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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Summary of Significant Accounting Policies [Line Items] |  |  |
SICAD 2 pre-tax charge |  |  | $ 58
SIMADI pre-tax charge |  | $ 3 |
Minimum [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Marketable securities, maturity timing in months | 3 months |  |
Definite-lived intangible assets, useful life | 1 year |  |
Minimum [Member] | Equipment and Buildings [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 15 years |  |
Minimum [Member] | Computer Software, Intangible Asset [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 5 years |  |
Maximum [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Cash, maturity timing in months | 3 months |  |
Marketable securities, maturity timing in months | 12 months |  |
Definite-lived intangible assets, useful life | 20 years |  |
Maximum [Member] | Equipment and Buildings [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 25 years |  |
Maximum [Member] | Computer Software, Intangible Asset [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 7 years |  |
Accounting Standards Update 2015-17 [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Deferred Tax Assets, Net, Current |  | 368 |
Deferred Tax Liabilities, Net, Current |  | $ 37 |

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, netted by jurisdiction and classified as current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31917-109318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31931-109318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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