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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Lease commitments

As of December 31, 2016, future minimum rental payments required under operating leases and rental receipts expected under operating leases that have noncancellable lease terms in excess of one year were as follows:

 

Operating Leases

 

Operating Leases

Future Minimum

Future Minimum

Rental Payments

Rental Receipts

(Dollars in millions)

 

 

 

 

 

2017

$

158 

 

$

50 

2018

 

143 

 

 

42 

2019

 

130 

 

 

33 

2020

 

117 

 

 

22 

2021

 

106 

 

 

8 

Thereafter

 

816 

 

 

1 

Total

$

1,470 

 

$

156