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Summary of Significant Accounting Policies Discussion (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Estimated Useful Life of Property, Plant, Equipment and Mine Development [Line Items] |  |
Error Impact on Consolidated Balance Sheet Table [Table Text Block] |  |
|  | Before Application of Accounting Guidance |  | Adjustment |  | After Application of Accounting Guidance
|  | (Dollars in millions)
Other current assets |  | $ | 503.1 |  |  | $ | (55.5 | ) |  | $ | 447.6 |
Investments and other assets |  | 382.6 |  |  | (18.9 | ) |  | 363.7 |
Total assets |  | 11,021.3 |  |  | (74.4 | ) |  | 10,946.9 |
Current portion of long-term debt |  | 5,930.4 |  |  | (55.5 | ) |  | 5,874.9 |
Long-term debt, less current portion |  | 385.2 |  |  | (18.9 | ) |  | 366.3 |
Total liabilities |  | 10,269.6 |  |  | (74.4 | ) |  | 10,195.2 |
Estimated useful life of plant and equipment | The estimated useful lives by category of assets are as follows:
|  |  | Years
Building and improvements |  |  | 3 to 34
Machinery and equipment |  |  | 3 to 34
Leasehold improvements |  |  | Shorter of Useful Life or Remaining Life of Lease

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