v3.20.4

Pension And Postretirement Benefits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Defined Benefit Plan [Abstract] |
Schedule of Plan Obligations in Excess of Plan Assets | The following table presents the change in the projected benefit obligation for the years ended December 31:
| Pension Benefits |  | Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
Benefit obligation at beginning of year | $ | 59,873 |  |  | $ | 55,439 |  |  | $ | 16,041 |  |  | $ | 19,378 |
Service cost - benefits earned during the period | 1,029 |  |  | 1,019 |  |  | 53 |  |  | 71 |
Interest cost on projected benefit obligation | 1,687 |  |  | 1,960 |  |  | 416 |  |  | 675 |
Amendments | (340) |  |  | — |  |  | (2,655) |  |  | (4,590) |
Actuarial (gain) loss | 5,054 |  |  | 7,734 |  |  | 1,423 |  |  | 2,050 |
Special termination benefits | — |  |  | 81 |  |  | — |  |  | — |
Benefits paid | (5,124) |  |  | (6,356) |  |  | (1,370) |  |  | (1,543) |
Curtailment | (1) |  |  | — |  |  | — |  |  | — |
Plan transfers | (20) |  |  | (4) |  |  | 20 |  |  | — |
Benefit obligation at end of year | $ | 62,158 |  |  | $ | 59,873 |  |  | $ | 13,928 |  |  | $ | 16,041 |
The following table presents the change in the fair value of plan assets for the years ended December 31 and the plans’ funded status at December 31:
| Pension Benefits |  | Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
Fair value of plan assets at beginning of year | $ | 53,530 |  |  | $ | 51,681 |  |  | $ | 4,145 |  |  | $ | 4,277 |
Actual return on plan assets | 6,199 |  |  | 8,207 |  |  | 302 |  |  | 609 |
Benefits paid 1 | (5,124) |  |  | (6,356) |  |  | (1,029) |  |  | (941) |
Contributions | 2 |  |  | 2 |  |  | 425 |  |  | 200 |
Plan transfers | (1) |  |  | (4) |  |  | — |  |  | — |
Fair value of plan assets at end of year | 54,606 |  |  | 53,530 |  |  | 3,843 |  |  | 4,145 |
Unfunded status at end of year 2 | $ | (7,552) |  |  | $ | (6,343) |  |  | $ | (10,085) |  |  | $ | (11,896) |
1 At our discretion, certain postretirement benefits may be paid from our cash accounts, which does not reduce Voluntary Employee Benefit Association (VEBA) assets. Future benefit payments may be made from VEBA trusts and thus reduce those asset balances.
2 Funded status is not indicative of our ability to pay ongoing pension benefits or of our obligation to fund retirement trusts. Required pension funding is determined in accordance with the Employee Retirement Income Security Act of 1974, as amended (ERISA) and applicable regulations.
Amounts recognized on our consolidated balance sheets at December 31 are listed below:
| Pension Benefits |  | Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
Current portion of employee benefit obligation 1 | $ | — |  |  | $ | — |  |  | $ | (1,213) |  |  | $ | (1,365) |
Employee benefit obligation 2 | (7,552) |  |  | (6,343) |  |  | (8,872) |  |  | (10,531) |
Net amount recognized | $ | (7,552) |  |  | $ | (6,343) |  |  | $ | (10,085) |  |  | $ | (11,896) |
1 Included in “Accounts payable and accrued liabilities.”
2 Included in “Postemployment benefit obligation,” combined with international pension obligations and other postemployment obligations of $553 and $1,299 at December 31, 2020, respectively.
Schedule Of Defined Benefit Plan And Postretirement Benefits Disclosure | The following table presents the components of net periodic benefit cost (credit):
| Pension Benefits 1 |  | Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Service cost – benefits earned during the period | $ | 1,029 |  |  | $ | 1,019 |  |  | $ | 1,116 |  |  | $ | 53 |  |  | $ | 71 |  |  | $ | 109 |
Interest cost on projected benefit obligation | 1,687 |  |  | 1,960 |  |  | 2,092 |  |  | 416 |  |  | 675 |  |  | 778 |
Expected return on assets | (3,557) |  |  | (3,561) |  |  | (3,190) |  |  | (178) |  |  | (227) |  |  | (304) |
Amortization of prior service credit | (113) |  |  | (113) |  |  | (115) |  |  | (2,329) |  |  | (1,820) |  |  | (1,635) |
Actuarial (gain) loss | 2,404 |  |  | 3,088 |  |  | (812) |  |  | 1,299 |  |  | 1,670 |  |  | (2,290) |
Net pension and postretirement cost (credit) | $ | 1,450 |  |  | $ | 2,393 |  |  | $ | (909) |  |  | $ | (739) |  |  | $ | 369 |  |  | $ | (3,342) |
1 Net periodic pension cost (credit) excludes immediate cost recognized due to special events: curtailment gain of ($1) in 2020 and special termination benefits of $81 in 2019.
