TD Ameritrade Holding 10-Q 7 Aug 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2015	Jul. 29, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q3
Trading Symbol	AMTD
Entity Registrant Name	TD AMERITRADE HOLDING CORPORATION
Entity Central Index Key	1,173,431
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		543,180,721

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
ASSETS
Cash and cash equivalents	$ 2,233	$ 1,460
Cash and investments segregated and on deposit for regulatory purposes	4,425	5,116
Receivable from brokers, dealers and clearing organizations	1,144	1,108
Receivable from clients, net	12,868	11,639
Receivable from affiliates	107	99
Other receivables, net	141	147
Securities owned, at fair value	412	332
Property and equipment at cost, net	531	543
Goodwill	2,467	2,467
Acquired intangible assets, net	684	751
Other assets	147	169
Total assets	25,159	23,831
Liabilities:
Payable to brokers, dealers and clearing organizations	2,414	2,421
Payable to clients	15,070	14,497
Accounts payable and other liabilities	568	595
Payable to affiliates	6	5
Notes payable	0	150
Long-term debt	1,810	1,101
Deferred income taxes	298	314
Total liabilities	20,166	19,083
Stockholders’ equity:
Preferred stock, $0.01 par value; 100 million shares authorized, none issued	0	0
Common stock, $0.01 par value; one billion shares authorized; 631 million shares issued; June 30, 2015 - 543 million shares outstanding; September 30, 2014 - 545 million shares outstanding	6	6
Additional paid-in capital	1,638	1,618
Retained earnings	4,904	4,551
Treasury stock, common, at cost: June 30, 2015 - 88 million shares; September 30, 2014 - 86 million shares	(1,529)	(1,409)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(26)	(18)
Total stockholders’ equity	4,993	4,748
Total liabilities and stockholders’ equity	$ 25,159	$ 23,831

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2015	Sep. 30, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	631,000,000	631,000,000
Common stock, shares outstanding	543,000,000	545,000,000
Treasury stock, shares	88,000,000	86,000,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Transaction-based revenues:
Commissions and transaction fees	$ 328	$ 317	$ 1,036	$ 1,019
Asset-based revenues:
Interest revenue	158	150	472	426
Brokerage interest expense	(2)	(1)	(5)	(5)
Net interest revenue	156	149	467	421
Insured deposit account fees	209	202	620	612
Investment product fees	85	79	253	226
Total asset-based revenues	450	430	1,340	1,259
Other revenues	16	16	39	49
Net revenues	794	763	2,415	2,327
Operating expenses:
Employee compensation and benefits	202	189	608	565
Clearing and execution costs	36	35	108	98
Communications	31	29	92	84
Occupancy and equipment costs	40	39	121	116
Depreciation and amortization	23	24	69	71
Amortization of acquired intangible assets	22	22	67	68
Professional services	43	42	120	117
Advertising	54	48	199	205
Other	18	19	66	57
Total operating expenses	469	447	1,450	1,381
Operating income	325	316	965	946
Other expense (income):
Interest on borrowings	13	6	30	18
Gain on sale of investments	(7)	0	(7)	0
Other	0	0	1	0
Total other expense (income)	6	6	24	18
Pre-tax income	319	310	941	928
Provision for income taxes	122	120	344	352
Net income	$ 197	$ 190	$ 597	$ 576
Earnings per share - basic (in usd per share)	$ 0.36	$ 0.34	$ 1.10	$ 1.05
Earnings per share - diluted (in usd per share)	$ 0.36	$ 0.34	$ 1.09	$ 1.04
Weighted average shares outstanding - basic (in shares)	544	551	544	551
Weighted average shares outstanding - diluted (in shares)	547	555	547	555
Dividends declared per share (in usd per share)	$ 0.15	$ 0.12	$ 0.45	$ 0.86

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 197	$ 190	$ 597	$ 576
Cash flow hedging instruments:
Net unrealized loss	0	(15)	(15)	(24)
Reclassification adjustment for portion of realized loss amortized to net income	1	0	3	0
Total other comprehensive income (loss), before tax	1	(15)	(12)	(24)
Income tax effect	(1)	6	4	9
Total other comprehensive income (loss), net of tax	0	(9)	(8)	(15)
Comprehensive income	$ 197	$ 181	$ 589	$ 561

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 597	$ 576
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	69	71
Amortization of acquired intangible assets	67	68
Deferred income taxes	(11)	(5)
Gain on sale of investments	(7)	0
Stock-based compensation	27	24
Excess tax benefits on stock-based compensation	(14)	(9)
Other, net	2	0
Changes in operating assets and liabilities:
Cash and investments segregated and on deposit for regulatory purposes	691	636
Receivable from brokers, dealers and clearing organizations	(36)	33
Receivable from clients, net	(1,229)	(2,247)
Receivable from/payable to affiliates, net	(7)	2
Other receivables, net	6	9
Securities owned, at fair value	(79)	(48)
Other assets	34	(40)
Payable to brokers, dealers and clearing organizations	(7)	564
Payable to clients	573	1,082
Accounts payable and other liabilities	(33)	(64)
Net cash provided by (used in) operating activities	643	652
Cash flows from investing activities:
Purchase of property and equipment	(58)	(54)
Purchase of short-term investments	(503)	(1)
Proceeds from sale and maturity of short-term investments	501	1
Proceeds from sale of investments	10	13
Other	3	1
Net cash provided by (used in) investing activities	(47)	(40)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	1,248	0
Payment of debt issuance costs	(11)	0
Principal payments on long-term debt	(544)	0
Proceeds from notes payable	0	230
Principal payments on notes payable	(150)	(80)
Payment of cash dividends	(244)	(474)
Proceeds from exercise of stock options: Nine months ended June 30, 2015 - 0.7 million shares; 2014 - 0.4 million shares	12	7
Purchase of treasury stock: Nine months ended June 30, 2015 - 4.5 million shares; 2014 - 3.5 million shares	(148)	(106)
Excess tax benefits on stock-based compensation	14	9
Net cash provided by (used in) financing activities	177	(414)
Net increase (decrease) in cash and cash equivalents	773	198
Cash and cash equivalents at beginning of period	1,460	1,062
Cash and cash equivalents at end of period	2,233	1,260
Supplemental cash flow information:
Interest paid	23	22
Income taxes paid	$ 355	$ 367

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) - shares shares in Millions	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Cash Flows [Abstract]
Proceeds from exercise of stock options, shares	0.7	0.4
Purchase of treasury stock, shares	4.5	3.5

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The condensed consolidated financial statements include the accounts of TD Ameritrade Holding Corporation (the "Parent") and its wholly-owned subsidiaries (collectively, the "Company"). Intercompany balances and transactions have been eliminated. These financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") and, in the opinion of management, reflect all adjustments, which are all of a normal recurring nature, necessary to present fairly the financial position, results of operations and cash flows for the periods presented in conformity with U.S. generally accepted accounting principles ("GAAP"). These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s annual report filed on Form 10-K for the fiscal year ended September 30, 2014 . Recently Adopted Accounting Pronouncements ASU 2014-11 — During fiscal 2015, the Company adopted Accounting Standards Update ("ASU") 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures . The amendments in ASU 2014-11 require entities to account for repurchase-to-maturity transactions and linked repurchase financings as secured borrowings, which is consistent with the accounting for other repurchase agreements. The new accounting requirements became effective for the Company on January 1, 2015, and did not result in any accounting changes because the Company does not act as a transferor in repurchase-to-maturity transactions or linked repurchase financings. In addition, the amendments require new disclosures, including information regarding collateral pledged in securities lending transactions and similar transactions that are accounted for as secured borrowings. On April 1, 2015, the Company prospectively adopted the new disclosure requirements related to collateral pledged in transactions that are accounted for as secured borrowings. Adoption of ASU 2014-11 resulted only in certain additional disclosures presented in Note 9. Recently Issued Accounting Pronouncements ASU 2014-09 — In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, Revenue from Contracts with Customers , to clarify the principles of recognizing revenue from contracts with customers and to improve financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards. This ASU will supersede the revenue recognition requirements in Accounting Standards Codification ("ASC") Topic 605, Revenue Recognition, and most industry-specific guidance. Entities are required to apply the following steps when recognizing revenue under ASU 2014-09: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and, (5) recognize revenue when (or as) the entity satisfies a performance obligation. This ASU also requires additional disclosures related to the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. An entity may apply the amendments by using one of the following two methods: (1) retrospective application to each prior reporting period presented or (2) a modified retrospective approach, requiring the standard be applied only to the most current period presented, with the cumulative effect of initially applying the standard recognized at the date of initial application. The effective date was recently deferred for one year to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Therefore, ASU 2014-09 will be effective for the Company's fiscal year beginning October 1, 2018. Early adoption is permitted as of the original effective date (annual reporting periods beginning after December 15, 2016). The Company is currently assessing the impact that ASU 2014-09 will have on the Company's financial statements and evaluating which adoption method to apply. ASU 2015-03 — In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs . To simplify the presentation of debt issuance costs, the amendments in ASU 2015-03 require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 requires retrospective application and is effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. Therefore, ASU 2015-03 will be effective for the Company's fiscal year beginning October 1, 2016. Early adoption is permitted. The adoption of ASU 2015-03 will change the location where debt issuance costs are presented in the balance sheet and is not expected to have any other impact on the Company's financial statements. As of June 30, 2015, the Company had debt issuance costs, related to recognized debt liabilities, of approximately $12 million, which are included in other assets on the Condensed Consolidated Balance Sheet.

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Jun. 30, 2015
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	CASH AND CASH EQUIVALENTS The Company’s cash and cash equivalents is summarized in the following table (dollars in millions): June 30, September 30, Corporate $ 1,117 $ 298 Broker-dealer subsidiaries 975 1,090 Futures commission merchant subsidiary 42 — Trust company subsidiary 72 53 Investment advisory subsidiaries 27 19 Total $ 2,233 $ 1,460 Capital requirements may limit the amount of cash available for dividend from the broker-dealer, futures commission merchant ("FCM") and trust company subsidiaries to the parent company. Most of the trust company cash and cash equivalents arises from client transactions in the process of settlement, and therefore is generally not available for corporate purposes. Cash and cash equivalents of the investment advisory subsidiaries is generally not available for corporate purposes.

Cash and Investments Segregated

Cash and Investments Segregated and on Deposit for Regulatory Purposes	9 Months Ended
	Jun. 30, 2015
Restricted Cash and Investments [Abstract]
Cash and Investments Segregated and on Deposit for Regulatory Purposes	CASH AND INVESTMENTS SEGREGATED AND ON DEPOSIT FOR REGULATORY PURPOSES Cash and investments segregated and on deposit for regulatory purposes consists of the following (dollars in millions): June 30, September 30, U.S. government debt securities $ 2,305 $ 3,070 Reverse repurchase agreements (collateralized by U.S. government debt securities) 1,236 1,193 Cash in demand deposit accounts 646 617 Cash on deposit with futures commission merchants 163 186 U.S. government debt securities on deposit with futures commission merchant 75 50 Total $ 4,425 $ 5,116

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Company’s effective income tax rate for the nine months ended June 30, 2015 was 36.6% , compared to 37.9% for the nine months ended June 30, 2014 . The provision for income taxes for the nine months ended June 30, 2015 was lower than normal primarily due to $20 million of favorable resolutions of state income tax matters. This favorably impacted the Company's earnings for the nine months ended June 30, 2015 by approximately four cents per share. The provision for income taxes for the nine months ended June 30, 2014 includes $9 million of favorable resolutions of state income tax matters, partially offset by $2 million of unfavorable deferred income tax adjustments resulting from state income tax law changes. These items had a net favorable impact on the Company’s earnings for the nine months ended June 30, 2014 of approximately one cent per share.

