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Employee Benefit Plans, Fair Value of Assets Qualified Plans (Details) (USD $) In Millions, unless otherwise specified |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Other US Companies [Member] | Dec. 31, 2012 Other US Companies [Member] | Dec. 31, 2013 Other US Companies [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Other US Companies [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Other US Companies [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Other US Companies [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Other US Companies [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Other US Companies [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 International Companies [Member] | Dec. 31, 2012 International Companies [Member] | Dec. 31, 2013 International Companies [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 International Companies [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 International Companies [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 International Companies [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 International Companies [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 International Companies [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Preferred Stock [Member] | Dec. 31, 2012 Preferred Stock [Member] | Dec. 31, 2013 Preferred Stock [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Preferred Stock [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Preferred Stock [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Preferred Stock [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Preferred Stock [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Preferred Stock [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 International Growth [Member] | Dec. 31, 2012 International Growth [Member] | Dec. 31, 2013 International Growth [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 International Growth [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 International Growth [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 International Growth [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 International Growth [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 International Growth [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Index Funds [Member] | Dec. 31, 2012 Index Funds [Member] | Dec. 31, 2013 Index Funds [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Index Funds [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Index Funds [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Index Funds [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Index Funds [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Index Funds [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Corporate Debt Instruments [Member] | Dec. 31, 2012 Corporate Debt Instruments [Member] | Dec. 31, 2013 Corporate Debt Instruments [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Corporate Debt Instruments [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Corporate Debt Instruments [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Corporate Debt Instruments [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Corporate Debt Instruments [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Corporate Debt Instruments [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 US Treasury Securities [Member] | Dec. 31, 2012 US Treasury Securities [Member] | Dec. 31, 2013 US Treasury Securities [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 US Treasury Securities [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 US Treasury Securities [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 US Treasury Securities [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 US Treasury Securities [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 US Treasury Securities [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Other Government Securities [Member] | Dec. 31, 2012 Other Government Securities [Member] | Dec. 31, 2013 Other Government Securities [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Other Government Securities [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Other Government Securities [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Other Government Securities [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Other Government Securities [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Other Government Securities [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Common Collective Trusts [Member] | Dec. 31, 2012 Common Collective Trusts [Member] | Dec. 31, 2013 Common Collective Trusts [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Common Collective Trusts [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Common Collective Trusts [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Common Collective Trusts [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Common Collective Trusts [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Common Collective Trusts [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Private Fund [Member] | Dec. 31, 2013 Private Fund [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Private Fund [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Private Fund [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Insurance Contracts [Member] | Dec. 31, 2012 Insurance Contracts [Member] | Dec. 31, 2013 Insurance Contracts [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Insurance Contracts [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Insurance Contracts [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Insurance Contracts [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Insurance Contracts [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Insurance Contracts [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Interest and Dividends Receivable [Member] | Dec. 31, 2012 Interest and Dividends Receivable [Member] | Dec. 31, 2013 Interest and Dividends Receivable [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Interest and Dividends Receivable [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Interest and Dividends Receivable [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Interest and Dividends Receivable [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Interest and Dividends Receivable [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Interest and Dividends Receivable [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Cash and Cash Equivalents [Member] | Dec. 31, 2012 Cash and Cash Equivalents [Member] | Dec. 31, 2013 Cash and Cash Equivalents [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Cash and Cash Equivalents [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2013 Cash and Cash Equivalents [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Cash and Cash Equivalents [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2013 Cash and Cash Equivalents [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Cash and Cash Equivalents [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Equity Securities [Member] | Dec. 31, 2013 Debt Securities [Member]
Fair Values of Qualified Pension Plan Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of qualified pension plan assets | $ 1,909 | $ 1,729 | $ 1,136 | $ 1,035 | $ 773 | $ 694 | $ 0 | $ 0 | $ 529 | [1] | $ 441 | [1] | $ 529 | [1] | $ 441 | [1] | $ 0 | [1] | $ 0 | [1] | $ 0 | [1] | $ 0 | [1] | $ 155 | $ 135 | $ 155 | $ 135 | $ 0 | $ 0 | $ 0 | $ 0 | $ 3 | $ 3 | $ 3 | $ 2 | $ 0 | $ 1 | $ 0 | $ 0 | $ 131 | $ 127 | $ 131 | $ 127 | $ 0 | $ 0 | $ 0 | $ 0 | $ 160 | [2] | $ 117 | [2] | $ 160 | [2] | $ 117 | [2] | $ 0 | [2] | $ 0 | [2] | $ 0 | [2] | $ 0 | [2] | $ 260 | $ 290 | $ 0 | $ 0 | $ 260 | $ 290 | $ 0 | $ 0 | $ 81 | $ 107 | $ 81 | $ 107 | $ 0 | $ 0 | $ 0 | $ 0 | $ 79 | $ 68 | $ 0 | $ 3 | $ 79 | $ 65 | $ 0 | $ 0 | $ 373 | $ 294 | $ 0 | $ 0 | $ 373 | $ 294 | $ 0 | $ 0 | $ 38 | $ 0 | $ 38 | $ 0 | $ 17 | $ 17 | $ 0 | $ 0 | $ 17 | $ 17 | $ 0 | $ 0 | $ 5 | $ 5 | $ 5 | $ 5 | $ 0 | $ 0 | $ 0 | $ 0 | $ 78 | $ 125 | $ 72 | $ 98 | $ 6 | $ 27 | $ 0 | $ 0 |  |
Employee Benefit Plans (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, actual plan asset allocations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% | 40.00%
Percentage of equity securities in target allocations for plan assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70.00% | 30.00%
[1] | Equity securities are held in a wide range of industrial sectors, including consumer goods, information technology, healthcare, industrials, and financial services.
[2] | This class includes primarily investments in approximately 60 percent equities and 40 percent bonds.

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- 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. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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