CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
OPERATING REVENUES	$ 4,554	$ 4,514	$ 13,424	$ 13,593
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,993	1,975	5,863	5,872
Selling, general and administrative	857	823	2,571	2,497
Depreciation and amortization	1,048	1,097	3,136	3,297
Total operating expenses	3,898	3,895	11,570	11,666
OPERATING INCOME	656	619	1,854	1,927
OTHER (EXPENSE) INCOME
Interest expense	(329)	(325)	(984)	(981)
Other income, net	2	5	16	7
Total other expense, net	(327)	(320)	(968)	(974)
INCOME BEFORE INCOME TAX EXPENSE	329	299	886	953
Income tax expense	124	111	346	369
Net income	$ 205	$ 188	$ 540	$ 584
BASIC AND DILUTED EARNINGS PER COMMON SHARE
BASIC (in dollars per share)	$ 0.37	$ 0.33	$ 0.97	$ 1.03
DILUTED (in dollars per share)	0.37	0.33	0.97	1.02
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.54	$ 0.54	$ 1.62	$ 1.62
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
BASIC (in shares)	554,897	565,965	558,502	569,472
DILUTED (in shares)	555,156	567,432	559,293	570,640