CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
OPERATING REVENUES	$ 4,419	$ 4,541	$ 8,870	$ 9,079
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,959	1,962	3,870	3,897
Selling, general and administrative	863	831	1,714	1,674
Depreciation and amortization	1,048	1,093	2,088	2,200
Total operating expenses	3,870	3,886	7,672	7,771
OPERATING INCOME	549	655	1,198	1,308
OTHER (EXPENSE) INCOME
Interest expense	(327)	(325)	(655)	(656)
Other income (expense), net	12	(7)	14	2
Total other expense, net	(315)	(332)	(641)	(654)
INCOME BEFORE INCOME TAX EXPENSE	234	323	557	654
Income tax expense	91	130	222	258
Net income	$ 143	$ 193	$ 335	$ 396
BASIC AND DILUTED EARNINGS PER COMMON SHARE
BASIC (in dollars per share)	$ 0.26	$ 0.34	$ 0.60	$ 0.69
DILUTED (in dollars per share)	0.26	0.34	0.60	0.69
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.54	$ 0.54	$ 1.08	$ 1.08
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
BASIC (in shares)	558,640	567,915	560,304	571,225
DILUTED (in shares)	559,220	569,032	561,362	572,244