Additionally, we have changed our reporting structure to better reflect our strategic priorities. An 8-K was filed with the SEC that restated past results under the new reporting structure. All results discussed during the call will be reported using our 3 new segments, subsea Technologies, Surface Technologies and Energy Infrastructure, unless we indicate otherwise.
I will now turn the call over to John Gremp, FMC Technologies Chairman, President and CEO.
John T. Gremp
Good morning. Welcome to our fourth quarter 2011 conference call. With me today are Maryann Seaman, our CFO; and Bob Potter, our Executive Vice President. I'll start with some highlights from the quarter and for the year. Maryann will provide specifics on our financial performance and our outlook for 2012 and then we'll open up the call for your questions.
Regarding the results for the quarter
earnings were $0.41 per diluted share for the quarter and $1.64 for the full year, a 7% increase over our prior year performance and our 10th consecutive year of earnings growth. Despite the earnings growth, our subsea Results were below our previous guidance.
We reached our revenue expectation, but as we discussed last quarter, the continuing challenges associated with ramping up our subsea business by almost 40% from the first quarter to the fourth quarter of 2011 negatively impacted margins. We also incurred some other specific costs, which I'll discuss later.
Total company revenue was $1.5 billion for the quarter and $5.1 billion for the year. Fourth quarter operating income was $166 million, bringing our 2011 total to $619 million. Subsea Technologies inbounded $1.3 billion of awards in the fourth quarter, bringing our full year total to $3.9 billion. Our backlog now stands at $4.1 billion.
Revenue for the quarter in Subsea Technologies was $964 million, an increase of 38% over the prior year quarter and 16% sequentially. This volume is a record and enabled us to reach $3.3 billion in revenue for the year. In 2012, we expect to generate approximately $4 billion in revenue, and our fourth quarter revenue of almost $1 billion supports this target.