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Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income | $ 288.9 | $ 464.6 | $ 551.5
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization of fixed assets and intangible assets | 157.4 | 147.7 | 150.9
Provision for uncollectible receivables | 12.6 | 16.3 | 10.4
Amortization of restricted stock and other non-cash compensation | 43.1 | 44.5 | 51.7
Net amortization of bond discounts (premiums) and deferred financing costs | 8.6 | 1.8 | (8.7)
Non-cash loss related to early extinguishment of debt | 15.2 | 0 | 0
Deferred income tax provision | 69.4 | 103.6 | 83.9
Gain on sale of an investment | 0 | (93.6) | (132.2)
Other | 3.2 | 12.3 | 28.2
Changes in assets and liabilities, net of acquisitions and dispositions, providing cash |  |  |
Accounts receivable | (157.1) | (44.7) | (219.2)
Expenditures billable to clients | (241.5) | (73.8) | (39.2)
Other current assets | (11.3) | 3.5 | (42.0)
Accounts payable | 417.7 | (120.4) | (62.9)
Accrued liabilities | (17.4) | (57.8) | 3.9
Other non-current assets and liabilities | (4.1) | 46.8 | 102.8
Net cash provided by operating activities | 592.9 | 357.2 | 273.5
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Capital expenditures | (173.0) | (169.2) | (140.3)
Acquisitions, including deferred payments, net of cash acquired | (61.5) | (145.5) | (63.1)
Proceeds from the sale of an investment | 0 | 94.8 | 133.5
Other investing activities | 10.0 | 9.7 | 11.1
Net cash used in investing activities | (224.5) | (210.2) | (58.8)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Purchase of long-term debt | (602.4) | (401.5) | (38.9)
Proceeds from issuance of long-term debt | 0 | 1,044.6 | 0
Repurchase of common stock | (481.8) | (350.5) | (400.8)
Common stock dividends | (126.0) | (103.4) | (111.1)
Exercise of stock options | 47.4 | 10.8 | 12.0
Acquisition-related payments | (27.6) | (37.1) | (71.5)
Net increase in short term bank borrowings | 5.4 | 12.6 | 42.5
Distributions to noncontrolling interests | (14.9) | (17.0) | (23.0)
Preferred stock dividends | (11.6) | (11.6) | (11.6)
Excess tax benefit on share-based compensation | 0 | 15.0 | 8.4
Other financing activities | (0.8) | (30.6) | 53.0
Net cash (used in) provided by financing activities | (1,212.3) | 131.3 | (541.0)
Effect of foreign exchange rate changes on cash and cash equivalents | (94.1) | (6.2) | (46.7)
Net (decrease) increase in cash and cash equivalents | (938.0) | 272.1 | (373.0)
Cash and cash equivalents at beginning of period | 2,574.8 | 2,302.7 | 2,675.7
Cash and cash equivalents at end of period | $ 1,636.8 | $ 2,574.8 | $ 2,302.7

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- Definition Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 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 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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