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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of fixed assets
The components of fixed assets are as follows:
December 31,
 
 
 
 
(In millions of dollars)
 
2017

 
2016

Furniture and equipment
 
$
1,179

 
$
1,113

Land and buildings
 
385

 
389

Leasehold and building improvements
 
974

 
906

 
 
2,538

 
2,408

Less-accumulated depreciation and amortization
 
(1,826
)
 
(1,683
)
 
 
$
712

 
$
725
Diluted earnings per share for continuing operations
Reconciliations of the applicable components used to calculate basic and diluted EPS - Continuing Operations are presented below. The reconciling items related to the EPS calculation are the same for both basic and diluted EPS.
Basic and Diluted EPS Calculation - Continuing Operations
(In millions, except per share figures)
2017

 
2016

 
2015

Net income from continuing operations
$
1,510

 
$
1,795

 
$
1,636

Less: Net income attributable to non-controlling interests
20

 
27

 
37

 
$
1,490

 
$
1,768

 
$
1,599

Basic weighted average common shares outstanding
513

 
519

 
531

Dilutive effect of potentially issuable common shares
6

 
5

 
5

Diluted weighted average common shares outstanding
519

 
524

 
536

Average stock price used to calculate common stock equivalents
$
77.30

 
$
63.51

 
$
56.27
Schedule of Prospective Adoption of New Accounting Pronouncements