Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income (loss)	$ 25.9	$ (173.7)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Impairment	3.6	231.1
Depreciation and amortization	18.5	23.0
Non-cash stock-based compensation	4.5	(2.2)
Provisions for credit losses on accounts receivable	0.5	6.0
Deferred income taxes	11.5	(64.3)
Other	3.4	2.3
Changes in operating assets and liabilities
Accounts and notes receivable	(10.6)	52.7
Prepaid and other current assets	(10.1)	10.0
Accounts payable	12.1	(14.1)
Accrued liabilities and other	(29.2)	(42.9)
Net cash provided by operating activities	30.1	27.9
Investing activities
Purchases of leasehold improvements and equipment	(6.8)	(5.8)
Cost of contracts	(1.0)	(2.3)
Proceeds from sale of other investments and equipment	0.4	0.8
Noncontrolling interest buyout		(1.7)
Net cash used in investing activities	(7.4)	(9.0)
Financing activities
Proceeds from credit facility revolver	297.2	404.2
Payments on credit facility revolver	(295.9)	(401.5)
Payments on credit facility term loan	(11.2)	(8.4)
Payments of debt issuance costs	(1.3)
Payments on other long-term borrowings	(5.8)	(5.0)
Distributions to noncontrolling interest	(1.7)	(1.1)
Repurchases of common stock		(15.3)
Net cash used in financing activities	(18.7)	(27.1)
Effect of exchange rate changes on cash and cash equivalents		(0.3)
Increase (decrease) in cash and cash equivalents	4.0	(8.5)
Cash and cash equivalents at beginning of year	13.9	24.1
Cash and cash equivalents at end of period	17.9	15.6
Cash paid during the period for
Interest	14.4	13.7
Income taxes	$ 0.6	$ 0.8