v3.26.3
Income Per Share and Stockholders’ Equity - Schedule of Calculations of Basic and Diluted Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Basic Income Per Share        
Net income attributable to CBRE Group, Inc. stockholders $ 443 $ 363 $ 965 $ 741
Weighted average shares outstanding for basic income per share (in shares) 289,273,856 297,557,891 291,788,599 298,589,340
Basic income per share attributable to CBRE Group, Inc. stockholders (in dollars per share) $ 1.53 $ 1.22 $ 3.31 $ 2.48
Diluted Income Per Share        
Net income attributable to CBRE Group, Inc. stockholders $ 443 $ 363 $ 965 $ 741
Weighted average shares outstanding for basic income per share (in shares) 289,273,856 297,557,891 291,788,599 298,589,340
Dilutive effect of contingently issuable shares (in shares) 2,335,991 2,699,439 2,327,028 2,461,001
Weighted average shares outstanding for diluted income per share (in shares) 291,609,847 300,257,330 294,115,627 301,050,341
Diluted income per share attributable to CBRE Group, Inc. stockholders (in dollars per share) $ 1.52 $ 1.21 $ 3.28 $ 2.46