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Benefit Plans Amounts Recognized on TVA's Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Defined Benefit Plan Disclosure |  |  |
Regulatory assets |  | $ 6,612 | $ 8,698
Non-current regulatory liabilities |  | 104 | 25
Accounts payable and accrued liabilities |  | (1,982) | (1,940)
Pension and post-retirement benefit obligations |  | (4,476) | (5,477)
Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Amount capitalized due to actions of regulator |  | 96 | 42
Regulatory assets |  | 3,119 | 4,009
Accounts payable and accrued liabilities |  | (6) | (4)
Pension and post-retirement benefit obligations | [1] | (3,716) | (4,608)
Other Post-retirement Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Amount capitalized due to actions of regulator |  | 0 | 0
Regulatory assets |  |  | 23
Non-current regulatory liabilities |  | 73 |
Accounts payable and accrued liabilities |  | (28) | (33)
Pension and post-retirement benefit obligations | [1] | (400) | (461)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent |  |  |
Defined Benefit Plan Disclosure |  |  |
Postemployment benefits liability, noncurrent |  | $ 360 | $ 408
[1] | The table above excludes $360 million and $408 million of post-employment benefit costs that are recorded in Post-retirement and post-employment benefit obligations on the Consolidated Balance Sheets at September 30, 2018 and 2017, respectively.

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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