The change in operating capital for the nine months ended September 30, 2015 and 2014 was (in millions): | | | | | | | | | | 2015 | | 2014 | (Increase) decrease in accounts receivable | $ | (67.4 | ) | | $ | 333.4 |
| (Increase) decrease in work in process and other current assets | (367.0 | ) | | (333.5 | ) | Increase (decrease) in accounts payable | (132.2 | ) | | (724.2 | ) | Increase (decrease) in customer advances and other current liabilities | (68.1 | ) | | (252.1 | ) | Change in other assets and liabilities, net | (36.1 | ) | | (115.5 | ) | | $ | (670.8 | ) | | $ | (1,091.9 | ) | | | | | Income taxes paid | $ | 402.4 |
| | $ | 420.9 |
| Interest paid | $ | 125.3 |
| | $ | 147.1 |
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