Assets and Liabilities, at Fair Value (Tables)

12 Months Ended

Sep. 30, 2012

Assets and Liabilities, at Fair Value [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]



	September 30, 2012
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Money market funds	$	0.1	$	—	$	—	$	—		$	0.1
Certificate of deposits	10.4		—		—		—			10.4
Unrestricted cash equivalents	10.5		—		—		—			10.5
Commodities warehouse receipts	22.3		—		—		—			22.3
U.S. government obligations	—		50.5		—		—			50.5
Securities and other assets segregated under federal and other regulations	22.3		50.5		—		—			72.8
Money market funds	335.1		—		—		—			335.1
U.S. government obligations	—		1,318.3		—		—			1,318.3
Mortgage-backed securities	—		7.0		—		—			7.0
Derivatives	3,344.3		—		—		(3,494.7		)	(150.4		)
Deposits and receivables from exchange-clearing organizations	3,679.4		1,325.3		—		(3,494.7		)	1,510.0
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	0.7		5.0		—		(6.4		)	(0.7		)
Common and preferred stock and American Depositary Receipts ("ADRs")	17.8		5.6		0.9		—			24.3
Exchangeable foreign ordinary equities and ADRs	10.0		—		—		—			10.0
Corporate and municipal bonds	0.3		0.6		3.6		—			4.5
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	14.8		—		—		—			14.8
Derivatives	315.6		785.3		—		(1,047.0		)	53.9
Commodities leases	—		135.2		—		(93.1		)	42.1
Commodities warehouse receipts	7.5		—		—		—			7.5
Exchange firm common stock	3.4		9.0		—		—			12.4
Mutual funds and other	1.9		—		—		—			1.9
Financial instruments owned	371.3		936.0		4.5		(1,140.1		)	171.7
Total assets at fair value	$	4,084.2	$	2,316.8	$	4.5	$	(4,641.2	)	$	1,764.3
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	14.8	$	—		$	14.8
Payables to customers - derivatives	3,562.3		—		—		(3,562.3		)	—
Common and preferred stock and ADRs	16.4		5.9		—		—			22.3
Exchangeable foreign ordinary equities and ADRs	5.7		—		—		—			5.7
Derivatives	338.1		775.2		—		(1,068.7		)	44.6
Commodities leases	—		220.0		—		(117.2		)	102.8
Financial instruments sold, not yet purchased	360.2		1,001.1		—		(1,185.9		)	175.4
Total liabilities at fair value	$	3,922.5	$	1,001.1	$	14.8	$	(4,748.2	)	$	190.2


(1)	Represents cash collateral and the impact of netting across the levels of the fair value hierarchy. Netting among positions classified within the same level are included in that level.



	September 30, 2011
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Money market funds	$	0.1	$	—	$	—	$	—		$	0.1
Certificate of deposits	12.6		—		—		—			12.6
Unrestricted cash equivalents	12.7		—		—		—			12.7
Commodities warehouse receipts	19.0		—		—		—			19.0
U.S. government obligations	—		3.7		—		—			3.7
Securities and other assets segregated under federal and other regulations	19.0		3.7		—		—			22.7
Money market funds	1,193.5		—		—		—			1,193.5
U.S. government obligations	—		470.5		—		—			470.5
Mortgage-backed securities	—		8.5		—		—			8.5
Derivatives	7,227.4		—		—		(7,491.7		)	(264.3		)
Deposits and receivables from exchange-clearing organizations	8,420.9		479.0		—		(7,491.7		)	1,408.2
U.S. government obligations	—		0.1		—		—			0.1
Derivatives	47.3		1,073.5		—		(1,104.7		)	16.1
Deposits and receivables from broker-dealers, clearing organizations and counterparties	47.3		1,073.6		—		(1,104.7		)	16.2
Common and preferred stock and ADRs	45.6		0.2		1.1		—			46.9
Exchangeable foreign ordinary equities and ADRs	7.8		2.0		—		—			9.8
Corporate and municipal bonds	—		5.1		3.6		—			8.7
U.S. government obligations	—		0.8		—		—			0.8
Foreign government obligations	5.8		0.9		—		—			6.7
Derivatives	210.5		557.6		—		(666.2		)	101.9
Commodities leases	—		66.3		—		(40.2		)	26.1
Commodities warehouse receipts	16.2		—		—		—			16.2
Exchange firm common stock	3.0		0.7		—		—			3.7
Mutual funds and other	0.6		—		0.4		—			1.0
Investment in managed funds	—		1.3		—		—			1.3
Financial instruments owned	289.5		634.9		5.1		(706.4		)	223.1
Total assets at fair value	$	8,789.4	$	2,191.2	$	5.1	$	(9,302.8	)	$	1,682.9
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	22.3	$	—		$	22.3
Payables to customers - derivatives	6,234.7		—		—		(6,234.7		)	—
Common and preferred stock and ADRs	23.4		—		—		—			23.4
Exchangeable foreign ordinary equities and ADRs	21.5		2.3		—		—			23.8
Derivatives	219.9		1,679.1		—		(1,776.1		)	122.9
Commodities leases	—		431.9		—		(211.1		)	220.8
Financial instruments sold, not yet purchased	264.8		2,113.3		—		(1,987.2		)	390.9
Total liabilities at fair value	$	6,499.5	$	2,113.3	$	22.3	$	(8,221.9	)	$	413.2

