Business Segment and Geographic Information (Narratives) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2013 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2013 |
|
Segment Reporting Information [Line Items] | |||||||||||
Export sales to third-party customers | $ 398.8 | $ 378.7 | $ 410.3 | ||||||||
Sales | $ 2,449.4 | $ 2,470.2 | $ 2,414.5 | $ 2,560.8 | $ 2,677.0 | $ 2,634.6 | $ 2,581.9 | $ 2,545.5 | 9,894.9 | 10,439.0 | 10,180.4 |
Industrial Gases - Global [Member] | |||||||||||
Segment Reporting Information [Line Items] | |||||||||||
Sales | 286.8 | 296.0 | 309.0 | ||||||||
Industrial Gases - Global [Member] | Intersegment Elimination [Member] | |||||||||||
Segment Reporting Information [Line Items] | |||||||||||
Sales | $ 242.8 | $ 192.4 | $ 183.9 |