XML 74 R52.htm IDEA: XBRL DOCUMENT v3.10.0.1
Commitments and Contingencies (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Feb. 19, 2019
Commitments and Contingencies Disclosure [Abstract]        
Standby letters of credit and guarantees outstanding $ 294,000,000 $ 174,000,000    
Subsidiary payment obligations demand for payment       $ 0
Total Minimum Commitments [Abstract]        
2019 2,150,978,000      
2020 1,416,968,000      
2021 996,344,000      
2022 803,240,000      
2023 509,373,000      
2024 and beyond 931,142,000      
Total Minimum Commitments 6,808,045,000      
Rental expenses associated with existing leases $ 233,000,000 $ 200,000,000 $ 204,000,000