Other Changes in Benefit Obligations Recognized in Other Comprehensive Income The following table presents the after-tax changes in benefit obligations recognized in OCI and the after-tax prior service credits that were amortized from OCI into net periodic benefit costs:
| Pension Benefits |  | Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Balance at beginning of year | $ | 361 |  |  | $ | 447 |  |  | $ | 571 |  |  | $ | 8,171 |  |  | $ | 6,086 |  |  | $ | 6,456 |
Prior service (cost) credit | 250 |  |  | — |  |  | (37) |  |  | 2,001 |  |  | 3,457 |  |  | 864 |
Amortization of prior service credit | (86) |  |  | (86) |  |  | (87) |  |  | (1,756) |  |  | (1,372) |  |  | (1,234) |
Total recognized in other comprehensive (income) loss | 164 |  |  | (86) |  |  | (124) |  |  | 245 |  |  | 2,085 |  |  | (370) |
Balance at end of year | $ | 525 |  |  | $ | 361 |  |  | $ | 447 |  |  | $ | 8,416 |  |  | $ | 8,171 |  |  | $ | 6,086 |
Schedule of Assumptions in Determining the Projected Benefit Obligation and Net Pension and Postretirement Benefit Cost | In determining the projected benefit obligation and the net pension and postretirement benefit cost, we used the following significant weighted-average assumptions:
| Pension Benefits |  | Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Weighted-average discount rate for determining benefit obligation at December 31 | 2.70 | % |  | 3.40 | % |  | 4.50 | % |  | 2.40 | % |  | 3.20 | % |  | 4.40 | %
Discount rate in effect for determining service cost 1, 2 | 3.60 | % |  | 4.10 | % |  | 4.20 | % |  | 3.50 | % |  | 4.40 | % |  | 4.30 | %
Discount rate in effect for determining interest cost 1,2 | 2.90 | % |  | 3.50 | % |  | 3.80 | % |  | 2.70 | % |  | 3.70 | % |  | 3.60 | %
Weighted-average interest credit rate for cash balance pension programs 3 | 3.10 | % |  | 3.30 | % |  | 3.70 | % |  | — | % |  | — | % |  | — | %
Long-term rate of return on plan assets | 7.00 | % |  | 7.00 | % |  | 7.00 | % |  | 4.75 | % |  | 5.75 | % |  | 5.75 | %
Composite rate of compensation increase for determining benefit obligation | 3.00 | % |  | 3.00 | % |  | 3.00 | % |  | 3.00 | % |  | 3.00 | % |  | 3.00 | %
Composite rate of compensation increase for determining net cost (benefit) | 3.00 | % |  | 3.00 | % |  | 3.00 | % |  | 3.00 | % |  | 3.00 | % |  | 3.00 | %
1 Weighted-average discount rate for pension benefits in effect from January 1, 2019 through March 31, 2019 was 4.60% for service cost and 4.20% for interest cost, from April 1, 2019 through June 30, 2019 was 4.30% for service cost and 3.70% for interest cost, from July 1, 2019 through September 30, 2019 was 3.90% for service cost and 3.20% for interest cost, and, from October 1, 2019 through December 31, 2019 was 3.50% for service cost and 3.00% for interest cost.
2 Weighted-average discount rate for postretirement benefits in effect from January 1, 2019 through October 1, 2019 was 4.70% for service cost and 4.00% for interest cost, and, from October 2, 2019 through December 31, 2019 was 3.40% for service cost and 2.70% for interest cost.
3 Weighted-average interest crediting rates for cash balance pension programs relate only to the cash balance portion of total pension benefits. A 0.50% increase in the weighted-average interest crediting rate would increase the pension benefit obligation by $130.
