| In millions, except per share items | Mar-31-15 | Dec-31-14 | Sep-30-14 | Jun-30-14 | Mar-31-14 | Dec-31-13 | Sep-30-13 | Jun-30-13 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Cash flows from operating activities: | | | | | | | | |
| Net income | 99.6 | 113.8 | 259.9 | 163.6 | 77.3 | 87.7 | 211.1 | 127.9 |
| Items not involving cash: | | | | | | | | |
| Stock-based compensation | 8.8 | 9.2 | 24.4 | 15.4 | 6.8 | 5.8 | 19.7 | 13.1 |
| Depreciation of property and equipment | 16.8 | 15.6 | 47.9 | 27.4 | 13.4 | 14.0 | 28.2 | 17.1 |
| Amortization of intangible assets | 52.6 | 51.0 | 162.2 | 110.0 | 55.0 | 55.8 | 147.4 | 100.1 |
| Deferred lease inducements and rent | -6.7 | -0.4 | 5.9 | 0.2 | -0.1 | 4.1 | 24.0 | 15.3 |
| Deferred income taxes | 3.8 | -14.5 | -43.5 | -26.0 | -12.3 | -8.1 | -36.2 | -25.8 |
| Tax benefit on option exercises | -1.9 | 0.7 | -4.2 | -4.0 | -2.7 | 0.7 | -10.5 | -9.5 |
| Deferred financing cost amortization | 2.5 | 2.5 | 7.1 | 4.7 | 2.2 | 2.1 | 7.0 | 4.9 |
| Changes in operating assets and liabilities, net of effects from acquisitions: | | | | | | | | |
| Accounts receivable | -82.2 | 41.9 | -336.6 | -214.0 | -171.9 | -97.8 | -119.6 | -21.3 |
| Rebates receivable | 29.2 | 16.3 | -574.4 | -602.5 | -362.4 | -8.1 | 11.1 | 18.4 |
| Other current assets | 22.1 | -33.2 | -11.4 | -56.4 | 26.3 | -33.4 | 8.0 | 13.4 |
| Accounts payable | 71.9 | -138.0 | 287.9 | 182.9 | 144.3 | 101.8 | 47.6 | -22.6 |
| Accrued expenses and other current liabilities | -59.2 | | | | 20.8 | -43.7 | | |
| Rebates payable | -12.1 | 52.7 | 558.8 | 586.6 | 362.6 | 25.6 | 14.0 | 13.8 |
| Other long-term assets and liabilities | 1.6 | 21.4 | -5.3 | -11.8 | -23.6 | 15.2 | 1.8 | 3.4 |
| Net cash provided by operating activities | 146.7 | 163.1 | 427.1 | 192.9 | 135.7 | 139.6 | 335.9 | 236.3 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Acquisition, net of cash acquired | -261.7 | | -2.0 | -2.0 | -2.0 | -381.8 | -7.1 | -7.1 |
| Purchases of property and equipment | -9.1 | -31.9 | -46.2 | -32.9 | -12.8 | -35.6 | -93.3 | -72.1 |
| Net cash used by investing activities | -270.8 | -11.9 | -48.2 | -34.9 | -14.8 | -417.4 | -80.3 | -59.2 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Proceeds from issuance of debt | | | 492.5 | 492.5 | 492.5 | 350.0 | 100.0 | 100.0 |
| Repayment of long-term debt | -12.5 | -12.5 | -325.0 | -312.5 | -306.3 | -106.3 | -256.3 | -250.0 |
| Payment of financing costs | | | -2.0 | -2.0 | -1.0 | | -2.3 | -2.3 |
| Proceeds from exercise of options | 0.0 | 0.0 | 5.6 | 4.9 | 3.6 | 0.0 | 3.0 | 1.9 |
| Tax benefit on option exercises | 1.9 | -0.7 | 4.2 | 4.0 | 2.7 | -0.7 | 10.5 | 9.5 |
| Distributions to non-controlling interest | -12.1 | -14.5 | -37.8 | -25.8 | -15.0 | -14.2 | -22.1 | -10.1 |
| Other | 0.0 | 0.0 | -0.4 | -0.3 | | | | |
| Net cash (used) provided by financing activities | -22.7 | -46.1 | 140.7 | 164.3 | 176.6 | 228.8 | -190.0 | -174.3 |
| Effect of foreign exchange on cash balances | 0.0 | 0.0 | 0.1 | 0.0 | 0.1 | 0.0 | -0.1 | 0.0 |
| Change in cash and cash equivalents | -146.8 | 105.1 | 519.6 | 322.3 | 297.5 | -49.0 | 65.5 | 2.8 |
| Cash and cash equivalents, beginning of period | 1,012.0 | | 387.2 | 387.2 | 387.2 | | 370.8 | 370.8 |
| Cash and cash equivalents, end of period | 865.2 | 105.1 | 906.8 | 709.5 | 684.7 | -49.0 | 436.2 | 373.6 |