| In millions, except per share items | Dec-31-16 | Sep-30-16 | Jun-30-16 | Mar-31-16 | Dec-31-15 | Sep-30-15 | Jun-30-15 | Mar-31-15 |
| | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Cash flows from operating activities | | | | | | | | |
| Net income | 226.3 | 196.5 | 294.5 | 289.9 | 273.6 | 282.9 | 164.3 | 155.3 |
| Loss from discontinued operations | 0.1 | 0.2 | -0.8 | -0.7 | 0.8 | 2.3 | 8.4 | 10.9 |
| |
| Adjustments to reconcile net income to net cash provided by operating activities | | | | | | | | |
| Provision for doubtful accounts | 22.3 | 20.2 | 19.1 | 16.9 | 17.2 | 17.2 | 16.4 | 15.3 |
| Depreciation and amortization | 88.6 | 84.0 | 77.7 | 73.3 | 66.2 | 62.5 | 59.4 | 56.3 |
| Amortization of deferred issuance costs | 1.3 | 1.2 | 1.2 | 1.2 | 1.4 | 1.7 | 2.1 | 2.5 |
| Realized gain on sale of investments | -33.0 | -29.2 | -12.4 | -6.3 | -4.0 | -10.7 | -13.5 | -13.8 |
| Loss (gain) on disposal of assets | 1.8 | 2.8 | 2.8 | 2.6 | 1.9 | 0.2 | 0.0 | 0.0 |
| Equity in net income of nonconsolidated affiliates | -54.4 | -49.3 | -49.1 | -49.6 | -49.9 | -47.5 | -42.6 | -38.9 |
| Distributions from nonconsolidated affiliates | 65.0 | 71.4 | 63.5 | 60.8 | 56.3 | 44.9 | 51.3 | 49.4 |
| Deferred income tax | 27.6 | 23.9 | -88.0 | -88.3 | -86.2 | -94.3 | 12.9 | 10.9 |
| Stock compensation | 13.1 | 12.0 | 10.9 | 9.5 | 8.5 | 7.4 | 6.3 | 5.1 |
| Change in fair value of interest rate swaps | -9.8 | 1.4 | 0.1 | 0.1 | 0.3 | 0.5 | 0.3 | 0.5 |
| Loss on extinguishment of debt | | | | | | | | 0.5 |
| |
| (Increase) decrease in assets, net of business combinations | | | | | | | | |
| Accounts receivable | -39.6 | -29.6 | -25.9 | -27.5 | -31.1 | -27.8 | -23.6 | -21.4 |
| Other assets | -35.2 | -14.9 | -25.2 | 34.0 | 18.6 | 11.0 | -15.6 | -87.0 |
| |
| (Decrease) increase in liabilities, net of business combinations | | | | | | | | |
| Accounts payable | 8.3 | -2.2 | -9.6 | -10.3 | -10.7 | -1.8 | 3.3 | 5.3 |
| Accrued payroll | 4.6 | -11.0 | 2.8 | 3.7 | 6.5 | 7.8 | 5.5 | 2.9 |
| Accrued interest | 0.0 | -8.0 | -0.3 | 6.9 | 3.9 | 8.2 | 4.5 | 0.8 |
| Other liabilities | 15.6 | 14.8 | 24.6 | -40.4 | -19.5 | -23.6 | -4.5 | 57.7 |
| Other | 0.4 | 0.7 | 0.0 | 0.4 | -0.3 | -1.1 | -1.2 | -1.5 |
| Net cash used in operating activities of discontinued operations | -0.5 | -2.0 | -1.2 | -2.4 | -3.2 | -3.5 | -5.3 | -6.3 |
| Net cash provided by operating activities | 305.7 | 286.1 | 285.3 | 286.0 | 263.2 | 248.6 | 240.7 | 204.8 |
| |
| Cash flows from investing activities | | | | | | | | |
| Capital expenditures | -71.2 | -73.3 | -67.0 | -64.2 | -44.8 | -42.1 | -38.2 | -36.8 |
| Proceeds from sale of business | 7.8 | 0.4 | | 7.0 | 27.4 | 27.4 | 21.6 | 21.9 |
| Proceeds from disposal of assets | 18.6 | 20.2 | 20.2 | 20.0 | 2.3 | 1.4 | 1.4 | 1.3 |
| Proceeds from sale of equity interests of nonconsolidated affiliates | 7.8 | 0.4 | | 7.0 | 27.4 | 27.4 | 21.6 | 21.9 |
| Decrease in cash related to conversion of consolidated affiliates to equity interests | | | | -0.1 | | 0.0 | | |
