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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Cash and Cash Equivalents
|
Dec. 31, 2011
Cash and Cash Equivalents
|
Dec. 31, 2012
Fair Value, Inputs, Level 1
|
Dec. 31, 2011
Fair Value, Inputs, Level 1
|
Dec. 31, 2012
Fair Value, Inputs, Level 1
Cash and Cash Equivalents
|
Dec. 31, 2011
Fair Value, Inputs, Level 1
Cash and Cash Equivalents
|
Dec. 31, 2012
Fair Value, Inputs, Level 2
|
Dec. 31, 2011
Fair Value, Inputs, Level 2
|
Dec. 31, 2012
Fair Value, Inputs, Level 2
Cash and Cash Equivalents
|
Dec. 31, 2011
Fair Value, Inputs, Level 2
Cash and Cash Equivalents
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
|
Dec. 31, 2010
Fair Value, Inputs, Level 3
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
Cash and Cash Equivalents
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
Cash and Cash Equivalents
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
Global Bonds
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
Global Bonds
|
Dec. 31, 2010
Fair Value, Inputs, Level 3
Global Bonds
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
Hedge Funds
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
Hedge Funds
|
Dec. 31, 2010
Fair Value, Inputs, Level 3
Hedge Funds
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
Other(2)
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
Other(2)
|
Dec. 31, 2010
Fair Value, Inputs, Level 3
Other(2)
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
Structured Products(1)
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
Structured Products(1)
|
Dec. 31, 2010
Fair Value, Inputs, Level 3
Structured Products(1)
|
Dec. 31, 2012
Fair Value, Inputs, Level 3
Other
|
Dec. 31, 2011
Fair Value, Inputs, Level 3
Other
|
Dec. 31, 2010
Fair Value, Inputs, Level 3
Other
|
Dec. 31, 2012
U.S. Postretirement Medical Benefits
|
Dec. 31, 2011
U.S. Postretirement Medical Benefits
|
Dec. 31, 2012
Equity Securities
|
Dec. 31, 2011
Equity Securities
|
Dec. 31, 2012
Equity Securities
U.S. Large Cap
|
Dec. 31, 2011
Equity Securities
U.S. Large Cap
|
Dec. 31, 2012
Equity Securities
U.S. Small Cap
|
Dec. 31, 2011
Equity Securities
U.S. Small Cap
|
Dec. 31, 2012
Equity Securities
Emerging Markets
|
Dec. 31, 2011
Equity Securities
Emerging Markets
|
Dec. 31, 2012
Equity Securities
Global Equity
|
Dec. 31, 2011
Equity Securities
Global Equity
|
Dec. 31, 2012
Equity Securities
International Equity
|
Dec. 31, 2011
Equity Securities
International Equity
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 1
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 1
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 1
U.S. Large Cap
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 1
U.S. Large Cap
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 1
U.S. Small Cap
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 1
U.S. Small Cap
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 1
Emerging Markets
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 1
Emerging Markets
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 1
Global Equity
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 1
Global Equity
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 1
International Equity
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 1
International Equity
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 2
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 2
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 2
U.S. Large Cap
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 2
U.S. Large Cap
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 2
U.S. Small Cap
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 2
U.S. Small Cap
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 2
Emerging Markets
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 2
Emerging Markets
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 2
Global Equity
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 2
Global Equity
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 2
International Equity
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 2
International Equity
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 3
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 3
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 3
U.S. Large Cap
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 3
U.S. Large Cap
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 3
U.S. Small Cap
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 3
U.S. Small Cap
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 3
Emerging Markets
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 3
Emerging Markets
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 3
Global Equity
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 3
Global Equity
|
Dec. 31, 2012
Equity Securities
Fair Value, Inputs, Level 3
International Equity
|
Dec. 31, 2011
Equity Securities
Fair Value, Inputs, Level 3
International Equity
|
Dec. 31, 2012
Fixed Income Securities
|
Dec. 31, 2011
Fixed Income Securities
|
Dec. 31, 2012
Fixed Income Securities
Global Equity
|
Dec. 31, 2011
Fixed Income Securities
Global Equity
|
Dec. 31, 2012
Fixed Income Securities
U.S. Government Securities
|
Dec. 31, 2011
Fixed Income Securities
U.S. Government Securities
|
Dec. 31, 2012
Fixed Income Securities
Global Bonds
|
Dec. 31, 2011
Fixed Income Securities
Global Bonds
|
Dec. 31, 2012
Fixed Income Securities
Municipal Bonds
|
Dec. 31, 2011
Fixed Income Securities
Municipal Bonds
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 1
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 1
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 1
Global Equity
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 1
Global Equity
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 1
U.S. Government Securities
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 1
U.S. Government Securities
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 1
Global Bonds
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 1
Global Bonds
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 1
Municipal Bonds
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 1
