |
Fair value of plan assets | $ | 20 |  |  | $ | 20 |
Benefit obligations | (765) |  |  | (810) |
Funded status of plan | $ | (745) |  |  | $ | (790) |
Amounts Recognized in the Consolidated Balance Sheet Consist of: |  |  |
Current liability | $ | (47) |  |  | $ | (61) |
Noncurrent liability | (698) |  |  | (729) |
Net amount recognized | $ | (745) |  |  | $ | (790) |
Amounts Recognized in Accumulated Other Comprehensive Loss Consist of: |  |  |
Net actuarial gain | $ | (181) |  |  | $ | (184) |
Prior service credit | (4) |  |  | (47) |
Net amount recognized | $ | (185) |  |  | $ | (231) |
Schedule of Net Benefit Costs [Table Text Block] | The components of net periodic benefit cost are as follows:
(dollars in millions) | 2019 |  | 2018 |  | 2017
Other Postretirement Benefits: |  |  |  |  |
Service cost | $ | 2 |  |  | $ | 2 |  |  | $ | 2 |
Interest cost | 31 |  |  | 26 |  |  | 29 |
Expected return on plan assets | (1) |  |  | — |  |  | — |
Amortization of prior service credit | (42) |  |  | (6) |  |  | (1) |
Recognized actuarial net gain | (12) |  |  | (10) |  |  | (9) |
Net periodic other postretirement (benefit) cost | $ | (22) |  |  | $ | 12 |  |  | $ | 21 |
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2019 are as follows:
(dollars in millions) |
Current year actuarial gain | $ | (10) |
Amortization of prior service credit | 42 |
Amortization of actuarial net gain | 12 |
Other | 2 |
Total recognized in other comprehensive loss | $ | 46 |
Net recognized in net periodic other postretirement benefit cost and other comprehensive loss | $ | 24 |
Defined Benefit Plan, Assumptions [Table Text Block] | Major assumptions used in determining the benefit obligation and net cost for postretirement plans are presented in the following table as weighted-averages:
| Benefit Obligation |  |  |  | Net Cost |  |  |  |
| 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2017
Discount rate | 3.0 | % |  | 4.1 | % |  | 4.0 | % |  | 3.4 | % |  | 3.8 | %
Expected return on assets | — |  |  | — |  |  | 7.0 | % |  | 7.0 | % |  | N/A
Schedule of Health Care Cost Trend Rates [Table Text Block] | Assumed health care cost trend rates are as follows:
| 2019 |  | 2018
Health care cost trend rate assumed for next year | 6.5 | % |  | 7.0 | %
Rate that the cost trend rate gradually declines to | 5.0 | % |  | 5.0 | %
Year that the rate reaches the rate it is assumed to remain at | 2026 |  | 2026
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] | A one-percentage-point change in assumed health care cost trend rates would have the following effects:
| 2019 One-Percentage-Point |  |
(dollars in millions) | Increase |  | Decrease
Effect on total service and interest cost | $ | 1 |  |  | $ | (1) |
Effect on postretirement benefit obligation | 25 |  |  | (22) |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefit obligation and plan assets of defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
Name: | us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAssumptionsUsedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefit obligation and plan assets for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
Name: | us-gaap_ScheduleOfBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in plan assets and benefit obligations recognized in other comprehensive income (loss) during the period. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effect of fair value measurements using significant unobservable inputs (Level 3) on changes in plan assets of pension plans and/or other employee benefit plans for the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the assumed health care cost trend rates for the next year used to measure the expected cost of benefits covered by the plans, including the ultimate trend rate(s) and when that rate is expected to be achieved. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfHealthCareCostTrendRatesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
Name: | us-gaap_ScheduleOfStockOptionsRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for exercisable or convertible options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |