XML 107 R82.htm IDEA: XBRL DOCUMENT v3.10.0.1
Employee Benefit Plans (Multiemployer Plan) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Multiemployer Plans [Line Items]      
Document Fiscal Year Focus 2018    
Multiemployer Plans General Nature The risks of participating in these multiemployer plans are different from single-employer plans in that assets contributed are pooled and may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. Lastly, if we choose to stop participating in some of our multiemployer plans, we may be required to pay those plans a withdrawal liability based on the underfunded status of the plan.    
Multiemployer Plans Period Contributions $ 151 $ 145 $ 131
Multiemployer Plans Period Contributions Other Than Pensions $ 20 $ 19 17
National Elevator Industry Plan [Member]      
Multiemployer Plans [Line Items]      
Entity Tax Identification Number 232694291    
Multiemployer Plans Certified Zone Status Green Green  
Multiemployer Plans Funding Improvement Plan And Rehabilitation Plan No    
Multiemployer Plans Period Contributions $ 120 $ 114 100
Multiemployer Plans Surcharge No    
Multiemployer Plans Collective Bargaining Arrangement Expiration Date Jul. 08, 2022    
Multiemployer Plans, Period Contributions, Significance of Contributions [true false] 1 1  
Other Funds [Member]      
Multiemployer Plans [Line Items]      
Multiemployer Plans Period Contributions $ 31 $ 31 $ 31