Business Segment and Geographic Information (Narrative) (Details)
$ in Millions |
3 Months Ended |
9 Months Ended |
12 Months Ended |
|
Jun. 30, 2017
USD ($)
|
Jun. 30, 2016
USD ($)
|
Sep. 30, 2017
USD ($)
Division
Countries
Customers
|
Dec. 31, 2016
USD ($)
Countries
Customers
|
| Concentration Risk [Line Items] |
|
|
|
|
| Number of business segments | Division |
|
|
2
|
|
| Maximum Percentage Gross Trade Receivables From One Geographic Segment |
|
|
10.00%
|
10.00%
|
| Maximum Percentage Gross Trade Receivables From One Customer |
|
|
10.00%
|
10.00%
|
| Number of Countries Exceed Receivables Threshold | Countries |
|
|
1
|
2
|
| Number of Customers Exceed Receivables Threshold | Customers |
|
|
0
|
0
|
| Venezuela trade receivables exchanged for promissory note |
$ 375
|
$ 200
|
|
|
| Pre-tax loss on promissory note |
$ 262
|
148
|
|
|
| Promissory note fair value |
|
$ 52
|
$ 116
|
$ 70
|
| VENEZUELA |
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
| Collections on receivables |
|
|
600
|
|
| Accounts Receivable, Gross |
|
|
429
|
$ 610
|
| Accounts Receivable, Gross, Noncurrent |
|
|
$ 267
|
|
| 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 |
|
|
43.00%
|
28.00%
|