Schedule of Defined Benefit Plan Targeted and Actual Plan Asset Allocations | The plans’ weighted-average asset targets and actual allocations as a percentage of plan assets, including the notional exposure of future contracts by asset categories at December 31 are as follows:
| Pension Assets |  | Postretirement (VEBA) Assets
| Target |  | 2020 |  | 2019 |  | Target |  | 2020 |  | 2019
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Domestic | 16 | % | - | 26 | % |  | 19 | % |  | 17 | % |  | 14 | % | - | 24 | % |  | 19 | % |  | 20 | %
International | 10 | % | - | 20 | % |  | 15 |  |  | 12 |  |  | 9 | % | - | 19 | % |  | 14 |  |  | 12 |
Fixed income securities | 37 | % | - | 47 | % |  | 35 |  |  | 35 |  |  | 40 | % | - | 50 | % |  | 45 |  |  | 52 |
Real assets | 8 | % | - | 18 | % |  | 8 |  |  | 9 |  |  | — | % | - | 6 | % |  | 1 |  |  | 1 |
Private equity | 5 | % | - | 15 | % |  | 9 |  |  | 8 |  |  | — | % | - | 6 | % |  | 1 |  |  | 2 |
Preferred interest | 6 | % | - | 16 | % |  | 10 |  |  | 17 |  |  | — | % | - | — | % |  | — |  |  | — |
Other | — | % | - | 5 | % |  | 4 |  |  | 2 |  |  | 15 | % | - | 25 | % |  | 20 |  |  | 13 |
Total |  |  |  |  | 100 | % |  | 100 | % |  |  |  |  |  | 100 | % |  | 100 | %
Schedule of Fair Value of Pension and Postretirement Assets and Liabilities by Level | The following tables set forth by level, within the fair value hierarchy, the pension and postretirement assets and liabilities at fair value as of December 31, 2020:
Pension Assets and Liabilities at Fair Value as of December 31, 2020
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Non-interest bearing cash | $ | 173 |  |  | $ | — |  |  | $ | — |  |  | $ | 173 |
Interest bearing cash | 7 |  |  | — |  |  | — |  |  | 7 |
Foreign currency contracts | — |  |  | 3 |  |  | — |  |  | 3 |
Equity securities: |  |  |  |  |  |  |
Domestic equities | 9,784 |  |  | — |  |  | 11 |  |  | 9,795 |
International equities | 4,821 |  |  | 11 |  |  | 12 |  |  | 4,844 |
Preferred interest | — |  |  | — |  |  | 5,771 |  |  | 5,771 |
Fixed income securities: |  |  |  |  |  |  |
Corporate bonds and other investments | — |  |  | 11,043 |  |  | 52 |  |  | 11,095 |
Government and municipal bonds | — |  |  | 6,039 |  |  | — |  |  | 6,039 |
Mortgage-backed securities | — |  |  | 442 |  |  | 1 |  |  | 443 |
Real estate and real assets | — |  |  | — |  |  | 2,544 |  |  | 2,544 |
Securities lending collateral | 621 |  |  | 1,435 |  |  | — |  |  | 2,056 |
Receivable for variation margin | 23 |  |  | — |  |  | — |  |  | 23 |
Assets at fair value | 15,429 |  |  | 18,973 |  |  | 8,391 |  |  | 42,793 |
Investments sold short and other liabilities at fair value | (450) |  |  | (8) |  |  | (1) |  |  | (459) |
Total plan net assets at fair value | $ | 14,979 |  |  | $ | 18,965 |  |  | $ | 8,390 |  |  | $ | 42,334 |
Assets held at net asset value practical expedient |  |  |  |  |  |  |
Private equity funds |  |  |  |  |  |  | 5,154 |
Real estate funds |  |  |  |  |  |  | 1,694 |
Commingled funds |  |  |  |  |  |  | 7,706 |
Total assets held at net asset value practical expedient |  |  |  |  |  |  | 14,554 |
Other assets (liabilities) 1 |  |  |  |  |  |  | (2,282) |
Total Plan Net Assets |  |  |  |  |  |  | $ | 54,606 |
1 Other assets (liabilities) include amounts receivable, accounts payable and net adjustment for securities lending payable.
Postretirement Assets and Liabilities at Fair Value as of December 31, 2020
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Interest bearing cash | $ | 497 |  |  | $ | 302 |  |  | $ | — |  |  | $ | 799 |
Equity securities: |  |  |  |  |  |  |
Domestic equities | 363 |  |  | — |  |  | — |  |  | 363 |
International equities | 282 |  |  | — |  |  | — |  |  | 282 |
Fixed income securities:
Corporate bonds and other investments | 5 |  |  | 307 |  |  | 3 |  |  | 315 |
Government and municipal bonds | 6 |  |  | 132 |  |  | 1 |  |  | 139 |
Mortgage-backed securities | — |  |  | 94 |  |  | — |  |  | 94 |
Securities lending collateral | — |  |  | 28 |  |  | — |  |  | 28 |
Assets at fair value | 1,153 |  |  | 863 |  |  | 4 |  |  | 2,020 |
Securities lending payable and other liabilities | (1) |  |  | (29) |  |  | — |  |  | (30) |
Total plan net assets at fair value | $ | 1,152 |  |  | $ | 834 |  |  | $ | 4 |  |  | $ | 1,990 |
Assets held at net asset value practical expedient |  |  |  |  |  |  |
Commingled funds |  |  |  |  |  |  | 1,843 |
Private equity |  |  |  |  |  |  | 24 |
Real estate funds |  |  |  |  |  |  | 22 |
Total assets held at net asset value practical expedient |  |  |  |  |  |  | 1,889 |