Municipal Bonds
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 2
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 2
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 2
Global Equity
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 2
Global Equity
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 2
U.S. Government Securities
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 2
U.S. Government Securities
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 2
Global Bonds
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 2
Global Bonds
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 2
Municipal Bonds
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 2
Municipal Bonds
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 3
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 3
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 3
Global Equity
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 3
Global Equity
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 3
U.S. Government Securities
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 3
U.S. Government Securities
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 3
Global Bonds
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 3
Global Bonds
|
Dec. 31, 2012
Fixed Income Securities
Fair Value, Inputs, Level 3
Municipal Bonds
|
Dec. 31, 2011
Fixed Income Securities
Fair Value, Inputs, Level 3
Municipal Bonds
|
Dec. 31, 2012
Other Investments
Hedge Funds
|
Dec. 31, 2011
Other Investments
Hedge Funds
|
Dec. 31, 2012
Other Investments
Other(2)
|
Dec. 31, 2011
Other Investments
Other(2)
|
Dec. 31, 2012
Other Investments
Structured Products(1)
|
Dec. 31, 2011
Other Investments
Structured Products(1)
|
Dec. 31, 2012
Other Investments
Structured Products
|
Dec. 31, 2011
Other Investments
Structured Products
|
Dec. 31, 2012
Other Investments
Other
|
Dec. 31, 2011
Other Investments
Other
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 1
Hedge Funds
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 1
Hedge Funds
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 1
Other(2)
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 1
Other(2)
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 1
Structured Products(1)
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 1
Structured Products(1)
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 1
Structured Products
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 1
Other
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 1
Other
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 2
Hedge Funds
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 2
Hedge Funds
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 2
Other(2)
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 2
Other(2)
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 2
Structured Products(1)
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 2
Structured Products(1)
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 2
Structured Products
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 2
Other
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 2
Other
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 3
Hedge Funds
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 3
Hedge Funds
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 3
Other(2)
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 3
Other(2)
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 3
Structured Products(1)
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 3
Structured Products(1)
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 3
Structured Products
|
Dec. 31, 2012
Other Investments
Fair Value, Inputs, Level 3
Other
|
Dec. 31, 2011
Other Investments
Fair Value, Inputs, Level 3
Other
|
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| Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair value of plan assets | $ 25,401 | $ 22,837 | $ 242 | $ 75 | $ 11,139 | $ 9,074 | $ 103 | $ 74 | $ 7,478 | $ 8,638 | $ 139 | $ 1 | $ 6,784 | $ 5,125 | $ 4,314 | $ 0 | $ 0 | $ 138 | $ 80 | $ 193 | $ 2,829 | $ 2,132 | $ 1,765 | $ 1,416 | $ 1,354 | $ 1,309 | $ 1,039 | $ 948 | $ 789 | $ 1,362 | $ 611 | $ 258 | $ 460 | $ 174 | $ 9,852 | $ 9,282 | $ 4,710 | $ 4,724 | $ 481 | $ 733 | $ 1,283 | $ 797 | $ 2,242 | $ 1,127 | $ 1,136 | $ 1,901 | $ 6,842 | $ 5,428 | $ 2,548 | $ 2,264 | $ 450 | $ 706 | $ 1,160 | $ 533 | $ 2,242 | $ 1,115 | $ 442 | $ 810 | $ 3,010 | $ 3,854 | $ 2,162 | $ 2,460 | $ 31 | $ 27 | $ 123 | $ 264 | $ 0 | $ 12 | $ 694 | $ 1,091 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 8,251 | $ 8,284 | $ 457 | $ 107 | $ 4,451 | $ 4,505 | $ 3,260 | $ 3,551 | $ 83 | $ 121 | $ 4,017 | $ 3,421 | $ 0 | $ 38 | $ 4,008 | $ 3,374 | $ 9 | $ 9 | $ 0 | $ 0 | $ 4,096 | $ 4,783 | $ 457 | $ 69 | $ 443 | $ 1,131 | $ 3,113 | $ 3,462 | $ 83 | $ 121 | $ 138 | $ 80 | $ 0 | $ 0 | $ 0 | $ 0 | $ 138 | $ 80 | $ 0 | $ 0 | $ 2,829 | $ 2,132 | $ 1,416 | $ 1,354 | $ 1,239 | $ 1,099 | $ 210 | [1] | $ 1,362 | [2] | $ 611 | [2] | $ 0 | $ 0 | $ 0 | $ 0 | $ 177 | $ 151 | $ 0 | [1] | $ 0 | [2] | $ 0 | [2] | $ 0 | $ 0 | $ 0 | $ 0 | $ 23 | $ 0 | $ 210 | [1] | $ 0 | [2] | $ 0 | [2] | $ 2,829 | $ 2,132 | $ 1,416 | $ 1,354 | $ 1,039 | $ 948 | $ 0 | [1] | $ 1,362 | [2] | $ 611 | [2] | ||||||
| Percentage of Plan Assets | 100.00% | 100.00% | 0.90% | 0.30% | 38.80% | 40.70% | 32.50% | 36.30% | 11.10% | 9.30% | 5.60% | 5.90% | 4.90% | 4.80% | 0.80% | [1] | 5.40% | [2] | 2.70% | [2] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Plan assets target allocation, Minimum | 0.00% | 0.00% | 35.00% | 35.00% | 25.00% | 20.00% | 5.00% | 5.00% | 1.00% | 1.00% | 1.00% | 1.00% | 0.00% | [1] | 0.00% | [1] | 1.00% | [2] | 1.00% | [2] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Plan assets target allocation, Maximum | 5.00% | 5.00% | 55.00% | 55.00% | 35.00% | 40.00% | 15.00% | 15.00% | 10.00% | 10.00% | 10.00% | 10.00% | 5.00% | [1] | 5.00% | [1] | 10.00% | [2] | 10.00% | [2] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Plan assets target allocation | 100.00% | 100.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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