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Commitments and Contingent Liabilities (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
The table below depicts future gross minimum rental commitments under our operating leases and rights-of-way obligations as of December 31, 2015 (in millions):
Year
 
Commitment
2016
 
$
103

2017
 
90

2018
 
83

2019
 
78

2020
 
69

Thereafter
 
406

Total minimum payments
 
$
829