Acquisitions and divestitures (Details) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Significant Acquisitions and Disposals [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 621,716,000	$ 13,652,000
Revenue, Net	3,065,495,000	3,106,832,000	6,280,430,000	6,340,713,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	17,000,000
Business Divestitures [Member]
Significant Acquisitions and Disposals [Line Items]
Revenue, Net			158,000,000
Series of Individually Immaterial Business Acquisitions [Member]
Significant Acquisitions and Disposals [Line Items]
Number of Businesses Acquired			8
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period			484,000,000
Payments to Acquire Businesses, Net of Cash Acquired			622,000,000
Noncash or Part Noncash Acquisition, Debt Assumed			$ 114,000,000