Recent Accounting Pronouncements (Narrative) (Details) - ASU 2014-09 [Member] $ in Millions |
3 Months Ended |
---|---|
Mar. 31, 2018
USD ($)
| |
Net Sales [Member] | |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |
Changes in classification of amounts on adoption of new guidance | $ 2 |
Cost of Goods Sold [Member] | |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |
Changes in classification of amounts on adoption of new guidance | $ 1 |