Notes Payable and Long-Term Deb

Notes Payable and Long-Term Debt	9 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Notes Payable and Long-Term Debt	NOTES PAYABLE AND LONG-TERM DEBT Notes payable and long-term debt consist of the following (dollars in millions): June 30, 2015 Face Value Unamortized Discount Fair Value Adjustment (1) Net Carrying Value Long-term debt: Senior Notes: 5.600% Notes due 2019 $ 500 $ — $ 33 $ 533 2.950% Notes due 2022 750 (2 ) — 748 3.625% Notes due 2025 500 — 4 504 Secured Loan: Variable-rate Note due 2019 25 — — 25 Total long-term debt $ 1,775 $ (2 ) $ 37 $ 1,810 September 30, 2014 Face Value Unamortized Discount Fair Value Adjustment (1) Net Carrying Value Notes payable: Parent Revolving Facility $ 150 $ — $ — $ 150 Long-term debt: Senior Notes: 4.150% Notes due 2014 500 — 2 502 5.600% Notes due 2019 500 — 30 530 Secured Loan: Variable-rate Note due 2019 69 — — 69 Subtotal – Long-term debt 1,069 — 32 1,101 Total notes payable and long-term debt $ 1,219 $ — $ 32 $ 1,251 (1) Fair value adjustments relate to changes in the fair value of the debt while in a fair value hedging relationship. See " Fair Value Hedging " below. Senior Notes - On October 17, 2014 , the Company sold, through a public offering, $500 million aggregate principal amount of unsecured 3.625% Senior Notes due April 1, 2025 (the "2025 Notes"). Interest on the 2025 Notes will be payable in arrears semi-annually on April 1 and October 1 of each year. The Company used the net proceeds from the issuance of the 2025 Notes, together with cash on hand, to repay in full the outstanding principal under the Company's 4.150% Senior Notes (the "2014 Notes") that matured on December 1, 2014 . On March 4, 2015 , the Company sold, through a public offering, $750 million aggregate principal amount of unsecured 2.950% Senior Notes due April 1, 2022 (the "2022 Notes"). Interest on the 2022 Notes will be payable in arrears semi-annually on April 1 and October 1 of each year, beginning on October 1, 2015. The Company issued the 2022 Notes for general corporate purposes, including liquidity for operational contingencies. Fair Value Hedging – The Company is exposed to changes in the fair value of its fixed-rate Senior Notes resulting from interest rate fluctuations. To hedge a portion of this exposure, the Company has entered into fixed-for-variable interest rate swaps on its 5.600% Senior Notes due December 1, 2019 (the "2019 Notes") and 2025 Notes. Each fixed-for-variable interest rate swap has a notional amount of $500 million and a maturity date matching the maturity date of the respective Senior Notes. During December 2014, the Company paid in full the outstanding principal under the 2014 Notes and the interest rate swap on the 2014 Notes expired. The interest rate swaps effectively change the fixed-rate interest on the 2019 Notes and 2025 Notes to variable-rate interest. Under the terms of the interest rate swap agreements, the Company receives semi-annual fixed-rate interest payments based on the same rates applicable to the Senior Notes, and makes quarterly variable-rate interest payments based on three-month LIBOR plus (a) 2.3745% for the swap on the 2019 Notes and (b) 1.1022% for the swap on the 2025 Notes. As of June 30, 2015 , the weighted average effective interest rate on the aggregate principal balance of the 2019 Notes and 2025 Notes was 2.02% . The interest rate swaps are accounted for as fair value hedges and qualify for the shortcut method of accounting. Changes in the payment of interest resulting from the interest rate swaps are recorded in interest on borrowings on the Condensed Consolidated Statements of Income. Changes in fair value of the interest rate swaps are completely offset by changes in fair value of the related notes, resulting in no effect on net income. The following table summarizes gains and losses resulting from changes in the fair value of interest rate swaps designated as fair value hedges and the hedged fixed-rate debt for the periods indicated (dollars in millions): Three Months Ended June 30, Nine Months Ended June 30, 2015 2014 2015 2014 Gain (loss) on fair value of interest rate swaps $ (24 ) $ 1 $ 5 $ (11 ) Gain (loss) on fair value of hedged fixed-rate debt 24 (1 ) (5 ) 11 Net gain (loss) recorded in interest on borrowings $ — $ — $ — $ — Cash Flow Hedging – On January 17, 2014 , the Company entered into forward-starting interest rate swap contracts with an aggregate notional amount of $500 million , to hedge against changes in the benchmark interest rate component of future interest payments resulting from the anticipated refinancing of the 2014 Notes. The Company designated the contracts as a cash flow hedge of the future interest payments. Under cash flow hedge accounting, until settlement the swap contracts are carried at fair value and, to the extent they are an effective hedge, any unrealized gains or losses are recorded in other comprehensive income (loss). Any ineffective portion of the unrealized gains or losses is immediately recorded into earnings. Upon settlement, any realized gain or loss that has been recorded in other comprehensive income (loss) is amortized into earnings over the term of the newly-issued fixed-rate debt. On October 17, 2014, the Company sold $500 million of 2025 Notes as described under " Senior Notes " above, and paid approximately $45 million to settle the forward-starting interest rate swap contracts. As of October 17, 2014, the Company recorded $0.5 million of pre-tax loss immediately into earnings to reflect ineffectiveness resulting from the issuance of the 2025 Notes slightly earlier than forecast. As of June 30, 2015 , the Company expects to amortize $4.4 million of pre-tax losses, that were reported in accumulated other comprehensive income (loss), into interest on borrowings on the Condensed Consolidated Statements of Income within the next 12 months . The following table summarizes pre-tax losses resulting from changes in the fair value of the forward-starting interest rate swaps for the periods indicated (dollars in millions): Amount of Loss Recognized in Other Comprehensive Income (Loss) (Effective Portion) Three Months Ended June 30, Nine Months Ended June 30, 2015 2014 2015 2014 Forward-starting interest rate swaps $ — $ (15 ) $ (15 ) $ (24 ) Balance Sheet Impact of Hedging Instruments — The following table summarizes the fair value of outstanding derivatives designated as hedging instruments on the Condensed Consolidated Balance Sheets (dollars in millions): Balance Sheet Location June 30, September 30, Interest rate contracts: Pay-variable interest rate swaps designated as fair value hedges Other assets $ 37 $ 32 Forward-starting interest rate swaps designated as cash flow hedges Accounts payable and other liabilities $ — $ (29 ) The interest rate swaps are subject to counterparty credit risk. Credit risk is managed by limiting activity to approved counterparties that meet a minimum credit rating threshold, by entering into credit support agreements, or by utilizing approved central clearing counterparties registered with the Commodity Futures Trading Commission ("CFTC"). The interest rate swaps require daily collateral coverage, in the form of cash or U.S. Treasury securities, for the aggregate fair value of the interest rate swaps (including accrued interest). As of June 30, 2015 and September 30, 2014 , the pay-variable interest rate swap counterparties had pledged $39 million and $47 million of collateral, respectively, to the Company in the form of cash. A liability for collateral pledged to the Company in the form of cash is recorded in accounts payable and other liabilities on the Condensed Consolidated Balance Sheets. As of September 30, 2014 the Company had pledged $43 million of collateral to the forward-starting interest rate swap counterparties in the form of cash. An asset for collateral pledged to the swap counterparties in the form of cash is recorded in other assets on the Condensed Consolidated Balance Sheets. TD Ameritrade Holding Corporation Credit Agreement — On June 11, 2014 , the Parent entered into a credit agreement consisting of a senior unsecured revolving credit facility in the aggregate principal amount of $300 million (the "Parent Revolving Facility"). The maturity date of the Parent Revolving Facility is June 11, 2019 . The applicable interest rate under the Parent Revolving Facility is calculated as a per annum rate equal to, at the option of the Parent, (a) LIBOR plus an interest rate margin ("Parent LIBOR loans") or (b) (i) the highest of (x) the prime rate, (y) the federal funds effective rate plus 0.50% or (z) one-month LIBOR plus 1.00% , plus (ii) an interest rate margin ("Base Rate loans"). The interest rate margin ranges from 0.875% to 1.75% for Parent LIBOR loans and from 0% to 0.75% for Base Rate loans, determined by reference to the Company’s public debt ratings. The Parent is obligated to pay a commitment fee ranging from 0.10% to 0.25% on any unused amount of the Parent Revolving Facility, determined by reference to the Company's public debt ratings. As of June 30, 2015 , the interest rate margin would have been 1.25% for Parent LIBOR loans and 0.25% for Base Rate loans, and the commitment fee was 0.15% , each determined by reference to the Company's public debt ratings. There were no borrowings outstanding under the Parent Revolving Facility as of June 30, 2015 . As of September 30, 2014 , there was $150 million of borrowings outstanding under the Parent Revolving Facility, consisting of Parent LIBOR loans. As of September 30, 2014 , the commitment fee was 0.15% and the interest rate margin was 1.25% , each determined by reference to the Company’s public debt ratings, and the interest rate was 1.40% , based on one-month LIBOR plus the interest rate margin. The obligations under the Parent Revolving Facility are guaranteed by TD Ameritrade Online Holdings Corp. ("TDAOH"), a wholly-owned subsidiary of the Company, and each "significant subsidiary" (as defined in SEC Rule 1-02(w) of Regulation S‑X) of the Parent, other than broker-dealer subsidiaries, FCM subsidiaries and controlled foreign corporations. Currently, the only subsidiary guarantor of the obligations under the Parent Revolving Facility is TDAOH. The Parent Revolving Facility contains negative covenants that limit or restrict, subject to certain exceptions, the incurrence of liens, indebtedness of subsidiaries, mergers, consolidations, transactions with affiliates, change in nature of business and the sale of all or substantially all of the assets of the Company. The Parent is also required to maintain compliance with a maximum consolidated leverage ratio covenant and a minimum consolidated interest coverage ratio covenant, and the Company's broker-dealer and FCM subsidiaries are required to maintain compliance with a minimum regulatory net capital covenant. The Company was in compliance with all covenants under the Parent Revolving Facility as of June 30, 2015 . TD Ameritrade Clearing, Inc. Credit Agreement - On June 11, 2014 , TD Ameritrade Clearing, Inc. ("TDAC"), the Company’s clearing broker-dealer subsidiary, entered into a credit agreement consisting of a senior unsecured revolving credit facility in the aggregate principal amount of $300 million (the "TDAC Revolving Facility"). The maturity date of the TDAC Revolving Facility is June 11, 2019 . The applicable interest rate under the TDAC Revolving Facility is calculated as a per annum rate equal to, at the option of TDAC, (a) LIBOR plus an interest rate margin ("TDAC LIBOR loans") or (b) the federal funds effective rate plus an interest rate margin ("Fed Funds Rate loans"). The interest rate margin ranges from 0.75% to 1.50% for both TDAC LIBOR loans and Fed Funds Rate loans, determined by reference to the Company’s public debt ratings. TDAC is obligated to pay a commitment fee ranging from 0.08% to 0.20% on any unused amount of the TDAC Revolving Facility, determined by reference to the Company’s public debt ratings. As of June 30, 2015 , the interest rate margin would have been 1.00% for both TDAC LIBOR loans and Fed Funds Rate loans, and the commitment fee was 0.125% , each determined by reference to the Company’s public debt ratings. There were no borrowings outstanding under the TDAC Revolving Facility as of June 30, 2015 and September 30, 2014 . The TDAC Revolving Facility contains negative covenants that limit or restrict, subject to certain exceptions, the incurrence of liens, indebtedness of TDAC, mergers, consolidations, change in nature of business and the sale of all or substantially all of the assets of TDAC. TDAC is also required to maintain minimum tangible net worth and is required to maintain compliance with minimum regulatory net capital requirements. TDAC was in compliance with all covenants under the TDAC Revolving Facility as of June 30, 2015 . Intercompany Credit Agreements — During March 2015, the Parent entered into credit agreements with each of its primary broker-dealer and FCM subsidiaries as described below. The intercompany credit agreement with TDAC was established on March 31, 2015 and will terminate on March 1, 2022 . Under this agreement, TDAC may borrow up to $700 million in cash or securities from the Parent under a committed facility. In addition, the Parent is permitted, but under no obligation, to make loans of up to $300 million in cash or securities to TDAC under an uncommitted facility. Loans under both the committed and uncommitted facilities bear interest at the same rate as borrowings under the TDAC Revolving Facility and must be repaid with interest on or before the termination date. The intercompany credit agreement with TD Ameritrade, Inc., the Company's introducing broker-dealer subsidiary, was established on March 31, 2015 and will terminate on March 1, 2022 . Under this agreement, TD Ameritrade, Inc. may borrow up to $50 million in cash or securities from the Parent under a committed facility. In addition, the Parent is permitted, but under no obligation, to make loans of up to $300 million in cash or securities to TD Ameritrade, Inc. under an uncommitted facility. Loans under both the committed and uncommitted facilities bear interest at the same rate as borrowings under the TDAC Revolving Facility and must be repaid with interest on or before the termination date. The intercompany credit agreement with TD Ameritrade Futures & Forex LLC ("TDAFF"), the Company's FCM subsidiary, was established on March 29, 2015 and has an initial term of five years. The agreement will automatically renew for an additional five -year term, unless either party provides notice to the other of its intent to terminate not less than 30 days before the end of the then current term. Under this agreement, TDAFF may borrow from the Parent, under a committed facility, up to 75% of TDAFF's "residual interest target" as determined by TDAFF in accordance with applicable rules and regulations. As of June 30, 2015 , TDAFF's residual interest target was $18 million and the corresponding loan commitment amount was $13.5 million . Loans under this facility bear interest at the prime rate plus 1.00% and must be repaid with interest not later than 60 calendar days following the date of the borrowing. There were no borrowings outstanding under any of the intercompany credit agreements as of June 30, 2015 .

Capital Requirements

Capital Requirements	9 Months Ended
	Jun. 30, 2015
Regulatory Capital Requirements [Abstract]
Capital Requirements	CAPITAL REQUIREMENTS The Company’s broker-dealer subsidiaries are subject to the SEC Uniform Net Capital Rule (Rule 15c3-1 under the Securities Exchange Act of 1934, or the "Exchange Act"), administered by the SEC and the Financial Industry Regulatory Authority ("FINRA"), which requires the maintenance of minimum net capital, as defined. Net capital and the related net capital requirement may fluctuate on a daily basis. TDAC, the Company’s clearing broker-dealer subsidiary, and TD Ameritrade, Inc., the Company’s introducing broker-dealer subsidiary, compute net capital under the alternative method as permitted by Rule 15c3-1. TDAC is required to maintain minimum net capital of the greater of $1.5 million , which is based on the type of business conducted by the broker-dealer, or 2% of aggregate debit balances arising from client transactions. Under Rule 15c3-1, TD Ameritrade, Inc. is required to maintain minimum net capital of the greater of $250,000 or 2% of aggregate debit balances. Prior to May 20, 2015, as an FCM registered with the CFTC, TD Ameritrade, Inc. was also subject to CFTC Regulation 1.17 under the Commodity Exchange Act, administered by the CFTC and the National Futures Association ("NFA"), which requires the maintenance of minimum net capital of the greatest of (a) $1.0 million , (b) its futures risk-based capital requirement, equal to 8% of the total risk margin requirement for all futures positions carried by the FCM in client and nonclient accounts, or (c) its Rule 15c3-1 net capital requirement. TD Ameritrade, Inc. transferred its futures and foreign exchange business to TDAFF effective March 29, 2015 and withdrew its registration as an FCM effective May 20, 2015. Under the alternative method, a broker-dealer may not repay any subordinated borrowings, pay cash dividends or make any unsecured advances or loans to its parent company or employees if such payment would result in a net capital amount of (a) less than 5% of aggregate debit balances, (b) less than 110% of its risk-based capital requirement under CFTC Regulation 1.17, or (c) less than 120% of its minimum dollar requirement. An FCM, such as TDAFF, that is not registered as a securities broker-dealer must provide notice to the CFTC if its net capital amounts to less than (a) 110% of its risk-based capital requirement under CFTC Regulation 1.17 or (b) less than 150% of its minimum dollar requirement. These broker-dealer and FCM net capital thresholds, which are specified in Exchange Act Rule 17a-11 and CFTC Regulation 1.12, are typically referred to as "early warning" net capital thresholds. Net capital and net capital requirements for the Company’s broker-dealer subsidiaries are summarized in the following tables (dollars in millions): TD Ameritrade Clearing, Inc. Date Net Capital Required Net Capital (2% of Aggregate Debit Balances) Net Capital in Excess of Required Net Capital Net Capital in Excess of Early Warning Threshold (5% of Aggregate Debit Balances) Ratio of Net Capital to Aggregate Debit Balances June 30, 2015 $ 1,533 $ 307 $ 1,226 $ 766 9.99 % September 30, 2014 $ 1,569 $ 280 $ 1,289 $ 868 11.19 % TD Ameritrade, Inc. Date Net Capital Required Net Capital (8% of Total Risk Margin or $250,000 Minimum Dollar Requirement) Net Capital in Excess of Required Net Capital Net Capital in Excess of Early Warning Threshold (110% or 120% of Required Net Capital) June 30, 2015 $ 264 $ — $ 264 $ 263 September 30, 2014 $ 347 $ 17 $ 330 $ 328 During October 2014, TDAFF registered as an FCM with the CFTC. TDAFF is subject to CFTC Regulation 1.17 under the Commodity Exchange Act, which requires the maintenance of minimum net capital as described above. Net capital and net capital requirements for TDAFF are summarized in the following table (dollars in millions): TD Ameritrade Futures & Forex LLC Date Net Capital Required Net Capital in Excess of Required Net Capital Net Capital in Excess of Early Warning Threshold (110% of Required Net Capital) June 30, 2015 $ 57 $ 11 46 $ 45 September 30, 2014 N/A N/A N/A N/A The Company’s non-depository trust company subsidiary, TD Ameritrade Trust Company ("TDATC"), is subject to capital requirements established by the State of Maine, which require TDATC to maintain minimum Tier 1 capital, as defined. TDATC’s Tier 1 capital was $30 million and $27 million as of June 30, 2015 and September 30, 2014 , respectively, which exceeded the required Tier 1 capital by $14 million and $12 million , respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Legal and Regulatory Matters Order Routing Litigation – Five putative class action complaints have been filed regarding TD Ameritrade’s routing of client orders. The cases are pending in the U.S. District Court for the District of Nebraska: Jay Zola et al. v. TD Ameritrade, Inc., et al. ; Tyler Verdieck v. TD Ameritrade, Inc. ; Bruce Lerner v. TD Ameritrade, Inc. ; Michael Sarbacker v. TD Ameritrade Holding Corporation, et al.; Gerald Klein v. TD Ameritrade Holding Corporation, et al. The complaints in Zola, Klein and Sarbacker allege that the defendants failed to provide clients with "best execution" and routed orders to the market venue that paid the most for its order flow. The complaints in Verdieck and Lerner allege that the defendant routed its clients’ non-marketable limit orders to the venue paying the highest rates of maker rebates, and that clients did not receive best execution on these kinds of orders. The complaints variously include claims of breach of contract, breach of fiduciary duty, breach of the duty of best execution, fraud, negligent misrepresentation, violation s of Section 10(b) and 20 of the Exchange Act and SEC Rule 10b-5, violation of Nebraska’s Consumer Protection Act, violation of Nebraska’s Uniform Deceptive Trade Practices Act, aiding and abetting, unjust enrichment and declaratory judgment. The complaints seek various kinds of relief including damages, restitution, disgorgement, injunctive relief, equitable relief and other relief. The Company intends to vigorously defend against these lawsuits. The Company is unable to predict the outcome or the timing of the ultimate resolution of these lawsuits, or the potential losses, if any, that may result. Reserve Yield Plus Fund Litigation – During September 2008, The Reserve, an independent mutual fund company, announced that the net asset value of the Reserve Yield Plus Fund declined below $1.00 per share. The Yield Plus Fund was not a money market mutual fund, but its stated objective was to maintain a net asset value of $1.00 per share. TD Ameritrade, Inc.’s clients continue to hold shares in the Yield Plus Fund (now known as "Yield Plus Fund – In Liquidation"), which is being liquidated. In November 2008, a purported class action lawsuit was filed with respect to the Yield Plus Fund. The lawsuit is captioned Ross v. Reserve Management Company, Inc. et al. and is pending in the U.S. District Court for the Southern District of New York. The Ross lawsuit is on behalf of persons who purchased shares of Reserve Yield Plus Fund. On November 20, 2009, the plaintiffs filed a first amended complaint naming as defendants the fund’s advisor, certain of its affiliates and the Company and certain of its directors, officers and shareholders as alleged control persons. The complaint alleges claims of violations of the federal securities laws and other claims based on allegations that false and misleading statements and omissions were made in the Reserve Yield Plus Fund prospectuses and in other statements regarding the fund. On March 19, 2015, the plaintiffs entered into an agreement with Reserve Management Company, Inc. and related defendants to settle the claims against them, subject to court approval. On March 26, 2015, the Company and the plaintiffs reached an agreement in principle to resolve the claims against the Company and its directors, officers and shareholders named as defendants, subject to definitive written terms that will require court approval. Under the agreement, the Company will make a cash contribution of $3.75 million toward a class settlement fund. All the parties entered into a stipulation of settlement as of June 4, 2015, subject to court approval, and filed a request for the Court’s preliminary approval of the settlement and approval of notices to class members. Other Legal and Regulatory Matters – The Company is subject to a number of other lawsuits, arbitrations, claims and other legal proceedings in connection with its business. Some of these legal actions include claims for substantial or unspecified compensatory and/or punitive damages. In addition, in the normal course of business, the Company discusses matters with its regulators raised during regulatory examinations or otherwise subject to their inquiry. These matters could result in censures, fines, penalties or other sanctions. ASC 450, Loss Contingencies, governs the recognition and disclosure of loss contingencies, including potential losses from legal and regulatory matters. ASC 450 categorizes loss contingencies using three terms based on the likelihood of occurrence of events that result in a loss: "probable" means that "the future event or events are likely to occur;" "remote" means that "the chance of the future event or events occurring is slight;" and "reasonably possible" means that "the chance of the future event or events occurring is more than remote but less than likely." Under ASC 450, the Company accrues for losses that are considered both probable and reasonably estimable. The Company may incur losses in addition to the amounts accrued where the losses are greater than estimated by management, or for matters for which an unfavorable outcome is considered reasonably possible, but not probable. The Company estimates that the aggregate range of reasonably possible losses in excess of amounts accrued is from $0 to $35 million as of June 30, 2015 . This estimated aggregate range of reasonably possible losses is based upon currently available information for those legal and regulatory matters in which the Company is involved, taking into account the Company’s best estimate of reasonably possible losses for those cases as to which an estimate can be made. For certain cases, the Company does not believe an estimate can currently be made, as some cases are in preliminary stages and some cases have no specific amounts claimed. The Company’s estimate involves significant judgment, given the varying stages of the proceedings and the inherent uncertainty of predicting outcomes. The estimated range will change from time to time as the underlying matters, stages of proceedings and available information change. Actual losses may vary significantly from the current estimated range. The Company believes, based on its current knowledge and after consultation with counsel, that the ultimate disposition of these legal and regulatory matters, individually or in the aggregate, is not likely to have a material adverse effect on the financial condition or cash flows of the Company. However, in light of the uncertainties involved in such matters, the Company is unable to predict the outcome or the timing of the ultimate resolution of these matters, or the potential losses, fines, penalties or equitable relief, if any, that may result, and it is possible that the ultimate resolution of one or more of these matters may be material to the Company’s results of operations for a particular reporting period. Income Taxes The Company’s federal and state income tax returns are subject to examination by taxing authorities. Because the application of tax laws and regulations to many types of transactions is subject to varying interpretations, amounts reported in the condensed consolidated financial statements could be significantly changed at a later date upon final determinations by taxing authorities. The Toronto-Dominion Bank ("TD") has agreed to indemnify the Company for tax obligations, if any, pertaining to activities of TD Waterhouse Group, Inc. ("TD Waterhouse") prior to the Company’s acquisition of TD Waterhouse in January 2006. General Contingencies In the ordinary course of business, there are various contingencies that are not reflected in the condensed consolidated financial statements. These include the Company’s broker-dealer and FCM subsidiaries’ client activities involving the execution, settlement and financing of various client securities, options, futures and foreign exchange transactions. These activities may expose the Company to credit risk in the event the clients are unable to fulfill their contractual obligations. The Company extends margin credit and leverage to its clients. In margin transactions, the Company extends credit to the client, subject to various regulatory and internal margin requirements, collateralized by cash and securities in the client’s account. In connection with these activities, the Company also executes and clears client transactions involving the sale of securities not yet purchased ("short sales"). Such margin-related transactions may expose the Company to credit risk in the event a client’s assets are not sufficient to fully cover losses that the client may incur. Leverage involves securing a large potential future obligation with a lesser amount of cash and securities. The risks associated with margin credit and leverage increase during periods of rapid market movements, or in cases where leverage or collateral is concentrated and market movements occur. In the event the client fails to satisfy its obligations, the Company has the authority to purchase or sell financial instruments in the client’s account at prevailing market prices in order to fulfill the client’s obligations. However, during periods of rapid market movements, clients who utilize margin credit or leverage and who have collateralized their obligations with securities may find that the securities have a rapidly depreciating value and may not be sufficient to cover their obligations in the event of liquidation. The Company seeks to mitigate the risks associated with its client margin and leverage activities by requiring clients to maintain margin collateral in compliance with various regulatory and internal guidelines. The Company monitors required margin levels throughout each trading day and, pursuant to such guidelines, requires clients to deposit additional collateral, or to reduce positions, when necessary. The Company loans securities temporarily to other broker-dealers in connection with its broker-dealer business. The Company receives cash as collateral for the securities loaned. Increases in securities prices may cause the market value of the securities loaned to exceed the amount of cash received as collateral. In the event the counterparty to these transactions does not return the loaned securities, the Company may be exposed to the risk of acquiring the securities at prevailing market prices in order to satisfy its client obligations. The Company mitigates this risk by requiring credit approvals for counterparties, by monitoring the market value of securities loaned on a daily basis and requiring additional cash as collateral when necessary, and by participating in a risk-sharing program offered through the Options Clearing Corporation ("OCC"). The Company borrows securities temporarily from other broker-dealers in connection with its broker-dealer business. The Company deposits cash as collateral for the securities borrowed. Decreases in securities prices may cause the market value of the securities borrowed to fall below the amount of cash deposited as collateral. In the event the counterparty to these transactions does not return the cash deposited, the Company may be exposed to the risk of selling the securities at prevailing market prices. The Company mitigates this risk by requiring credit approvals for counterparties, by monitoring the collateral values on a daily basis and requiring collateral to be returned by the counterparties when necessary, and by participating in a risk-sharing program offered through the OCC. The Company transacts in reverse repurchase agreements (securities purchased under agreements to resell) in connection with its broker-dealer business. The Company’s policy is to take possession or control of securities with a market value in excess of the principal amount loaned, plus accrued interest, in order to collateralize resale agreements. The Company monitors the market value of the underlying securities that collateralize the related receivable on resale agreements on a daily basis and may require additional collateral when deemed appropriate. The Company has accepted collateral in connection with client margin loans and securities borrowed. Under applicable agreements, the Company is generally permitted to repledge securities held as collateral and use them to enter into securities lending arrangements. The following table summarizes the fair values of client margin securities and stock borrowings that were available to the Company to utilize as collateral on various borrowings or for other purposes, and the amount of that collateral loaned or repledged by the Company (dollars in billions): June 30, September 30, Client margin securities $ 17.9 $ 16.2 Stock borrowings 0.8 1.0 Total collateral available $ 18.7 $ 17.2 Collateral loaned $ 2.4 $ 2.4 Collateral repledged 2.7 2.5 Total collateral loaned or repledged $ 5.1 $ 4.9 The Company is subject to cash deposit and collateral requirements with clearinghouses based on its clients’ trading activity. The following table summarizes cash deposited with and securities pledged to clearinghouses by the Company (dollars in millions): Assets Balance Sheet Classification June 30, September 30, Cash Receivable from brokers, dealers and clearing organizations $ 284 $ 104 U.S. government debt securities Securities owned, at fair value 185 181 Total $ 469 $ 285 Guarantees The Company is a member of and provides guarantees to securities clearinghouses and exchanges in connection with client trading activities. Under related agreements, the Company is generally required to guarantee the performance of other members. Under these agreements, if a member becomes unable to satisfy its obligations to the clearinghouse, other members would be required to meet shortfalls. The Company’s liability under these arrangements is not quantifiable and could exceed the cash and securities it has posted to the clearinghouse as collateral. However, the potential for the Company to be required to make payments under these agreements is considered remote. Accordingly, no contingent liability is carried on the Condensed Consolidated Balance Sheets for these guarantees. The Company clears its clients’ futures transactions on an omnibus account basis through unaffiliated clearing firms. The Company has agreed to indemnify the unaffiliated clearing firms for any loss that they may incur for the client transactions introduced to them by the Company. See " Insured Deposit Account Agreement " in Note 12 for a description of a guarantee included in that agreement.

