Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income including noncontrolling interest	$ 126.4	$ 170.5	$ 221.1
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities:
Depreciation and amortization	82.3	65.5	57.3
Provision for bad debt	15.4	7.5	3.8
Gain on sale of held for sale assets and liabilities	(3.8)	0.0	(18.1)
Share-based payment award compensation costs	19.2	17.0	15.8
Deferred income tax provision (benefit)	(36.0)	5.3	10.8
Extinguishment of liabilities, net	(7.0)	(8.2)	(5.3)
Foreign currency (gains), net	(11.8)	(7.3)	(7.8)
Other	3.3	3.2	(5.3)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable, net	(506.8)	485.0	460.7
Inventories	(49.5)	81.4	232.3
Prepaid expenses	7.7	10.8	46.5
Short-term derivative assets, net	163.7	81.5	(265.8)
Other current assets	(20.4)	34.0	(38.0)
Cash collateral with financial counterparties	149.2	133.3	(288.0)
Other non-current assets	4.4	(1.9)	13.7
Accounts payable	423.4	(481.5)	(587.8)
Customer deposits	(26.3)	(17.5)	12.8
Accrued expenses and other current liabilities	(121.9)	(141.9)	267.0
Non-current income tax, net and other long-term liabilities	(6.4)	11.0	15.4
Total adjustments	78.8	276.9	(80.0)
Net cash provided by operating activities	205.2	447.5	141.1
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired and other investments	(430.8)	(96.9)	(273.6)
Proceeds from sale of business	29.0	0.0	0.0
Capital expenditures	(36.1)	(51.0)	(50.2)
Proceeds from the sale of fixed assets	7.3	5.3	0.0
Escrow payment related to an assumed obligation of an acquired business	0.0	0.0	(21.7)
Proceeds from the sale of crude oil joint venture interests	0.0	0.0	43.0
Purchase of (COLI) investments	(1.0)	(1.0)	(2.1)
Issuance of Note Receivable	(3.5)	(1.4)	0.0
Repayment of Note Receivable	6.5	0.3	7.5
Net cash used in investing activities	(428.5)	(144.8)	(297.1)
Cash flows from financing activities:
Borrowings of debt	4,688.0	4,831.2	5,757.3
Repayments of debt	(4,280.3)	(4,752.0)	(5,551.5)
Payments of senior revolving credit facility and senior term loan facility loan costs	(5.7)	(3.4)	0.0
Dividends paid on common stock	(16.6)	(15.3)	(10.6)
Investment by noncontrolling interest	0.0	0.5	0.0
Distribution of noncontrolling interest	(0.3)	(0.3)	(11.6)
Purchases of common stock	(41.2)	(70.5)	(10.0)
Federal and state tax benefits resulting from tax deductions in excess of the compensation cost recognized for share-based payment awards	1.6	0.0	1.0
Purchases of common stock tendered by employees to satisfy the required withholding taxes related to share-based payment awards	(4.6)	(7.3)	(5.1)
Net cash provided by (used in) financing activities	340.9	(17.0)	169.5
Effect of exchange rate changes on cash and cash equivalents	(1.5)	(5.5)	(3.4)
Net increase in cash and cash equivalents	116.1	280.2	10.2
Cash and cash equivalents, as of beginning of period	582.5	302.3	292.1
Cash and cash equivalents, as of end of period	698.6	582.5	302.3
Supplemental Disclosures of Cash Flow Information Cash paid during the year for:
Interest, net of capitalized interest	40.7	33.1	29.1
Income taxes	$ 37.5	$ 44.0	$ 40.8