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Capital Structure Financial Policies - (Tables)
 12 Months Ended
Dec. 31, 2017
CAPITAL STRUCTURE FINANCIAL POLICIES  
Schedule of components of ratios

                                                                                                                                                                                    

($ millions)

 

Capital
Measure
Target

 

December 31,
2017

 

December 31,
2016

 

Components of ratios

 

 

 

 

 

 

 

 

Short-term debt

 

 

 

2 136

 

1 273

 

 

Current portion of long-term debt

 

 

 
71

 
54

 

 

Long-term debt

 

 

 

13 372

 

16 103

 

 

 

Total debt

 

 

 

15 579

 

17 430

 

 

Less: Cash and cash equivalents

 

 

 

2 672

 

3 016

 

 

 

Net debt

 

 

 

12 907

 

14 414

 

 

Shareholders' equity

 

 

 

45 383

 

44 630

 

 

Total capitalization (total debt plus shareholders' equity)

 

 

 

60 962

 

62 060

 

 

Funds from operations(1)

 

 

 

9 139

 

5 988

 

Net debt to funds from operations

 

<3.0 times

 
1.4

 
2.4

 

Total debt to total debt plus shareholders' equity

 

 

 
26%

 
28%

 

 

 

 

 

(1)          

Funds from operations is calculated as cash flow from operating activities before changes in non-cash working capital, and is a non-GAAP financial measure.