v2.4.0.6

Debt (Details) | 12 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  | 1 Months Ended |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended |  |  |  |  |  |  | 12 Months Ended |  |  |  |  | 3 Months Ended |  |
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Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2009 USD ($) | Dec. 31, 2010 Private Equity Partnership Structures I, LLC (PEPS I) USD ($) | Dec. 31, 2010 Hewitt Associates, Inc (Hewitt) USD ($) | Oct. 02, 2010 Hewitt Associates, Inc (Hewitt) USD ($) | Jul. 31, 2009 2005 Facility USD ($) | Oct. 31, 2010 Euro Facility | Dec. 31, 2011 Euro Facility USD ($) | Oct. 15, 2010 Euro Facility EUR (€) | Dec. 31, 2009 U.S. committed bank credit facility USD ($) Y | Dec. 31, 2009 Commercial paper and other short-term borrowings facility USD ($) Y | Jun. 30, 2011 2011 Term loan credit facility | Dec. 31, 2011 2011 Term loan credit facility USD ($) | Jun. 15, 2011 2011 Term loan credit facility USD ($) | Dec. 31, 2011 3.125% Senior notes due 2016 USD ($) | May 24, 2011 3.125% Senior notes due 2016 USD ($) | Dec. 31, 2011 4.76% CAD 375 senior unsecured debt securities due March 2018 USD ($) | Mar. 08, 2011 4.76% CAD 375 senior unsecured debt securities due March 2018 CAD | Aug. 31, 2010 2010 Term loan credit facility Y | Dec. 31, 2011 2010 Term loan credit facility USD ($) | Dec. 31, 2010 2010 Term loan credit facility USD ($) | Aug. 13, 2010 2010 Term loan credit facility USD ($) | Oct. 30, 2010 2010 Term loan credit facility Hewitt Associates, Inc (Hewitt) USD ($) | Dec. 31, 2011 8.205% Junior subordinated deferrable interest debentures due January 2027 USD ($) | Dec. 31, 2010 8.205% Junior subordinated deferrable interest debentures due January 2027 USD ($) | Dec. 31, 2011 6.25% EUR 500 debt securities due July 2014 USD ($) | Dec. 31, 2010 6.25% EUR 500 debt securities due July 2014 USD ($) | Jul. 02, 2009 6.25% EUR 500 debt securities due July 2014 USD ($) | Jul. 02, 2009 6.25% EUR 500 debt securities due July 2014 EUR (€) | Dec. 31, 2011 5.00% Senior notes due September 2020 USD ($) | Dec. 31, 2010 5.00% Senior notes due September 2020 USD ($) | Sep. 07, 2010 5.00% Senior notes due September 2020 USD ($) | Dec. 31, 2011 3.50% senior notes due September 2015 USD ($) | Dec. 31, 2010 3.50% senior notes due September 2015 USD ($) | Sep. 07, 2010 3.50% senior notes due September 2015 USD ($) | Apr. 30, 2011 5.05% CAD 375 debt securities due April 2011 CAD | Dec. 31, 2010 5.05% CAD 375 debt securities due April 2011 USD ($) | Dec. 31, 2010 5.05% CAD 375 debt securities due April 2011 CAD | Dec. 31, 2011 6.25% Senior notes due September 2040 USD ($) | Dec. 31, 2010 6.25% Senior notes due September 2040 USD ($) | Sep. 07, 2010 6.25% Senior notes due September 2040 USD ($) | Dec. 31, 2011 7.375% Debt securities due December 2012 USD ($) | Dec. 31, 2010 7.375% Debt securities due December 2012 USD ($) | Dec. 31, 2011 Notes USD ($) | Sep. 07, 2010 Notes USD ($) | Dec. 31, 2011 Other USD ($) | Dec. 31, 2010 Other USD ($) | Oct. 02, 2010 Senior Notes Hewitt Associates, Inc (Hewitt) USD ($) | Sep. 30, 2010 Bridge Loan Facility USD ($) | Aug. 13, 2010 Bridge Loan Facility USD ($) | Dec. 31, 2011 Commercial paper USD ($)
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt face value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 450,000,000 |  | $ 500,000,000 |  | 375,000,000 |  |  |  |  |  |  |  |  |  | $ 653,000,000 | € 500,000,000 |  |  | $ 600,000,000 |  |  | $ 600,000,000 |  |  | 375,000,000 |  |  | $ 300,000,000 |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.125% | 3.125% | 4.76% | 4.76% |  |  |  |  |  | 8.205% |  | 6.25% |  | 6.25% | 6.25% | 5.00% |  | 5.00% | 3.50% | 3.50% | 3.50% |  | 5.05% | 5.05% | 6.25% |  | 6.25% | 7.375% |  |  |  |  |  |  |  |  |
Total debt | 4,492,000,000 | 4,506,000,000 |  |  |  |  |  |  |  |  |  |  |  | 428,000,000 |  | 500,000,000 |  | 368,000,000 |  |  |  | 975,000,000 |  |  | 687,000,000 | 687,000,000 | 653,000,000 | 667,000,000 |  |  | 598,000,000 | 598,000,000 |  | 597,000,000 | 597,000,000 |  |  | 372,000,000 |  | 297,000,000 | 297,000,000 |  | 225,000,000 | 225,000,000 |  |  | 139,000,000 | 88,000,000 |  |  |  | 50,000,000
Less short-term and current portion of long-term debt | 337,000,000 | 492,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total long-term debt | 4,155,000,000 | 4,014,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New credit and loan facility |  |  |  |  |  |  |  |  | 849,000,000 | 650,000,000 |  | 400,000,000 |  |  |  |  |  |  |  |  |  |  | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000,000 |
Deferred financing cost amortization for Term Loan Credit Facility and Notes |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  | 26,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000,000 |  |  |  |  |  |
Deferred financing costs expense |  |  |  |  | 14,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,000,000 |  |
(Loss) gain on extinguishment of debt | 19,000,000 | 8,000,000 | (5,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt assumed on acquisition |  |  |  |  |  | 346,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 299,000,000 |  |  |
Carrying value of debt related to hedging activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount borrowed under five-year multi-currency foreign credit facility (""Euro credit facility"") |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fees (in basis points) |  |  |  |  |  |  |  | 87.50% |  |  |  | 0.35% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt repayment |  |  |  |  |  |  | 677,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 375,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of credit facility (in years) |  |  |  |  |  |  |  |  |  |  | 5 | 3 |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of credit facility |  |  |  |  |  |  |  |  |  |  | 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annualized interest rate including LIBOR (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.67% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument base interest rate |  |  |  |  |  |  |  |  |  |  |  |  | LIBOR | LIBOR |  |  |  |  |  | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.80% | 1.38% |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of debt held by PEPS I |  |  |  | 47,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred financing cost amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |

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- Definition The amount of acquisition cost of a business combination allocated to the noncurrent portion of the long-term debt assumed from the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph g -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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