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The Company’s financial assets at fair value classified within level 3 of the fair value hierarchy as of September 30, 2012 and 2011 are summarized below:



(in millions)	September 30, 2012			September 30, 2011
Total level 3 assets	$	4.5		$	5.1
Level 3 assets for which the Company bears economic exposure	$	4.5		$	5.1
Total assets	$	2,958.9		$	2,635.7
Total financial assets at fair value	$	1,764.3		$	1,682.9
Total level 3 assets as a percentage of total assets	0.2		%	0.2		%
Level 3 assets for which the Company bears economic exposure as a percentage of total assets	0.2		%	0.2		%
Total level 3 assets as a percentage of total financial assets at fair value	0.3		%	0.3		%

The following tables set forth a summary of changes in the fair value of the Company’s level 3 financial assets and liabilities during the fiscal years ended September 30, 2012 and 2011, including a summary of unrealized gains (losses) during the fiscal year ended on the Company’s level 3 financial assets and liabilities still held as of September 30, 2012.



	Level 3 Financial Assets and Financial Liabilities For the Year Ended September 30, 2012
(in millions)	Balances at beginning of period		Realized gains (losses) during period			Unrealized gains (losses) during period			Purchases/ issuances		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Assets:
Common and preferred stock and ADRs	$	1.1	$	—		$	(0.2	)	$	—	$	—		$	—	$	0.9
Corporate and municipal bonds	3.6		—			—			—		—			—		3.6
Mutual funds and other	0.4		(0.4		)	—			—		—			—		—
	$	5.1	$	(0.4	)	$	(0.2	)	$	—	$	—		$	—	$	4.5
Liabilities:
Contingent liabilities	$	22.3	$	—		$	2.0		$	0.1	$	(9.6	)	$	—	$	14.8



	Level 3 Financial Assets and Financial Liabilities For the Year Ended September 30, 2011
(in millions)	Balances at beginning of period		Realized gains (losses) during period		Unrealized gains (losses) during period			Purchases/ issuances		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Assets:
Common and preferred stock and ADRs	$	1.2	$	—	$	(0.1	)	$	—	$	—		$	—	$	1.1
Corporate and municipal bonds	8.0		—		(1.7		)	—		(2.7		)	—		3.6
Mutual funds and other	0.4		—		—			—		—			—		0.4
Investment in managed funds	0.6		0.2		—			—		(0.8		)	—		—
	$	10.2	$	0.2	$	(1.8	)	$	—	$	(3.5	)	$	—	$	5.1
Liabilities:
Contingent liabilities	$	32.3	$	—	$	(2.9	)	$	2.3	$	(9.4	)	$	—	$	22.3

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]



	September 30, 2012
(in millions)	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	—	$	0.4	$	—	$	0.4
Fixed income:
Government and agencies	—		0.8		—		0.8
Collective funds:
Fixed income	—		7.7		—		7.7
Equities	—		16.6		—		16.6
Real estate	—		1.0		—		1.0
Total	$	—	$	26.5	$	—	$	26.5



	September 30, 2011
(in millions)	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	—	$	0.5	$	—	$	0.5
Fixed income:
Government and agencies	—		0.9		—		0.9
Mutual funds	0.2		—		—		0.2
Collective funds:
Fixed income	—		6.0		—		6.0
Equities	—		15.5		—		15.5
Real estate	—		1.7		—		1.7
Total	$	0.2	$	24.6	$	—	$	24.8

Available-for-sale Securities [Table Text Block]

The following tables summarize the amortized cost basis, the aggregate fair value and gross unrealized holding gains and losses of the Company’s investment securities classified as available-for-sale as of September 30, 2012 and September 30, 2011:



September 30, 2012
Amounts included in deposits with and receivables from exchange-clearing organizations:
	Amortized Cost		Unrealized Holding ⁽¹⁾				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	1,298.9	$	—	$	—	$	1,298.9
Mortgage-backed securities	6.8		0.1		—		6.9
	$	1,305.7	$	0.1	$	—	$	1,305.8


(1)	Unrealized gain/loss on U.S. government obligations as of September 30, 2012, is less than 0.1 million .



September 30, 2011
Amounts included in financial instruments owned:
	Amortized Cost		Unrealized Holding ⁽¹⁾				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	0.5	$	—	$	—	$	0.5
Corporate bonds	5.0		—		—		5.0
	$	5.5	$	—	$	—	$	5.5


(1)	Unrealized gain/loss on financial instruments owned as of September 30, 2011, is less than $0.1 million.



Amounts included in deposits with and receivables from exchange-clearing organizations:
	Amortized Cost		Unrealized Holding				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	440.6	$	0.1	$	—	$	440.7
Mortgage-backed securities	8.3		0.2		—		8.5
	$	448.9	$	0.3	$	—	$	449.2

As of September 30, 2012 and September 30, 2011, investments in debt securities classified as available-for-sale (AFS) mature as follows:



September 30, 2012
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	1,298.9	$	—	$	1,298.9
Mortgage-backed securities	—		6.9		6.9
	$	1,298.9	$	6.9	$	1,305.8



September 30, 2011
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	441.2	$	—	$	441.2
Corporate bonds	5.0		—		5.0
Mortgage-backed securities	—		8.5		8.5
	$	446.2	$	8.5	$	454.7

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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