| 
                                    
                                        02 Jul
                                        2019
 | T-3/A | 
                                     
                                        Amendment to a previously filed T-3
                                     | 
                                    Other
                                 |  | 
                        
                            | 
                                    
                                        02 Jul
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  | 
                        
                            | 
                                    
                                        28 Jun
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  | 
                        
                            | 
                                    
                                        28 Jun
                                        2019
 | T-3 | 
                                     
                                        Application for qualification of trust indentures. Filed pursuant to the Trust Indenture Act
                                     | 
                                    Other
                                 |  | 
                        
                            | 
                                    
                                        28 Jun
                                        2019
 | T-3 | 
                                     
                                        Application for qualification of trust indentures. Filed pursuant to the Trust Indenture Act
                                     | 
                                    Other
                                 |  | 
                        
                            | 
                                    
                                        25 Jun
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  | 
                        
                            | 
                                    
                                        10 Jun
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        10 Jun
                                        2019
 | SC 13G/A | 
                                     
                                        An amendment to the SC 13G filing
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        31 May
                                        2019
 | SD | 
                                     
                                        Specialized Disclosure Report
                                     | 
                                    Other
                                 |  | 
                        
                            | 
                                    
                                        17 May
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  |