XML 39 R28.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Revenues (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Revenue From Contract With Customer [Abstract] |
Schedule of Change In Customer Advances Balance | The table below shows the change in the customer advances balance for the three months ended March 31, 2018 ($ in millions).
|  | Customer Advances Balance as of January 1, 2018 |  |  | Cash Received in Advance of Satisfying Performance Obligation |  |  | Revenue Recognized |  |  | Customer Advances Balance as of March 31, 2018 |
Total |  | $ | 12.7 |  |  | $ | 26.3 |  |  | $ | 24.6 |  |  | $ | 14.4 |

X
- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
Name: | us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration