CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
OPERATING REVENUES	$ 4,451us-gaap_Revenues	$ 4,538us-gaap_Revenues
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,911us-gaap_CostOfGoodsAndServicesSold	1,935us-gaap_CostOfGoodsAndServicesSold
Selling, general and administrative	851	843
Depreciation and amortization	1,040us-gaap_DepreciationAndAmortization	1,107us-gaap_DepreciationAndAmortization
Total operating expenses	3,802us-gaap_OperatingExpenses	3,885us-gaap_OperatingExpenses
OPERATING INCOME	649us-gaap_OperatingIncomeLoss	653us-gaap_OperatingIncomeLoss
OTHER (EXPENSE) INCOME
Interest expense	(328)us-gaap_InterestExpense	(331)us-gaap_InterestExpense
Other income, net	2us-gaap_OtherNonoperatingIncomeExpense	9us-gaap_OtherNonoperatingIncomeExpense
Total other expense, net	(326)us-gaap_NonoperatingIncomeExpense	(322)us-gaap_NonoperatingIncomeExpense
INCOME BEFORE INCOME TAX EXPENSE	323	331
Income tax expense	131us-gaap_IncomeTaxExpenseBenefit	128us-gaap_IncomeTaxExpenseBenefit
Net income	$ 192us-gaap_NetIncomeLoss	$ 203us-gaap_NetIncomeLoss
BASIC AND DILUTED EARNINGS PER COMMON SHARE
BASIC (in dollars per share)	$ 0.34us-gaap_EarningsPerShareBasic	$ 0.35us-gaap_EarningsPerShareBasic
DILUTED (in dollars per share)	$ 0.34us-gaap_EarningsPerShareDiluted	$ 0.35us-gaap_EarningsPerShareDiluted
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.54	$ 0.54
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
BASIC (in shares)	561,969	574,535
DILUTED (in shares)	563,505	575,456

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770