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Derivatives and Hedging - Schedule of amounts of derivative gains (losses) recognized in the Consolidated Financial Statements (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivative [Line Items] |  |  |
Gain (loss) recognized in accumulated other comprehensive income | $ 0 | $ 0 | $ 9,000,000
Estimated pretax losses currently included within Accumulated Other Comprehensive Loss that will be reclassified to earnings in next twelve months | 12,000,000 |  |
(Loss) income on financial instruments | (14,000,000) | (24,000,000) | (15,000,000)
Not Designated as Hedging Instrument | Foreign exchange contracts |  |  |
Derivative [Line Items] |  |  |
(Loss) income on financial instruments | 200,000 | 8,000,000 | 18,000,000
Designated as Hedging Instrument | Foreign exchange contracts |  |  |
Derivative [Line Items] |  |  |
(Loss) income on financial instruments | 18,000,000 |  |
Designated as Hedging Instrument | Cash Flow Hedging | Foreign exchange contracts |  |  |
Derivative [Line Items] |  |  |
Gain (loss) recognized in accumulated other comprehensive income | (25,000,000) | (9,000,000) | (2,000,000)
Gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion) | (10,000,000) | (17,000,000) | (14,000,000)
Designated as Hedging Instrument | Cash Flow Hedging | Foreign exchange contracts | Compensation and Benefits |  |  |
Derivative [Line Items] |  |  |
Gain (loss) recognized in accumulated other comprehensive income | 8,000,000 | 4,000,000 | 11,000,000
Gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion) | 2,000,000 | 4,000,000 | (5,000,000)
Designated as Hedging Instrument | Cash Flow Hedging | Foreign exchange contracts | Other General Expenses |  |  |
Derivative [Line Items] |  |  |
Gain (loss) recognized in accumulated other comprehensive income | (13,000,000) | (3,000,000) | (3,000,000)
Gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion) | (4,000,000) | (1,000,000) | 3,000,000
Designated as Hedging Instrument | Cash Flow Hedging | Foreign exchange contracts | Interest Expense |  |  |
Derivative [Line Items] |  |  |
Gain (loss) recognized in accumulated other comprehensive income | 0 | 0 | 0
Gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion) | (1,000,000) | (9,000,000) | (10,000,000)
Designated as Hedging Instrument | Cash Flow Hedging | Foreign exchange contracts | Other Income |  |  |
Derivative [Line Items] |  |  |
Gain (loss) recognized in accumulated other comprehensive income | (20,000,000) | (10,000,000) | (10,000,000)
Gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion) | $ (7,000,000) | $ (11,000,000) | $ (2,000,000)

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- Definition Represents the estimated net amount of unrealized gains (losses) on hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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