XML 106 R102.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Benefit Plans Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Fair Value, Inputs, Level 1 | Sep. 30, 2012 Fair Value, Inputs, Level 1 | Sep. 30, 2013 Fair Value, Inputs, Level 2 | Sep. 30, 2012 Fair Value, Inputs, Level 2 | Sep. 30, 2013 Fair Value, Inputs, Level 3 | Sep. 30, 2012 Fair Value, Inputs, Level 3 | Sep. 30, 2011 Fair Value, Inputs, Level 3 | Sep. 30, 2013 Equity securities | Sep. 30, 2012 Equity securities | Sep. 30, 2013 Equity securities Fair Value, Inputs, Level 1 | Sep. 30, 2012 Equity securities Fair Value, Inputs, Level 1 | Sep. 30, 2013 Equity securities Fair Value, Inputs, Level 2 | Sep. 30, 2012 Equity securities Fair Value, Inputs, Level 2 | Sep. 30, 2013 Equity securities Fair Value, Inputs, Level 3 | Sep. 30, 2012 Equity securities Fair Value, Inputs, Level 3 | Sep. 30, 2013 Preferred securities [Member] | Sep. 30, 2012 Preferred securities [Member] | Sep. 30, 2013 Preferred securities [Member] Fair Value, Inputs, Level 1 | Sep. 30, 2012 Preferred securities [Member] Fair Value, Inputs, Level 1 | Sep. 30, 2013 Preferred securities [Member] Fair Value, Inputs, Level 2 | Sep. 30, 2012 Preferred securities [Member] Fair Value, Inputs, Level 2 | Sep. 30, 2013 Preferred securities [Member] Fair Value, Inputs, Level 3 | Sep. 30, 2012 Preferred securities [Member] Fair Value, Inputs, Level 3 | Sep. 30, 2013 Corporate debt securities | Sep. 30, 2012 Corporate debt securities | Sep. 30, 2013 Corporate debt securities Fair Value, Inputs, Level 1 | Sep. 30, 2012 Corporate debt securities Fair Value, Inputs, Level 1 | Sep. 30, 2013 Corporate debt securities Fair Value, Inputs, Level 2 | Sep. 30, 2012 Corporate debt securities Fair Value, Inputs, Level 2 | Sep. 30, 2013 Corporate debt securities Fair Value, Inputs, Level 3 | Sep. 30, 2012 Corporate debt securities Fair Value, Inputs, Level 3 | Sep. 30, 2013 Residential mortgage-backed securities | Sep. 30, 2012 Residential mortgage-backed securities | Sep. 30, 2013 Residential mortgage-backed securities Fair Value, Inputs, Level 1 | Sep. 30, 2012 Residential mortgage-backed securities Fair Value, Inputs, Level 1 | Sep. 30, 2013 Residential mortgage-backed securities Fair Value, Inputs, Level 2 | Sep. 30, 2012 Residential mortgage-backed securities Fair Value, Inputs, Level 2 | Sep. 30, 2013 Residential mortgage-backed securities Fair Value, Inputs, Level 3 | Sep. 30, 2012 Residential mortgage-backed securities Fair Value, Inputs, Level 3 | Sep. 30, 2013 Debt securities issued by U.S. Treasury and other U.S. government agencies | Sep. 30, 2012 Debt securities issued by U.S. Treasury and other U.S. government agencies | Sep. 30, 2013 Debt securities issued by U.S. Treasury and other U.S. government agencies Fair Value, Inputs, Level 1 | Sep. 30, 2012 Debt securities issued by U.S. Treasury and other U.S. government agencies Fair Value, Inputs, Level 1 | Sep. 30, 2013 Debt securities issued by U.S. Treasury and other U.S. government agencies Fair Value, Inputs, Level 2 | Sep. 30, 2012 Debt securities issued by U.S. Treasury and other U.S. government agencies Fair Value, Inputs, Level 2 | Sep. 30, 2013 Debt securities issued by U.S. Treasury and other U.S. government agencies Fair Value, Inputs, Level 3 | Sep. 30, 2012 Debt securities issued by U.S. Treasury and other U.S. government agencies Fair Value, Inputs, Level 3 | Sep. 30, 2013 Debt securities issued by foreign governments | Sep. 30, 2012 Debt securities issued by foreign governments | Sep. 30, 2013 Debt securities issued by foreign governments Fair Value, Inputs, Level 1 | Sep. 30, 2012 Debt securities issued by foreign governments Fair Value, Inputs, Level 1 | Sep. 30, 2013 Debt securities issued by foreign governments Fair Value, Inputs, Level 2 | Sep. 30, 2012 Debt securities issued by foreign governments Fair Value, Inputs, Level 2 | Sep. 30, 2013 Debt securities issued by foreign governments Fair Value, Inputs, Level 3 | Sep. 30, 2012 Debt securities issued by foreign governments Fair Value, Inputs, Level 3 | Sep. 30, 2013 Asset-backed securities | Sep. 30, 2012 Asset-backed securities | Sep. 30, 2013 Asset-backed securities Fair Value, Inputs, Level 1 | Sep. 30, 2012 Asset-backed securities Fair Value, Inputs, Level 1 | Sep. 30, 2013 Asset-backed securities Fair Value, Inputs, Level 2 | Sep. 30, 2012 Asset-backed securities Fair Value, Inputs, Level 2 | Sep. 30, 2013 Asset-backed securities Fair Value, Inputs, Level 3 | Sep. 30, 2012 Asset-backed securities Fair Value, Inputs, Level 3 | Sep. 30, 2013 