organic local-currency sales growth (which includes organic volume and selling price impacts) was 2.6 percent, acquisitions added 0.8 percent, and foreign currency impacts reduced sales by 2.4 percent. Five of 3M’s six business segments posted operating income margins in excess of 21 percent in 2012. Worldwide operating income margins for 2012 were 21.7 percent, compared to 20.9 percent for 2011.

 

Sales in 2011 increased 11.1 percent, led by Industrial and Transportation at 19.5 percent, Safety, Security and Protection Services at 15.2 percent, and Health Care at 11.5 percent. Electro and Communications sales increased 8.6 percent and Consumer and Office sales increased 7.8 percent. Sales declined 5.4 percent in Display and Graphics, due to fewer orders for optical films. Total company organic local-currency sales growth was 4.7 percent, acquisitions added 3.3 percent, and foreign currency impacts added 3.1 percent. 3M’s six business segments all posted operating income margins in excess of 20 percent in 2011 and 2010. Worldwide operating income margins for 2011 were 20.9 percent, compared to 22.2 percent for 2010.

 

3M generated $5.3 billion of operating cash flow in 2012, an increase of $16 million when compared to 2011. This followed an increase of $110 million when comparing 2011 to 2010. Refer to the section entitled “Financial Condition and Liquidity” later in MD&A for a discussion of items impacting cash flows. In February 2013, 3M’s Board of Directors authorized the repurchase of up to $7.5 billion of 3M’s outstanding common stock, which replaced the Company’s previous repurchase program. This new program has no pre-established end date. In 2012, the Company purchased $2.204 billion of treasury stock, compared to $2.701 billion in 2011 and $854 million in 2010. In February 2013, 3M’s Board of Directors authorized a dividend increase of 7.6 percent for 2013, marking the 55th consecutive year of dividend increases for 3M. 3M’s debt to total capital ratio (total capital defined as debt plus equity) was 25 percent at December 31, 2012, 2011 and 2010. 3M has an AA- credit rating with a stable outlook from Standard & Poor’s and an Aa2 credit rating with a stable outlook from Moody’s Investors Service. The Company has significant cash on hand and sufficient additional access to capital markets to meet its funding needs.

 

In 2012, the Company experienced stable to declining cost for most raw material categories and transportation fuel costs. This was driven by year-on-year cost decreases in many feedstock categories, including petroleum based materials, minerals, metals and wood pulp based products. To date the Company is receiving sufficient quantities of all raw materials to meet its reasonably foreseeable production requirements. It is impossible to predict future shortages of raw materials or the impact any such shortages would have. 3M has avoided disruption to its manufacturing operations through careful management of existing raw material inventories and development and qualification of additional supply sources. 3M manages commodity price risks through negotiated supply contracts, price protection agreements and forward