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BORROWINGS (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Schedule of Long-term Borrowings
 
December 31,
(Dollars in millions)
2015
 
2014
Borrowings consisted of:
 
 
 
3% notes due 2015
$
—

 
$
250

2.4% notes due 2017
999

 
998

6.30% notes due 2018
167

 
169

5.5% notes due 2019
250

 
250

2.7% notes due 2020
799

 
798

4.5% notes due 2021
250

 
250

3.6% notes due 2022
900

 
903

7 1/4% debentures due 2024
244

 
244

7 5/8% debentures due 2024
54

 
54

3.8% notes due 2025
796

 
796

7.60% debentures due 2027
222

 
222

4.8% notes due 2042
497

 
497

4.65% notes due 2044
877

 
877

Credit facility borrowings and commercial paper borrowings
980

 
1,235

Capital leases
4

 
6

Total borrowings
7,039

 
7,549

Borrowings due within one year
431

 
301

Long-term borrowings
$
6,608

 
$
7,248
Schedule of Fair Value of Borrowings


 
 
 
Fair Value Measurements at December 31, 2015
(Dollars in millions)
 
Recorded Amount
December 31, 2015
  
Total Fair Value
 
 Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
Long-term borrowings
 
$
6,608

 
$
6,647

 
$
6,094

 
$
553

 
$
—

 
 
 
 
 
Fair Value Measurements at December 31, 2014
(Dollars in millions)
 
Recorded Amount
December 31,
2014
 
Total Fair Value
 
 Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
Long-term borrowings
 
$
7,248

 
$
7,557

 
$
6,366

 
$
1,191

 
$
—