Fair Value Disclosures

Fair Value Disclosures	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures	FAIR VALUE DISCLOSURES Fair Value Measurement — Definition and Hierarchy ASC 820-10, Fair Value Measurement , defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. ASC 820-10 establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability, developed based on market data obtained from sources independent of the Company. Unobservable inputs reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability, developed based on the best information available in the circumstances. The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels, as follows: • Level 1— Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. This category includes active exchange-traded funds, money market mutual funds, mutual funds and equity securities. • Level 2— Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Such inputs include quoted prices in markets that are not active, quoted prices for similar assets and liabilities in active and inactive markets, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means. This category includes most debt securities and other interest-sensitive financial instruments. • Level 3 — Unobservable inputs for the asset or liability, where there is little, if any, observable market activity or data for the asset or liability. The following tables present the Company’s fair value hierarchy for assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and September 30, 2014 (dollars in millions): As of June 30, 2015 Level 1 Level 2 Level 3 Fair Value Assets: Cash equivalents: Money market mutual funds $ 2,048 $ — $ — $ 2,048 Investments segregated for regulatory purposes: U.S. government debt securities — 2,380 — 2,380 Securities owned: Money market and other mutual funds — — 2 2 U.S. government debt securities — 406 — 406 Other 1 3 — 4 Subtotal - Securities owned 1 409 2 412 Other assets: Pay-variable interest rate swaps (1) — 37 — 37 U.S. government debt securities — 4 — 4 Auction rate securities — — 1 1 Subtotal - Other assets — 41 1 42 Total assets at fair value $ 2,049 $ 2,830 $ 3 $ 4,882 Liabilities: Accounts payable and other liabilities: Securities sold, not yet purchased: Equity securities $ 13 $ — $ — $ 13 (1) See " Fair Value Hedging " in Note 5 for details. As of September 30, 2014 Level 1 Level 2 Level 3 Fair Value Assets: Cash equivalents: Money market mutual funds $ 1,284 $ — $ — $ 1,284 Investments segregated for regulatory purposes: U.S. government debt securities — 3,120 — 3,120 Securities owned: Money market and other mutual funds — — 1 1 U.S. government debt securities — 326 — 326 Other 2 3 — 5 Subtotal - Securities owned 2 329 1 332 Other assets: Pay-variable interest rate swaps (1) — 32 — 32 U.S. government debt securities — 4 — 4 Auction rate securities — — 1 1 Subtotal - Other assets — 36 1 37 Total assets at fair value $ 1,286 $ 3,485 $ 2 $ 4,773 Liabilities: Accounts payable and other liabilities: Forward-starting interest rate swaps (2) $ — $ 29 $ — $ 29 Securities sold, not yet purchased: Equity securities 1 — — 1 Total liabilities at fair value $ 1 $ 29 $ — $ 30 (1) See " Fair Value Hedging " in Note 5 for details. (2) See " Cash Flow Hedging " in Note 5 for details. There were no transfers between any levels of the fair value hierarchy during the periods covered by this report. Valuation Techniques In general, and where applicable, the Company uses quoted prices in active markets for identical assets or liabilities to determine fair value. This pricing methodology applies to the Company’s Level 1 assets and liabilities. If quoted prices in active markets for identical assets and liabilities are not available to determine fair value, then the Company uses quoted prices for similar assets and liabilities or inputs other than the quoted prices that are observable, either directly or indirectly. This pricing methodology applies to the Company’s Level 2 assets and liabilities. Level 2 Measurements: Debt Securities – Fair values for debt securities are based on prices obtained from an independent pricing vendor. The primary inputs to the valuation include quoted prices for similar assets in active markets, quoted prices for identical or similar assets in markets that are not active, contractual cash flows, benchmark yields and credit spreads. The Company validates the vendor pricing by periodically comparing it to pricing from another independent pricing service. The Company has not adjusted prices obtained from the independent pricing vendor for any periods presented in the condensed consolidated financial statements because no significant pricing differences have been observed. Interest Rate Swaps – These derivatives are valued by the Company using a valuation model provided by a third party service that incorporates interest rate yield curves, which are observable for substantially the full term of the contract. The valuation model is widely accepted in the financial services industry and does not involve significant judgment because most of the inputs are observable in the marketplace. Credit risk is not an input to the valuation because in each case the Company or counterparty has possession of collateral, in the form of cash or U.S. Treasury securities, in amounts equal to or exceeding the fair value of the interest rate swaps. The Company validates the third party service valuations by comparing them to valuation models provided by the swap counterparties. Level 3 Measurements: The Company has no material assets or liabilities classified as Level 3 of the fair value hierarchy. Fair Value of Financial Instruments Not Recorded at Fair Value Cash and cash equivalents, receivable from/payable to brokers, dealers and clearing organizations, receivable from/payable to clients, receivable from/payable to affiliates, other receivables, accounts payable and other liabilities and notes payable are short-term in nature and accordingly are carried at amounts that approximate fair value. Cash and cash equivalents include cash and highly-liquid investments with an original maturity of three months or less (categorized as Level 1 of the fair value hierarchy). Receivable from/payable to brokers, dealers and clearing organizations, receivable from/payable to clients, receivable from/payable to affiliates, other receivables, accounts payable and other liabilities and notes payable are recorded at or near their respective transaction prices and historically have been settled or converted to cash at approximately that value (categorized as Level 2 of the fair value hierarchy). Cash and investments segregated and on deposit for regulatory purposes includes reverse repurchase agreements (securities purchased under agreements to resell). Reverse repurchase agreements are treated as collateralized financing transactions and are carried at amounts at which the securities will subsequently be resold, plus accrued interest. The Company’s reverse repurchase agreements generally have a maturity of seven days and are collateralized by U.S. Treasury securities in amounts exceeding the carrying value of the resale agreements. Accordingly, the carrying value of reverse repurchase agreements approximates fair value (categorized as Level 2 of the fair value hierarchy). In addition, this category includes cash held in demand deposit accounts and on deposit with futures commission merchants, for which the carrying values approximate the fair value (categorized as Level 1 of the fair value hierarchy). See Note 3 for a summary of cash and investments segregated and on deposit for regulatory purposes. Long-term debt – As of June 30, 2015 , the Company’s Senior Notes had an aggregate estimated fair value, based on quoted market prices (categorized as Level 1 of the fair value hierarchy), of approximately $1.819 billion , compared to the aggregate carrying value of the Senior Notes on the Condensed Consolidated Balance Sheet of $1.785 billion . As of September 30, 2014 , the Company’s Senior Notes had an aggregate estimated fair value, based on quoted market prices, of approximately $1.081 billion , compared to the aggregate carrying value of the Senior Notes on the Condensed Consolidated Balance Sheet of $1.032 billion . The carrying value of the Company's variable-rate secured loan approximates fair value because of the frequent repricing of the loan based on market interest rates (categorized as Level 2 of the fair value hierarchy).

Offsetting Assets and Liabiliti

Offsetting Assets and Liabilities	9 Months Ended
	Jun. 30, 2015
Offsetting [Abstract]
Offsetting Assets and Liabilities	OFFSETTING ASSETS AND LIABILITIES Substantially all of the Company’s reverse repurchase agreements, securities borrowing and securities lending activity and derivative financial instruments are transacted under master agreements that may allow for net settlement in the ordinary course of business, as well as offsetting of all contracts with a given counterparty in the event of default by one of the parties. However, for financial statement purposes, the Company does not net balances related to these financial instruments. The following tables present information about the potential effect of rights of setoff associated with the Company’s recognized assets and liabilities as of June 30, 2015 and September 30, 2014 (dollars in millions): June 30, 2015 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Assets and Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts Presented in the Condensed Consolidated Balance Sheet Financial Instruments (4) Collateral Received or Pledged (Including Cash) (5) Net Amount (6) Assets: Investments segregated for regulatory purposes: Reverse repurchase agreements $ 1,236 $ — $ 1,236 $ — $ (1,236 ) $ — Receivable from brokers, dealers and clearing organizations: Deposits paid for securities borrowed (1) 846 — 846 (54 ) (776 ) 16 Other assets: Pay-variable interest rate swaps 37 — 37 — (37 ) — Total $ 2,119 $ — $ 2,119 $ (54 ) $ (2,049 ) $ 16 Liabilities: Payable to brokers, dealers and clearing organizations: Deposits received for securities loaned (2)(3) $ 2,363 $ — $ 2,363 $ (54 ) $ (2,065 ) $ 244 September 30, 2014 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Assets and Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts Presented in the Condensed Consolidated Balance Sheet Financial Instruments (4) Collateral Received or Pledged (Including Cash) (5) Net Amount (6) Assets: Investments segregated for regulatory purposes: Reverse repurchase agreements $ 1,193 $ — $ 1,193 $ — $ (1,193 ) $ — Receivable from brokers, dealers Deposits paid for securities borrowed (1) 995 — 995 (69 ) (900 ) 26 Other assets: Pay-variable interest rate swaps 32 — 32 — (32 ) — Total $ 2,220 $ — $ 2,220 $ (69 ) $ (2,125 ) $ 26 Liabilities: Payable to brokers, dealers and clearing organizations: Deposits received for securities loaned (2) $ 2,384 $ — $ 2,384 $ (69 ) $ (2,015 ) $ 300 Accounts payable and other liabilities: Forward-starting interest rate swaps 29 — 29 — (29 ) — Total $ 2,413 $ — $ 2,413 $ (69 ) $ (2,044 ) $ 300 (1) Included in the gross amounts of deposits paid for securities borrowed is $499 million and $616 million as of June 30, 2015 and September 30, 2014 , respectively, transacted through a risk-sharing program with the OCC, which guarantees the return of cash to the Company. See "General Contingencies" in Note 7 for a discussion of the potential risks associated with securities borrowing transactions and how the Company mitigates those risks. (2) Included in the gross amounts of deposits received for securities loaned is $685 million and $754 million as of June 30, 2015 and September 30, 2014 , respectively, transacted through a risk-sharing program with the OCC, which guarantees the return of securities to the Company. See "General Contingencies" in Note 7 for a discussion of the potential risks associated with securities lending transactions and how the Company mitigates those risks. (3) Substantially all of the Company's securities lending transactions have a continuous contractual term and, upon notice by either party, may be terminated within three business days. The following table summarizes the Company's gross liability for securities lending transactions by the class of securities loaned (dollars in millions): June 30, 2015 Deposits received for securities loaned: Equity securities $ 2,132 Exchange-traded funds 137 Closed-end funds 57 Other 37 Total $ 2,363 (4) Amounts represent recognized assets and liabilities that are subject to enforceable master agreements with rights of setoff. (5) Represents the fair value of collateral the Company had received or pledged under enforceable master agreements, limited for table presentation purposes to the net amount of the recognized assets due from or liabilities due to each counterparty. At June 30, 2015 and September 30, 2014 , the Company had received total collateral with a fair value of $2,128 million and $2,231 million , respectively, and pledged total collateral with a fair value of $2,117 million and $2,124 million , respectively. (6) Represents the amount for which, in the case of net recognized assets, the Company had not received collateral, and in the case of net recognized liabilities, the Company had not pledged collate

