Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	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