CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
OPERATING ACTIVITIES:
Net income (loss)	$ 57	$ (4)	$ 69
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities from continuing operations:
Depreciation and amortization expense	215	207	198
Amortization of long-term debt deferred financing costs	7	6	8
(Loss) gain on asset sales	6	(44)	0
Impairment charges	2	20	43
Loss on extinguishment of debt	84	0	2
Provision for doubtful accounts	9	2	1
Stock-based compensation expense	18	16	18
Equity in net income from unconsolidated investments	1	4	13
Increase (Decrease) in Deferred Income Taxes	(193)	21	11
IRS audit settlement	0	0	(93)
Interest and Dividend Income, Operating	2	2	5
Increase (Decrease) in Restricted Investments for Operating Activities	(1)	(22)	(28)
Other, net	(13)	(1)	21
Change in operating assets and liabilities, net of effects of acquisitions:
Receivables	(27)	(19)	(12)
Debt services billings in excess of revenue recognized	5	(1)	5
Increase (Decrease) in Prepaid Expense and Other Assets	0	18	(1)
Accounts payable and accrued expenses	59	45	(8)
Deferred revenue	7	(2)	(5)
Other, net	5	2	(1)
Net cash provided by operating activities	243	286	254
INVESTING ACTIVITIES:
Payments to Acquire Productive Assets	277	359	376
Acquisition of businesses, net of cash acquired	(16)	(9)	(72)
Proceeds from Sale of Other Assets, Investing Activities	4	109	0
Proceeds from Insurance Settlement, Investing Activities	8	3	1
Other, net	(8)	2	(1)
Net cash used in investing activities	(289)	(254)	(448)
FINANCING ACTIVITIES:
Proceeds from borrowings on long-term debt	400	0	294
Proceeds from borrowings on revolving credit facility	(952)	(744)	(895)
Proceeds from equipment financing capital lease	(5)	(4)	(4)
Proceeds from borrowings on project debt	0	0	59
Proceeds from borrowings on Dublin project financing	643	159	86
Proceeds from settlement of Note Hedge	(17)	0	0
Payments related to cash conversion option	(132)	0	0
Principal payments on long-term debt	(415)	(4)	(196)
Payments of borrowings on revolving credit facility	(850)	(749)	(692)
Proceeds from Long-term Capital Lease Obligations	0	0	15
Principal payments on project debt	(382)	(51)	(85)
Payments of deferred financing costs	(21)	(6)	(11)
Cash dividends paid to stockholders	(131)	(131)	(133)
Common stock repurchased	0	(20)	(30)
Financing of insurance premiums, net	20	0	0
Change in restricted funds held in trust	(37)	28	5
Other, net	(3)	(10)	0
Net cash used in financing activities	3	(44)	203
Effect of exchange rate changes on cash and cash equivalents	5	0	(4)
Net (decrease) increase in cash and cash equivalents	(38)	(12)	5
Less: Cash and cash equivalents of assets held for sale and discontinued operations at end of period	0	0	2
Cash Equivalents, at Carrying Value	46	84	94
Cash and cash equivalents of continuing operations at end of period	46	84	96
Cash Paid for Interest and Income Taxes:
Cash Paid for Interest	149	150	141
Cash Paid of Income taxes, net of refunds	0	6	2
DublinFinancing [Member]
FINANCING ACTIVITIES:
Payments of deferred financing costs	$ (19)	$ 0	$ 0