Regulatory Matters, Commitments, Contingencies and Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2015

Regulatory Matters, Commitments, Contingencies And Environmental Liabilities [Abstract]

Operating Leases of Lessee Disclosure [Table Text Block]

We have certain non-cancelable leases for property and equipment, which require fixed monthly rental payments and expire at various dates through 2058. The table below reflects rental expense under these operating leases included in operating expenses in the accompanying statements of operations, which include contingent rentals, and rental expense recovered through related sublease rental income:



	Years Ended December 31,
	2015			2014			2013
Rental expense⁽¹⁾	$	176		$	159		$	151
Less: Sublease rental income	(16		)	(26		)	(24		)
Rental expense, net	$	160		$	133		$	127


⁽¹⁾	Includes contingent rentals totaling $26 million, $24 million and $22 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Future Minimum Lease Commitments

Future minimum lease commitments for such leases are:



Years Ending December 31:
2016	$	57
2017	53
2018	44
2019	39
2020	40
Thereafter	252
Future minimum lease commitments	485
Less: Sublease rental income	(34		)
Net future minimum lease commitments	$	451

Environmental Exit Costs by Cost [Table Text Block]

The table below reflects the amounts of accrued liabilities recorded in our consolidated balance sheets related to environmental matters that are considered to be probable and reasonably estimable. Currently, we are not able to estimate possible losses or a range of possible losses in excess of amounts accrued. Except for matters discussed above, we do not have any material environmental matters assessed as reasonably possible that would require disclosure in our consolidated financial statements.



	December 31,
	2015		2014
Current	$	41	$	41
Non-current	326		360
Total environmental liabilities	$	367	$	401

- Definition

Tabular disclosure of a lessee's leasing arrangements including: (1) the basis on which contingent rental payments are determined, (2) the existence and terms of renewal or purchase options and escalation clauses, (3) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

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