CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Apr. 01, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 208.0	$ 174.1	$ 106.8	$ 165.8
Receivables, net	1,057.7	930.1
Inventories, net	1,143.6	1,044.4
Other current assets	213.4	190.8
Total current assets	2,622.7	2,339.4
Non-current assets
Property, plant and equipment, net	2,293.5	2,288.6
Goodwill	2,319.5	2,359.4
Intangibles and other assets, net	540.3	519.7
Total assets	7,776.0	7,507.1
Current liabilities
Short-term debt and current portion of long-term debt	425.6	219.8
Accounts payable	915.8	946.9
Accrued employee costs	197.2	278.4
Other current liabilities	204.3	240.7
Total current liabilities	1,742.9	1,685.8
Non-current liabilities
Long-term debt	3,405.3	3,085.3
Employee benefit obligations	1,148.9	1,238.1
Other non-current liabilities	221.4	207.9
Total liabilities	6,518.5	6,217.1
Shareholders' equity
Common stock (329,576,598 shares issued - 2013; 329,014,589 shares issued - 2012)	1,046.8	1,026.3
Retained earnings	3,633.9	3,580.8
Accumulated other comprehensive earnings (loss)	(399.1)	(352.4)
Treasury stock, at cost (180,744,373 shares - 2013; 179,285,288 shares - 2012)	(3,206.7)	(3,140.1)
Total Ball Corporation shareholders' equity	1,074.9	1,114.6
Noncontrolling interests	182.6	175.4
Total shareholders' equity	1,257.5	1,290.0
Total liabilities and shareholders' equity	$ 7,776.0	$ 7,507.1