Attached files

file filename
EXCEL - IDEA: XBRL DOCUMENT - MPLX LPFinancial_Report.xls
10-Q - 10-Q - MPLX LPd431387d10q.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR2.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR8.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR7.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR9.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR1.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR6.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR3.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR4.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR5.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR25.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR31.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR28.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR19.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR33.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR48.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR16.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR32.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR35.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR37.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR18.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR44.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR22.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR29.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR24.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR12.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR47.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR40.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR46.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR45.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR17.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR42.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR41.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR27.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR26.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR11.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR15.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR21.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR30.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR13.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR23.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR36.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR38.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR39.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR20.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR34.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR14.htm
XML - IDEA: XBRL DOCUMENT - MPLX LPR10.htm
EX-31.2 - EX-31.2 - MPLX LPd431387dex312.htm
EX-32.2 - EX-32.2 - MPLX LPd431387dex322.htm
EX-32.1 - EX-32.1 - MPLX LPd431387dex321.htm
EX-31.1 - EX-31.1 - MPLX LPd431387dex311.htm
v2.4.0.6
Fair Value Measurements (Summary of Reconciliation of the Net Beginning and Ending Balances Recorded for Net Assets Classified as Level 3) (Detail) (Predecessor [Member], PFD Preferred Stock [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Predecessor [Member] | PFD Preferred Stock [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Beginning balance $ 0    $ 0 $ 51.1
Purchases of PFD Preferred Stock 0 [1]    [1] 0 [1] 260.6 [1]
Redemptions of PFD Preferred Stock 0 [1]    [1] 0 [1] (311.7) [1]
Ending balance $ 0    $ 0   
[1] For information on PFD Preferred Stock, see Note 4. The fair value of our PFD Preferred Stock investment was measured using an income approach since the securities were not publicly traded; therefore, they were classified as Level 3 in the fair value hierarchy.