Subsequent Event

6 Months Ended

Jun. 30, 2011

Subsequent Event [Abstract]

Subsequent Event

15.   Subsequent Event

On July 28, 2011, we acquired Oakleaf Global Holdings and its primary operations for $425 million, subject to certain working capital and other adjustments. The acquisition was funded with a combination of cash on hand and cash borrowed under our $2.0 billion revolving credit facility.

The acquired operations of Oakleaf Global Holdings, a privately-owned waste services company providing outsourced waste and recycling services through a nationwide network of third-party haulers, generated approximately $580 million in revenues in 2010. We acquired Oakleaf Global Holdings to advance our growth and transformation strategies. The acquisition is intended to increase our national accounts customer base and enhance our ability to provide comprehensive environmental solutions.