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Guarantor and Nonguarantor Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | $ (190,737) | $ (210,017)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (59,863) | (79,058)
Acquisition of GWS, including net assets acquired, intangibles and goodwill |  | (21,900)
Acquisition of businesses (other than GWS),including net assets acquired, intangibles and goodwill, net of cash acquired | (40,452) | (16,569)
Contributions to unconsolidated subsidiaries | (32,660) | (27,431)
Distributions from unconsolidated subsidiaries | 96,941 | 93,912
Decrease (increase) in restricted cash | (3,022) | (478)
Purchase of available for sale securities | (19,734) | (23,984)
Proceeds from the sale of available for sale securities | 17,277 | 22,061
Other investing activities, net | 2,608 | 13,929
Net cash used in investing activities | (38,905) | (39,518)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Repayment of senior term loans |  | (14,375)
Proceeds from revolving credit facility | 911,000 | 1,356,000
Repayment of revolving credit facility | (911,000) | (1,200,000)
Proceeds from notes payable on real estate held for sale and under development | 2,137 | 13,315
Repayment of notes payable on real estate held for sale and under development | (9,189) | (4,102)
Units repurchased for payment of taxes on equity awards | (1,900) | (5,112)
Non-controlling interest contributions | 1,941 | 821
Non-controlling interest distributions | (3,904) | (3,517)
Payment of financing costs |  | (5,529)
Other financing activities, net | (3,666) | 3,987
Net cash (used in) provided by financing activities | (14,581) | 141,488
Effect of currency exchange rate changes on cash and cash equivalents | 17,328 | (588)
NET DECREASE IN CASH AND CASH EQUIVALENTS | (226,895) | (108,635)
CASH AND CASH EQUIVALENTS, AT BEGINNING OF PERIOD | 762,576 | 540,403
CASH AND CASH EQUIVALENTS, AT END OF PERIOD | 535,681 | 431,768
Cash paid during the period for: |  |
Interest | 59,490 | 63,420
Income taxes, net | 163,885 | 160,353
Parent [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | 49,435 | 57,811
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Units repurchased for payment of taxes on equity awards | (1,900) | (5,112)
(Increase) decrease in intercompany receivables, net | (47,895) | (53,774)
Other financing activities, net | 360 | 1,074
Net cash (used in) provided by financing activities | (49,435) | (57,812)
NET DECREASE IN CASH AND CASH EQUIVALENTS |  | (1)
CASH AND CASH EQUIVALENTS, AT BEGINNING OF PERIOD | 7 | 5
CASH AND CASH EQUIVALENTS, AT END OF PERIOD | 7 | 4
Guarantor Subsidiaries [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | (235,596) | (192,950)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (39,925) | (51,510)
Acquisition of GWS, including net assets acquired, intangibles and goodwill |  | (21,900)
Acquisition of businesses (other than GWS),including net assets acquired, intangibles and goodwill, net of cash acquired | (31,780) | (1,381)
Contributions to unconsolidated subsidiaries | (23,752) | (21,549)
Distributions from unconsolidated subsidiaries | 92,304 | 91,421
Decrease (increase) in restricted cash | 1,618 | 3,250
Purchase of available for sale securities | (19,734) | (23,984)
Proceeds from the sale of available for sale securities | 17,277 | 22,061
Other investing activities, net | 2,486 | 6,688
Net cash used in investing activities | (1,506) | 3,096
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
(Increase) decrease in intercompany receivables, net | 47,320 | 110,453
Other financing activities, net | (3,145) | (1,173)
Net cash (used in) provided by financing activities | 44,175 | 109,280
NET DECREASE IN CASH AND CASH EQUIVALENTS | (192,927) | (80,574)
CASH AND CASH EQUIVALENTS, AT BEGINNING OF PERIOD | 264,121 | 147,410
CASH AND CASH EQUIVALENTS, AT END OF PERIOD | 71,194 | 66,836
Cash paid during the period for: |  |
Income taxes, net | 82,017 | 107,070
Nonguarantor Subsidiaries [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | (20,707) | (84,255)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (19,938) | (27,548)
Acquisition of businesses (other than GWS),including net assets acquired, intangibles and goodwill, net of cash acquired | (8,672) | (15,188)
Contributions to unconsolidated subsidiaries | (8,908) | (5,882)
Distributions from unconsolidated subsidiaries | 4,637 | 2,491
Decrease (increase) in restricted cash | (4,640) | (3,728)
Other investing activities, net | 122 | 7,241
Net cash used in investing activities | (37,399) | (42,614)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from notes payable on real estate held for sale and under development | 2,137 | 13,315
Repayment of notes payable on real estate held for sale and under development | (9,189) | (4,102)
Non-controlling interest contributions | 1,941 | 821
Non-controlling interest distributions | (3,904) | (3,517)
Payment of financing costs |  | (110)
(Increase) decrease in intercompany receivables, net | 20,689 | 91,221
Other financing activities, net | (881) | 4,086
Net cash (used in) provided by financing activities | 10,793 | 101,714
Effect of currency exchange rate changes on cash and cash equivalents | 17,328 | (588)
NET DECREASE IN CASH AND CASH EQUIVALENTS | (29,985) | (25,743)
CASH AND CASH EQUIVALENTS, AT BEGINNING OF PERIOD | 481,559 | 384,509
CASH AND CASH EQUIVALENTS, AT END OF PERIOD | 451,574 | 358,766
Cash paid during the period for: |  |
Interest | 44 | 1,337
Income taxes, net | 81,868 | 53,283
CBRE Services [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES: | 16,131 | 9,377
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Repayment of senior term loans |  | (14,375)
Proceeds from revolving credit facility | 911,000 | 1,356,000
Repayment of revolving credit facility | (911,000) | (1,200,000)
Payment of financing costs |  | (5,419)
(Increase) decrease in intercompany receivables, net | (20,114) | (147,900)
Net cash (used in) provided by financing activities | (20,114) | (11,694)
NET DECREASE IN CASH AND CASH EQUIVALENTS | (3,983) | (2,317)
CASH AND CASH EQUIVALENTS, AT BEGINNING OF PERIOD | 16,889 | 8,479
CASH AND CASH EQUIVALENTS, AT END OF PERIOD | 12,906 | 6,162
Cash paid during the period for: |  |
Interest | $ 59,446 | $ 62,083

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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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