Other assets (liabilities)1 |  |  |  |  |  |  | (36) |
Total Plan Net Assets |  |  |  |  |  |  | $ | 3,843 |
1 Other assets (liabilities) include amounts receivable and accounts payable.
The following tables set forth by level, within the fair value hierarchy, the pension and postretirement assets and liabilities at fair value as of December 31, 2019:
Pension Assets and Liabilities at Fair Value as of December 31, 2019
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Non-interest bearing cash | $ | 85 |  |  | $ | — |  |  | $ | — |  |  | $ | 85 |
Interest bearing cash | 529 |  |  | — |  |  | — |  |  | 529 |
Foreign currency contracts | — |  |  | 5 |  |  | — |  |  | 5 |
Equity securities: |  |  |  |  |  |  |
Domestic equities | 8,068 |  |  | — |  |  | 4 |  |  | 8,072 |
International equities | 3,929 |  |  | 11 |  |  | 6 |  |  | 3,946 |
Preferred interest | — |  |  | — |  |  | 8,806 |  |  | 8,806 |
Fixed income securities: |  |  |  |  |  |  |
Corporate bonds and other investments | — |  |  | 10,469 |  |  | 4 |  |  | 10,473 |
Government and municipal bonds | 49 |  |  | 6,123 |  |  | — |  |  | 6,172 |
Mortgage-backed securities | — |  |  | 522 |  |  | 2 |  |  | 524 |
Real estate and real assets | — |  |  | — |  |  | 2,817 |  |  | 2,817 |
Securities lending collateral | 103 |  |  | 1,658 |  |  | — |  |  | 1,761 |
Receivable for variation margin | 5 |  |  | — |  |  | — |  |  | 5 |
Assets at fair value | 12,768 |  |  | 18,788 |  |  | 11,639 |  |  | 43,195 |
Investments sold short and other liabilities at fair value | (513) |  |  | (2) |  |  | — |  |  | (515) |
Total plan net assets at fair value | $ | 12,255 |  |  | $ | 18,786 |  |  | $ | 11,639 |  |  | $ | 42,680 |
Assets held at net asset value practical expedient |  |  |  |  |  |  |
Private equity funds |  |  |  |  |  |  | 4,544 |
Real estate funds |  |  |  |  |  |  | 2,062 |
Commingled funds |  |  |  |  |  |  | 5,710 |
Total assets held at net asset value practical expedient |  |  |  |  |  |  | 12,316 |
Other assets (liabilities) 1 |  |  |  |  |  |  | (1,466) |
Total Plan Net Assets |  |  |  |  |  |  | $ | 53,530 |
1 Other assets (liabilities) include amounts receivable, accounts payable and net adjustment for securities lending payable.
Postretirement Assets and Liabilities at Fair Value as of December 31, 2019
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Interest bearing cash | $ | 248 |  |  | $ | 301 |  |  | $ | — |  |  | $ | 549 |
Equity securities: |  |  |  |  |  |  |
Domestic equities | 438 |  |  | — |  |  | — |  |  | 438 |
International equities | 265 |  |  | — |  |  | — |  |  | 265 |
Fixed income securities: |  |  |  |  |  |  |
Corporate bonds and other investments | 7 |  |  | 492 |  |  | 31 |  |  | 530 |
Government and municipal bonds | 6 |  |  | 182 |  |  | 1 |  |  | 189 |
Mortgage-backed securities | — |  |  | 294 |  |  | — |  |  | 294 |
Securities lending collateral | — |  |  | 36 |  |  | — |  |  | 36 |
Assets at fair value | 964 |  |  | 1,305 |  |  | 32 |  |  | 2,301 |
Securities lending payable and other liabilities | — |  |  | (36) |  |  | — |  |  | (36) |
Total plan net assets at fair value | $ | 964 |  |  | $ | 1,269 |  |  | $ | 32 |  |  | $ | 2,265 |
Assets held at net asset value practical expedient |  |  |  |  |  |  |
Private equity funds |  |  |  |  |  |  | 66 |
Real estate funds |  |  |  |  |  |  | 27 |
Commingled funds |  |  |  |  |  |  | 1,797 |
Total assets held at net asset value practical expedient |  |  |  |  |  |  | 1,890 |
