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Guarantor and Nonguarantor Financial Statements - Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | $ (92,062) | $ (117,437)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (107,482) | (59,863)
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired | (264,702) | (25,326)
Contributions to unconsolidated subsidiaries | (21,042) | (32,660)
Distributions from unconsolidated subsidiaries | 28,235 | 23,970
Net proceeds from disposition of real estate held for investment | 14,174 |
Purchase of equity securities | (13,718) | (9,280)
Proceeds from sale of equity securities | 8,889 | 9,428
Purchase of available for sale debt securities | (18,723) | (10,454)
Proceeds from the sale of available for sale debt securities | 4,121 | 7,849
Other investing activities, net | (6,384) | 2,279
Net cash used in investing activities | (376,632) | (94,057)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from senior term loans | 550,000 |
Proceeds from revolving credit facility | 2,000,000 | 911,000
Repayment of revolving credit facility | (1,402,000) | (911,000)
Repayment of 5.00% senior notes (including premium) | (820,000) |
Proceeds from notes payable on real estate held for investment | 52 |
Repayment of notes payable on real estate held for investment | (13,028) |
Proceeds from notes payable on real estate held for sale and under development | 1,101 | 2,137
Repayment of notes payable on real estate held for sale and under development | (2,991) | (9,189)
Acquisition of businesses (cash paid for acquisitions more than three months after purchase date) | (11,183) | (15,126)
Repayment of debt assumed in acquisition of FacilitySource | (26,295) |
Units repurchased for payment of taxes on equity awards | (4,630) | (1,900)
Non-controlling interest contributions | 2,744 | 1,941
Non-controlling interest distributions | (7,652) | (3,904)
Other financing activities, net | (76) | (3,666)
Net cash provided by (used in) financing activities | 266,042 | (29,707)
Effect of currency exchange rate changes on cash and cash equivalents and restricted cash | (18,821) | 20,190
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH | (221,473) | (221,011)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT BEGINNING OF PERIOD | 824,819 | 831,412
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT END OF PERIOD | 603,346 | 610,401
Cash paid during the period for: |  |
Interest | 59,337 | 59,490
Income taxes, net | 159,833 | 163,885
Parent [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | 51,094 | 49,436
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Units repurchased for payment of taxes on equity awards | (4,630) | (1,900)
(Increase) decrease in intercompany receivables, net | (46,622) | (47,896)
Other financing activities, net | 158 | 360
Net cash provided by (used in) financing activities | (51,094) | (49,436)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT BEGINNING OF PERIOD | 7 | 7
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT END OF PERIOD | 7 | 7
CBRE Services [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | 2,234 | 16,131
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from senior term loans | 550,000 |
Proceeds from revolving credit facility | 2,000,000 | 911,000
Repayment of revolving credit facility | (1,402,000) | (911,000)
Repayment of 5.00% senior notes (including premium) | (820,000) |
(Increase) decrease in intercompany receivables, net | (337,235) | (20,114)
Other financing activities, net | (199) |
Net cash provided by (used in) financing activities | (9,434) | (20,114)
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH | (7,200) | (3,983)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT BEGINNING OF PERIOD | 15,604 | 16,889
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT END OF PERIOD | 8,404 | 12,906
Cash paid during the period for: |  |
Interest | 58,814 | 59,446
Guarantor Subsidiaries [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | (56,141) | (162,159)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (65,676) | (39,925)
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired | (259,338) | (20,584)
Contributions to unconsolidated subsidiaries | (17,030) | (23,752)
Distributions from unconsolidated subsidiaries | 24,986 | 19,333
Purchase of equity securities | (13,718) | (9,280)
Proceeds from sale of equity securities | 8,889 | 9,428
Purchase of available for sale debt securities | (18,723) | (10,454)
Proceeds from the sale of available for sale debt securities | 4,121 | 7,849
Other investing activities, net | (6,454) | 2,486
Net cash used in investing activities | (342,943) | (64,899)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Acquisition of businesses (cash paid for acquisitions more than three months after purchase date) | (13,166) | (11,196)
Repayment of debt assumed in acquisition of FacilitySource | (26,295) |
(Increase) decrease in intercompany receivables, net | 405,196 | 46,854
Other financing activities, net |  | (3,145)
Net cash provided by (used in) financing activities | 365,735 | 32,513
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH | (33,349) | (194,545)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT BEGINNING OF PERIOD | 114,143 | 271,088
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT END OF PERIOD | 80,794 | 76,543
Cash paid during the period for: |  |
Income taxes, net | 77,076 | 82,017
Nonguarantor Subsidiaries [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | (89,249) | (20,845)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (41,806) | (19,938)
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired | (5,364) | (4,742)
Contributions to unconsolidated subsidiaries | (4,012) | (8,908)
Distributions from unconsolidated subsidiaries | 3,249 | 4,637
Net proceeds from disposition of real estate held for investment | 14,174 |
Other investing activities, net | 70 | (207)
Net cash used in investing activities | (33,689) | (29,158)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from notes payable on real estate held for investment | 52 |
Repayment of notes payable on real estate held for investment | (13,028) |
Proceeds from notes payable on real estate held for sale and under development | 1,101 | 2,137
Repayment of notes payable on real estate held for sale and under development | (2,991) | (9,189)
Acquisition of businesses (cash paid for acquisitions more than three months after purchase date) | 1,983 | (3,930)
Non-controlling interest contributions | 2,744 | 1,941
Non-controlling interest distributions | (7,652) | (3,904)
(Increase) decrease in intercompany receivables, net | (21,339) | 21,156
Other financing activities, net | (35) | (881)
Net cash provided by (used in) financing activities | (39,165) | 7,330
Effect of currency exchange rate changes on cash and cash equivalents and restricted cash | (18,821) | 20,190
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH | (180,924) | (22,483)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT BEGINNING OF PERIOD | 695,065 | 543,428
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT END OF PERIOD | 514,141 | 520,945
Cash paid during the period for: |  |
Interest | 523 | 44
Income taxes, net | $ 82,757 | $ 81,868

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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition Amount of cash inflow (outflow) from long-term debt by a related party. Related parties, include, but are not limited to, affiliates, owners or officers and their immediate families, and pension trusts. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of cash inflow (outflow) from long-term debt wholly or partially secured by collateral. Excludes tax exempt secured debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3151-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash outflow from the repayments of a long-term debt originally issued by another party but is assumed by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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