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Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance, January 1 | $ 1,230 | $ 1,223 | $ 1,377
Increases: |  |  |
Current year tax positions | 124 | 51 | 77
Tax positions related to prior years | 176 | 64 | 247
Decreases: |  |  |
Tax positions related to prior years | (371) | (44) | (457)
Settlements with tax authorities | (94) | (25) | (2)
Lapse of statute of limitations | (21) | (37) | (19)
Effects of foreign currency translations | 0 | (2) | 0
Balance, December 31 | $ 1,044 | $ 1,230 | $ 1,223

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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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