Consolidated Statements of Changes in Partners' Equity (USD $) In Millions, except Share data	Total	Common Stock	Predecessor	Noncontrolling Interest
Balance at Dec. 31, 2013	$ 1,783.8	$ 0	$ 1,783.8	$ 0
Common Stock, Shares, Outstanding [Member]		164,000,000
Contributions by (distritbutions to) the Predecessor	(92.6)	0	(92.6)	0
Issuance of units for reorganization of predecessor equity	0	920.0	(1,726.7)	806.7
Issuance of units for reorganization of predecessor equity, units		115,500,000
Issuance of common units for acquisition of Company	4,651.4	1,822.6	0	2,828.8
Elimination of deferred taxes attributable to non-controlling interest in predecessor equity	207.2	0	0	207.2
Share-based Compensation	1.2	0.6	0	0.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		0
Issuance of common units (shares)		48,500,000
ContributionFromNonControllingInterest	0.4	0	0	0.4
Net income	49.4	6.8	35.5	7.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest shares		0
Balance at Mar. 31, 2014	$ 6,600.8	$ 2,750.0	$ 0	$ 3,850.8