Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss) including noncontrolling interest		$ 181.1	$ 129.0	$ (170.3)
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities:
Depreciation and amortization		87.4	81.5	86.0
Provision for bad debt		25.9	25.1	9.3
Share-based payment award compensation costs		23.6	8.3	21.2
Deferred income tax expense (benefit)		3.3	(3.2)	13.9
Goodwill and other impairments		0.0	0.0	91.9
Restructuring charges		12.6	0.0	25.7
Foreign currency (gains) losses, net		10.8	8.7	(0.6)
(Gain) loss on sale of business		(13.9)	0.0	0.0
Other		(1.8)	(3.3)	(1.2)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable, net (reduced by beneficial interests received in exchange for accounts receivables sold of $369.8 and $338.8 for the years ended December 31, 2018 and 2017, respectively)		(164.1)	(445.2)	(705.4)
Inventories		(61.3)	(11.8)	(43.9)
Prepaid expenses		(17.8)	(5.3)	(19.7)
Short-term derivative assets, net		132.0	(151.3)	(0.2)
Other current assets		(52.8)	(53.1)	(13.9)
Cash collateral with financial counterparties		(42.7)	29.2	(26.7)
Other non-current assets		33.6	(61.5)	(30.3)
Accounts payable		143.7	171.3	451.2
Customer deposits		8.1	11.8	13.4
Accrued expenses and other current liabilities		(91.9)	72.5	77.7
Non-current income tax, net and other long-term liabilities		12.8	14.8	88.4
Total adjustments		47.7	(311.5)	36.7
Net cash provided by (used in) operating activities		228.8	(182.5)	(133.6)
Cash flows from investing activities:
Cash receipts of retained beneficial interests in receivable sales		0.0	369.8	338.8
Acquisition of businesses, net of cash acquired		0.0	(21.3)	(120.7)
Proceeds from sale of business		30.8	0.0	0.0
Capital expenditures		(80.9)	(72.3)	(54.0)
Other investing activities, net		(0.4)	9.8	(5.4)
Net cash provided by (used in) investing activities		(50.5)	286.0	158.7
Cash flows from financing activities:
Borrowings		5,001.7	6,188.4	4,472.7
Repayments of debt		(5,080.2)	(6,407.3)	(4,749.7)
Dividends paid on common stock		(21.1)	(16.2)	(16.3)
Repurchases of common stock		(65.4)	(20.0)	(61.9)
Other financing activities, net	[1]	(39.9)	(2.1)	(6.3)
Net cash used in financing activities		(204.9)	(257.1)	(361.6)
Effect of exchange rate changes on cash and cash equivalents		1.0	(7.0)	10.3
Net (decrease) increase in cash and cash equivalents		(25.6)	(160.6)	(326.2)
Cash and cash equivalents, as of the beginning of the period		211.7	372.3	698.6
Cash and cash equivalents, as of the end of the period		186.1	211.7	372.3
Supplemental Disclosures of Cash Flow Information Cash paid during the year for:
Interest, net of capitalized interest		77.0	73.8	64.9
Income taxes		$ 82.9	$ 85.3	$ 50.8

[1] Includes $32.7 million cash paid for the acquisition of 30% non-controlling interest of a consolidated subsidiary, Avinode Group AB.