Business Segment and Geographic Information (Reconciliation of Operating Income) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
May 01, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|||
Segment Reporting Information [Line Items] | ||||||||||||||
Change in inventory valuation method | $ 2,289.5 | $ 2,015.0 | $ 1,416.1 | |||||||||||
Facility closure | $ 0.0 | (29.0) | 0.0 | 0.0 | ||||||||||
Business separation costs | 0.0 | 0.0 | (32.5) | |||||||||||
Cost reduction and asset actions | $ 0.0 | $ (25.5) | $ 0.0 | 0.0 | (25.5) | 0.0 | (151.4) | |||||||
Goodwill and intangible asset impairment charge | 0.0 | 0.0 | (162.1) | |||||||||||
Gain on exchange of equity affiliate investments | $ 29.1 | 0.0 | 29.1 | 0.0 | 0.0 | 29.1 | 0.0 | 0.0 | ||||||
Operating income | $ 603.2 | $ 569.7 | $ 516.5 | $ 455.0 | $ 533.7 | $ 515.8 | $ 455.4 | $ 460.7 | 2,144.4 | 1,965.6 | 1,440.0 | |||
Segment Reconciling Items | ||||||||||||||
Segment Reporting Information [Line Items] | ||||||||||||||
Facility closure | (29.0) | 0.0 | 0.0 | |||||||||||
Business separation costs | 0.0 | 0.0 | (32.5) | |||||||||||
Cost reduction and asset actions | (25.5) | 0.0 | (151.4) | |||||||||||
Goodwill and intangible asset impairment charge | 0.0 | 0.0 | (162.1) | |||||||||||
Gain on exchange of equity affiliate investments | 29.1 | 0.0 | 0.0 | |||||||||||
Gain on land sale | 0.0 | 0.0 | 12.2 | |||||||||||
Segment Total | ||||||||||||||
Segment Reporting Information [Line Items] | ||||||||||||||
Operating income | [1] | 2,169.8 | 1,941.5 | 1,773.8 | ||||||||||
Change in Inventory Valuation Method | Segment Reconciling Items | ||||||||||||||
Segment Reporting Information [Line Items] | ||||||||||||||
Change in inventory valuation method | $ 0.0 | $ 24.1 | $ 0.0 | |||||||||||
|