Business Combinations (Narratives) (Details) |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
|
Jun. 30, 2017
USD ($)
|
Mar. 31, 2017
USD ($)
segment
|
Jul. 01, 2016
USD ($)
|
Jun. 30, 2017
USD ($)
segment
acquisition
|
Jul. 01, 2016
USD ($)
|
Dec. 30, 2016
segment
|
|
| Business Acquisition [Line Items] | ||||||
| Number of Reportable Segments | segment | 4 | 4 | 4 | |||
| Gain (Loss) on Disposition of Business | $ 8,000,000 | $ 2,700,000 | ||||
| Number of Businesses Acquired | acquisition | 7 | |||||
| Business Acquisition, Transaction Costs | $ 4,300,000 | $ 900,000 | $ 6,400,000 | 2,500,000 | ||
| Goodwill, Impairment Loss | $ 0 | |||||
| Maximum | ||||||
| Business Acquisition [Line Items] | ||||||
| Revenue of Business Acquiree Since Acquisition Date Percentage of Total Revenue | 1.00% | |||||
| Series of Individually Immaterial Business Acquisitions [Member] | ||||||
| Business Acquisition [Line Items] | ||||||
| Cash Payments to Acquire Businesses | $ 158,000,000 | |||||
| General and Administrative Expense [Member] | ||||||
| Business Acquisition [Line Items] | ||||||
| Business Acquisition, Transaction Costs | $ 4,300,000 | $ 900,000 | $ 6,400,000 | $ 2,500,000 | ||