Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 376,282	$ 307,833
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	215,498	195,657
Amortization and write-off of financing costs	9,703	11,172
Write-down of impaired assets		8,615
Gain on sale of loans, servicing rights and other assets	(105,178)	(60,299)
Net realized and unrealized losses (gains) from investments	4,927	(10,637)
Gain on disposition of real estate held for investment	(8,573)	(28,005)
Equity income from unconsolidated subsidiaries	(39,386)	(67,564)
Provision for doubtful accounts	7,039	6,425
Deferred income taxes	(5,466)	6,304
Compensation expense related to equity awards	48,119	44,130
Incremental tax benefit from stock options exercised	(2,270)	(803)
Distribution of earnings from unconsolidated subsidiaries	22,900	18,556
Tenant concessions received	6,770	15,356
Purchase of trading securities	(64,442)	(50,973)
Proceeds from sale of trading securities	57,901	47,830
Increase in receivables	(3,022)	(138,937)
Increase in prepaid expenses and other assets	(71,762)	(25,761)
(Increase) decrease in real estate held for sale and under development	(11,542)	16,417
Increase (decrease) in accounts payable and accrued expenses	4,490	(44,543)
Decrease in compensation and employee benefits payable and accrued bonus and profit sharing	(269,396)	(74,914)
Increase in income taxes receivable/payable	(4,584)	(99,872)
(Decrease) increase in other liabilities	(12,800)	421
Other operating activities, net	(12,798)	(7,930)
Net cash provided by operating activities	142,410	68,478
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(85,324)	(92,618)
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired	(103,140)	(132,541)
Contributions to unconsolidated subsidiaries	(45,792)	(40,103)
Distributions from unconsolidated subsidiaries	42,738	62,978
Net proceeds from disposition of real estate held for investment	3,584	77,278
Additions to real estate held for investment	(1,773)	(5,043)
Proceeds from the sale of servicing rights and other assets	21,434	18,169
(Increase) decrease in restricted cash	(41,864)	4,431
Purchase of available for sale securities	(31,919)	(68,984)
Proceeds from the sale of available for sale securities	33,063	61,357
Other investing activities, net	(1,290)	570
Net cash used in investing activities	(1,631,946)	(114,506)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from senior term loans	900,000
Repayment of senior term loans	(651,863)	(29,738)
Proceeds from revolving credit facility	2,107,500	1,688,568
Repayment of revolving credit facility	(1,711,512)	(1,672,359)
Proceeds from issuance of senior notes	595,440	300,000
Proceeds from notes payable on real estate held for investment		5,022
Repayment of notes payable on real estate held for investment	(1,173)	(27,241)
Proceeds from notes payable on real estate held for sale and under development	12,584	4,884
Repayment of notes payable on real estate held for sale and under development		(44,959)
Proceeds from short-term borrowings, net	15,862	4,545
Shares repurchased for payment of taxes on equity awards	(24,517)	(16,656)
Proceeds from exercise of stock options	6,755	4,466
Incremental tax benefit from stock options exercised	2,270	803
Non-controlling interests contributions	4,691	1,415
Non-controlling interests distributions	(13,595)	(31,998)
Payment of financing costs	(30,130)	(3,149)
Other financing activities, net	(2,142)	(1,446)
Net cash (used in) provided by financing activities	1,210,170	182,157
Effect of currency exchange rate changes on cash and cash equivalents	(21,161)	(12,683)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(300,527)	123,446
CASH AND CASH EQUIVALENTS, AT BEGINNING OF PERIOD	740,884	491,912
CASH AND CASH EQUIVALENTS, AT END OF PERIOD	440,357	615,358
Cash paid during the period for:
Interest	80,822	80,636
Income tax payments, net	210,634	266,210
4.875% Senior Notes [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of senior notes	595,440
5.25% senior notes [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of senior notes		300,000
Global Workplace Solutions (GWS) [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired	(1,421,663)
Other than GWS acquisition [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired	$ (103,140)	$ (132,541)