CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
OPERATING REVENUES	$ 5,818	$ 4,034	$ 17,665	$ 12,333
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	2,672	1,927	8,205	5,705
Selling, general and administrative	967	710	3,191	2,404
Depreciation and amortization	1,285	910	3,858	2,739
Total operating expenses	4,924	3,547	15,254	10,848
OPERATING INCOME	894	487	2,411	1,485
OTHER (EXPENSE) INCOME
Interest expense	(557)	(362)	(1,638)	(1,000)
Net loss on early retirement of debt	(33)	0	(34)	(5)
Other income, net	25	14	63	6
Total other expense, net	(565)	(348)	(1,609)	(999)
INCOME BEFORE INCOME TAX EXPENSE	329	139	802	486
Income tax expense	57	47	123	214
NET INCOME	$ 272	$ 92	$ 679	$ 272
BASIC AND DILUTED EARNINGS PER COMMON SHARE
BASIC (in dollars per share)	$ 0.25	$ 0.17	$ 0.64	$ 0.50
DILUTED (in dollars per share)	$ 0.25	$ 0.17	$ 0.63	$ 0.50
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING
BASIC (in shares)	1,066,904	541,521	1,065,410	541,113
DILUTED (in shares)	1,072,351	541,963	1,069,726	541,879