Segment Reporting - Revenues and Operating Earnings by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 753.1	$ 700.6	$ 1,469.8	$ 1,390.6
Operating earnings	136.6	127.3	266.0	253.0
Interest expense, net	22.7	24.1	45.8	48.4
Earnings before income taxes	113.9	103.2	220.2	204.6
Commercial Aircraft
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	610.8	539.3	1,167.8	1,065.4
Operating earnings	114.6	99.7	219.3	198.1
Business Jet
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	142.3	161.3	302.0	325.2
Operating earnings	$ 22.0	$ 27.6	$ 46.7	$ 54.9

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 10
-Article 5

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The net amount of nonoperating interest income (expense).

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The net result for the period of deducting operating expenses from operating revenues.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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