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PROPERTY AND EQUIPMENT.
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT PROPERTY AND EQUIPMENT.
Property and equipment at December 31 consists of: 
(in millions)20202019
Computer and communications software and equipment$1,113.1 $963.8 
Buildings and improvements457.5 466.1 
Leasehold improvements169.2 157.3 
Furniture and other equipment193.3 193.5 
Land37.2 33.4 
Leased land— 2.7 
1,970.3 1,816.8 
Less accumulated depreciation and amortization1,274.9 1,142.4 
Total$695.4 $674.4 

Compensation and related costs attributable to the development of computer software for internal use, totaling $125.9 million in 2020, $95.5 million in 2019, and $85.5 million in 2018, have been capitalized.