In accordance with the Safe Harbor provisions of the securities laws, we caution you that some of the statements made on this call may be forward-looking in nature and as such, are subject to various factors not under the control of the company. For a more complete description of these factors and the related risks and uncertainties, please refer to Cameron's annual report on Form 10-K, the company's most recent Form 10-Q and the recent earnings news release.
I will now turn the meeting over to Jack.
Jack B. Moore
Thank you, Jeff. Cameron reported earnings of $0.77 a share in Q4, excluding charges of $0.37, primarily related to the Deepwater Horizon agreement with BP. Revenues for the quarter totaled just over $2 billion, up 12% versus prior year's level, while revenues for all of 2011 came in just below $7 billion, which is a 13% increase over 2010. Orders for quarter 4 totaled $1.9 billion, up 12% versus Q4 of 2010. Total orders for 2011 totaled over $7.8 billion, a 35% increase versus 2010 and a record year for Cameron without the benefit of a major subsea project award.This past year, we have talked a lot about the benefits of having expanding our product and market diversity across our customer spending cycles, both onshore and offshore. Our results for 2011 confirm that this strategy is paying off. Actually, every business unit within Cameron, with the exception of Subsea, saw record orders in 2011. Overall backlog finished the year right at $6 billion. Now let me walk through the operating segments at Cameron and discuss the results for 2011, and our drivers for 2012. Our Drilling Production & Systems businesses finished 2011 with total bookings in excess of $4.3 billion, a 46% increase over 2010. Total revenues of $4.1 billion in 2011 were 9% higher than 2010. Cameron's Drilling Systems orders topped $1.8 billion in 2011. This was driven by record level of new project bookings for both onshore and offshore newbuilds and aftermarket bookings that increased by over 70% versus 2010's record levels.