CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Statement of Stockholders' Equity [Abstract]
Net (loss) income	$ (69.0)	$ 110.7	$ 7.3
Other comprehensive (loss) income:
Foreign currency translation losses	(6.6)	(8.6)	(10.6)
Net unrealized (loss) gain on derivative instruments
Changes in derivative instruments before reclassification adjustment	(2.0)	(1.8)	(6.0)
Net reclassification adjustment for (gains) losses included in net income	(0.9)	3.1	13.4
Changes in derivative instruments after reclassification adjustment	(2.9)	1.3	7.4
Changes in deferred income tax asset/liability	(0.2)	(0.7)	(2.7)
Deferred tax valuation allowance adjustments	0.6	0.9	(0.3)
Net unrealized (loss) gain on derivative instruments	(2.5)	1.5	4.4
Actuarial adjustments to pension plans
Changes in actuarial adjustments before reclassification adjustment	9.6	(15.4)	(7.6)
Net reclassification adjustment for losses included in cost of goods sold	1.6	0.9
Net reclassification adjustment for gains included in selling and general and administrative expenses	(0.2)
Changes in actuarial adjustments to pension plans	11.0	(14.5)	(7.6)
Changes in deferred income tax asset/liability	(5.1)	3.6	2.0
Deferred tax valuation allowance adjustments	(0.1)	(0.8)	3.5
Net actuarial adjustments to pension plans	5.8	(11.7)	(2.1)
Unrealized investment (losses) gains:
Changes in unrealized investment (losses) gains before reclassification adjustment	(490.5)	906.5	420.9
Net reclassification adjustment for gains included in net income	(333.4)	(263.9)	(3.9)
Changes in unrealized investment (losses) gains after reclassification adjustment	(823.9)	642.6	417.0
Adjustments to intangible assets	327.3	(218.5)	(172.0)
Changes in deferred income tax asset/liability	173.1	(148.5)	(85.7)
Net unrealized (loss) gain on investments	(323.5)	275.6	159.3
Non-credit related other-than-temporary impairment:
Changes in non-credit related other-than-temporary impairment		(1.5)	0.5
Adjustments to intangible assets		0.6	(0.2)
Changes in deferred income tax asset/liability	0	0.3	(0.1)
Net change to derive comprehensive (loss) income for the period		(0.6)	0.2
Net change to derive comprehensive (loss) income for the period	(326.8)	256.2	151.2
Comprehensive (loss) income	(395.8)	366.9	158.5
Less: Comprehensive (loss) income attributable to the noncontrolling interest:
Net (loss) income	(23.2)	21.2	(34.7)
Other comprehensive loss	(2.2)	(8.6)	(3.7)
Total comprehensive income (loss)	(25.4)	12.6	(38.4)
Comprehensive (loss) income attributable to the controlling interest	$ (370.4)	$ 354.3	$ 196.9