Other assets (liabilities) 1 |  |  |  |  |  |  | (10) |
Total Plan Net Assets |  |  |  |  |  |  | $ | 4,145 |
1 Other assets (liabilities) include amounts receivable and accounts payable.
Summary of Changes in The Fair Value of the Level 3 Pension and Postretirement Assets | The tables below set forth a summary of changes in the fair value of the Level 3 pension and postretirement assets for the year ended December 31, 2020:
Pension Assets | Equities |  | Fixed Income Funds |  | Real Estate and Real Assets |  | Total
Balance at beginning of year | $ | 8,816 |  |  | $ | 6 |  |  | $ | 2,817 |  |  | $ | 11,639 |
Realized gains (losses) | (150) |  |  | — |  |  | 255 |  |  | 105 |
Unrealized gains (losses) | 3 |  |  | — |  |  | (178) |  |  | (175) |
Transfers in | 4 |  |  | 51 |  |  | 36 |  |  | 91 |
Transfers out | — |  |  | (3) |  |  | — |  |  | (3) |
Purchases | 9,114 |  |  | 1 |  |  | 223 |  |  | 9,338 |
Sales | (11,994) |  |  | (2) |  |  | (609) |  |  | (12,605) |
Balance at end of year | $ | 5,793 |  |  | $ | 53 |  |  | $ | 2,544 |  |  | $ | 8,390 |
Postretirement Assets | Equities |  | Fixed Income Funds |  | Real Estate and Real Assets |  | Total
Balance at beginning of year | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |
Transfers in | — |  |  | 3 |  |  | — |  |  | 3 |
Transfers out | — |  |  | (11) |  |  | — |  |  | (11) |
Sales | — |  |  | (20) |  |  | — |  |  | (20) |
Balance at end of year | $ | — |  |  | $ | 4 |  |  | $ | — |  |  | $ | 4 |
The tables below set forth a summary of changes in the fair value of the Level 3 pension and postretirement assets for the year ended December 31, 2019:
Pension Assets | Equities |  | Fixed Income Funds |  | Real Estate and Real Assets |  | Total
Balance at beginning of year | $ | 8,750 |  |  | $ | 4 |  |  | $ | 2,579 |  |  | $ | 11,333 |
Realized gains (losses) | — |  |  | — |  |  | 64 |  |  | 64 |
Unrealized gains (losses) | 58 |  |  | — |  |  | 45 |  |  | 103 |
Transfers in | 8 |  |  | 5 |  |  | 134 |  |  | 147 |
Transfers out | — |  |  | (6) |  |  | — |  |  | (6) |
Purchases | — |  |  | 7 |  |  | 228 |  |  | 235 |
Sales | — |  |  | (4) |  |  | (233) |  |  | (237) |
Balance at end of year | $ | 8,816 |  |  | $ | 6 |  |  | $ | 2,817 |  |  | $ | 11,639 |
Postretirement Assets | Equities |  | Fixed Income Funds |  | Real Estate and Real Assets |  | Total
Balance at beginning of year | $ | 1 |  |  | $ | 12 |  |  | $ | — |  |  | $ | 13 |
Transfers in | — |  |  | 28 |  |  | — |  |  | 28 |
Transfers out | — |  |  | (1) |  |  | — |  |  | (1) |
Sales | (1) |  |  | (7) |  |  | — |  |  | (8) |
Balance at end of year | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |
Estimated Future Benefit Payments | The following table provides expected benefit payments under our pension and postretirement plans:
| Pension Benefits |  | Postretirement Benefits
2021 | $ | 5,391 |  |  | $ | 1,392 |
2022 | 4,597 |  |  | 1,231 |
2023 | 4,428 |  |  | 1,159 |
2024 | 4,323 |  |  | 879 |
2025 | 4,234 |  |  | 832 |
Years 2026 - 2030 | 19,646 |  |  | 3,651 |

X
- Definition disclosures of the defined benefit plans by plan type as well as by asset measurement. + References No definition available. + Details
Name: | t_ScheduleOfPensionAndPostretirementAssetsAndLiabilitiesAtFairValueByLevelTableTextBlock
Namespace Prefix: | t_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition This schedule presents disclosures regarding the obligations in excess of plan assets for the supplemental retirement plans as well as the non-US plans. + References No definition available. + Details
Name: | t_ScheduleOfPlanObligationsInExcessOfPlanAssetsTableTextBlock
Namespace Prefix: | t_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock
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 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 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 benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + 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 (f) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration