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Benefit Plans Amounts Recognized on TVA's Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | ---
Defined Benefit Plan Disclosure |  |  |
Regulatory assets |  | $ 10,164 | $ 10,418
Accounts payable and accrued liabilities |  | (2,163) | (2,127)
Post-retirement and post-employment benefit obligations |  | (6,929) | (7,107)
Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan amounts deferred as regulatory assets actions by regulators |  | 407 | 228
Regulatory assets |  | 5,336 | 5,425
Accounts payable and accrued liabilities |  | (5) | (6)
Post-retirement and post-employment benefit obligations | [1] | (5,933) | (6,021)
Other Post-retirement Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan amounts deferred as regulatory assets actions by regulators |  | 0 | 0
Regulatory assets |  | 49 | 140
Accounts payable and accrued liabilities |  | (35) | (37)
Post-retirement and post-employment benefit obligations | [1] | (536) | (620)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent |  |  |
Defined Benefit Plan Disclosure |  |  |
Postemployment benefits liability, noncurrent |  | $ 460 | $ 465
[1] | The table above excludes $460 million and $465 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, 2016 and 2015, 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://www.xbrl.org/2003/role/presentationRef -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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- Definition This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 + Details
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