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income (Loss)	ACCUMULATED OTHER COMPREHENSIVE LOSS The following tables present the net change in fair value recorded in other comprehensive income (loss) before and after income tax for the periods indicated (dollars in millions): Three Months Ended June 30, 2015 2014 Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Cash flow hedging instruments: Net unrealized loss $ — $ — $ — $ (15 ) $ 6 $ (9 ) Reclassification adjustment for portion of realized loss amortized to net income (1) 1 (1 ) — — — — Other comprehensive income (loss) $ 1 $ (1 ) $ — $ (15 ) $ 6 $ (9 ) Nine Months Ended June 30, 2015 2014 Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Cash flow hedging instruments: Net unrealized loss $ (15 ) $ 5 $ (10 ) $ (24 ) $ 9 $ (15 ) Reclassification adjustment for portion of realized loss amortized to net income (1) 3 (1 ) 2 — — — Other comprehensive loss $ (12 ) $ 4 $ (8 ) $ (24 ) $ 9 $ (15 ) (1) The before tax reclassification adjustment amount and the related tax effect are included in interest on borrowings and provision for income taxes, respectively, on the Condensed Consolidated Statements of Income. The following table presents after-tax changes in accumulated other comprehensive loss (dollars in millions): Three Months Ended June 30, Nine Months Ended June 30, 2015 2014 2015 2014 Cash flow hedging instruments: Beginning balance $ (26 ) $ (6 ) $ (18 ) $ — Other comprehensive loss before reclassification — (9 ) (10 ) (15 ) Amount reclassified from accumulated other comprehensive loss — — 2 — Current period change — (9 ) (8 ) (15 ) Ending balance $ (26 ) $ (15 ) $ (26 ) $ (15 )

Earnings Per Share

Earnings Per Share	9 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The difference between the numerator and denominator used in the computation of basic and diluted earnings per share consists of common stock equivalent shares related to stock-based compensation for all periods presented. There were no material antidilutive awards for the three and nine months ended June 30, 2015 and 2014 .

Related Party Transactions

Related Party Transactions	9 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Transactions with TD and Affiliates As a result of the Company’s acquisition of TD Waterhouse during fiscal 2006, TD became an affiliate of the Company. TD owned approximately 41% of the Company’s common stock as of June 30, 2015 . Pursuant to the Stockholders Agreement among TD, the Company and certain other stockholders, TD has the right to designate five of twelve members of the Company’s board of directors. The Company transacts business and has extensive relationships with TD and certain of its affiliates. Transactions with TD and its affiliates are discussed and summarized below. Insured Deposit Account Agreement The Company is party to an insured deposit account ("IDA") agreement with TD Bank USA, N.A. ("TD Bank USA"), TD Bank, N.A. and TD. Under the IDA agreement, TD Bank USA and TD Bank, N.A. (together, the "TD Depository Institutions") make available to clients of the Company FDIC-insured money market deposit accounts as either designated sweep vehicles or as non-sweep deposit accounts. The Company provides marketing, recordkeeping and support services for the TD Depository Institutions with respect to the money market deposit accounts. In exchange for providing these services, the TD Depository Institutions pay the Company an aggregate marketing fee based on the weighted average yield earned on the client IDA assets, less the actual interest paid to clients, a servicing fee to the TD Depository Institutions and the cost of FDIC insurance premiums. The current IDA agreement became effective as of January 1, 2013 and has an initial term expiring July 1, 2018 . It is automatically renewable for successive five -year terms, provided that it may be terminated by either the Company or the TD Depository Institutions by providing written notice of non-renewal at least two years prior to the initial expiration date or the expiration date of any subsequent renewal period. The fee earned on the IDA agreement is calculated based on two primary components: (a) the yield on fixed-rate "notional" investments, based on prevailing fixed rates for identical balances and maturities in the interest rate swap market (generally LIBOR-based) at the time such investments were added to the IDA portfolio (including any adjustments required to adjust the variable rate leg of such swaps to a one -month reset frequency and the overall swap payment frequency to monthly) and (b) the yield on floating-rate investments. As of June 30, 2015 , the IDA portfolio was comprised of approximately 77% fixed-rate notional investments and 23% floating-rate investments. The IDA agreement provides that the Company may designate amounts and maturity dates for the fixed-rate notional investments in the IDA portfolio, subject to certain limitations. For example, if the Company designates that $100 million of deposits be invested in 5 -year fixed-rate investments, and on the day such investment is confirmed by the TD Depository Institutions the prevailing fixed yield for the applicable 5 -year U.S. dollar LIBOR-based swaps is 1.45% , then the Company will earn a gross fixed yield of 1.45% on that portion of the portfolio (before any deductions for interest paid to clients, the servicing fee to the TD Depository Institutions and the cost of FDIC insurance premiums). In the event that (1) the federal funds effective rate is established at 0.75% or greater and (2) the rate on 5 -year U.S. dollar interest rate swaps is equal to or greater than 1.50% for 20 consecutive business days, then the rate earned by the Company on new fixed-rate notional investments will be reduced by 20% of the excess of the 5 -year U.S. dollar swap rate over 1.50% , up to a maximum of 0.10% . The yield on floating-rate investments is calculated daily based on the greater of the following rates published by the Federal Reserve: (1) the interest rate paid by Federal Reserve Banks on balances held in excess of required reserve balances and contractual clearing balances under Regulation D and (2) the daily effective federal funds rate. The interest rates paid to clients are set by the TD Depository Institutions and are not linked to any index. The servicing fee to the TD Depository Institutions under the IDA agreement is equal to 25 basis points on the aggregate average daily balance in the IDA accounts, subject to adjustment as it relates to deposits of less than or equal to $20 billion kept in floating-rate investments or in fixed-rate notional investments with a maturity of up to 24 months ("short-term fixed-rate investments"). For floating-rate and short-term fixed-rate investments, the servicing fee is equal to the difference of the interest rate earned on the investments less the FDIC premiums paid (in basis points), divided by two. The servicing fee has a floor of 3 basis points (subject to adjustment from time to time to reflect material changes to the TD Depository Institutions’ leverage costs) and a maximum of 25 basis points. In the event the marketing fee computation results in a negative amount, the Company must pay the TD Depository Institutions the negative amount. This effectively results in the Company guaranteeing the TD Depository Institutions revenue equal to the servicing fee on the IDA agreement, plus the reimbursement of FDIC insurance premiums. The marketing fee computation under the IDA agreement is affected by many variables, including the type, duration, principal balance and yield of the fixed-rate and floating-rate investments, the prevailing interest rate environment, the amount of client deposits and the yield paid on client deposits. Because a negative marketing fee computation would arise only if there were extraordinary movements in many of these variables, the maximum potential amount of future payments the Company could be required to make under this arrangement cannot be reasonably estimated. Management believes the potential for the marketing fee calculation to result in a negative amount is remote. Accordingly, no contingent liability is carried on the Condensed Consolidated Balance Sheets for the IDA agreement. In addition, the Company has various other services agreements and transactions with TD and its affiliates. The following tables summarize revenues and expenses resulting from transactions with TD and its affiliates for the periods indicated (dollars in millions): Revenues from TD and Affiliates Statement of Income Classification Three months ended Nine months ended Description 2015 2014 2015 2014 Insured Deposit Account Agreement Insured deposit account fees $ 209 $ 202 $ 620 $ 612 Referral and Strategic Alliance Agreement Various 3 3 9 9 Other Various 2 2 5 5 Total revenues $ 214 $ 207 $ 634 $ 626 Expenses to TD and Affiliates Statement of Income Classification Three months ended Nine months ended Description 2015 2014 2015 2014 Canadian Call Center Services Agreement Professional services $ 5 $ 4 $ 14 $ 13 Other Various — — 2 2 Total expenses $ 5 $ 4 $ 16 $ 15 The following table summarizes the classification and amount of receivables from and payables to TD and its affiliates on the Condensed Consolidated Balance Sheets resulting from related party transactions (dollars in millions): June 30, September 30, Assets: Receivable from brokers, dealers and clearing organizations $ — $ 1 Receivable from affiliates 107 99 Liabilities: Payable to brokers, dealers and clearing organizations $ 67 $ 96 Payable to affiliates 6 5 Receivables from and payables to brokers, dealers and clearing organizations primarily relate to securities borrowing and lending activity and are settled in accordance with customary contractual terms. Receivables from and payables to TD affiliates resulting from client cash sweep activity are generally settled in cash the next business day. Other receivables from and payables to affiliates of TD are generally settled in cash on a monthly basis.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	9 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Financial Information	CONDENSED CONSOLIDATING FINANCIAL INFORMATION The 2019 Notes are jointly and severally and fully and unconditionally guaranteed by TDAOH, a wholly-owned subsidiary of the Company. Presented below is condensed consolidating financial information for the Company, its guarantor subsidiary and its non-guarantor subsidiaries for the periods indicated. Because all other comprehensive income (loss) activity occurred on the parent company for all periods presented, condensed consolidating statements of comprehensive income are not presented. CONDENSED CONSOLIDATING BALANCE SHEET AS OF JUNE 30 , 2015 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) ASSETS Cash and cash equivalents $ 956 $ 2 $ 1,275 $ — $ 2,233 Cash and investments segregated and on deposit for regulatory purposes — — 4,425 — 4,425 Receivable from brokers, dealers and clearing organizations — — 1,144 — 1,144 Receivable from clients, net — — 12,868 — 12,868 Investments in subsidiaries 5,808 5,694 — (11,502 ) — Receivable from affiliates 6 3 104 (6 ) 107 Goodwill — — 2,467 — 2,467 Acquired intangible assets, net — 146 538 — 684 Other, net 116 15 1,157 (57 ) 1,231 Total assets $ 6,886 $ 5,860 $ 23,978 $ (11,565 ) $ 25,159 LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities: Payable to brokers, dealers and clearing organizations $ — $ — $ 2,414 $ — $ 2,414 Payable to clients — — 15,070 — 15,070 Accounts payable and other liabilities 83 — 498 (13 ) 568 Payable to affiliates — — 12 (6 ) 6 Long-term debt 1,810 — — — 1,810 Deferred income taxes — 52 290 (44 ) 298 Total liabilities 1,893 52 18,284 (63 ) 20,166 Stockholders’ equity 4,993 5,808 5,694 (11,502 ) 4,993 Total liabilities and stockholders’ equity $ 6,886 $ 5,860 $ 23,978 $ (11,565 ) $ 25,159 CONDENSED CONSOLIDATING BALANCE SHEET AS OF SEPTEMBER 30, 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) ASSETS Cash and cash equivalents $ 117 $ 2 $ 1,341 $ — $ 1,460 Cash and investments segregated and on deposit for regulatory purposes — — 5,116 — 5,116 Receivable from brokers, dealers and clearing organizations — — 1,108 — 1,108 Receivable from clients, net — — 11,639 — 11,639 Investments in subsidiaries 5,868 5,754 — (11,622 ) — Receivable from affiliates 11 2 97 (11 ) 99 Goodwill — — 2,467 — 2,467 Acquired intangible assets, net — 146 605 — 751 Other, net 156 16 1,073 (54 ) 1,191 Total assets $ 6,152 $ 5,920 $ 23,446 $ (11,687 ) $ 23,831 LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities: Payable to brokers, dealers and clearing organizations $ — $ — $ 2,421 $ — $ 2,421 Payable to clients — — 14,497 — 14,497 Accounts payable and other liabilities 153 — 455 (13 ) 595 Payable to affiliates — — 16 (11 ) 5 Notes payable 150 — — — 150 Long-term debt 1,101 — — — 1,101 Deferred income taxes — 52 303 (41 ) 314 Total liabilities 1,404 52 17,692 (65 ) 19,083 Stockholders’ equity 4,748 5,868 5,754 (11,622 ) 4,748 Total liabilities and stockholders’ equity $ 6,152 $ 5,920 $ 23,446 $ (11,687 ) $ 23,831 CONDENSED CONSOLIDATING STATEMENT OF INCOME THREE MONTHS ENDED JUNE 30 , 2015 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 5 $ — $ 794 $ (5 ) $ 794 Operating expenses 4 — 470 (5 ) 469 Operating income 1 — 324 — 325 Other expense (income) 13 — (7 ) — 6 Income (loss) before income taxes and equity in income of subsidiaries (12 ) — 331 — 319 Provision for (benefit from) income taxes (5 ) — 127 — 122 Income (loss) before equity in income of subsidiaries (7 ) — 204 — 197 Equity in income of subsidiaries 204 204 — (408 ) — Net income $ 197 $ 204 $ 204 $ (408 ) $ 197 CONDENSED CONSOLIDATING STATEMENT OF INCOME THREE MONTHS ENDED JUNE 30 , 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 4 $ — $ 764 $ (5 ) $ 763 Operating expenses 4 — 448 (5 ) 447 Operating income — — 316 — 316 Other expense 6 — — — 6 Income (loss) before income taxes and equity in income of subsidiaries (6 ) — 316 — 310 Provision for (benefit from) income taxes (2 ) — 122 — 120 Income (loss) before equity in income of subsidiaries (4 ) — 194 — 190 Equity in income of subsidiaries 194 194 — (388 ) — Net income $ 190 $ 194 $ 194 $ (388 ) $ 190 CONDENSED CONSOLIDATING STATEMENT OF INCOME NINE MONTHS ENDED JUNE 30 , 2015 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 13 $ — $ 2,415 $ (13 ) $ 2,415 Operating expenses 11 — 1,452 (13 ) 1,450 Operating income 2 — 963 — 965 Other expense (income) 31 — (7 ) — 24 Income (loss) before income taxes and equity in income of subsidiaries (29 ) — 970 — 941 Provision for (benefit from) income taxes (11 ) — 355 — 344 Income (loss) before equity in income of subsidiaries (18 ) — 615 — 597 Equity in income of subsidiaries 615 615 — (1,230 ) — Net income $ 597 $ 615 $ 615 $ (1,230 ) $ 597 CONDENSED CONSOLIDATING STATEMENT OF INCOME NINE MONTHS ENDED JUNE 30 , 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 10 $ — $ 2,328 $ (11 ) $ 2,327 Operating expenses 9 — 1,383 (11 ) 1,381 Operating income 1 — 945 — 946 Other expense 18 — — — 18 Income (loss) before income taxes and equity in income of subsidiaries (17 ) — 945 — 928 Provision for (benefit from) income taxes (13 ) 1 364 — 352 Income (loss) before equity in income of subsidiaries (4 ) (1 ) 581 — 576 Equity in income of subsidiaries 580 573 17 (1,170 ) — Net income $ 576 $ 572 $ 598 $ (1,170 ) $ 576 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS NINE MONTHS ENDED JUNE 30 , 2015 (Unaudited) Parent Guarantor Non-Guarantor Total (In millions) Net cash provided by (used in) operating activities $ (12 ) $ — $ 655 $ 643 Cash flows from investing activities: Purchase of property and equipment — — (58 ) (58 ) Proceeds from sale and maturity of short-term investments 500 — 1 501 Purchase of short-term investments (502 ) — (1 ) (503 ) Proceeds from sale of investments 1 — 9 10 Other — — 3 3 Net cash used in investing activities (1 ) — (46 ) (47 ) Cash flows from financing activities: Proceeds from issuance of long-term debt 1,248 — — 1,248 Payment of debt issuance costs (11 ) — — (11 ) Principal payments on long-term debt (544 ) — — (544 ) Principal payments on notes payable (150 ) — — (150 ) Payment of cash dividends (244 ) — — (244 ) Purchase of treasury stock (148 ) — — (148 ) Other 26 — — 26 Net cash provided by financing activities 177 — — 177 Intercompany investing and financing activities, net 675 — (675 ) — Net increase (decrease) in cash and cash equivalents 839 — (66 ) 773 Cash and cash equivalents at beginning of period 117 2 1,341 1,460 Cash and cash equivalents at end of period $ 956 $ 2 $ 1,275 $ 2,233 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS NINE MONTHS ENDED JUNE 30 , 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Total (In millions) Net cash provided by (used in) operating activities $ (80 ) $ 1 $ 731 $ 652 Cash flows from investing activities: Purchase of property and equipment — — (54 ) (54 ) Proceeds from sale and maturity of short-term investments — — 1 1 Proceeds from sale of investments 13 — — 13 Net cash provided by (used in) investing activities 13 — (53 ) (40 ) Cash flows from financing activities: Proceeds from notes payable 230 — — 230 Principal payments on notes payable (80 ) — — (80 ) Payment of cash dividends (474 ) — — (474 ) Purchase of treasury stock (106 ) — — (106 ) Other 16 — — 16 Net cash used in financing activities (414 ) — — (414 ) Intercompany investing and financing activities, net 455 (5 ) (450 ) — Net increase (decrease) in cash and cash equivalents (26 ) (4 ) 228 198 Cash and cash equivalents at beginning of period 199 7 856 1,062 Cash and cash equivalents at end of period $ 173 $ 3 $ 1,084 $ 1,260

