Document and Entity Information
3 Months Ended
Mar. 31, 2019
Document And Entity Information [Abstract]  
Entity Registrant Name Targa Resources Partners LP
Trading Symbol NGLS
Entity Central Index Key 0001379661
Current Fiscal Year End Date --12-31
Entity Filer Category Non-accelerated Filer
Document Fiscal Year Focus 2019
Document Fiscal Period Focus Q1
Document Type 10-Q
Amendment Flag false
Document Period End Date Mar. 31, 2019
Entity Small Business false
Entity Emerging Growth Company false