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Investment in Unconsolidated Affiliates Summarized Income Statement of Equity Method Investment (Details) (USD $) In Millions, unless otherwise specified	2 Months Ended
	Jun. 30, 2013
Summarized Income Statement of Equity Method Investment [Abstract]
Operating revenues	$ 502.0
Gross margin	207.4
Operating expenses	132.4
Net income	$ 65.1

The amount of gross profit (loss) reported by an equity method investment of the entity.

The amount of net income (loss) reported by an equity method investment of the entity.