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements ASU 2014-11 — During fiscal 2015, the Company adopted Accounting Standards Update ("ASU") 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures . The amendments in ASU 2014-11 require entities to account for repurchase-to-maturity transactions and linked repurchase financings as secured borrowings, which is consistent with the accounting for other repurchase agreements. The new accounting requirements became effective for the Company on January 1, 2015, and did not result in any accounting changes because the Company does not act as a transferor in repurchase-to-maturity transactions or linked repurchase financings. In addition, the amendments require new disclosures, including information regarding collateral pledged in securities lending transactions and similar transactions that are accounted for as secured borrowings. On April 1, 2015, the Company prospectively adopted the new disclosure requirements related to collateral pledged in transactions that are accounted for as secured borrowings. Adoption of ASU 2014-11 resulted only in certain additional disclosures presented in Note 9.
Loss Contingencies (ASC) 450	ASC 450, Loss Contingencies, governs the recognition and disclosure of loss contingencies, including potential losses from legal and regulatory matters. ASC 450 categorizes loss contingencies using three terms based on the likelihood of occurrence of events that result in a loss: "probable" means that "the future event or events are likely to occur;" "remote" means that "the chance of the future event or events occurring is slight;" and "reasonably possible" means that "the chance of the future event or events occurring is more than remote but less than likely." Under ASC 450, the Company accrues for losses that are considered both probable and reasonably estimable.
Fair Value Measurement (ASC) 820-10	ASC 820-10, Fair Value Measurement , defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. ASC 820-10 establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability, developed based on market data obtained from sources independent of the Company. Unobservable inputs reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability, developed based on the best information available in the circumstances.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements ASU 2014-09 — In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, Revenue from Contracts with Customers , to clarify the principles of recognizing revenue from contracts with customers and to improve financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards. This ASU will supersede the revenue recognition requirements in Accounting Standards Codification ("ASC") Topic 605, Revenue Recognition, and most industry-specific guidance. Entities are required to apply the following steps when recognizing revenue under ASU 2014-09: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and, (5) recognize revenue when (or as) the entity satisfies a performance obligation. This ASU also requires additional disclosures related to the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. An entity may apply the amendments by using one of the following two methods: (1) retrospective application to each prior reporting period presented or (2) a modified retrospective approach, requiring the standard be applied only to the most current period presented, with the cumulative effect of initially applying the standard recognized at the date of initial application. The effective date was recently deferred for one year to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Therefore, ASU 2014-09 will be effective for the Company's fiscal year beginning October 1, 2018. Early adoption is permitted as of the original effective date (annual reporting periods beginning after December 15, 2016). The Company is currently assessing the impact that ASU 2014-09 will have on the Company's financial statements and evaluating which adoption method to apply. ASU 2015-03 — In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs . To simplify the presentation of debt issuance costs, the amendments in ASU 2015-03 require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 requires retrospective application and is effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. Therefore, ASU 2015-03 will be effective for the Company's fiscal year beginning October 1, 2016. Early adoption is permitted. The adoption of ASU 2015-03 will change the location where debt issuance costs are presented in the balance sheet and is not expected to have any other impact on the Company's financial statements. As of June 30, 2015, the Company had debt issuance costs, related to recognized debt liabilities, of approximately $12 million, which are included in other assets on the Condensed Consolidated Balance Sheet.

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	9 Months Ended
	Jun. 30, 2015
Cash and Cash Equivalents [Abstract]
Summary of Cash and Cash Equivalents	The Company’s cash and cash equivalents is summarized in the following table (dollars in millions): June 30, September 30, Corporate $ 1,117 $ 298 Broker-dealer subsidiaries 975 1,090 Futures commission merchant subsidiary 42 — Trust company subsidiary 72 53 Investment advisory subsidiaries 27 19 Total $ 2,233 $ 1,460

Cash and Investments Segregat23

Cash and Investments Segregated and on Deposit for Regulatory Purposes (Tables)	9 Months Ended
	Jun. 30, 2015
Restricted Cash and Investments [Abstract]
Cash and Investments Segregated and on Deposit for Regulatory Purposes	Cash and investments segregated and on deposit for regulatory purposes consists of the following (dollars in millions): June 30, September 30, U.S. government debt securities $ 2,305 $ 3,070 Reverse repurchase agreements (collateralized by U.S. government debt securities) 1,236 1,193 Cash in demand deposit accounts 646 617 Cash on deposit with futures commission merchants 163 186 U.S. government debt securities on deposit with futures commission merchant 75 50 Total $ 4,425 $ 5,116

Notes Payable and Long-Term D24

Notes Payable and Long-Term Debt (Tables)	9 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Schedule of Notes Payable and Long-Term Debt	Notes payable and long-term debt consist of the following (dollars in millions): June 30, 2015 Face Value Unamortized Discount Fair Value Adjustment (1) Net Carrying Value Long-term debt: Senior Notes: 5.600% Notes due 2019 $ 500 $ — $ 33 $ 533 2.950% Notes due 2022 750 (2 ) — 748 3.625% Notes due 2025 500 — 4 504 Secured Loan: Variable-rate Note due 2019 25 — — 25 Total long-term debt $ 1,775 $ (2 ) $ 37 $ 1,810 September 30, 2014 Face Value Unamortized Discount Fair Value Adjustment (1) Net Carrying Value Notes payable: Parent Revolving Facility $ 150 $ — $ — $ 150 Long-term debt: Senior Notes: 4.150% Notes due 2014 500 — 2 502 5.600% Notes due 2019 500 — 30 530 Secured Loan: Variable-rate Note due 2019 69 — — 69 Subtotal – Long-term debt 1,069 — 32 1,101 Total notes payable and long-term debt $ 1,219 $ — $ 32 $ 1,251 (1) Fair value adjustments relate to changes in the fair value of the debt while in a fair value hedging relationship. See " Fair Value Hedging " below.
Gains And Losses Resulting From Changes In Fair Value Of Interest Rate Swaps And Hedged Fixed Rate Debt Table [Text Block]	The following table summarizes gains and losses resulting from changes in the fair value of interest rate swaps designated as fair value hedges and the hedged fixed-rate debt for the periods indicated (dollars in millions): Three Months Ended June 30, Nine Months Ended June 30, 2015 2014 2015 2014 Gain (loss) on fair value of interest rate swaps $ (24 ) $ 1 $ 5 $ (11 ) Gain (loss) on fair value of hedged fixed-rate debt 24 (1 ) (5 ) 11 Net gain (loss) recorded in interest on borrowings $ — $ — $ — $ —
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]	The following table summarizes pre-tax losses resulting from changes in the fair value of the forward-starting interest rate swaps for the periods indicated (dollars in millions): Amount of Loss Recognized in Other Comprehensive Income (Loss) (Effective Portion) Three Months Ended June 30, Nine Months Ended June 30, 2015 2014 2015 2014 Forward-starting interest rate swaps $ — $ (15 ) $ (15 ) $ (24 )
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table summarizes the fair value of outstanding derivatives designated as hedging instruments on the Condensed Consolidated Balance Sheets (dollars in millions): Balance Sheet Location June 30, September 30, Interest rate contracts: Pay-variable interest rate swaps designated as fair value hedges Other assets $ 37 $ 32 Forward-starting interest rate swaps designated as cash flow hedges Accounts payable and other liabilities $ — $ (29 )

Capital Requirements (Tables)

Capital Requirements (Tables)	9 Months Ended
	Jun. 30, 2015
Regulatory Capital Requirements [Abstract]
Net Capital and Net Capital Requirements for Company's Broker-dealer Subsidiaries	Net capital and net capital requirements for the Company’s broker-dealer subsidiaries are summarized in the following tables (dollars in millions): TD Ameritrade Clearing, Inc. Date Net Capital Required Net Capital (2% of Aggregate Debit Balances) Net Capital in Excess of Required Net Capital Net Capital in Excess of Early Warning Threshold (5% of Aggregate Debit Balances) Ratio of Net Capital to Aggregate Debit Balances June 30, 2015 $ 1,533 $ 307 $ 1,226 $ 766 9.99 % September 30, 2014 $ 1,569 $ 280 $ 1,289 $ 868 11.19 % TD Ameritrade, Inc. Date Net Capital Required Net Capital (8% of Total Risk Margin or $250,000 Minimum Dollar Requirement) Net Capital in Excess of Required Net Capital Net Capital in Excess of Early Warning Threshold (110% or 120% of Required Net Capital) June 30, 2015 $ 264 $ — $ 264 $ 263 September 30, 2014 $ 347 $ 17 $ 330 $ 328
Net Capital and Net Capital Requirements for Company's FCM Subsidiary	During October 2014, TDAFF registered as an FCM with the CFTC. TDAFF is subject to CFTC Regulation 1.17 under the Commodity Exchange Act, which requires the maintenance of minimum net capital as described above. Net capital and net capital requirements for TDAFF are summarized in the following table (dollars in millions): TD Ameritrade Futures & Forex LLC Date Net Capital Required Net Capital in Excess of Required Net Capital Net Capital in Excess of Early Warning Threshold (110% of Required Net Capital) June 30, 2015 $ 57 $ 11 46 $ 45 September 30, 2014 N/A N/A N/A N/A

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Collateral Available, Loaned or Repledged	The following table summarizes the fair values of client margin securities and stock borrowings that were available to the Company to utilize as collateral on various borrowings or for other purposes, and the amount of that collateral loaned or repledged by the Company (dollars in billions): June 30, September 30, Client margin securities $ 17.9 $ 16.2 Stock borrowings 0.8 1.0 Total collateral available $ 18.7 $ 17.2 Collateral loaned $ 2.4 $ 2.4 Collateral repledged 2.7 2.5 Total collateral loaned or repledged $ 5.1 $ 4.9
Summary of Cash Deposited with and Securities Pledged to Clearinghouses	The following table summarizes cash deposited with and securities pledged to clearinghouses by the Company (dollars in millions): Assets Balance Sheet Classification June 30, September 30, Cash Receivable from brokers, dealers and clearing organizations $ 284 $ 104 U.S. government debt securities Securities owned, at fair value 185 181 Total $ 469 $ 285

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Hierarchy for Assets and Liabilities Measured on Recurring Basis	The following tables present the Company’s fair value hierarchy for assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and September 30, 2014 (dollars in millions): As of June 30, 2015 Level 1 Level 2 Level 3 Fair Value Assets: Cash equivalents: Money market mutual funds $ 2,048 $ — $ — $ 2,048 Investments segregated for regulatory purposes: U.S. government debt securities — 2,380 — 2,380 Securities owned: Money market and other mutual funds — — 2 2 U.S. government debt securities — 406 — 406 Other 1 3 — 4 Subtotal - Securities owned 1 409 2 412 Other assets: Pay-variable interest rate swaps (1) — 37 — 37 U.S. government debt securities — 4 — 4 Auction rate securities — — 1 1 Subtotal - Other assets — 41 1 42 Total assets at fair value $ 2,049 $ 2,830 $ 3 $ 4,882 Liabilities: Accounts payable and other liabilities: Securities sold, not yet purchased: Equity securities $ 13 $ — $ — $ 13 (1) See " Fair Value Hedging " in Note 5 for details. As of September 30, 2014 Level 1 Level 2 Level 3 Fair Value Assets: Cash equivalents: Money market mutual funds $ 1,284 $ — $ — $ 1,284 Investments segregated for regulatory purposes: U.S. government debt securities — 3,120 — 3,120 Securities owned: Money market and other mutual funds — — 1 1 U.S. government debt securities — 326 — 326 Other 2 3 — 5 Subtotal - Securities owned 2 329 1 332 Other assets: Pay-variable interest rate swaps (1) — 32 — 32 U.S. government debt securities — 4 — 4 Auction rate securities — — 1 1 Subtotal - Other assets — 36 1 37 Total assets at fair value $ 1,286 $ 3,485 $ 2 $ 4,773 Liabilities: Accounts payable and other liabilities: Forward-starting interest rate swaps (2) $ — $ 29 $ — $ 29 Securities sold, not yet purchased: Equity securities 1 — — 1 Total liabilities at fair value $ 1 $ 29 $ — $ 30 (1) See " Fair Value Hedging " in Note 5 for details. (2) See " Cash Flow Hedging " in Note 5 for details.

Offsetting Assets and Liabili28

Offsetting Assets and Liabilities (Tables)	9 Months Ended
	Jun. 30, 2015
Offsetting [Abstract]
Effect of Rights of Setoff Associated with Company's Recognized Assets and Liabilities	The following tables present information about the potential effect of rights of setoff associated with the Company’s recognized assets and liabilities as of June 30, 2015 and September 30, 2014 (dollars in millions): June 30, 2015 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Assets and Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts Presented in the Condensed Consolidated Balance Sheet Financial Instruments (4) Collateral Received or Pledged (Including Cash) (5) Net Amount (6) Assets: Investments segregated for regulatory purposes: Reverse repurchase agreements $ 1,236 $ — $ 1,236 $ — $ (1,236 ) $ — Receivable from brokers, dealers and clearing organizations: Deposits paid for securities borrowed (1) 846 — 846 (54 ) (776 ) 16 Other assets: Pay-variable interest rate swaps 37 — 37 — (37 ) — Total $ 2,119 $ — $ 2,119 $ (54 ) $ (2,049 ) $ 16 Liabilities: Payable to brokers, dealers and clearing organizations: Deposits received for securities loaned (2)(3) $ 2,363 $ — $ 2,363 $ (54 ) $ (2,065 ) $ 244 September 30, 2014 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Assets and Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts Presented in the Condensed Consolidated Balance Sheet Financial Instruments (4) Collateral Received or Pledged (Including Cash) (5) Net Amount (6) Assets: Investments segregated for regulatory purposes: Reverse repurchase agreements $ 1,193 $ — $ 1,193 $ — $ (1,193 ) $ — Receivable from brokers, dealers Deposits paid for securities borrowed (1) 995 — 995 (69 ) (900 ) 26 Other assets: Pay-variable interest rate swaps 32 — 32 — (32 ) — Total $ 2,220 $ — $ 2,220 $ (69 ) $ (2,125 ) $ 26 Liabilities: Payable to brokers, dealers and clearing organizations: Deposits received for securities loaned (2) $ 2,384 $ — $ 2,384 $ (69 ) $ (2,015 ) $ 300 Accounts payable and other liabilities: Forward-starting interest rate swaps 29 — 29 — (29 ) — Total $ 2,413 $ — $ 2,413 $ (69 ) $ (2,044 ) $ 300 (1) Included in the gross amounts of deposits paid for securities borrowed is $499 million and $616 million as of June 30, 2015 and September 30, 2014 , respectively, transacted through a risk-sharing program with the OCC, which guarantees the return of cash to the Company. See "General Contingencies" in Note 7 for a discussion of the potential risks associated with securities borrowing transactions and how the Company mitigates those risks. (2) Included in the gross amounts of deposits received for securities loaned is $685 million and $754 million as of June 30, 2015 and September 30, 2014 , respectively, transacted through a risk-sharing program with the OCC, which guarantees the return of securities to the Company. See "General Contingencies" in Note 7 for a discussion of the potential risks associated with securities lending transactions and how the Company mitigates those risks. (3) Substantially all of the Company's securities lending transactions have a continuous contractual term and, upon notice by either party, may be terminated within three business days. The following table summarizes the Company's gross liability for securities lending transactions by the class of securities loaned (dollars in millions): June 30, 2015 Deposits received for securities loaned: Equity securities $ 2,132 Exchange-traded funds 137 Closed-end funds 57 Other 37 Total $ 2,363 (4) Amounts represent recognized assets and liabilities that are subject to enforceable master agreements with rights of setoff. (5) Represents the fair value of collateral the Company had received or pledged under enforceable master agreements, limited for table presentation purposes to the net amount of the recognized assets due from or liabilities due to each counterparty. At June 30, 2015 and September 30, 2014 , the Company had received total collateral with a fair value of $2,128 million and $2,231 million , respectively, and pledged total collateral with a fair value of $2,117 million and $2,124 million , respectively. (6) Represents the amount for which, in the case of net recognized assets, the Company had not received collateral, and in the case of net recognized liabilities, the Company had not pledged collate
Disaggregation of Gross Secured Lending Transactions	The following table summarizes the Company's gross liability for securities lending transactions by the class of securities loaned (dollars in millions): June 30, 2015 Deposits received for securities loaned: Equity securities $ 2,132 Exchange-traded funds 137 Closed-end funds 57 Other 37 Total $ 2,363

