Business Segment and Geographic Information (Narrative) (Details) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2017 USD ($) Division Countries Customers	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Division Countries Customers	Dec. 31, 2016 USD ($) Countries Customers
Concentration Risk [Line Items]
Number of business segments \| Division	2		2
Maximum Percentage Gross Trade Receivables From One Geographic Segment	10.00%		10.00%	10.00%
Maximum Percentage Gross Trade Receivables From One Customer	10.00%		10.00%	10.00%
Number of Countries Exceed Receivables Threshold \| Countries	1		1	2
Number of Customers Exceed Receivables Threshold \| Customers	0		0	0
Venezuela trade receivables exchanged for promissory note	$ 375	$ 200	$ 375
Pre-tax loss on promissory note	262	$ 148
Promissory note fair value	98		98	$ 70
VENEZUELA
Concentration Risk [Line Items]
Collections on receivables	600		600
Accounts Receivable, Gross	399		399	$ 610
Accounts Receivable, Gross, Noncurrent	$ 186		$ 186
Accounts Receivable [Member] \| VENEZUELA
Concentration Risk [Line Items]
Concentration Risk, Percentage			9.00%	15.00%
Geographic Concentration Risk [Member] \| UNITED STATES \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage			41.00%	28.00%

The maximum percentage of gross trade receivables from one customer at balance sheet date.

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- Definition

The maximum percentage of gross trade receivables from one geographic segment at balance sheet date.

+ References

No definition available.

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The number of business segments into which the company's operations are divided.

+ References

No definition available.

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Number Of Countries Exceed Receivables Threshold of 10%

+ References

No definition available.

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Number Of Customers Exceed Receivables Threshold of 10%

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- Definition

Pre-tax loss on promissory note based on recording the note at its fair market value at the date of the exchange using unobservable inputs based on pricing data points for similar assets in an illiquid market.

+ References

No definition available.

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Fair value of the promissory notes based on pricing data points for similar assets.

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No definition available.

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Outstanding Venezuela trade receivables exchanged for interest-bearing promissory note

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No definition available.

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- Definition

For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amounts due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business.

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For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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