Debt securities issued by state/local governments | Sep. 30, 2012 Debt securities issued by state/local governments | Sep. 30, 2013 Debt securities issued by state/local governments Fair Value, Inputs, Level 1 | Sep. 30, 2012 Debt securities issued by state/local governments Fair Value, Inputs, Level 1 | Sep. 30, 2013 Debt securities issued by state/local governments Fair Value, Inputs, Level 2 | Sep. 30, 2012 Debt securities issued by state/local governments Fair Value, Inputs, Level 2 | Sep. 30, 2013 Debt securities issued by state/local governments Fair Value, Inputs, Level 3 | Sep. 30, 2012 Debt securities issued by state/local governments Fair Value, Inputs, Level 3 | Sep. 30, 2013 Commercial mortgage-backed securities | Sep. 30, 2012 Commercial mortgage-backed securities | Sep. 30, 2013 Commercial mortgage-backed securities Fair Value, Inputs, Level 1 | Sep. 30, 2012 Commercial mortgage-backed securities Fair Value, Inputs, Level 1 | Sep. 30, 2013 Commercial mortgage-backed securities Fair Value, Inputs, Level 2 | Sep. 30, 2012 Commercial mortgage-backed securities Fair Value, Inputs, Level 2 | Sep. 30, 2013 Commercial mortgage-backed securities Fair Value, Inputs, Level 3 | Sep. 30, 2012 Commercial mortgage-backed securities Fair Value, Inputs, Level 3 | Sep. 30, 2013 Equity security commingled funds | Sep. 30, 2012 Equity security commingled funds | Sep. 30, 2013 Equity security commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Equity security commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Equity security commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Equity security commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Equity security commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Equity security commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Debt security commingled funds | Sep. 30, 2012 Debt security commingled funds | Sep. 30, 2013 Debt security commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Debt security commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Debt security commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Debt security commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Debt security commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Debt security commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Blended security commingled funds | Sep. 30, 2012 Blended security commingled funds | Sep. 30, 2013 Blended security commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Blended security commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Blended security commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Blended security commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Blended security commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Blended security commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Institutional mutual funds | Sep. 30, 2012 Institutional mutual funds | Sep. 30, 2013 Institutional mutual funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Institutional mutual funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Institutional mutual funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Institutional mutual funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Institutional mutual funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Institutional mutual funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Cash and cash equivalents | Sep. 30, 2012 Cash and cash equivalents | Sep. 30, 2013 Cash and cash equivalents Fair Value, Inputs, Level 1 | Sep. 30, 2012 Cash and cash equivalents Fair Value, Inputs, Level 1 | Sep. 30, 2013 Cash and cash equivalents Fair Value, Inputs, Level 2 | Sep. 30, 2012 Cash and cash equivalents Fair Value, Inputs, Level 2 | Sep. 30, 2013 Cash and cash equivalents Fair Value, Inputs, Level 3 | Sep. 30, 2012 Cash and cash equivalents Fair Value, Inputs, Level 3 | Sep. 30, 2013 Private equity funds | Sep. 30, 2012 Private equity funds | Sep. 30, 2013 Private equity funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Private equity funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Private equity funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Private equity funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Private equity funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Private equity funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Private real estate funds | Sep. 30, 2012 Private real estate funds | Sep. 30, 2013 Private real estate funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Private real estate funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Private real estate funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Private real estate funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Private real estate funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Private real estate funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral | Sep. 30, 2012 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral | Sep. 30, 2013 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral Fair Value, Inputs, Level 1 | Sep. 30, 2012 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral Fair Value, Inputs, Level 1 | Sep. 30, 2013 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral Fair Value, Inputs, Level 2 | Sep. 30, 2012 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral Fair Value, Inputs, Level 2 | Sep. 30, 2013 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral Fair Value, Inputs, Level 3 | Sep. 30, 2012 Treasury bills, U.S. Government notes and securities held as futures and other derivative collateral Fair Value, Inputs, Level 3 | Sep. 30, 2013 Securities lending commingled funds | Sep. 30, 2012 Securities lending commingled funds | Sep. 30, 2013 Securities lending commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2012 Securities lending commingled funds Fair Value, Inputs, Level 1 | Sep. 30, 2013 Securities lending commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2012 Securities lending commingled funds Fair Value, Inputs, Level 2 | Sep. 30, 2013 Securities lending commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2012 Securities lending commingled funds Fair Value, Inputs, Level 3 | Sep. 30, 2013 Foreign currency forward | Sep. 30, 2012 Foreign currency forward | Sep. 30, 2013 Foreign currency forward Fair Value, Inputs, Level 1 | Sep. 30, 2012 Foreign currency forward Fair Value, Inputs, Level 1 | Sep. 30, 2013 Foreign currency forward Fair Value, Inputs, Level 2 | Sep. 30, 2012 Foreign currency forward Fair Value, Inputs, Level 2 | Sep. 30, 2013 Foreign currency forward Fair Value, Inputs, Level 3 | Sep. 30, 2012 Foreign currency forward Fair Value, Inputs, Level 3 | Sep. 30, 2013 Interest rate swaps | Sep. 30, 2013 Interest rate swaps Fair Value, Inputs, Level 1 | Sep. 30, 2013 Interest rate swaps Fair Value, Inputs, Level 2 | Sep. 30, 2013 Interest rate swaps Fair Value, Inputs, Level 3 | Sep. 30, 2013 Options | Sep. 30, 2012 Options | Sep. 30, 2013 Options Fair Value, Inputs, Level 1 | Sep. 30, 2012 Options Fair Value, Inputs, Level 1 | Sep. 30, 2013 Options Fair Value, Inputs, Level 2 | Sep. 30, 2012 Options Fair Value, Inputs, Level 2 | Sep. 30, 2013 Options Fair Value, Inputs, Level 3 | Sep. 30, 2012 Options Fair Value, Inputs, Level 3 | Sep. 30, 2013 Futures | Sep. 30, 2012 Futures | Sep. 30, 2013 Futures Fair Value, Inputs, Level 1 | Sep. 30, 2012 Futures Fair Value, Inputs, Level 1 | Sep. 30, 2013 Futures Fair Value, Inputs, Level 2 | Sep. 30, 2012 Futures Fair Value, Inputs, Level 2 | Sep. 30, 2012 Futures Fair Value, Inputs, Level 3 | Sep. 30, 2013 Credit default swaps | Sep. 30, 2012 Credit default swaps | Sep. 30, 2013 Credit default swaps Fair Value, Inputs, Level 1 | Sep. 30, 2012 Credit default swaps Fair Value, Inputs, Level 1 | Sep. 30, 2013 Credit default swaps Fair Value, Inputs, Level 2 | Sep. 30, 2012 Credit default swaps Fair Value, Inputs, Level 2 | Sep. 30, 2013 Credit default swaps Fair Value, Inputs, Level 3 | Sep. 30, 2012 Credit default swaps Fair Value, Inputs, Level 3 | Sep. 30, 2013 Minimum Number_of_extensions Years | Sep. 30, 2013 Maximum Years Number_of_extensions
Defined Benefit Plan Disclosure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of gross plan assets | $ 7,951 | [1],[2] | $ 7,666 | [1],[3] | $ 1,855 | $ 1,530 | $ 5,440 | $ 5,503 | $ 656 | $ 633 | $ 813 | $ 1,689 | [1],[2] | $ 1,294 | [1],[3] | $ 1,686 | $ 1,293 | $ 0 | $ 0 | $ 3 | $ 1 | $ 22 | [1],[2] | $ 26 | [1],[3] | $ 17 | $ 18 | $ 0 | $ 3 | $ 5 | $ 5 | $ 1,352 | [1],[2] | $ 1,601 | [1],[3] | $ 0 | $ 0 | $ 1,334 | $ 1,589 | $ 18 | $ 12 | $ 355 | [1],[2] | $ 390 | [1],[3] | $ 0 | $ 0 | $ 352 | $ 386 | $ 3 | $ 4 | $ 113 | [1],[2] | $ 184 | [1],[3] | $ 113 | $ 182 | $ 0 | $ 2 | $ 0 | $ 0 | $ 31 | [1],[2] | $ 46 | [1],[3] | $ 0 | $ 0 | $ 30 | $ 43 | $ 1 | $ 3 | $ 120 | [1],[2] | $ 109 | [1],[3] | $ 0 | $ 0 | $ 110 | $ 95 | $ 10 | $ 14 | $ 36 | [1],[2] | $ 46 | [1],[3] | $ 0 | $ 0 | $ 36 | $ 41 | $ 0 | $ 5 | $ 21 | [1],[2] | $ 28 | [1],[3] | $ 0 | $ 0 | $ 18 | $ 28 | $ 3 | $ 0 | $ 1,182 | [1],[2] | $ 1,129 | [1],[3] | $ 0 | $ 0 | $ 1,182 | $ 1,129 | $ 0 | $ 0 | $ 786 | [1],[2] | $ 802 | [1],[3] | $ 0 | $ 0 | $ 786 | $ 802 | $ 0 | $ 0 | $ 263 | [1],[2] | $ 275 | [1],[3] | $ 0 | $ 0 | $ 263 | $ 275 | $ 0 | $ 0 | $ 26 | [1],[2] | $ 32 | [1],[3] | $ 26 | $ 32 | $ 0 | $ 0 | $ 0 | $ 0 | $ 395 | [1],[2] | $ 311 | [1],[3] | $ 1 | $ 0 | $ 394 | $ 311 | $ 0 | $ 0 | $ 528 | [1],[2] | $ 519 | [1],[3] | $ 0 | $ 0 | $ 0 | $ 0 | $ 528 | $ 519 | $ 382 | [1],[2] | $ 340 | [1],[3] | $ 0 | $ 0 | $ 297 | $ 270 | $ 85 | $ 70 | $ 39 | [1],[2] | $ 37 | [1],[3] | $ 8 | $ 5 | $ 31 | $ 32 | $ 0 | $ 0 | $ 3 | [1],[2] | $ 3 | [1],[3] | $ 0 | $ 0 | $ 3 | $ 3 | $ 0 | $ 0 | $ 594 | [1],[2] | $ 487 | [1],[3] | $ 0 | $ 0 | $ 594 | $ 487 | $ 0 | $ 0 | $ 4 | [1],[2] | $ 0 | $ 4 | $ 0 | $ 6 | [1],[2] | $ 7 | [1],[3] | $ 0 | $ 0 | $ 6 | $ 7 | $ 0 | $ 0 | $ 4 | [1],[2] |  |  | $ 4 |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities | 596 | [1],[2] | 493 | [1],[3] | 0 | 3 | 596 | 490 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 594 | [1],[2] | 488 | [1],[3] | 0 | 0 | 594 | 488 | 0 | 0 |  |  |  |  |  | 1 | [1],[2] | 1 | [1],[3] | 0 | 0 | 1 | 1 | 0 | 0 |  |  | 3 | [1],[3] |  | 3 |  | 0 | 0 | 1 | [1],[2] | 1 | [1],[3] | 0 | 0 | 1 | 1 | 0 | 0 |  |
Net payables | 131 |  | 141 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payables for collateral on loaned securities | $ 3 |  | $ 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inter-vendor pricing variance | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years partnerships in private equity generally continue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 12
Number of one year extensions for partnerships in private equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 4
Voting percentage required to desolve partnership in private equity | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Excludes a $3 million payable for collateral on loaned securities in connection with TVARS’s participation in securities lending programs.
[2] | Excludes approximately $131 million in net payables associated with security purchases and sales and various other payables.
[3] | Excludes approximately $141 million in net payables associated with security purchases and sales and various other payables

X
- Definition Fair value of liabilities as of the measurement date resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements. These liabilities have been segregated and restricted (usually in a trust) for the purpose of defined benefit plan benefits. + References No definition available. + Details
Name: | tve_DefinedBenefitPlanFairValueOfPlanDerivativeLiabilities
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. This amount is not reduced by non-benefit liabilities. + References No definition available. + Details
Name: | tve_FairValuePlanAssetsGross
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The inter-vendor pricing variance identified in an automated inter-source tolerance report used to varify the validity of monthly vendor provided pricing for pension plan assets. + References No definition available. + Details
Name: | tve_InterVendorPricingVariance
Namespace Prefix: | tve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net payables associated with security purchases and sales and various other payables. + References No definition available. + Details
Name: | tve_NetPayables
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of one year extensions for partnerships in private equity stated in a range. + References No definition available. + Details
Name: | tve_Numberofoneyearextensionsforpartnershipsinprivateequity
Namespace Prefix: | tve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of years partnerships in private equity generally continue stated in a range. + References No definition available. + Details
Name: | tve_Numberofyearspartnershipsinprivateequitygenerallycontinue
Namespace Prefix: | tve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payables for collateral on loaned securities in connection with retirement system participation in securities lending program. + References No definition available. + Details
Name: | tve_PayablesForCollateralOnLoanedSecurities
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The voting percentage required to desolve a partnership in private equity. + References No definition available. + Details
Name: | tve_Votingpercentagerequiredtodesolvepartnershipinprivateequity
Namespace Prefix: | tve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration