Short-Term Financing	9 Months Ended
Mar. 31, 2012
Short-Term Financing [Abstract]
Short-Term Financing	Note 10. Short-term Financing The Company has a $2.0 billion, 364-day credit agreement with a group of lenders that matures in June 2012. In addition, the Company has a four-year $3.25 billion credit facility maturing in June 2015 that contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The Company also has an existing $1.5 billion three-year credit facility that matures in June 2013 that also contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The interest rate applicable to committed borrowings is tied to LIBOR, the federal funds effective rate or the prime rate depending on the notification provided by the Company to the syndicated financial institutions prior to borrowing. The Company is also required to pay facility fees on the credit agreements. The primary uses of the credit facilities are to provide liquidity to the commercial paper program and funding for general corporate purposes, if necessary. The Company had no borrowings through March 31, 2012 under the credit agreements. The Company's U.S. short-term funding requirements related to client funds are sometimes obtained through a short-term commercial paper program, which provides for the issuance of up to $6.75 billion in aggregate maturity value of commercial paper. The Company's commercial paper program is rated A-1+ by Standard and Poor's and Prime-1 by Moody's. These ratings denote the highest quality commercial paper securities. Maturities of commercial paper can range from overnight to up to 364 days. At March 31, 2012 and June 30, 2011, the Company had no commercial paper outstanding. For the three months ended March 31, 2012 and 2011, the Company's average borrowings were $0.5 billion and $0.6 billion, respectively, at weighted average interest rates of 0.1% and 0.2%, respectively. For the nine months ended March 31, 2012 and 2011, the Company's average borrowings were $2.3 billion and $1.7 billion, respectively, at weighted average interest rates of 0.1% and 0.2%, respectively. The weighted average maturity of the Company's commercial paper during the three and nine months ended March 31, 2012 approximated one and two days, respectively. The Company's U.S. and Canadian short-term funding requirements related to client funds obligations are sometimes obtained on a secured basis through the use of reverse repurchase agreements. These agreements are collateralized principally by government and government agency securities. These agreements generally have terms ranging from overnight to up to five business days. The Company has $2.0 billion available to it on a committed basis under these reverse repurchase agreements. At March 31, 2012 and June 30, 2011, there were no outstanding obligations under reverse repurchase agreements. For the three months ended March 31, 2012 and 2011, the Company had average outstanding balances under reverse repurchase agreements of $139.9 million and $160.3 million, respectively, at weighted average interest rates of 1.0% and 0.8%, respectively. For the nine months ended March 31, 2012 and 2011, the Company had average outstanding balances under reverse repurchase agreements of $303.3 million and $439.0 million, respectively, at weighted average interest rates of 0.6% and 0.5%, respectively.

Note 10. Short-term Financing

The Company has a $2.0 billion, 364-day credit agreement with a group of lenders that matures in June 2012. In addition, the Company has a four-year $3.25 billion credit facility maturing in June 2015 that contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The Company also has an existing $1.5 billion three-year credit facility that matures in June 2013 that also contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The interest rate applicable to committed borrowings is tied to LIBOR, the federal funds effective rate or the prime rate depending on the notification provided by the Company to the syndicated financial institutions prior to borrowing. The Company is also required to pay facility fees on the credit agreements. The primary uses of the credit facilities are to provide liquidity to the commercial paper program and funding for general corporate purposes, if necessary. The Company had no borrowings through March 31, 2012 under the credit agreements.

The Company's U.S. short-term funding requirements related to client funds are sometimes obtained through a short-term commercial paper program, which provides for the issuance of up to $6.75 billion in aggregate maturity value of commercial paper. The Company's commercial paper program is rated A-1+ by Standard and Poor's and Prime-1 by Moody's. These ratings denote the highest quality commercial paper securities. Maturities of commercial paper can range from overnight to up to 364 days. At March 31, 2012 and June 30, 2011, the Company had no commercial paper outstanding. For the three months ended March 31, 2012 and 2011, the Company's average borrowings were $0.5 billion and $0.6 billion, respectively, at weighted average interest rates of 0.1% and 0.2%, respectively. For the nine months ended March 31, 2012 and 2011, the Company's average borrowings were $2.3 billion and $1.7 billion, respectively, at weighted average interest rates of 0.1% and 0.2%, respectively. The weighted average maturity of the Company's commercial paper during the three and nine months ended March 31, 2012 approximated one and two days, respectively.

The Company's U.S. and Canadian short-term funding requirements related to client funds obligations are sometimes obtained on a secured basis through the use of reverse repurchase agreements. These agreements are collateralized principally by government and government agency securities. These agreements generally have terms ranging from overnight to up to five business days. The Company has $2.0 billion available to it on a committed basis under these reverse repurchase agreements. At March 31, 2012 and June 30, 2011, there were no outstanding obligations under reverse repurchase agreements. For the three months ended March 31, 2012 and 2011, the Company had average outstanding balances under reverse repurchase agreements of $139.9 million and $160.3 million, respectively, at weighted average interest rates of 1.0% and 0.8%, respectively. For the nine months ended March 31, 2012 and 2011, the Company had average outstanding balances under reverse repurchase agreements of $303.3 million and $439.0 million, respectively, at weighted average interest rates of 0.6% and 0.5%, respectively.