| Increase in cash related to conversion of equity method affiliates to consolidated affiliates | | 0.1 | | 0.0 | | | | |
| Net change in restricted cash | 4.4 | 2.2 | 7.2 | 4.7 | -1.5 | -1.7 | -4.5 | 2.9 |
| Net settlements on interest rate swap | -1.7 | -1.4 | -1.4 | -1.4 | -1.4 | -1.4 | -1.5 | -1.5 |
| Business acquisitions, net of cash acquired 2016 - $5,107; 2015 - $2,711; 2014 - $2,527 | -172.2 | -172.4 | -130.1 | -150.7 | -112.8 | -105.3 | -141.9 | -133.7 |
| Purchase of equity interests in nonconsolidated affiliates | -49.3 | -9.5 | -8.6 | -34.3 | | -54.0 | -62.3 | -34.0 |
| Purchase of management services agreements | -10.6 | | | | -2.1 | | | |
| Other | -2.7 | -8.5 | -5.0 | -4.2 | -1.2 | | -3.1 | -2.4 |
| Net cash provided by investing activities of discontinued operations | | | | | | | 11.0 | |
| Net cash used in investing activities | -274.6 | -235.4 | -177.6 | -200.4 | -156.5 | -165.4 | -215.5 | -191.7 |
| |
| Cash flows from financing activities | | | | | | | | |
| Borrowings under line of credit arrangements and long-term debt, net of issuance costs | 820.6 | 185.3 | 106.9 | 61.3 | 728.3 | 727.9 | 724.8 | 727.0 |
| Payment of debt acquisition costs | | | | | | | -3.2 | -2.8 |
| Principal payments on line of credit arrangements and long-term debt | -633.4 | -123.1 | -96.7 | -34.1 | -614.5 | -628.3 | -627.4 | -627.3 |
| Principal payments under capital lease obligations | -14.5 | -13.1 | -10.1 | -9.0 | -9.0 | -8.0 | -9.1 | -9.3 |
| Distributions to noncontrolling interests of consolidated affiliates | -161.6 | -161.2 | -153.5 | -156.1 | -150.5 | -144.4 | -137.6 | -123.5 |
| Contributions from noncontrolling interests of consolidated affiliates | 6.8 | | 4.0 | 4.2 | 6.3 | 10.3 | | 22.7 |
| Proceeds from sale of equity interests of consolidated affiliates | 11.6 | 10.9 | 7.4 | 4.8 | 5.9 | 4.9 | 4.4 | 0.3 |
| Repurchase of equity interests of consolidated affiliates | -15.6 | -13.3 | -11.5 | -10.1 | -6.1 | -14.0 | -10.3 | -9.1 |
| Proceeds from teammate equity plans | 18.4 | 17.0 | 13.9 | 13.5 | 12.1 | 13.6 | 12.8 | 10.4 |
| Tax payments on options and awards | -10.9 | -5.4 | -8.1 | -7.7 | -5.4 | 0.0 | -2.8 | -1.2 |
| Other | 0.0 | -4.9 | | | 0.0 | -6.6 | | |
| Net cash provided by (used in) financing activities | 21.5 | -103.8 | -147.8 | -133.6 | -36.2 | -42.5 | -36.3 | -9.4 |
| Change in cash and cash equivalents | 52.5 | -53.1 | -40.0 | -48.0 | 70.5 | 40.7 | -11.2 | 3.7 |
| Cash and cash equivalents at beginning of period | | 237.6 | 158.5 | 79.3 | | 8.8 | 8.8 | 8.7 |
| Cash and cash equivalents at end of period | 177.8 | 72.2 | 85.3 | 31.3 | 79.3 | 49.5 | -2.5 | 12.3 |
| |
| Supplemental cash flow information | | | | | | | | |
| |
| Supplemental schedule of noncash investing and financing activities | | | | | | | | |
| Property and equipment acquired through capital leases and installment purchases | 32.9 | 32.6 | 29.2 | 24.6 | 18.6 | 12.5 | 11.2 | 14.1 |
| Net investment in consolidated affiliates that became equity method facilities | | | 0.8 | | | 1.0 | | |
| Accrued capital expenditures at end of period | 2.5 | 3.0 | 3.8 | 5.0 | 4.0 | 4.9 | 6.0 | 3.3 |