Accumulated Other Comprehensi29

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Abstract]
Comprehensive Income (Loss)	The following tables present the net change in fair value recorded in other comprehensive income (loss) before and after income tax for the periods indicated (dollars in millions): Three Months Ended June 30, 2015 2014 Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Cash flow hedging instruments: Net unrealized loss $ — $ — $ — $ (15 ) $ 6 $ (9 ) Reclassification adjustment for portion of realized loss amortized to net income (1) 1 (1 ) — — — — Other comprehensive income (loss) $ 1 $ (1 ) $ — $ (15 ) $ 6 $ (9 ) Nine Months Ended June 30, 2015 2014 Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Cash flow hedging instruments: Net unrealized loss $ (15 ) $ 5 $ (10 ) $ (24 ) $ 9 $ (15 ) Reclassification adjustment for portion of realized loss amortized to net income (1) 3 (1 ) 2 — — — Other comprehensive loss $ (12 ) $ 4 $ (8 ) $ (24 ) $ 9 $ (15 ) (1) The before tax reclassification adjustment amount and the related tax effect are included in interest on borrowings and provision for income taxes, respectively, on the Condensed Consolidated Statements of Income.
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents after-tax changes in accumulated other comprehensive loss (dollars in millions): Three Months Ended June 30, Nine Months Ended June 30, 2015 2014 2015 2014 Cash flow hedging instruments: Beginning balance $ (26 ) $ (6 ) $ (18 ) $ — Other comprehensive loss before reclassification — (9 ) (10 ) (15 ) Amount reclassified from accumulated other comprehensive loss — — 2 — Current period change — (9 ) (8 ) (15 ) Ending balance $ (26 ) $ (15 ) $ (26 ) $ (15 )

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Schedule of Related Party Transactions [Table Text Block]	The following tables summarize revenues and expenses resulting from transactions with TD and its affiliates for the periods indicated (dollars in millions): Revenues from TD and Affiliates Statement of Income Classification Three months ended Nine months ended Description 2015 2014 2015 2014 Insured Deposit Account Agreement Insured deposit account fees $ 209 $ 202 $ 620 $ 612 Referral and Strategic Alliance Agreement Various 3 3 9 9 Other Various 2 2 5 5 Total revenues $ 214 $ 207 $ 634 $ 626 Expenses to TD and Affiliates Statement of Income Classification Three months ended Nine months ended Description 2015 2014 2015 2014 Canadian Call Center Services Agreement Professional services $ 5 $ 4 $ 14 $ 13 Other Various — — 2 2 Total expenses $ 5 $ 4 $ 16 $ 15 The following table summarizes the classification and amount of receivables from and payables to TD and its affiliates on the Condensed Consolidated Balance Sheets resulting from related party transactions (dollars in millions): June 30, September 30, Assets: Receivable from brokers, dealers and clearing organizations $ — $ 1 Receivable from affiliates 107 99 Liabilities: Payable to brokers, dealers and clearing organizations $ 67 $ 96 Payable to affiliates 6 5

Condensed Consolidating Finan31

Condensed Consolidating Financial Information (Tables)	9 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Condensed Consolidating Balance Sheet (Unaudited)	CONDENSED CONSOLIDATING BALANCE SHEET AS OF JUNE 30 , 2015 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) ASSETS Cash and cash equivalents $ 956 $ 2 $ 1,275 $ — $ 2,233 Cash and investments segregated and on deposit for regulatory purposes — — 4,425 — 4,425 Receivable from brokers, dealers and clearing organizations — — 1,144 — 1,144 Receivable from clients, net — — 12,868 — 12,868 Investments in subsidiaries 5,808 5,694 — (11,502 ) — Receivable from affiliates 6 3 104 (6 ) 107 Goodwill — — 2,467 — 2,467 Acquired intangible assets, net — 146 538 — 684 Other, net 116 15 1,157 (57 ) 1,231 Total assets $ 6,886 $ 5,860 $ 23,978 $ (11,565 ) $ 25,159 LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities: Payable to brokers, dealers and clearing organizations $ — $ — $ 2,414 $ — $ 2,414 Payable to clients — — 15,070 — 15,070 Accounts payable and other liabilities 83 — 498 (13 ) 568 Payable to affiliates — — 12 (6 ) 6 Long-term debt 1,810 — — — 1,810 Deferred income taxes — 52 290 (44 ) 298 Total liabilities 1,893 52 18,284 (63 ) 20,166 Stockholders’ equity 4,993 5,808 5,694 (11,502 ) 4,993 Total liabilities and stockholders’ equity $ 6,886 $ 5,860 $ 23,978 $ (11,565 ) $ 25,159 CONDENSED CONSOLIDATING BALANCE SHEET AS OF SEPTEMBER 30, 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) ASSETS Cash and cash equivalents $ 117 $ 2 $ 1,341 $ — $ 1,460 Cash and investments segregated and on deposit for regulatory purposes — — 5,116 — 5,116 Receivable from brokers, dealers and clearing organizations — — 1,108 — 1,108 Receivable from clients, net — — 11,639 — 11,639 Investments in subsidiaries 5,868 5,754 — (11,622 ) — Receivable from affiliates 11 2 97 (11 ) 99 Goodwill — — 2,467 — 2,467 Acquired intangible assets, net — 146 605 — 751 Other, net 156 16 1,073 (54 ) 1,191 Total assets $ 6,152 $ 5,920 $ 23,446 $ (11,687 ) $ 23,831 LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities: Payable to brokers, dealers and clearing organizations $ — $ — $ 2,421 $ — $ 2,421 Payable to clients — — 14,497 — 14,497 Accounts payable and other liabilities 153 — 455 (13 ) 595 Payable to affiliates — — 16 (11 ) 5 Notes payable 150 — — — 150 Long-term debt 1,101 — — — 1,101 Deferred income taxes — 52 303 (41 ) 314 Total liabilities 1,404 52 17,692 (65 ) 19,083 Stockholders’ equity 4,748 5,868 5,754 (11,622 ) 4,748 Total liabilities and stockholders’ equity $ 6,152 $ 5,920 $ 23,446 $ (11,687 ) $ 23,831
Schedule of Condensed Consolidating Statement of Income (Unaudited)	CONDENSED CONSOLIDATING STATEMENT OF INCOME THREE MONTHS ENDED JUNE 30 , 2015 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 5 $ — $ 794 $ (5 ) $ 794 Operating expenses 4 — 470 (5 ) 469 Operating income 1 — 324 — 325 Other expense (income) 13 — (7 ) — 6 Income (loss) before income taxes and equity in income of subsidiaries (12 ) — 331 — 319 Provision for (benefit from) income taxes (5 ) — 127 — 122 Income (loss) before equity in income of subsidiaries (7 ) — 204 — 197 Equity in income of subsidiaries 204 204 — (408 ) — Net income $ 197 $ 204 $ 204 $ (408 ) $ 197 CONDENSED CONSOLIDATING STATEMENT OF INCOME THREE MONTHS ENDED JUNE 30 , 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 4 $ — $ 764 $ (5 ) $ 763 Operating expenses 4 — 448 (5 ) 447 Operating income — — 316 — 316 Other expense 6 — — — 6 Income (loss) before income taxes and equity in income of subsidiaries (6 ) — 316 — 310 Provision for (benefit from) income taxes (2 ) — 122 — 120 Income (loss) before equity in income of subsidiaries (4 ) — 194 — 190 Equity in income of subsidiaries 194 194 — (388 ) — Net income $ 190 $ 194 $ 194 $ (388 ) $ 190 CONDENSED CONSOLIDATING STATEMENT OF INCOME NINE MONTHS ENDED JUNE 30 , 2015 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 13 $ — $ 2,415 $ (13 ) $ 2,415 Operating expenses 11 — 1,452 (13 ) 1,450 Operating income 2 — 963 — 965 Other expense (income) 31 — (7 ) — 24 Income (loss) before income taxes and equity in income of subsidiaries (29 ) — 970 — 941 Provision for (benefit from) income taxes (11 ) — 355 — 344 Income (loss) before equity in income of subsidiaries (18 ) — 615 — 597 Equity in income of subsidiaries 615 615 — (1,230 ) — Net income $ 597 $ 615 $ 615 $ (1,230 ) $ 597 CONDENSED CONSOLIDATING STATEMENT OF INCOME NINE MONTHS ENDED JUNE 30 , 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Eliminations Total (In millions) Net revenues $ 10 $ — $ 2,328 $ (11 ) $ 2,327 Operating expenses 9 — 1,383 (11 ) 1,381 Operating income 1 — 945 — 946 Other expense 18 — — — 18 Income (loss) before income taxes and equity in income of subsidiaries (17 ) — 945 — 928 Provision for (benefit from) income taxes (13 ) 1 364 — 352 Income (loss) before equity in income of subsidiaries (4 ) (1 ) 581 — 576 Equity in income of subsidiaries 580 573 17 (1,170 ) — Net income $ 576 $ 572 $ 598 $ (1,170 ) $ 576
Schedule of Condensed Consolidating Statement of Cash Flows (Unaudited)	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS NINE MONTHS ENDED JUNE 30 , 2015 (Unaudited) Parent Guarantor Non-Guarantor Total (In millions) Net cash provided by (used in) operating activities $ (12 ) $ — $ 655 $ 643 Cash flows from investing activities: Purchase of property and equipment — — (58 ) (58 ) Proceeds from sale and maturity of short-term investments 500 — 1 501 Purchase of short-term investments (502 ) — (1 ) (503 ) Proceeds from sale of investments 1 — 9 10 Other — — 3 3 Net cash used in investing activities (1 ) — (46 ) (47 ) Cash flows from financing activities: Proceeds from issuance of long-term debt 1,248 — — 1,248 Payment of debt issuance costs (11 ) — — (11 ) Principal payments on long-term debt (544 ) — — (544 ) Principal payments on notes payable (150 ) — — (150 ) Payment of cash dividends (244 ) — — (244 ) Purchase of treasury stock (148 ) — — (148 ) Other 26 — — 26 Net cash provided by financing activities 177 — — 177 Intercompany investing and financing activities, net 675 — (675 ) — Net increase (decrease) in cash and cash equivalents 839 — (66 ) 773 Cash and cash equivalents at beginning of period 117 2 1,341 1,460 Cash and cash equivalents at end of period $ 956 $ 2 $ 1,275 $ 2,233 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS NINE MONTHS ENDED JUNE 30 , 2014 (Unaudited) Parent Guarantor Subsidiary Non-Guarantor Subsidiaries Total (In millions) Net cash provided by (used in) operating activities $ (80 ) $ 1 $ 731 $ 652 Cash flows from investing activities: Purchase of property and equipment — — (54 ) (54 ) Proceeds from sale and maturity of short-term investments — — 1 1 Proceeds from sale of investments 13 — — 13 Net cash provided by (used in) investing activities 13 — (53 ) (40 ) Cash flows from financing activities: Proceeds from notes payable 230 — — 230 Principal payments on notes payable (80 ) — — (80 ) Payment of cash dividends (474 ) — — (474 ) Purchase of treasury stock (106 ) — — (106 ) Other 16 — — 16 Net cash used in financing activities (414 ) — — (414 ) Intercompany investing and financing activities, net 455 (5 ) (450 ) — Net increase (decrease) in cash and cash equivalents (26 ) (4 ) 228 198 Cash and cash equivalents at beginning of period 199 7 856 1,062 Cash and cash equivalents at end of period $ 173 $ 3 $ 1,084 $ 1,260

Cash and Cash Equivalents - Sum

Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 2,233	$ 1,460	$ 1,260	$ 1,062
Corporate [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	1,117	298
Broker-dealer subsidiaries [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	975	1,090
Futures commission merchant subsidiary [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	42	0
Trust company subsidiary [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	72	53
Investment advisory subsidiaries [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 27	$ 19

Cash and Investments Segregat33

Cash and Investments Segregated and on Deposit for Regulatory Purposes (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes	$ 4,425	$ 5,116
U.S. Government Debt Securities [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes	2,305	3,070
Reverse Repurchase Agreements (collateralized by U.S. government debt securities) [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes	1,236	1,193
Cash in Demand Deposit Accounts [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes	646	617
Cash on Deposit with Futures Commission Merchant [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes	163	186
U.S. Government Debt Securities on Deposit with Futures Commission Merchant [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes	$ 75	$ 50

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate	36.60%	37.90%
Favorable resolutions of certain income tax matters	$ 20	$ 9
Unfavorable deferred income tax adjustments		$ 2
Favorable per share impact on earnings	$ 0.04	$ 0.01

Notes Payable and Long-Term D35

Notes Payable and Long-Term Debt - Schedule of Notes Payable and Long Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Face Value		$ 1,219
Fair Value Adjustment		32
Net Carrying Value		1,251
2.950% Notes due 2022 [Member]
Debt Instrument [Line Items]
Face Value	$ 750
3.625% Notes due 2025 [Member]
Debt Instrument [Line Items]
Face Value	500
Notes Payable Parent Revolving Facility [Member]
Debt Instrument [Line Items]
Face Value		150
Net Carrying Value		150
Long-term Debt [Member]
Debt Instrument [Line Items]
Face Value	1,775	1,069
Unamortized Discount	(2)
Fair Value Adjustment	37	32
Net Carrying Value	1,810	1,101
Long-term Debt [Member] | 4.150% Notes due 2014 [Member]
Debt Instrument [Line Items]
Face Value		500
Fair Value Adjustment		2
Net Carrying Value		502
Long-term Debt [Member] | 5.600% Notes due 2019 [Member]
Debt Instrument [Line Items]
Face Value	500	500
Fair Value Adjustment	33	30
Net Carrying Value	533	530
Long-term Debt [Member] | 2.950% Notes due 2022 [Member]
Debt Instrument [Line Items]
Face Value	750
Unamortized Discount	(2)
Net Carrying Value	748
Long-term Debt [Member] | 3.625% Notes due 2025 [Member]
Debt Instrument [Line Items]
Face Value	500
Fair Value Adjustment	4
Net Carrying Value	504
Long-term Debt [Member] | Variable-Rate Note due 2019 [Member]
Debt Instrument [Line Items]
Face Value	25	69
Net Carrying Value	$ 25	$ 69

Notes Payable and Long-Term D36

Notes Payable and Long-Term Debt - Senior Notes (Detail) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Face Value		$ 1,219
4.150% Notes due 2014 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.15%
Debt Instrument, Maturity Date	Dec. 1, 2014
3.625% Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Offering Date	Oct. 17, 2014
Face Value	$ 500
Debt Instrument, Interest Rate, Stated Percentage	3.625%
Debt Instrument, Maturity Date	Apr. 1, 2025
2.950% Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Offering Date	Mar. 4, 2015
Face Value	$ 750
Debt Instrument, Interest Rate, Stated Percentage	2.95%
Debt Instrument, Maturity Date	Apr. 1, 2022

Notes Payable and Long-Term D37

Notes Payable and Long-Term Debt - Fair Value Hedging - Additional Information (Detail) - Jun. 30, 2015 - USD ($)	Total
5.600% Notes due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	5.60%
Due date of Senior Notes	Dec. 1, 2019
3.625% Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	3.625%
Due date of Senior Notes	Apr. 1, 2025
2019 and 2025 Notes [Member]
Debt Instrument [Line Items]
Weighted-average effective interest rate	2.02%
Pay Variable Interest Rate Swap [Member]
Debt Instrument [Line Items]
Notional amount of interest rate swaps on Notes	$ 500,000,000
Debt Instrument, Description of Variable Rate Basis	three-month LIBOR
Pay Variable Interest Rate Swap [Member] | 5.600% Notes due 2019 [Member]
Debt Instrument [Line Items]
Variable interest rate on swaps in excess of LIBOR rate, percentage	2.3745%
Pay Variable Interest Rate Swap [Member] | 3.625% Notes due 2025 [Member]
Debt Instrument [Line Items]
Variable interest rate on swaps in excess of LIBOR rate, percentage	1.1022%

Notes Payable and Long-Term D38

Notes Payable and Long-Term Debt - Gains and Losses Resulting from Changes in Fair Value of Interest Rate Swaps and Hedged Fixed Rate Debt (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Debt Disclosure [Abstract]
Gain (loss) on fair value of interest rate swaps	$ (24)	$ 1	$ 5	$ (11)
Gain (loss) on fair value of hedged fixed-rate debt	24	(1)	(5)	11
Net gain (loss) recorded in interest on borrowings	$ 0	$ 0	$ 0	$ 0

Notes Payable and Long-term D39

Notes Payable and Long-term Debt - Cash Flow Hedging - Additional Information (Details) - USD ($)	Jan. 17, 2014	Jun. 30, 2015	Oct. 17, 2014	Sep. 30, 2014
Debt Instrument [Line Items]
Face Value				$ 1,219,000,000
Forward Starting Interest Rate Swap [Member]
Debt Instrument [Line Items]
Forward-starting interest rate swap contract settlement date range - start	Jan. 17, 2014
Aggregate notional amount of forward-starting interest rate swap contracts	$ 500,000,000
Amount Paid To Settle Forward Starting Interest Rate Swap Contracts			$ 45,000,000
Loss on Cash Flow Hedge Ineffectiveness		$ 500,000
Amount of Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		$ 4,400,000
Description of Reclassification of Interest Rate Cash Flow Hedge Gain (Loss)		12 months
3.625% Notes due 2025 [Member]
Debt Instrument [Line Items]
Face Value		$ 500,000,000

Notes Payable and Long-Term D40

Notes Payable and Long-Term Debt - Effective Portion of Cash Flow Hedge (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Forward Starting Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 0	$ (15)	$ (15)	$ (24)

Notes Payable and Long-Term D41

Notes Payable and Long-Term Debt - Fair Value of Outstanding Derivatives Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Derivatives recorded under the caption Other assets
Pay-variable interest rate swaps designated as fair value hedges	$ 37	$ 32
Derivatives recorded under the caption Accounts Payable And Other Liabilities
Forward-starting interest rate swaps designated as cash flow hedges	$ 0	$ (29)

Notes Payable and Long-Term D42

Notes Payable and Long-Term Debt - Balance Sheet Impact of Hedging Instruments - Additional Information (Details) - Cash [Member] - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Forward Starting Interest Rate Swap [Member]
Debt Instrument [Line Items]
Pledged Collateral To The Interest Rate Swap Counterparty Aggregate Fair Value		$ 43
Pay Variable Interest Rate Swap [Member]
Debt Instrument [Line Items]
Pledged Collateral From Interest Rate Swap Counter Party Aggregate Fair Value	$ 39	$ 47

Notes Payable and Long-term D43

Notes Payable and Long-term Debt - Credit Agreements - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014	Jun. 11, 2014
Debt Instrument [Line Items]
Notes payable	$ 0	$ 150,000,000
TD Ameritrade Holding Corporation [Member]
Debt Instrument [Line Items]
Notes payable		$ 150,000,000
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date	Jun. 11, 2014
Line of credit facility maximum borrowing capacity			$ 300,000,000
Line of credit facility expiration date	Jun. 11, 2019
Interest rate margin	1.00%
Debt instrument basis spread on variable rate	one-month LIBOR	one-month LIBOR
Line of Credit Facility, Commitment Fee Percentage	0.15%	0.15%
Notes payable	$ 0	$ 150,000,000
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.10%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.25%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Interest rate margin	0.50%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate margin	1.25%	1.25%
Senior unsecured revolving credit facility, interest rate at period end		1.40%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate margin	0.875%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate margin	1.75%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest rate margin	0.25%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate margin	0.00%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Holding Corporation [Member] | Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate margin	0.75%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date	Jun. 11, 2014
Line of credit facility maximum borrowing capacity			$ 300,000,000
Line of credit facility expiration date	Jun. 11, 2019
Line of Credit Facility, Commitment Fee Percentage	0.125%
Notes payable	$ 0	$ 0
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.08%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.20%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Interest rate margin	1.00%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | Federal Funds Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate margin	0.75%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | Federal Funds Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate margin	1.50%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate margin	1.00%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate margin	0.75%
Senior Unsecured Revolving Credit Facility [Member] | TD Ameritrade Clearing, Inc. [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate margin	1.50%
Intercompany Credit Agreements [Member]
Debt Instrument [Line Items]
Borrowings outstanding under intercompany credit agreements	$ 0
Intercompany Credit Agreements [Member] | TD Ameritrade Clearing, Inc. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date	Mar. 31, 2015
Line of credit facility maximum borrowing capacity	$ 700,000,000
Line of credit facility expiration date	Mar. 1, 2022
Line Of Credit Facility Maximum Lending Capacity	$ 300,000,000
Intercompany Credit Agreements [Member] | TD Ameritrade, Inc. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date	Mar. 31, 2015
Line of credit facility maximum borrowing capacity	$ 50,000,000
Line of credit facility expiration date	Mar. 1, 2022
Line Of Credit Facility Maximum Lending Capacity	$ 300,000,000
Intercompany Credit Agreements [Member] | TD Ameritrade Futures & Forex LLC [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date	Mar. 29, 2015
Debt Instrument, Term	5 years
Prior Notice Of Intent To Terminate	30 days
Line Of Credit Facility Percentage Of Residual Interest Target	75.00%
Line Of Credit Facility Residual Interest Target	$ 18,000,000
Line of Credit Facility, Current Borrowing Capacity	$ 13,500,000
Line Of Credit Facility Calendar Days After Borrowing Date Loans Due	60 days
Intercompany Credit Agreements [Member] | TD Ameritrade Futures & Forex LLC [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Interest rate margin	1.00%

Capital Requirements - Net Capi

Capital Requirements - Net Capital and Net Capital Requirements for Company's Subsidiaries (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
TD Ameritrade Clearing, Inc. [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Net Capital	$ 1,533	$ 1,569
Required Net Capital	307	280
Excess Net Capital	1,226	1,289
Net Capital in Excess of Early Warning Threshold	$ 766	$ 868
Ratio of Net Capital to Aggregate Debit Balances	9.99%	11.19%
TD Ameritrade, Inc. [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Net Capital	$ 264	$ 347
Required Net Capital	0	17
Excess Net Capital	264	330
Net Capital in Excess of Early Warning Threshold	263	$ 328
TD Ameritrade Futures & Forex LLC [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Net Capital under Commodity Exchange Act	57
Required Net Capital under Commodity Exchange Act	11
Net Capital in Excess of Required Net Capital	46
Net Capital in Excess of Early Warning Threshold	$ 45

Capital Requirements - Addition

Capital Requirements - Additional Information (Detail) - USD ($)	Jun. 30, 2015	Sep. 30, 2014
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Percentage of net capital to aggregate debit balances required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees	5.00%
Percentage of net capital to the Company's risk based capital requirement required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees	110.00%
Percentage of net capital to the Company's minimum dollar requirement required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees	120.00%
Percentage of net capital to the Company's risk-based capital requirement required for a futures commission merchant to provide notice to its regulator.	110.00%
Percentage of net capital to the Company's minimum dollar requirement required for a futures commission merchant to provide notice to its regulator.	150.00%
TD Ameritrade Trust Company's Tier 1 capital	$ 30,000,000	$ 27,000,000
Amount in excess of required Tier 1 capital	14,000,000	$ 12,000,000
TD Ameritrade Clearing, Inc. [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Minimum net capital required	$ 1,500,000
Percentage of aggregate debit balances required as minimum net capital	2.00%
TD Ameritrade, Inc. [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Minimum net capital required	$ 250,000
Percentage of aggregate debit balances required as minimum net capital	2.00%
Net capital required under Regulation 1.17 of the Commodity Exchange Act	$ 1,000,000
Minimum percentage of the total risk margin requirements for all positions carried in non-client accounts to be added to the minimum percentage of the total risk margin requirements for all positions carried in client accounts for minimum net capital calculation	8.00%
Minimum percentage of the total risk margin requirements for all positions carried in client accounts to be added to the minimum percentage of the total risk margin requirements for all positions carried in non-client accounts for minimum net capital calculation	8.00%
TD Ameritrade Futures & Forex LLC [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Net capital required under Regulation 1.17 of the Commodity Exchange Act	$ 1,000,000
Minimum percentage of the total risk margin requirements for all positions carried in non-client accounts to be added to the minimum percentage of the total risk margin requirements for all positions carried in client accounts for minimum net capital calculation	8.00%
Minimum percentage of the total risk margin requirements for all positions carried in client accounts to be added to the minimum percentage of the total risk margin requirements for all positions carried in non-client accounts for minimum net capital calculation	8.00%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Mar. 26, 2015	Sep. 30, 2008	Jun. 30, 2015	Sep. 30, 2014
Contingencies And Commitments [Line Items]
Yield Plus Fund's stated objective to maintain a per share net asset value		$ 1
Company Cash Contribution Toward Class Settlement Fund	$ 3,750,000
Contingent liability for guarantees to securities clearinghouses and exchanges			$ 0	$ 0
Minimum [Member]
Contingencies And Commitments [Line Items]
Aggregate range of reasonably possible losses in excess of amounts accrued			0
Maximum [Member]
Contingencies And Commitments [Line Items]
Aggregate range of reasonably possible losses in excess of amounts accrued			$ 35,000,000

Commitments and Contingencies47

Commitments and Contingencies - Collateral Available, Loaned or Repledged (Detail) - USD ($) $ in Billions	Jun. 30, 2015	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Client margin securities	$ 17.9	$ 16.2
Stock borrowings	0.8	1
Total collateral available	18.7	17.2
Collateral loaned	2.4	2.4
Collateral repledged	2.7	2.5
Total collateral loaned or repledged	$ 5.1	$ 4.9

Commitments and Contingencies48

Commitments and Contingencies - Summary of Cash Deposited with and Securities Pledged to Clearinghouses (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Cash Deposited with and Securities Pledged to Clearinghouses [Line Items]
Cash deposited and securities pledged	$ 469	$ 285
Cash [Member] | Receivable from brokers, dealers and clearing organizations [Member]
Cash Deposited with and Securities Pledged to Clearinghouses [Line Items]
Cash deposited and securities pledged	284	104
U.S. Government Debt Securities [Member] | Securities owned [Member]
Cash Deposited with and Securities Pledged to Clearinghouses [Line Items]
Cash deposited and securities pledged	$ 185	$ 181

Fair Value Disclosures - Fair V

Fair Value Disclosures - Fair Value Hierarchy for Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013
Assets:
Cash equivalents	$ 2,233	$ 1,460	$ 1,260	$ 1,062
Investments segregated for regulatory purposes	4,425	5,116
Securities owned	412	332
Liabilities:
Accounts payable and other liabilities	568	595
Fair Value, Measurements, Recurring [Member]
Assets:
Securities owned	412	332
Other assets	42	37
Total assets at fair value	4,882	4,773
Liabilities:
Total liabilities at fair value		30
Fair Value, Measurements, Recurring [Member] | Money Market Mutual Funds [Member]
Assets:
Cash equivalents	2,048	1,284
Fair Value, Measurements, Recurring [Member] | U.S. Government Debt Securities [Member]
Assets:
Investments segregated for regulatory purposes	2,380	3,120
Securities owned	406	326
Other assets	4	4
Fair Value, Measurements, Recurring [Member] | Money Market and Other Mutual Funds [Member]
Assets:
Securities owned	2	1
Fair Value, Measurements, Recurring [Member] | Other Securities [Member]
Assets:
Securities owned	4	5
Fair Value, Measurements, Recurring [Member] | Pay Variable Interest Rate Swap [Member]
Assets:
Other assets	37	32
Fair Value, Measurements, Recurring [Member] | Auction Rate Securities [Member]
Assets:
Other assets	1	1
Fair Value, Measurements, Recurring [Member] | Forward Starting Interest Rate Swap [Member]
Liabilities:
Accounts payable and other liabilities		29
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Liabilities:
Accounts payable and other liabilities	13	1
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Securities owned	1	2
Total assets at fair value	2,049	1,286
Liabilities:
Total liabilities at fair value		1
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Money Market Mutual Funds [Member]
Assets:
Cash equivalents	2,048	1,284
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Other Securities [Member]
Assets:
Securities owned	1	2
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Liabilities:
Accounts payable and other liabilities	13	1
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Securities owned	409	329
Other assets	41	36
Total assets at fair value	2,830	3,485
Liabilities:
Total liabilities at fair value		29
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Government Debt Securities [Member]
Assets:
Investments segregated for regulatory purposes	2,380	3,120
Securities owned	406	326
Other assets	4	4
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Securities [Member]
Assets:
Securities owned	3	3
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Pay Variable Interest Rate Swap [Member]
Assets:
Other assets	37	32
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Forward Starting Interest Rate Swap [Member]
Liabilities:
Accounts payable and other liabilities		29
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Securities owned	2	1
Other assets	1	1
Total assets at fair value	3	2
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Money Market and Other Mutual Funds [Member]
Assets:
Securities owned	2	1
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Auction Rate Securities [Member]
Assets:
Other assets	$ 1	$ 1

Fair Value Disclosures - Additi

Fair Value Disclosures - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Maximum range of cash and cash equivalents original maturity	3 months
Reverse repurchase agreements generally have a maturity	7 days
Debt Instrument [Line Items]
Long-term debt	$ 1,810	$ 1,101
Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate estimated fair value of the Senior Notes	1,819	1,081
Long-term debt	$ 1,785	$ 1,032

Offsetting Assets and Liabili51

Offsetting Assets and Liabilities - Effect of Rights of Setoff Associated with Company's Recognized Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Offsetting Assets And Liabilities [Line Items]
Deposits paid for securities borrowed, net balance sheet presentation	$ 800	$ 1,000
Total recognized assets, gross	2,119	2,220
Total recognized assets, offset in the balance sheet	0	0
Total recognized assets, net balance sheet presentation	2,119	2,220
Total rocognized assets, gross amount of financial instruments not offset in the balance sheet	(54)	(69)
Total recognized assets, gross amounts of collateral received (including cash) not offset in the balance sheet	(2,049)	(2,125)
Total recognized assets, net of collateral	16	26
Deposits received for securities loaned, gross	2,363
Deposits received for securities loaned, net balance sheet presentation	2,400	2,400
Total recognized liabilities, gross		2,413
Total recognized liabilities, offset in the balance sheet		0
Total recognized liabilities, net balance sheet presentation		2,413
Total recognized liabilities, gross amount of financial instruments not offset in the balance sheet		(69)
Total recognized liabilities, gross amounts of collateral pledged (including cash) not offset in the balance sheet		(2,044)
Total recognized liabilities, net of collateral		300
Investments segregated for regulatory purposes [Member]
Offsetting Assets And Liabilities [Line Items]
Reverse repurchase agreements, gross	1,236	1,193
Reverse repurchase agreements, offset in balance sheet	0	0
Reverse repurchase agreements, net balance sheet presentation	1,236	1,193
Reverse repurchase agreements, gross amount of financial instruments not offset in the balance sheet	0	0
Reverse repurchase agreements, gross amounts of collateral received (including cash) not offset in the balance sheet	(1,236)	(1,193)
Reverse repurchase agreements, net of collateral	0	0
Receivable from brokers, dealers and clearing organizations [Member]
Offsetting Assets And Liabilities [Line Items]
Deposits paid for securities borrowed, gross	846	995
Deposits paid for securities borrowed, offset in balance sheet	0	0
Deposits paid for securities borrowed, net balance sheet presentation	846	995
Deposits paid for securities borrowed, gross amount of financial instruments not offset in the balance sheet	(54)	(69)
Deposits paid for securities borrowed, gross amounts of collateral received (including cash) not offset in the balance sheet	(776)	(900)
Deposits paid for securities borrowed, net of collateral	16	26
Other assets [Member]
Offsetting Assets And Liabilities [Line Items]
Pay-variable interest rate swaps, gross	37	32
Pay-variable interest rate swaps, offset in balance sheet	0	0
Pay-variable interest rate swaps, net balance sheet presentation	37	32
Pay-variable interest rate swaps, gross amount of financial instruments not offset in the balance sheet	0	0
Pay-variable interest rate swaps, gross amounts of collateral (including cash) not offset in the balance sheet	(37)	(32)
Pay-variable interest rate swaps, net of collateral	0	0
Payable to brokers, dealers and clearing organizations [Member]
Offsetting Assets And Liabilities [Line Items]
Deposits received for securities loaned, gross	2,363	2,384
Deposits received for securities loaned, offset in the balance sheet	0	0
Deposits received for securities loaned, net balance sheet presentation	2,363	2,384
Deposits received for securities loaned, gross amount of financial instruments not offset in the balance sheet	(54)	(69)
Deposits received for securities loaned, gross amounts of collateral pledged (including cash) not offset in the balance sheet	(2,065)	(2,015)
Deposits received for securities loaned, net of collateral	$ 244	300
Accounts Payable and Accrued Liabilities [Member]
Offsetting Assets And Liabilities [Line Items]
Forward-starting interest rate swaps, gross		29
Forward-starting interest rate swaps, offset in the balance sheet		0
Forward-starting interest rate swaps, net balance sheet presentation		29
Forward-starting interest rate swaps, gross amount of financial instruments not offset in the balance sheet		0
Forward-starting interest rate swaps, gross amounts of collateral pledged (including cash) not offset in the balance sheet		(29)
Forward-starting interest rate swaps, net of collateral		$ 0

Offsetting Assets and Liabili52

Offsetting Assets and Liabilities Offsetting Assets and Liabilities - Disaggregation of Secured Lending Transactions (Details) $ in Millions	Jun. 30, 2015USD ($)
Disaggregation of Gross Securities Lending Transactions [Line Items]
Deposits received for securities loaned, gross	$ 2,363
Equity Securities [Member]
Disaggregation of Gross Securities Lending Transactions [Line Items]
Deposits received for securities loaned, gross	2,132
Exchange Traded Funds [Member]
Disaggregation of Gross Securities Lending Transactions [Line Items]
Deposits received for securities loaned, gross	137
Closed-end Funds [Member]
Disaggregation of Gross Securities Lending Transactions [Line Items]
Deposits received for securities loaned, gross	57
Other Securities [Member]
Disaggregation of Gross Securities Lending Transactions [Line Items]
Deposits received for securities loaned, gross	$ 37

