Acquisition (Tables)

3 Months Ended

Dec. 31, 2011

Business Combinations [Abstract]

Pro Forma Financial Information

The unaudited financial information in the table below summarizes the combined results of operations of PTC and MKS, on a pro forma basis, as though the companies had been combined as of the beginning of PTC's fiscal year 2010. The pro forma information presented includes the effects of business combination accounting resulting from the acquisition, including amortization charges from acquired intangibles assets, stock-based compensation charges for unvested stock options, interest expense on borrowings in connection with the acquisition, and the related tax effects as though the acquisition had been consummated as of the beginning of 2010. These pro forma results exclude the impact of the purchase accounting adjustment to deferred revenue and the transaction costs included in the historical results and the related tax effects. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisition had taken place at the beginning of 2010. The pro forma financial information is based on PTC's results of operations for the three months ended January 1, 2011, combined with MKS's results of operations for the three months ended January 31, 2011 (due to differences in reporting periods).

	Three months ended
	January 1, 2011
	(in millions, except per share amounts)
Revenue	$	284.5
Net income	$	12.5
Earnings per share—Basic	$	0.11
Earnings per share—Diluted	$	0.10