Offsetting Assets and Liabili53

Offsetting Assets and Liabilities - Effect of Rights of Setoff Associated with Company's Recognized Assets and Liabilities Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Offsetting Assets And Liabilities [Line Items]
Fair value of collateral the Company has received under enforceable master agreements	$ 2,128	$ 2,231
Fair value of collateral the Company has pledged under enforceable master agreements	2,117	2,124
Transacted Through The Option Clearing Corporation [Member]
Offsetting Assets And Liabilities [Line Items]
Gross amounts of deposits paid for securities borrowed	499	616
Gross amounts of deposits received for securities loaned	$ 685	$ 754

Accumulated Other Comprehensi54

Accumulated Other Comprehensive Income (Loss) Net Change (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cash Flow Hedging Instruments [Abstract]
Net unrealized loss	$ 0	$ (15)	$ (15)	$ (24)
Net unrealized loss, tax effect	0	6	5	9
Net unrealized loss, net of tax	0	(9)	(10)	(15)
Reclassification adjustment for portion of realized loss amortized to net income	1	0	3	0
Reclassification adjustment for portion of realized loss amortized to net income, tax effect	(1)	0	(1)	0
Reclassification adjustment for portion of realized loss amortized to net income, net of tax	0	0	2	0
Total other comprehensive income (loss), before tax	1	(15)	(12)	(24)
Income tax effect	(1)	6	4	9
Total other comprehensive income (loss), net of tax	$ 0	$ (9)	$ (8)	$ (15)

Accumulated Other Comprehensi55

Accumulated Other Comprehensive Income (Loss) Balance Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) Balance Rollforward [Line Items]
Beginning balance			$ (18)
Total other comprehensive income (loss), net of tax	$ 0	$ (9)	(8)	$ (15)
Ending balance	(26)		(26)
Forward Starting Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) Balance Rollforward [Line Items]
Beginning balance	(26)	(6)	(18)	0
Other comprehensive loss, before reclassification	0	(9)	(10)	(15)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0	0	2	0
Total other comprehensive income (loss), net of tax	0	(9)	(8)	(15)
Ending balance	$ (26)	$ (15)	$ (26)	$ (15)

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Antidilutive shares excluded from the calculation of diluted EPS	0	0	0	0

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)	9 Months Ended
	Jun. 30, 2015USD ($)board_of_directors_member	Sep. 30, 2014USD ($)
Related Party Transaction [Line Items]
Toronto-Dominion Bank percentage of ownership in the Company	41.00%
Toronto-Dominion Bank's right to designate to the Company's board of directors | board_of_directors_member	5
Board of Directors Total Members | board_of_directors_member	12
Adjustments required to adjust variable rate leg of interest rate swaps under current IDA Agreement	1 month
Contingent liability carried on the condensed consolidated balance sheets for the Insured Deposit Account Agreement	$ 0	$ 0
Insured Deposit Account Agreement Fee Example [Member]
Related Party Transaction [Line Items]
Amount of deposits, in the insured deposit account agreement fee example	$ 100,000,000
Term of deposits invested in fixed rate investments, in the insured deposit account agreement fee example	5 years
Term of fixed rate investments that deposits are invested in, in the insured deposit account agreement fee example	5 years
Fixed yield for applicable LIBOR-based swaps, in the insured deposit account agreement fee example	1.45%
Gross fixed yield earned on deposits, in the insured deposit account agreement fee example	1.45%
Current IDA Agreement [Member]
Related Party Transaction [Line Items]
Agreement effective date	Jan. 1, 2013
Agreement expiration date	Jul. 1, 2018
Agreement successive renewal terms	5 years
Prior written notice period for termination of agreement by any party	2 years
Number Of Primary Components Of Fee Earned On Ida Agreement	2
Percentage of fixed rate notional investments	77.00%
Percentage of floating rate investments	23.00%
Deposit amount threshold for floating-rate or fixed-rate notional investments with a maturity of up to 24 months subject to servicing fee adjustment	$ 20,000,000,000
Current IDA Agreement [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Servicing fee percentage (in basis points)	0.03%
Current IDA Agreement [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Servicing fee percentage (in basis points)	0.25%
Short-term fixed-rate notional investments maturity	24 months
Current IDA Agreement [Member] | New Fixed Rate Notional Investments [Member]
Related Party Transaction [Line Items]
Event 1 Federal Funds effective rate minimum	0.75%
Term of U.S. dollar interest rate swaps	5 years
Event 2 Minimum Rate on five-year U.S. dollar interest rate swaps for 20 consecutive business days	1.50%
Event 2 number of consecutive business days required above the minimum rate on U.S. dollar interest rate swaps for reduction in rate earned by Company in the case of Event 1 and Event 2	20 days
The percentage used in the calculation to reduce the rate earned by the Company on new fixed-rate notional investments in the case of event 1 and event 2	20.00%
Maximum reduction to rate earned by Company in the case of event 1 and event 2	0.10%

Related Party Transactions - Su

Related Party Transactions - Summary of Revenues Resulting from Transactions with Related Parties (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Related Party Transaction [Line Items]
Revenues from TD and Affiliates	$ 214	$ 207	$ 634	$ 626
Insured Deposit Account Fees [Member] | Insured Deposit Account Agreement [Member]
Related Party Transaction [Line Items]
Revenues from TD and Affiliates	209	202	620	612
Various [Member] | Referral and Strategic Alliance Agreement [Member]
Related Party Transaction [Line Items]
Revenues from TD and Affiliates	3	3	9	9
Various [Member] | Other [Member]
Related Party Transaction [Line Items]
Revenues from TD and Affiliates	$ 2	$ 2	$ 5	$ 5

Related Party Transactions - 59

Related Party Transactions - Summary of Expenses Resulting from Transactions with Related Parties (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Related Party Transaction [Line Items]
Expenses to TD and Affiliates	$ 5	$ 4	$ 16	$ 15
Professional Services [Member] | Canadian Call Center Services Agreement [Member]
Related Party Transaction [Line Items]
Expenses to TD and Affiliates	5	4	14	13
Various [Member] | Other [Member]
Related Party Transaction [Line Items]
Expenses to TD and Affiliates	$ 0	$ 0	$ 2	$ 2

Related Party Transactions - 60

Related Party Transactions - Summary of Classification and Amount of Receivables from and Payables to Affiliates of Company (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Assets:
Receivable from brokers, dealers and clearing organizations	$ 1,144	$ 1,108
Receivable from affiliates	107	99
Liabilities:
Payable to brokers, dealers and clearing organizations	2,414	2,421
Payable to affiliates	6	5
Related Party Assets [Member]
Assets:
Receivable from brokers, dealers and clearing organizations	0	1
Receivable from affiliates	107	99
Related Party Liabilities [Member]
Liabilities:
Payable to brokers, dealers and clearing organizations	67	96
Payable to affiliates	$ 6	$ 5

Condensed Consolidating Finan61

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Balance Sheet (Unaudited) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013
ASSETS
Cash and cash equivalents	$ 2,233	$ 1,460	$ 1,260	$ 1,062
Cash and investments segregated and on deposit for regulatory purposes	4,425	5,116
Receivable from brokers, dealers and clearing organizations	1,144	1,108
Receivable from clients, net	12,868	11,639
Investments in subsidiaries	0	0
Receivable from affiliates	107	99
Goodwill	2,467	2,467
Acquired intangible assets, net	684	751
Other, net	1,231	1,191
Total assets	25,159	23,831
Liabilities:
Payable to brokers, dealers and clearing organizations	2,414	2,421
Payable to clients	15,070	14,497
Accounts payable and other liabilities	568	595
Payable to affiliates	6	5
Notes payable	0	150
Long-term debt	1,810	1,101
Deferred income taxes	298	314
Total liabilities	20,166	19,083
Stockholders’ equity	4,993	4,748
Total liabilities and stockholders’ equity	25,159	23,831
Eliminations [Member]
ASSETS
Cash and cash equivalents	0	0
Cash and investments segregated and on deposit for regulatory purposes	0	0
Receivable from brokers, dealers and clearing organizations	0	0
Receivable from clients, net	0	0
Investments in subsidiaries	(11,502)	(11,622)
Receivable from affiliates	(6)	(11)
Goodwill	0	0
Acquired intangible assets, net	0	0
Other, net	(57)	(54)
Total assets	(11,565)	(11,687)
Liabilities:
Payable to brokers, dealers and clearing organizations	0	0
Payable to clients	0	0
Accounts payable and other liabilities	(13)	(13)
Payable to affiliates	(6)	(11)
Notes payable		0
Long-term debt	0	0
Deferred income taxes	(44)	(41)
Total liabilities	(63)	(65)
Stockholders’ equity	(11,502)	(11,622)
Total liabilities and stockholders’ equity	(11,565)	(11,687)
Parent [Member]
ASSETS
Cash and cash equivalents	956	117	173	199
Cash and investments segregated and on deposit for regulatory purposes	0	0
Receivable from brokers, dealers and clearing organizations	0	0
Receivable from clients, net	0	0
Investments in subsidiaries	5,808	5,868
Receivable from affiliates	6	11
Goodwill	0	0
Acquired intangible assets, net	0	0
Other, net	116	156
Total assets	6,886	6,152
Liabilities:
Payable to brokers, dealers and clearing organizations	0	0
Payable to clients	0	0
Accounts payable and other liabilities	83	153
Payable to affiliates	0	0
Notes payable		150
Long-term debt	1,810	1,101
Deferred income taxes	0	0
Total liabilities	1,893	1,404
Stockholders’ equity	4,993	4,748
Total liabilities and stockholders’ equity	6,886	6,152
Guarantor Subsidiary [Member]
ASSETS
Cash and cash equivalents	2	2	3	7
Cash and investments segregated and on deposit for regulatory purposes	0	0
Receivable from brokers, dealers and clearing organizations	0	0
Receivable from clients, net	0	0
Investments in subsidiaries	5,694	5,754
Receivable from affiliates	3	2
Goodwill	0	0
Acquired intangible assets, net	146	146
Other, net	15	16
Total assets	5,860	5,920
Liabilities:
Payable to brokers, dealers and clearing organizations	0	0
Payable to clients	0	0
Accounts payable and other liabilities	0	0
Payable to affiliates	0	0
Notes payable		0
Long-term debt	0	0
Deferred income taxes	52	52
Total liabilities	52	52
Stockholders’ equity	5,808	5,868
Total liabilities and stockholders’ equity	5,860	5,920
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	1,275	1,341	$ 1,084	$ 856
Cash and investments segregated and on deposit for regulatory purposes	4,425	5,116
Receivable from brokers, dealers and clearing organizations	1,144	1,108
Receivable from clients, net	12,868	11,639
Investments in subsidiaries	0	0
Receivable from affiliates	104	97
Goodwill	2,467	2,467
Acquired intangible assets, net	538	605
Other, net	1,157	1,073
Total assets	23,978	23,446
Liabilities:
Payable to brokers, dealers and clearing organizations	2,414	2,421
Payable to clients	15,070	14,497
Accounts payable and other liabilities	498	455
Payable to affiliates	12	16
Notes payable		0
Long-term debt	0	0
Deferred income taxes	290	303
Total liabilities	18,284	17,692
Stockholders’ equity	5,694	5,754
Total liabilities and stockholders’ equity	$ 23,978	$ 23,446

Condensed Consolidating Finan62

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Income (Unaudited) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Income Statements, Captions [Line Items]
Net revenues	$ 794	$ 763	$ 2,415	$ 2,327
Operating expenses	469	447	1,450	1,381
Operating income	325	316	965	946
Other expense (income)	6	6	24	18
Income (loss) before income taxes and equity in income of subsidiaries	319	310	941	928
Provision for (benefit from) income taxes	122	120	344	352
Income (loss) before equity in income of subsidiaries	197	190	597	576
Equity in income of subsidiaries	0	0	0	0
Net income	197	190	597	576
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Net revenues	(5)	(5)	(13)	(11)
Operating expenses	(5)	(5)	(13)	(11)
Operating income	0	0	0	0
Other expense (income)	0	0	0	0
Income (loss) before income taxes and equity in income of subsidiaries	0	0	0	0
Provision for (benefit from) income taxes	0	0	0	0
Income (loss) before equity in income of subsidiaries	0	0	0	0
Equity in income of subsidiaries	(408)	(388)	(1,230)	(1,170)
Net income	(408)	(388)	(1,230)	(1,170)
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Net revenues	5	4	13	10
Operating expenses	4	4	11	9
Operating income	1	0	2	1
Other expense (income)	13	6	31	18
Income (loss) before income taxes and equity in income of subsidiaries	(12)	(6)	(29)	(17)
Provision for (benefit from) income taxes	(5)	(2)	(11)	(13)
Income (loss) before equity in income of subsidiaries	(7)	(4)	(18)	(4)
Equity in income of subsidiaries	204	194	615	580
Net income	197	190	597	576
Guarantor Subsidiary [Member]
Condensed Income Statements, Captions [Line Items]
Net revenues	0	0	0	0
Operating expenses	0	0	0	0
Operating income	0	0	0	0
Other expense (income)	0	0	0	0
Income (loss) before income taxes and equity in income of subsidiaries	0	0	0	0
Provision for (benefit from) income taxes	0	0	0	1
Income (loss) before equity in income of subsidiaries	0	0	0	(1)
Equity in income of subsidiaries	204	194	615	573
Net income	204	194	615	572
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net revenues	794	764	2,415	2,328
Operating expenses	470	448	1,452	1,383
Operating income	324	316	963	945
Other expense (income)	(7)	0	(7)	0
Income (loss) before income taxes and equity in income of subsidiaries	331	316	970	945
Provision for (benefit from) income taxes	127	122	355	364
Income (loss) before equity in income of subsidiaries	204	194	615	581
Equity in income of subsidiaries	0	0	0	17
Net income	$ 204	$ 194	$ 615	$ 598

Condensed Consolidating Finan63

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Cash Flows (Unaudited) (Detail) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash provided by (used in) operating activities	$ 643	$ 652
Cash flows from investing activities:
Purchase of property and equipment	(58)	(54)
Proceeds from sale and maturity of short-term investments	501	1
Payments to Acquire Short-term Investments	(503)	(1)
Proceeds from sale of investments	10	13
Other	3
Net cash provided by (used in) investing activities	(47)	(40)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	1,248	0
Payment of debt issuance costs	(11)	0
Principal payments on long-term debt	(544)	0
Proceeds from notes payable	0	230
Principal payments on notes payable	(150)	(80)
Payment of cash dividends	(244)	(474)
Purchase of treasury stock	(148)	(106)
Other, net	26	16
Net cash provided by (used in) financing activities	177	(414)
Intercompany investing and financing activities, net	0	0
Net increase (decrease) in cash and cash equivalents	773	198
Cash and cash equivalents at beginning of period	1,460	1,062
Cash and cash equivalents at end of period	2,233	1,260
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash provided by (used in) operating activities	(12)	(80)
Cash flows from investing activities:
Purchase of property and equipment	0	0
Proceeds from sale and maturity of short-term investments	500	0
Payments to Acquire Short-term Investments	(502)
Proceeds from sale of investments	1	13
Other	0
Net cash provided by (used in) investing activities	(1)	13
Cash flows from financing activities:
Proceeds from issuance of long-term debt	1,248
Payment of debt issuance costs	(11)
Principal payments on long-term debt	(544)
Proceeds from notes payable		230
Principal payments on notes payable	(150)	(80)
Payment of cash dividends	(244)	(474)
Purchase of treasury stock	(148)	(106)
Other, net	26	16
Net cash provided by (used in) financing activities	177	(414)
Intercompany investing and financing activities, net	675	455
Net increase (decrease) in cash and cash equivalents	839	(26)
Cash and cash equivalents at beginning of period	117	199
Cash and cash equivalents at end of period	956	173
Guarantor Subsidiary [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash provided by (used in) operating activities	0	1
Cash flows from investing activities:
Purchase of property and equipment	0	0
Proceeds from sale and maturity of short-term investments	0	0
Payments to Acquire Short-term Investments	0
Proceeds from sale of investments	0	0
Other	0
Net cash provided by (used in) investing activities	0	0
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0
Payment of debt issuance costs	0
Principal payments on long-term debt	0
Proceeds from notes payable		0
Principal payments on notes payable	0	0
Payment of cash dividends	0	0
Purchase of treasury stock	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	0	0
Intercompany investing and financing activities, net	0	(5)
Net increase (decrease) in cash and cash equivalents	0	(4)
Cash and cash equivalents at beginning of period	2	7
Cash and cash equivalents at end of period	2	3
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash provided by (used in) operating activities	655	731
Cash flows from investing activities:
Purchase of property and equipment	(58)	(54)
Proceeds from sale and maturity of short-term investments	1	1
Payments to Acquire Short-term Investments	(1)
Proceeds from sale of investments	9	0
Other	3
Net cash provided by (used in) investing activities	(46)	(53)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0
Payment of debt issuance costs	0
Principal payments on long-term debt	0
Proceeds from notes payable		0
Principal payments on notes payable	0	0
Payment of cash dividends	0	0
Purchase of treasury stock	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	0	0
Intercompany investing and financing activities, net	(675)	(450)
Net increase (decrease) in cash and cash equivalents	(66)	228
Cash and cash equivalents at beginning of period	1,341	856
Cash and cash equivalents at end of period	$ 1,275	$ 1,084